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1. Microtube self-assembly leads to conformational freezing point depression

Author

Komarova, Tatiana, Zinn, Thomas, Narayanan, Theyencheri, Petukhov, Andrei V., and Landman, Jasper

Subjects
Condensed Matter - Soft Condensed Matter, Physics - Chemical Physics
Abstract

Concentric microtubes of $\beta$-cyclodextrin and SDS grow from the outside in and melt from the inside out, we observe using in situ small angle X-ray scattering. We find that the conformation of the crystalline bilayer affects the saturation concentration, providing an example of a phenomenon we call conformational freezing point depression. We propose a model based on freezing point depression, well known from undergraduate physics, and use it to explain the energetics of this hierarchical system, and giving access to material properties without free parameters.

Published
2023

2. Which Ion Dominates Temperature and Pressure Response of Halide Perovskites and Elpasolites?

Author

Muscarella, Loreta A., Jöbsis, Huygen J., Baumgartner, Bettina, Prins, P. Tim, Maaskant, D. Nicolette, Petukhov, Andrei V., Chernyshov, Dmitry, McMonagle, Charles J., and Hutter, Eline M.

Subjects
Condensed Matter - Materials Science
Abstract

Halide perovskite and elpasolite semiconductors are extensively studied for optoelectronic applications due to their excellent performance together with significant chemical and structural flexibility. However, there is still limited understanding of their basic elastic properties and how they vary with composition and temperature, which is relevant for synthesis and device operation. To address this, we performed temperature- and pressure-dependent synchrotron-based powder X-ray diffraction (XRD). In contrast to previous pressure-dependent XRD studies, our relatively low pressures (ambient to 0.06 GPa) enabled us to investigate the elastic properties of halide perovskites and elpasolites in their ambient crystal structure. We find that halide perovskites and elpasolites show common trends in the bulk modulus and thermal expansivity. Both materials become softer as the halide ionic radius increases from Cl to Br to I, exhibiting higher compressibility and larger thermal expansivity. The mixed-halide compositions show intermediate properties to the pure compounds. Contrary, cations show a minor effect on the elastic properties. Finally, we observe that thermal phase transitions in e.g., MAPbI3 and CsPbCl3 lead to a softening of the lattice, together with negative expansivity for certain crystal axes, already tens of degrees away from the transition temperature. Hence, the range in which the phase transition affects thermal and elastic properties is substantially broader than previously thought. These findings highlight the importance of considering the temperature-dependent elastic properties of these materials, since stress induced during manufacturing or temperature sweeps can significantly impact the stability and performance of the corresponding devices.

Published
2023

4. Angular X-ray Cross-Correlation Analysis Applied to the Scattering Data in 3D Reciprocal Space from a Single Crystal

Author

Lapkin, Dmitry, Shabalin, Anatoly, Meijer, Janne-Mieke, Kurta, Ruslan, Sprung, Michael, Petukhov, Andrei V., and Vartanyants, Ivan A.

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Materials Science
Abstract

We propose an application of the Angular X-ray Cross-Correlation Analysis (AXCCA) to the scattered intensity distribution measured in three-dimensional (3D) reciprocal space from a single crystalline sample. Contrary to the conventional application of AXCCA, when averaging over many two-dimensional (2D) diffraction patterns collected from different randomly oriented samples is required, the proposed approach gives an insight into the structure of a single specimen. This is particularly useful in studies of defect-reach samples that are unlikely to have the same structure. Here, we demonstrate an example of a qualitative structure determination of a colloidal crystal on the simulated as well as experimentally measured 3D scattered intensity distributions., Comment: 37 pages, 9 figures

Published
2022

5. Self-assembly of Colloidal Superballs Under Spherical Confinement of a Drying Droplet

Author

Schyck, Sarah N., Meijer, Janne-Mieke, Baldauf, Lucia, Schall, Peter, Petukhov, Andrei V., and Rossi, Laura

Subjects
Condensed Matter - Soft Condensed Matter, Physics - Applied Physics
Abstract

Understanding the relationship between colloidal building block shape and self-assembled material structure is important for the development of novel materials by self-assembly. In this regard, colloidal superballs are unique building blocks because their shape can smoothly transition between spherical and cubic. Assembly of colloidal superballs under spherical confinement results in macroscopic clusters with ordered internal structure. By utilizing Small Angle X-Ray Scattering (SAXS), we probe the internal structure of colloidal superball dispersion droplets during confinement. We observe and identify four distinct drying regimes that arise during compression via evaporating droplets, and we track the development of the assembled macrostructure. As the superballs assemble, we found that they arrange into the predicted paracrystalline, rhombohedral C1-lattice that varies by the constituent superballs' shape. This provides insights in the behavior between confinement and particle shape that can be applied in the development of new functional materials., Comment: 14 pages, 5 figures, supporting info, accepted for publication in JCISOpen

Published
2021

6. Femtosecond laser produced periodic plasma in a colloidal crystal probed by XFEL radiation

Author

Mukharamova, Nastasia, Lazarev, Sergey, Meijer, Janne-Mieke, Gorobtsov, Oleg Yu., Singer, Andrej, Chollet, Matthieu, Bussmann, Michael, Dzhigaev, Dmitry, Feng, Yiping, Garten, Marco, Huebl, Axel, Kluge, Thomas, Kurta, Ruslan P., Lipp, Vladimir, Santra, Robin, Sikorski, Marcin, Song, Sanghoon, Williams, Garth, Zhu, Diling, Ziaja-Motyka, Beata, Cowan, Thomas, Petukhov, Andrei V., and Vartanyants, Ivan A.

