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Your search keyword '"Pokroy, Boaz"' showing total 13 results
Start Over Author "Pokroy, Boaz" Journal crystal growth & design
13 results on '"Pokroy, Boaz"'

5. Colloidal Synthesis of (PbBr2)2(AMTP)2PbBr4a Periodic Perovskite “Heterostructured” Nanocrystal

Author

Massasa, Emma H., Kortstee, Lotte T. J., Lifer, Rachel, Shaek, Saar, Pokroy, Boaz, Castelli, Ivano E., and Bekenstein, Yehonadav

Abstract

Heterostructures in nanoparticles challenge our common understanding of interfaces due to quantum confinement and size effects, giving rise to synergistic properties. An alternating heterostructure in which multiple and reoccurring interfaces appear in a single nanocrystal is hypothesized to accentuate such properties. We present a colloidal synthesis for perovskite layered heterostructure nanoparticles with a (PbBr2)2(AMTP)2PbBr4composition. By varying the synthetic parameters, such as synthesis temperature, solvent, and selection of precursors, we control particle size, shape, and product priority. The structures are validated by X-ray and electron diffraction techniques. The heterostructure nanoparticles’ main optical feature is a broad emission peak, showing the same range of wavelengths compared to the bulk sample.

Published
2024
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13. Effect of Surface Chemistry on Incorporation of Nanoparticles within Calcite Single Crystals

Author

Iryna Polishchuk, Joanna Aizenberg, Giulia Magnabosco, Luca Prodi, Enrico Rampazzo, Francesco Palomba, Giuseppe Falini, Boaz Pokroy, Magnabosco, Giulia, Polishchuk, Iryna, Palomba, Francesco, Rampazzo, Enrico, Prodi, Luca, Aizenberg, Joanna, Pokroy, Boaz, and Falini, Giuseppe

Subjects
Surface (mathematics), Calcite, Condensed Matter - Materials Science, 010405 organic chemistry, Chemistry, Materials Science (cond-mat.mtrl-sci), FOS: Physical sciences, Nanoparticle, Applied Physics (physics.app-ph), Physics - Applied Physics, General Chemistry, 010402 general chemistry, Condensed Matter Physics, 01 natural sciences, 0104 chemical sciences, calcite, PluS nanoparticles, single crystal composite, chemistry.chemical_compound, Chemical engineering, General Materials Science, Inorganic matrix, Inclusion (mineral)
Abstract

Inclusion of additives into calcite crystals allows one to embed non-native proprieties into the inorganic matrix and obtain new functional materials. Up to now, few parameters have been taken into account to evaluate the efficiency of inclusion of an additive. Taking inspiration from Nature, we grew calcite crystals in the presence of fluorescent silica nanoparticles carrying different functional groups (PluS-X) to investigate the effect of surface chemistry on the inclusion of additives. PluS-X allowed us to keep constant all the particle characteristics, including size and morphology, while changing exposed functional groups and thus zeta potential. The effect on crystal morphology and structure, the loading, and distribution of PluS-X within the crystals have been evaluated with different microscopy and diffractometric techniques. Our data indicate that hydroxyl functionalized particles are entrapped more efficiently inside calcite single crystals without distortion of the crystal structure and inhibition of the growth.

Published
2019

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