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4. Kinetic Control over Self-Assembly of Semiconductor Nanoplatelets

Author

Momper, Rebecca, primary, Zhang, Heng, additional, Chen, Shuai, additional, Halim, Henry, additional, Johannes, Ewald, additional, Yordanov, Stoyan, additional, Braga, Daniele, additional, Blülle, Balthasar, additional, Doblas, David, additional, Kraus, Tobias, additional, Bonn, Mischa, additional, Wang, Hai I., additional, and Riedinger, Andreas, additional

Published
2020
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5. Kinetic Ionic Permeation and Interfacial Doping of Supported Graphene

Author

Jia, Xiaoyu, primary, Hu, Min, additional, Soundarapandian, Karuppasamy, additional, Yu, Xiaoqing, additional, Liu, Zhaoyang, additional, Chen, Zongping, additional, Narita, Akimitsu, additional, Müllen, Klaus, additional, Koppens, Frank H. L., additional, Jiang, Jun, additional, Tielrooij, Klaas-Jan, additional, Bonn, Mischa, additional, and Wang, Hai I., additional

Published
2019
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8. Multiscale Self-Assembly of Silicon Quantum Dots into an Anisotropic Three-Dimensional Random Network

Author

Ilday, Serim, primary, Ilday, F. Ömer, additional, Hübner, René, additional, Prosa, Ty J., additional, Martin, Isabelle, additional, Nogay, Gizem, additional, Kabacelik, Ismail, additional, Mics, Zoltan, additional, Bonn, Mischa, additional, Turchinovich, Dmitry, additional, Toffoli, Hande, additional, Toffoli, Daniele, additional, Friedrich, David, additional, Schmidt, Bernd, additional, Heinig, Karl-Heinz, additional, and Turan, Rasit, additional

Published
2016
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9. Controlled Folding of Graphene: GraFold Printing

Author

Hallam, Toby, primary, Shakouri, Amir, additional, Poliani, Emanuele, additional, Rooney, Aidan P., additional, Ivanov, Ivan, additional, Potie, Alexis, additional, Taylor, Hayden K., additional, Bonn, Mischa, additional, Turchinovich, Dmitry, additional, Haigh, Sarah J., additional, Maultzsch, Janina, additional, and Duesberg, Georg S., additional

Published
2015
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15. Anomalous Independence of Multiple Exciton Generation on Different Group IV−VI Quantum Dot Architectures

Author

Trinh, M. Tuan, primary, Polak, Leo, additional, Schins, Juleon M., additional, Houtepen, Arjan J., additional, Vaxenburg, Roman, additional, Maikov, Georgy I., additional, Grinbom, Gal, additional, Midgett, Aaron G., additional, Luther, Joseph M., additional, Beard, Matthew C., additional, Nozik, Arthur J., additional, Bonn, Mischa, additional, Lifshitz, Efrat, additional, and Siebbeles, Laurens D. A., additional

Published
2011
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19. Multiscale Self-Assembly of Silicon Quantum Dots into an Anisotropic Three-Dimensional Random Network

Author

Daniele Toffoli, Karl-Heinz Heinig, Hande Toffoli, David Friedrich, Dmitry Turchinovich, Ismail Kabacelik, Bernd Schmidt, Ty J. Prosa, Serim Ilday, Rasit Turan, I. Martin, Zoltan Mics, Gizem Nogay, René Hübner, F. Ömer Ilday, Mischa Bonn, Ilday, Serim, Ilday, F. Ömer, Hübner, René, Prosa, Ty J., Martin, Isabelle, Nogay, Gizem, Kabacelik, Ismail, Mics, Zoltan, Bonn, Mischa, Turchinovich, Dmitry, Toffoli, Hande, Toffoli, Daniele, Friedrich, David, Schmidt, Bernd, Heinig, Karl Heinz, and Turan, Rasit

Subjects
Materials science, hierarchical, multiscale, random network, self-assembly, Si, stochastic deposition, Condensed Matter Physics, Bioengineering, Chemistry (all), Materials Science (all), Mechanical Engineering, Silicon, chemistry.chemical_element, 02 engineering and technology, Condensed Matter Physic, 010402 general chemistry, 01 natural sciences, General Materials Science, Statistical physics, Anisotropy, Random graph, Interconnection, business.industry, General Chemistry, Modular design, Physik (inkl. Astronomie), 021001 nanoscience & nanotechnology, 0104 chemical sciences, Universality (dynamical systems), chemistry, Proof of concept, 0210 nano-technology, business, Material properties
Abstract

Multiscale self-assembly is ubiquitous in nature but its deliberate use to synthesize multifunctional three-dimensional materials remains rare, partly due to the notoriously difficult problem of controlling topology from atomic to macroscopic scales to obtain intended material properties. Here, we propose a simple, modular, noncolloidal methodology that is based on exploiting universality in stochastic growth dynamics and driving the growth process under far-from-equilibrium conditions toward a preplanned structure. As proof of principle, we demonstrate a confined-but-connected solid structure, comprising an anisotropic random network of silicon quantum-dots that hierarchically self-assembles from the atomic to the microscopic scales. First, quantum-dots form to subsequently interconnect without inflating their diameters to form a random network, and this network then grows in a preferential direction to form undulated and branching nanowire-like structures. This specific topology simultaneously achieves two scale-dependent features, which were previously thought to be mutually exclusive: good electrical conduction on the microscale and a bandgap tunable over a range of energies on the nanoscale. © 2016 American Chemical Society.

Published
2016

20. Anomalous independence of multiple exciton generation on different group IV-VI quantum dot architectures.

Author

Trinh MT, Polak L, Schins JM, Houtepen AJ, Vaxenburg R, Maikov GI, Grinbom G, Midgett AG, Luther JM, Beard MC, Nozik AJ, Bonn M, Lifshitz E, and Siebbeles LD

Subjects
Equipment Design, Equipment Failure Analysis, Light, Scattering, Radiation, Lead chemistry, Quantum Dots, Selenium Compounds chemistry
Abstract

Multiple exciton generation (MEG) in PbSe quantum dots (QDs), PbSe(x)S(1-x) alloy QDs, PbSe/PbS core/shell QDs, and PbSe/PbSe(y)S(1-y) core/alloy-shell QDs was studied with time-resolved optical pump and probe spectroscopy. The optical absorption exhibits a red-shift upon the introduction of a shell around a PbSe core, which increases with the thickness of the shell. According to electronic structure calculations this can be attributed to charge delocalization into the shell. Remarkably, the measured quantum yield of MEG, the hot exciton cooling rate, and the Auger recombination rate of biexcitons are similar for pure PbSe QDs and core/shell QDs with the same core size and varying shell thickness. The higher density of states in the alloy and core/shell QDs provide a faster exciton cooling channel that likely competes with the fast MEG process due to a higher biexciton density of states. Calculations reveal only a minor asymmetric delocalization of holes and electrons over the entire core/shell volume, which may partially explain why the Auger recombination rate does not depend on the presence of a shell.

Published
2011
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