Subjects
Condensed Matter - Soft Condensed Matter, Physics - Plasma Physics
Abstract

With the rapid development of short-pulse intense laser sources, studies of matter under extreme irradiation conditions enter further unexplored regimes. In addition, an application of X-ray Free- Electron Lasers (XFELs), delivering intense femtosecond X-ray pulses allows to investigate sample evolution in IR pump - X-ray probe experiments with an unprecedented time resolution. Here we present the detailed study of periodic plasma created from the colloidal crystal. Both experimental data and theory modeling show that the periodicity in the sample survives to a large extent the extreme excitation and shock wave propagation inside the colloidal crystal. This feature enables probing the excited crystal, using the powerful Bragg peak analysis, in contrast to the conventional studies of dense plasma created from bulk samples for which probing with Bragg diffraction technique is not possible. X-ray diffraction measurements of excited colloidal crystals may then lead towards a better understanding of matter phase transitions under extreme irradiation conditions., Comment: 52 pages, 22 figures, 64 references

Published
2019
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7. Femtosecond laser produced periodic plasma in a colloidal crystal probed by XFEL radiation.

Author

Mukharamova, Nastasia, Lazarev, Sergey, Meijer, Janne-Mieke, Gorobtsov, Oleg Yu, Singer, Andrej, Chollet, Matthieu, Bussmann, Michael, Dzhigaev, Dmitry, Feng, Yiping, Garten, Marco, Huebl, Axel, Kluge, Thomas, Kurta, Ruslan P, Lipp, Vladimir, Santra, Robin, Sikorski, Marcin, Song, Sanghoon, Williams, Garth, Zhu, Diling, Ziaja-Motyka, Beata, Cowan, Thomas E, Petukhov, Andrei V, and Vartanyants, Ivan A

Subjects
cond-mat.soft, physics.plasm-ph
Abstract

With the rapid development of short-pulse intense laser sources, studies of matter under extreme irradiation conditions enter further unexplored regimes. In addition, an application of X-ray Free-Electron Lasers (XFELs) delivering intense femtosecond X-ray pulses, allows to investigate sample evolution in IR pump - X-ray probe experiments with an unprecedented time resolution. Here we present a detailed study of the periodic plasma created from the colloidal crystal. Both experimental data and theory modeling show that the periodicity in the sample survives to a large extent the extreme excitation and shock wave propagation inside the colloidal crystal. This feature enables probing the excited crystal, using the powerful Bragg peak analysis, in contrast to the conventional studies of dense plasma created from bulk samples for which probing with Bragg diffraction technique is not possible. X-ray diffraction measurements of excited colloidal crystals may then lead towards a better understanding of matter phase transitions under extreme irradiation conditions.

Published
2020

8. Unravelling structural rearrangement of polymer colloidal crystals under dry sintering conditions

Author

Zozulya, Alexey V., Zaluzhnyy, Ivan A., Mukharamova, Nastasia, Lazarev, Sergey, Meijer, Janne-Mieke, Kurta, Ruslan P., Shabalin, Anatoly, Sprung, Michael, Petukhov, Andrei V., and Vartanyants, Ivan A.

Subjects
Condensed Matter - Soft Condensed Matter
Abstract

Structural rearrangement of polystyrene colloidal crystals under dry sintering conditions has been revealed by in situ grazing incidence X-ray scattering. Measured diffraction patterns were analysed using distorted wave Born approximation (DWBA) theory and the structural parameters of as-grown colloidal crystals of three different particle sizes were determined for in-plane and out-of-plane directions in a film. By analysing the temperature evolution of diffraction peak positions, integrated intensities, and widths the detailed scenario of structural rearrangement of crystalline domains at a nanoscale has been revealed, including thermal expansion, particle shape transformation and crystal amorphisation. Based on DWBA analysis we demonstrate that in the process of dry sintering the shape of colloidal particles in a crystal transforms from a sphere to a polyhedron. Our results deepen the understanding of thermal annealing of polymer colloidal crystals as an efficient route to the design of new nano-materials.

Published
2018

11. Single-orientation colloidal crystals from capillary-action-induced shear.

Author

Orr, Nicholas H. P., Yanagishima, Taiki, Dolbnya, Igor P., Petukhov, Andrei V., and Dullens, Roel P. A.

Subjects
COLLOIDAL crystals, COLLOIDAL suspensions, SMALL-angle scattering, CRYSTAL growth, EPITAXY, CONFOCAL microscopy, CRYSTAL structure
Abstract

We study the crystallization of colloidal dispersions under capillary-action-induced shear as the dispersion is drawn into flat walled capillaries. Using confocal microscopy and small angle x-ray scattering, we find that the shear near the capillary walls influences the crystallization to result in large random hexagonal close-packed (RHCP) crystals with long-range orientational order over tens of thousands of colloidal particles. We investigate the crystallization mechanism and find partial crystallization under shear, initiating with hexagonal planes at the capillary walls, where shear is highest, followed by epitaxial crystal growth from these hexagonal layers after the shear is stopped. We then characterize the three-dimensional crystal structure finding that the shear-induced crystallization leads to larger particle separations parallel to the shear and vorticity directions as compared to the equilibrium RHCP structure. Confocal microscopy reveals that competing shear directions, where the capillary walls meet at a corner, create differently oriented hexagonal planes of particles. The single-orientation RHCP colloidal crystals remain stable after formation and are produced without the need of complex shear cell arrangements. [ABSTRACT FROM AUTHOR]

Published
2022
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16. Which Ion Dominates the Temperature and Pressure Response of Halide Perovskites and Elpasolites?

Author

Muscarella, Loreta A., Jöbsis, Huygen J., Baumgartner, Bettina, Prins, P. Tim, Maaskant, D. Nicolette, Petukhov, Andrei V., Chernyshov, Dmitry, McMonagle, Charles J., Hutter, Eline M., Muscarella, Loreta A., Jöbsis, Huygen J., Baumgartner, Bettina, Prins, P. Tim, Maaskant, D. Nicolette, Petukhov, Andrei V., Chernyshov, Dmitry, McMonagle, Charles J., and Hutter, Eline M.

Abstract

Halide perovskites and elpasolites are key for optoelectronic applications due to their exceptional performance and adaptability. However, understanding their crucial elastic properties for synthesis and device operation remains limited. We performed temperature- and pressure-dependent synchrotron-based powder X-ray diffraction at low pressures (ambient to 0.06 GPa) to investigate their elastic properties in their ambient-pressure crystal structure. We found common trends in bulk modulus and thermal expansivity, with an increased halide ionic radius (Cl to Br to I) resulting in greater softness, higher compressibility, and thermal expansivity in both materials. The A cation has a minor effect, and mixed-halide compositions show intermediate properties. Notably, thermal phase transitions in MAPbI3 and CsPbCl3 induced lattice softening and negative expansivity for specific crystal axes, even at temperatures far from the transition point. These results emphasize the significance of considering temperature-dependent elastic properties, which can significantly impact device stability and performance during manufacturing or temperature sweeps.

Published
2023

17. The Formation of NaYF4: Er3+, Yb3+ Nanocrystals Studied by In Situ X-ray Scattering: Phase Transition and Size Focusing

Author

Physical and Colloid Chemistry, Sub Inorganic Chemistry and Catalysis, Sub Condensed Matter and Interfaces, Sub Soft Condensed Matter, Sub Physical and Colloid Chemistry, Inorganic Chemistry and Catalysis, Soft Condensed Matter and Biophysics, Condensed Matter and Interfaces, Prins, P. Tim, van der Bok, Johanna C., van Swieten, Thomas P., Hinterding, Stijn O.M., Smith, Andy J., Petukhov, Andrei V., Meijerink, Andries, Rabouw, Freddy T., Physical and Colloid Chemistry, Sub Inorganic Chemistry and Catalysis, Sub Condensed Matter and Interfaces, Sub Soft Condensed Matter, Sub Physical and Colloid Chemistry, Inorganic Chemistry and Catalysis, Soft Condensed Matter and Biophysics, Condensed Matter and Interfaces, Prins, P. Tim, van der Bok, Johanna C., van Swieten, Thomas P., Hinterding, Stijn O.M., Smith, Andy J., Petukhov, Andrei V., Meijerink, Andries, and Rabouw, Freddy T.

Published
2023

18. Which Ion Dominates the Temperature and Pressure Response of Halide Perovskites and Elpasolites?

Author

Physical and Colloid Chemistry, Inorganic Chemistry and Catalysis, Sub Inorganic Chemistry and Catalysis, Sub Physical and Colloid Chemistry, Muscarella, Loreta A., Jöbsis, Huygen J., Baumgartner, Bettina, Prins, P. Tim, Maaskant, D. Nicolette, Petukhov, Andrei V., Chernyshov, Dmitry, McMonagle, Charles J., Hutter, Eline M., Physical and Colloid Chemistry, Inorganic Chemistry and Catalysis, Sub Inorganic Chemistry and Catalysis, Sub Physical and Colloid Chemistry, Muscarella, Loreta A., Jöbsis, Huygen J., Baumgartner, Bettina, Prins, P. Tim, Maaskant, D. Nicolette, Petukhov, Andrei V., Chernyshov, Dmitry, McMonagle, Charles J., and Hutter, Eline M.

Published
2023

19. Droplet-based assembly of magnetic superballs

Author

Schyck, S.N. (author), Meijer, Janne Mieke (author), Schelling, Max P. (author), Petukhov, Andrei V. (author), Rossi, L. (author), Schyck, S.N. (author), Meijer, Janne Mieke (author), Schelling, Max P. (author), Petukhov, Andrei V. (author), and Rossi, L. (author)

Abstract

The self-assembly of materials driven by the inherent directionality of the constituent particles is of both practical and fundamental interest because it enables the fabrication of complex and hierarchical structures with tailored functionalities. By employing evaporation assisted self-assembly, we form opal-like structures with micro-sized magnetic superball particles. We study the structure formation of different superball shapes during evaporation of a dispersion droplet with in-situ small angle x-ray scattering with microradian resolution in the absence and presence of an external magnetic field. In the absence of a magnetic field, strong shape-dependent structures form as the water evaporates from the system. Applying a magnetic field to the droplet has a unique effect on the system; strong magnetic fields inhibit the growth of well-ordered assemblies due to the formation of out-of-equilibrium dipolar structures while lower magnetic fields allow particles to rearrange and orient without inhibition. In this work, we show how the superball assembly inside a droplet can be controlled by the magnetic field strength and the superball shape. The tunability of these parameters not only enables the controllable formation of macroscopic colloidal assemblies but also opens up possibilities for the development of functional materials with tailored properties on a macro-scale., ChemE/Advanced Soft Matter

Published
2023
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23. The Formation of NaYF4 : Er3+, Yb3+ Nanocrystals Studied by In Situ X‐ray Scattering: Phase Transition and Size Focusing.

Author

Prins, P. Tim, van der Bok, Johanna C., van Swieten, Thomas P., Hinterding, Stijn O. M., Smith, Andy J., Petukhov, Andrei V., Meijerink, Andries, and Rabouw, Freddy T.

Subjects
PHASE transitions, X-ray scattering, SMALL-angle X-ray scattering, NANOCRYSTALS, PARTICLE size distribution, OPTICAL materials
Abstract

β‐NaYF4 nanocrystals are a popular class of optical materials. They can be doped with optically active lanthanide ions and shaped into core‐multi‐shell geometries with controlled dopant distributions. Here, we follow the synthesis of β‐NaYF4 nanocrystals from α‐NaYF4 precursor particles using in situ small‐angle and wide‐angle X‐ray scattering and ex situ electron microscopy. We observe an evolution from a unimodal particle size distribution to bimodal, and eventually back to unimodal. The final size distribution is narrower in absolute numbers than the initial distribution. These peculiar growth dynamics happen in large part before the α‐to‐β phase transformation. We propose that the splitting of the size distribution is caused by variations in the reactivity of α‐NaYF4 precursor particles, potentially due to inter‐particle differences in stoichiometry. Rate equation modeling confirms that a continuous distribution of reactivities can result in the observed particle growth dynamics. [ABSTRACT FROM AUTHOR]

Published
2023
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25. In Situ Optical and X-ray Spectroscopy Reveals Evolution toward Mature CdSe Nanoplatelets by Synergetic Action of Myristate and Acetate Ligands

Author

Bok, Johanna C. van der, Prins, P. Tim, Montanarella, Federico, Maaskant, D. Nicolette, Brzesowsky, Floor A., Sluijs, Maaike M. van der, Salzmann, Bastiaan B. V., Rabouw, Freddy T., Petukhov, Andrei V., Donega, Celso De Mello, Vanmaekelbergh, Daniel, Meijerink, Andries, Sub Inorganic Chemistry and Catalysis, Sub Condensed Matter and Interfaces, Sub Soft Condensed Matter, Sub Physical and Colloid Chemistry, Physical and Colloid Chemistry, Sub Inorganic Chemistry and Catalysis, Sub Condensed Matter and Interfaces, Sub Soft Condensed Matter, Sub Physical and Colloid Chemistry, Physical and Colloid Chemistry, and Physical Chemistry

Subjects
Myristates, Organic Compounds, Quantum dots, Spectrum Analysis, X-Rays, Cadmium selenide, General Chemistry, Acetates, Ligands, Myristic Acid, Biochemistry, Catalysis, Scattering, Selenium Compounds/chemistry, Colloid and Surface Chemistry, Solvents, Cadmium Compounds/chemistry, Cadmium
Abstract

The growth of two-dimensional platelets of the CdX family (X = S, Se, or Te) in an organic solvent requires the presence of both long- and short-chain ligands. This results in nanoplatelets of atomically precise thickness and long-chain ligand-stabilized Cd top and bottom surfaces. The platelets show a bright and spectrally pure luminescence. Despite the enormous interest in CdX platelets for optoelectronics, the growth mechanism is not fully understood. Riedinger et al. studied the reaction without a solvent and showed the favorable role for short-chain carboxylates for growth in two dimensions. Their model, based on the total energy of island nucleation, shows favored side facet growth versus growth on the top and bottom surfaces. However, several aspects of the synthesis under realistic conditions are not yet understood: Why are both short- and long-chain ligands required to obtain platelets? Why does the synthesis result in both isotropic nanocrystals and platelets? At which stage of the reaction is there bifurcation between isotropic and 2D growth? Here, we report an in situ study of the CdSe nanoplatelet reaction under practical synthesis conditions. We show that without short-chain ligands, both isotropic and mini-nanoplatelets form in the early stage of the process. However, most remaining precursors are consumed in isotropic growth. Addition of acetate induces a dramatic shift toward nearly exclusive 2D growth of already existing mini-nanoplatelets. Hence, although myristate stabilizes mini-nanoplatelets, mature nanoplatelets only grow by a subtle interplay between myristate and acetate, the latter catalyzes fast lateral growth of the side facets of the mini-nanoplatelets.

Published
2022

26. Self-assembly of colloidal superballs under spherical confinement of a drying droplet

Author

Schyck, S.N. (author), Meijer, Janne Mieke (author), Baldauf, L. (author), Schall, Peter (author), Petukhov, Andrei V. (author), Rossi, L. (author), Schyck, S.N. (author), Meijer, Janne Mieke (author), Baldauf, L. (author), Schall, Peter (author), Petukhov, Andrei V. (author), and Rossi, L. (author)

Abstract

Understanding the relationship between colloidal building block shape and self-assembled material structure is important for the development of novel materials by self-assembly. In this regard, colloidal superballs are unique building blocks because their shape can smoothly transition between spherical and cubic. Assembly of colloidal superballs under spherical confinement results in macroscopic clusters with ordered internal structure. By utilizing Small Angle X-Ray Scattering (SAXS), we probe the internal structure of colloidal superball dispersion droplets during confinement. We observe and identify four distinct drying regimes that arise during compression via evaporating droplets, and we track the development of the assembled macrostructure. As the superballs assemble, we found that they arrange into the predicted paracrystalline, rhombohedral C1-lattice that varies by the constituent superballs’ shape. This provides insights in the behavior between confinement and particle shape that can be applied in the development of new functional materials., ChemE/Advanced Soft Matter

Published
2022
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27. Angular X-ray cross-correlation analysis applied to the scattering data in 3D reciprocal space from a single crystal

Author

Physical and Colloid Chemistry, Sub Physical and Colloid Chemistry, Lapkin, Dmitry, Shabalin, Anatoly, Meijer, Janne-Mieke, Kurta, Ruslan, Sprung, Michael, Petukhov, Andrei V., Vartanyants, Ivan A., Physical and Colloid Chemistry, Sub Physical and Colloid Chemistry, Lapkin, Dmitry, Shabalin, Anatoly, Meijer, Janne-Mieke, Kurta, Ruslan, Sprung, Michael, Petukhov, Andrei V., and Vartanyants, Ivan A.

Published
2022

28. Characterization of hen phosvitin in aqueous salt solutions: Size, structure, and aggregation

Author

Sub Physical and Colloid Chemistry, Physical and Colloid Chemistry, Takeuchi, Machi, Mashima, Tsuyoshi, Sztucki, Michael, Petukhov, Andrei V., Vis, Mark, Friedrich, Heiner, Tuinier, Remco, Sub Physical and Colloid Chemistry, Physical and Colloid Chemistry, Takeuchi, Machi, Mashima, Tsuyoshi, Sztucki, Michael, Petukhov, Andrei V., Vis, Mark, Friedrich, Heiner, and Tuinier, Remco

Published
2022

29. Self-assembly of colloidal superballs under spherical confinement of a drying droplet

Author

Sub Physical and Colloid Chemistry, Physical and Colloid Chemistry, Schyck, Sarah, Meijer, Janne-Mieke, Baldauf, Lucia, Schall, Peter, Petukhov, Andrei V., Rossi, Laura, Sub Physical and Colloid Chemistry, Physical and Colloid Chemistry, Schyck, Sarah, Meijer, Janne-Mieke, Baldauf, Lucia, Schall, Peter, Petukhov, Andrei V., and Rossi, Laura

Published
2022

30. Shape Matters in Magnetic-Field-Assisted Assembly of Prolate Colloids

Author

Sub Physical and Colloid Chemistry, Physical and Colloid Chemistry, Pal, Antara, Filippo, Carlo Andrea De, Ito, Thiago, Kamal, Md Arif, Petukhov, Andrei V., Michele, Cristiano De, Schurtenberger, Peter, Sub Physical and Colloid Chemistry, Physical and Colloid Chemistry, Pal, Antara, Filippo, Carlo Andrea De, Ito, Thiago, Kamal, Md Arif, Petukhov, Andrei V., Michele, Cristiano De, and Schurtenberger, Peter

Published
2022

31. In Situ Optical and X-ray Spectroscopy Reveals Evolution toward Mature CdSe Nanoplatelets by Synergetic Action of Myristate and Acetate Ligands

Author

Sub Inorganic Chemistry and Catalysis, Sub Condensed Matter and Interfaces, Sub Soft Condensed Matter, Sub Physical and Colloid Chemistry, Physical and Colloid Chemistry, Bok, Johanna C. van der, Prins, P. Tim, Montanarella, Federico, Maaskant, D. Nicolette, Brzesowsky, Floor A., Sluijs, Maaike M. van der, Salzmann, Bastiaan B. V., Rabouw, Freddy T., Petukhov, Andrei V., Donega, Celso De Mello, Vanmaekelbergh, Daniel, Meijerink, Andries, Sub Inorganic Chemistry and Catalysis, Sub Condensed Matter and Interfaces, Sub Soft Condensed Matter, Sub Physical and Colloid Chemistry, Physical and Colloid Chemistry, Bok, Johanna C. van der, Prins, P. Tim, Montanarella, Federico, Maaskant, D. Nicolette, Brzesowsky, Floor A., Sluijs, Maaike M. van der, Salzmann, Bastiaan B. V., Rabouw, Freddy T., Petukhov, Andrei V., Donega, Celso De Mello, Vanmaekelbergh, Daniel, and Meijerink, Andries

Published
2022

32. Single-orientation colloidal crystals from capillary-action-induced shear

Author

Orr, Nicholas H.P., Yanagishima, Taiki, Dolbnya, Igor P., Petukhov, Andrei V., Dullens, Roel P.A., Orr, Nicholas H.P., Yanagishima, Taiki, Dolbnya, Igor P., Petukhov, Andrei V., and Dullens, Roel P.A.

Abstract

We study the crystallization of colloidal dispersions under capillary-action-induced shear as the dispersion is drawn into flat walled capillaries. Using confocal microscopy and small angle x-ray scattering, we find that the shear near the capillary walls influences the crystallization to result in large random hexagonal close-packed (RHCP) crystals with long-range orientational order over tens of thousands of colloidal particles. We investigate the crystallization mechanism and find partial crystallization under shear, initiating with hexagonal planes at the capillary walls, where shear is highest, followed by epitaxial crystal growth from these hexagonal layers after the shear is stopped. We then characterize the three-dimensional crystal structure finding that the shear-induced crystallization leads to larger particle separations parallel to the shear and vorticity directions as compared to the equilibrium RHCP structure. Confocal microscopy reveals that competing shear directions, where the capillary walls meet at a corner, create differently oriented hexagonal planes of particles. The single-orientation RHCP colloidal crystals remain stable after formation and are produced without the need of complex shear cell arrangements.

Published
2022

33. In Situ Optical and X-ray Spectroscopy Reveals Evolution toward Mature CdSe Nanoplatelets by Synergetic Action of Myristate and Acetate Ligands

Author

van der Bok, Johanna C., Prins, P. Tim, Montanarella, Federico, Maaskant, D. Nicolette, Brzesowsky, Floor A., van der Sluijs, Maaike M., Salzmann, Bastiaan B.V., Rabouw, Freddy T., Petukhov, Andrei V., De Mello Donega, Celso, Vanmaekelbergh, Daniel, Meijerink, Andries, van der Bok, Johanna C., Prins, P. Tim, Montanarella, Federico, Maaskant, D. Nicolette, Brzesowsky, Floor A., van der Sluijs, Maaike M., Salzmann, Bastiaan B.V., Rabouw, Freddy T., Petukhov, Andrei V., De Mello Donega, Celso, Vanmaekelbergh, Daniel, and Meijerink, Andries

Abstract

The growth of two-dimensional platelets of the CdX family (X = S, Se, or Te) in an organic solvent requires the presence of both long- and short-chain ligands. This results in nanoplatelets of atomically precise thickness and long-chain ligand-stabilized Cd top and bottom surfaces. The platelets show a bright and spectrally pure luminescence. Despite the enormous interest in CdX platelets for optoelectronics, the growth mechanism is not fully understood. Riedinger et al. studied the reaction without a solvent and showed the favorable role for short-chain carboxylates for growth in two dimensions. Their model, based on the total energy of island nucleation, shows favored side facet growth versus growth on the top and bottom surfaces. However, several aspects of the synthesis under realistic conditions are not yet understood: Why are both short- and long-chain ligands required to obtain platelets? Why does the synthesis result in both isotropic nanocrystals and platelets? At which stage of the reaction is there bifurcation between isotropic and 2D growth? Here, we report an in situ study of the CdSe nanoplatelet reaction under practical synthesis conditions. We show that without short-chain ligands, both isotropic and mini-nanoplatelets form in the early stage of the process. However, most remaining precursors are consumed in isotropic growth. Addition of acetate induces a dramatic shift toward nearly exclusive 2D growth of already existing mini-nanoplatelets. Hence, although myristate stabilizes mini-nanoplatelets, mature nanoplatelets only grow by a subtle interplay between myristate and acetate, the latter catalyzes fast lateral growth of the side facets of the mini-nanoplatelets.

Published
2022

36. In Situ Optical and X-ray Spectroscopy Reveals Evolution toward Mature CdSe Nanoplatelets by Synergetic Action of Myristate and Acetate Ligands

Author

van der Bok, Johanna C., primary, Prins, P. Tim, additional, Montanarella, Federico, additional, Maaskant, D. Nicolette, additional, Brzesowsky, Floor A., additional, van der Sluijs, Maaike M., additional, Salzmann, Bastiaan B. V., additional, Rabouw, Freddy T., additional, Petukhov, Andrei V., additional, De Mello Donega, Celso, additional, Vanmaekelbergh, Daniel, additional, and Meijerink, Andries, additional

Published
2022
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37. Block copolymer hierarchical structures from the interplay of multiple assembly pathways

Author

Ianiro, Alessandro, Chi, Meng, Hendrix, Marco M. R. M., Koc, Au Vala, Eren, E. Deniz, Sztucki, Michael, Petukhov, Andrei V., de With, Gijsbertus, Esteves, A. Catarina C., Tuinier, Remco, Physical and Colloid Chemistry, Sub Physical and Colloid Chemistry, Physical and Colloid Chemistry, Sub Physical and Colloid Chemistry, Physical Chemistry, Self-Organizing Soft Matter, Materials and Interface Chemistry, and ICMS Core

Subjects
Copolymer composition, Materials science, Polymers and Plastics, Chemical engineering, law, Organic Chemistry, Copolymer, Hierarchical organization, Bioengineering, Crystallization, Biochemistry, law.invention
Abstract

Structurally complex hierarchical block copolymer assemblies can be formed in solution via the interplay of multiple assembly pathways. Crystallizable block copolymers can undergo self-assembly, crystallization or phase separation in solution. By selecting appropriate solvency conditions (solvent and temperature) it is possible to induce an interplay between these processes resulting in a complex association behavior. This leads to the formation of assemblies with up to four levels of hierarchical organization. Furthermore, varying the copolymer composition enables to tune the formation mechanism and the morphology of the aggregates.

Published
2020

38. Shape Matters in Magnetic-Field-Assisted Assembly of Prolate Colloids

Author

Pal, Antara, Filippo, Carlo Andrea De, Ito, Thiago, Kamal, Md Arif, Petukhov, Andrei V., Michele, Cristiano De, Schurtenberger, Peter, Sub Physical and Colloid Chemistry, Physical and Colloid Chemistry, Sub Physical and Colloid Chemistry, Physical and Colloid Chemistry, and Physical Chemistry

Subjects
small-angle X-ray scattering (SAXS), General Engineering, General Physics and Astronomy, particle shape-analysis, Physics and Astronomy(all), directed self-assembly, liquid crystals, magnetic anisotropic colloids, Monte Carlo (MC) simulation, Materials Science(all), General Materials Science, Engineering(all)
Abstract

An anisotropic colloidal shape in combination with an externally tunable interaction potential results in a plethora of self-assembled structures with potential applications toward the fabrication of smart materials. Here we present our investigation on the influence of an external magnetic field on the self-assembly of hematite-silica core-shell prolate colloids for two aspect ratios ρ = 2.9 and 3.69. Our study shows a rather counterintuitive but interesting phenomenon, where prolate colloids self-assemble into oblate liquid crystalline (LC) phases. With increasing concentration, particles with smaller ρ reveal a sequence of LC phases involving para-nematic, nematic, smectic, and oriented glass phases. The occurrence of a smectic phase for colloidal ellipsoids has been neither predicted nor reported before. Quantitative shape analysis of the particles together with extensive computer simulations indicate that in addition to ρ, a subtle deviation from the ideal ellipsoidal shape dictates the formation of this unusual sequence of field-induced structures. Particles with ρ = 2.9 exhibit a hybrid shape containing features from both spherocylinders and ellipsoids, which make their self-assembly behavior richer than that observed for either of the “pure” shapes. The shape of the particles with higher ρ matches closely with the ideal ellipsoids, as a result their phase behavior follows the one expected for a “pure” ellipsoidal shape. Using anisotropic building blocks and external fields, our study demonstrates the ramifications of the subtle changes in the particle shape on the field-directed self-assembled structures with externally tunable properties.

Published
2022

40. The Analysis of Periodic Order in Monolayers of Colloidal Superballs

Author

Ten Napel, Daniël N., Meijer, Janne Mieke, Petukhov, Andrei V., Sub Physical and Colloid Chemistry, Physical and Colloid Chemistry, Sub Physical and Colloid Chemistry, Physical and Colloid Chemistry, Soft Matter and Biological Physics, Physical Chemistry, Inorganic Materials & Catalysis, Colloidal Soft Matter, and ICMS Core

Subjects
Diffraction, Technology, Materials science, QH301-705.5, Colloidal silica, QC1-999, 02 engineering and technology, Colloidal superballs, Neutron scattering, 010402 general chemistry, 01 natural sciences, Scattering, Materials Science(all), colloidal monolayers, Monolayer, General Materials Science, Biology (General), Instrumentation, QD1-999, Engineering(all), Fluid Flow and Transfer Processes, form factor, Small-angle X-ray scattering, Process Chemistry and Technology, Physics, scattering, General Engineering, Bragg's law, SAXS, 021001 nanoscience & nanotechnology, Engineering (General). Civil engineering (General), Form factor, 0104 chemical sciences, Rubbing, Computer Science Applications, Condensed Matter::Soft Condensed Matter, Chemistry, Chemical physics, colloidal superballs, TA1-2040, 0210 nano-technology, Colloidal monolayers
Abstract

The characterization of periodic order in assemblies of colloidal particles can be complicated by the coincidence of Bragg diffraction peaks of the structure and minima in the form factor of the particles. Here, we demonstrate a general strategy to overcome this problem that is applicable to all low-dimensional structures. This approach is demonstrated in the application of small-angle X-ray scattering (SAXS) for the characterization of monolayers of colloidal silica superballs prepared using the unidirectional rubbing method. In this method, the ordering of the colloidal superballs is achieved by mechanically rubbing them onto a polydimethylsiloxane (PDMS)-coated surface. Using three differently shaped superballs, ranging from spherical to almost cubic, we show that certain Bragg peaks may not appear in the diffraction patterns due to the presence of minima in the form factor. We show that these missing Bragg peaks can be visualized by imaging the colloidal monolayers at various orientations. Moreover, we argue that the same strategy can be applied to other techniques, such as neutron scattering.

Published
2021

41. Extended Nucleation and Superfocusing in Colloidal Semiconductor Nanocrystal Synthesis

Author

Prins, P. Tim, Montanarella, Federico, Dümbgen, Kim, Justo, Yolanda, Van Der Bok, Johanna C., Hinterding, Stijn O.M., Geuchies, Jaco J., Maes, Jorick, De Nolf, Kim, Deelen, Sander, Meijer, Hans, Zinn, Thomas, Petukhov, Andrei V., Rabouw, Freddy T., De Mello Donega, Celso, Vanmaekelbergh, Daniel, Hens, Zeger, Sub Inorganic Chemistry and Catalysis, Sub Condensed Matter and Interfaces, Sub Soft Condensed Matter, Sub Instrumentatie ENG, Sub Instrumentatie GIM, Sub Physical and Colloid Chemistry, Condensed Matter and Interfaces, Inorganic Chemistry and Catalysis, Physical and Colloid Chemistry, Soft Condensed Matter and Biophysics, Physical Chemistry, Sub Inorganic Chemistry and Catalysis, Sub Condensed Matter and Interfaces, Sub Soft Condensed Matter, Sub Instrumentatie ENG, Sub Instrumentatie GIM, Sub Physical and Colloid Chemistry, Condensed Matter and Interfaces, Inorganic Chemistry and Catalysis, Physical and Colloid Chemistry, and Soft Condensed Matter and Biophysics

Subjects
Photoluminescence, Chemistry(all), Dispersity, Nucleation, Bioengineering, quantum dots, 02 engineering and technology, Colloid, Materials Science(all), Taverne, monodisperse, General Materials Science, nucleation and growth, business.industry, Scattering, Mechanical Engineering, General Chemistry, 021001 nanoscience & nanotechnology, Condensed Matter Physics, in-situ analysis, nanocolloids, Semiconductor, Nanocrystal, Quantum dot, Chemical physics, photoluminescence, 0210 nano-technology, business
Abstract

The hot injection synthesis of colloidal semiconductor nanocrystals is renowned for producing nanocolloids with superb size dispersions. Burst nucleation and diffusion-controlled size focusing during growth have been invoked to rationalize this characteristic, yet experimental evidence supporting the pertinence of these concepts is scant. Using a well-established CdSe synthesis followed with in situ X-ray scattering, we show that nucleation is an extended event that overlaps with growth and can last for 15-20% of the reaction time. Moreover, we find that size focusing outpaces predictions of diffusion-limited growth. This observation supports the conclusion that nanocrystal growth is dictated by the surface reactivity, which drops sharply for larger nanocrystals. Kinetic reaction simulations demonstrate this so-called superfocusing can lengthen the nucleation period and promote size-focusing. The finding that narrow size dispersions can emerge from the counteracting effects of extended nucleation and reaction-limited size focusing ushers in an evidence-based perspective that turns hot injection into a rational scheme to produce monodisperse nanocolloids.

Published
2021

42. Depletion-Induced Chiral Chain Formation of Magnetic Spheres

Author

Heijnen, Sandrine M.F., van Vliet, Patrick, Kuipers, Bonny W.M., Philipse, Albert P., Petukhov, Andrei V., Ouhajji, Samia, Sub Physical and Colloid Chemistry, Physical and Colloid Chemistry, Sub Physical and Colloid Chemistry, and Physical and Colloid Chemistry

Subjects
Materials science, genetic structures, chirality, 02 engineering and technology, 01 natural sciences, lcsh:Technology, Colloid, Materials Science(all), General Materials Science, Chirality, Anisotropy, lcsh:Microscopy, lcsh:QC120-168.85, superparamagnetic colloids, chemistry.chemical_classification, lcsh:QH201-278.5, 010405 organic chemistry, lcsh:T, Communication, Isotropy, Polymer, Superparamagnetic colloids, 021001 nanoscience & nanotechnology, equipment and supplies, 0104 chemical sciences, Magnetic field, Condensed Matter::Soft Condensed Matter, Dipole, chemistry, Chemical physics, lcsh:TA1-2040, depletion-interaction, Depletion-interaction, SPHERES, lcsh:Descriptive and experimental mechanics, lcsh:Electrical engineering. Electronics. Nuclear engineering, 0210 nano-technology, lcsh:Engineering (General). Civil engineering (General), lcsh:TK1-9971, human activities, Superparamagnetism
Abstract

Experimental evidence is presented for the spontaneous formation of chiral configurations in bulk dispersions of magnetized colloids that interact by a combination of anisotropic dipolar interactions and isotropic depletion attractions. The colloids are superparamagnetic silica spheres, magnetized and aligned by a carefully tuned uniform external magnetic field; isotropic attractions are induced by using poly(ethylene oxide) polymers as depleting agents. At specific polymer concentrations, sphere chains wind around each other to form helical structures–of the type that previously have only been observed in simulations on small sets of unconfined dipolar spheres with additional isotropic interactions.

Published
2021

43. The analysis of periodic order in monolayers of colloidal superballs

Author

Sub Physical and Colloid Chemistry, Physical and Colloid Chemistry, Ten Napel, Daniël N., Meijer, Janne Mieke, Petukhov, Andrei V., Sub Physical and Colloid Chemistry, Physical and Colloid Chemistry, Ten Napel, Daniël N., Meijer, Janne Mieke, and Petukhov, Andrei V.

Published
2021

44. Depletion-induced chiral chain formation of magnetic spheres

Author

Sub Physical and Colloid Chemistry, Physical and Colloid Chemistry, Heijnen, Sandrine M.F., van Vliet, Patrick, Kuipers, Bonny W.M., Philipse, Albert P., Petukhov, Andrei V., Ouhajji, Samia, Sub Physical and Colloid Chemistry, Physical and Colloid Chemistry, Heijnen, Sandrine M.F., van Vliet, Patrick, Kuipers, Bonny W.M., Philipse, Albert P., Petukhov, Andrei V., and Ouhajji, Samia

Published
2021

45. Extended Nucleation and Superfocusing in Colloidal Semiconductor Nanocrystal Synthesis

Author

Sub Inorganic Chemistry and Catalysis, Sub Condensed Matter and Interfaces, Sub Soft Condensed Matter, Sub Instrumentatie ENG, Sub Instrumentatie GIM, Sub Physical and Colloid Chemistry, Condensed Matter and Interfaces, Inorganic Chemistry and Catalysis, Physical and Colloid Chemistry, Soft Condensed Matter and Biophysics, Prins, P. Tim, Montanarella, Federico, Dümbgen, Kim, Justo, Yolanda, Van Der Bok, Johanna C., Hinterding, Stijn O.M., Geuchies, Jaco J., Maes, Jorick, De Nolf, Kim, Deelen, Sander, Meijer, Hans, Zinn, Thomas, Petukhov, Andrei V., Rabouw, Freddy T., De Mello Donega, Celso, Vanmaekelbergh, Daniel, Hens, Zeger, Sub Inorganic Chemistry and Catalysis, Sub Condensed Matter and Interfaces, Sub Soft Condensed Matter, Sub Instrumentatie ENG, Sub Instrumentatie GIM, Sub Physical and Colloid Chemistry, Condensed Matter and Interfaces, Inorganic Chemistry and Catalysis, Physical and Colloid Chemistry, Soft Condensed Matter and Biophysics, Prins, P. Tim, Montanarella, Federico, Dümbgen, Kim, Justo, Yolanda, Van Der Bok, Johanna C., Hinterding, Stijn O.M., Geuchies, Jaco J., Maes, Jorick, De Nolf, Kim, Deelen, Sander, Meijer, Hans, Zinn, Thomas, Petukhov, Andrei V., Rabouw, Freddy T., De Mello Donega, Celso, Vanmaekelbergh, Daniel, and Hens, Zeger

Published
2021

47. Quantification of the Structure of Colloidal Gas–Liquid Interfaces

Author

Vis, Mark, Brouwer, Kelly J. H., González García, Álvaro, Petukhov, Andrei V., Konovalov, Oleg, Tuinier, Remco, Sub Physical and Colloid Chemistry, and Sub Soft Condensed Matter

Abstract

We have quantified the structure of the colloidal gas–liquid interface using synchrotron X-ray reflectivity measurements on a model colloid–polymer mixture. The interfacial width shows mean-field scaling with the colloid density difference, and the density profiles appear to be monotonic. Furthermore, our measurements allow us to distinguish between different theoretical polymer descriptions commonly used to model colloid–polymer mixtures. Our results highlight the importance of capturing the correct polymer physics in obtaining a quantitative theoretical description of the colloidal gas–liquid interface.

Published
2020

48. Erratum: Block copolymer hierarchical structures from the interplay of multiple assembly pathways (Polymer Chemistry (2020) DOI: 10.1039/d0py00081g)

Author

Ianiro, Alessandro, Chi, Meng, Hendrix, Marco M.R.M., Koç, Ali Vala, Eren, E. Deniz, Sztucki, Michael, Petukhov, Andrei V., De With, Gijsbertus, Esteves, A. Catarina C., Tuinier, Remco, Physical Chemistry, Chemical Engineering and Chemistry, Self-Organizing Soft Matter, Materials and Interface Chemistry, and ICMS Core

Abstract

The authors apologise for the omission of the Acknowledgements section from their original article. The Acknowledgements are as follows: The authors thank the European Synchrotron Radiation Facility (Grenoble, France) for the provision of synchrotron radiation facilities and the ID02 beamline staff for the excellent support. Furthermore, we thank Dr Laura Kollau for help with the DSC measurements, and Dr Mark Vis and Lisa Timmers for help with the SAXS measurements. The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers. aLaboratory.

Published
2020

49. Quantification of the Structure of Colloidal Gas–Liquid Interfaces

Author

Sub Physical and Colloid Chemistry, Sub Soft Condensed Matter, Vis, Mark, Brouwer, Kelly J. H., González García, Álvaro, Petukhov, Andrei V., Konovalov, Oleg, Tuinier, Remco, Sub Physical and Colloid Chemistry, Sub Soft Condensed Matter, Vis, Mark, Brouwer, Kelly J. H., González García, Álvaro, Petukhov, Andrei V., Konovalov, Oleg, and Tuinier, Remco

Published
2020

50. Femtosecond laser produced periodic plasma in a colloidal crystal probed by XFEL radiation

Author

Sub Physical and Colloid Chemistry, Physical and Colloid Chemistry, Mukharamova, Nastasia, Meijer, Janne Mieke, Gorobtsov, Oleg Yu, Singer, Andrej, Chollet, Matthieu, Bussmann, Michael, Dzhigaev, Dmitry, Feng, Yiping, Garten, Marco, Huebl, Axel, Kluge, Thomas, Kurta, Ruslan P., Lipp, Vladimir, Santra, Robin, Sikorski, Marcin, Song, Sanghoon, Williams, Garth, Zhu, Diling, Ziaja-Motyka, Beata, Cowan, Thomas E., Petukhov, Andrei V., Vartanyants, Ivan A., Sub Physical and Colloid Chemistry, Physical and Colloid Chemistry, Mukharamova, Nastasia, Meijer, Janne Mieke, Gorobtsov, Oleg Yu, Singer, Andrej, Chollet, Matthieu, Bussmann, Michael, Dzhigaev, Dmitry, Feng, Yiping, Garten, Marco, Huebl, Axel, Kluge, Thomas, Kurta, Ruslan P., Lipp, Vladimir, Santra, Robin, Sikorski, Marcin, Song, Sanghoon, Williams, Garth, Zhu, Diling, Ziaja-Motyka, Beata, Cowan, Thomas E., Petukhov, Andrei V., and Vartanyants, Ivan A.

Published
2020

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