Multiscale Self-Assembly of Silicon Quantum Dots into an Anisotropic Three-Dimensional Random Network

Download

Date

2016-03-01

Author

İlday, Serim Kayacan
İlday, Fatih Ömer
Huebner, Rene
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
Turan, Raşit

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

57
views

0
downloads

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.

Subject Keywords

Mechanical Engineering, General Materials Science, Bioengineering, General Chemistry, Condensed Matter Physics

URI

https://hdl.handle.net/11511/35844

Journal

NANO LETTERS

DOI

https://doi.org/10.1021/acs.nanolett.5b05158

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

Heterojunction solar cells with integrated Si and ZnO nanowires and a chalcopyrite thin film KARAAĞAÇ, Hakan; Parlak, Mehmet; YENGEL, Emre; Islam, M. Saif (Elsevier BV, 2013-06-15) ZnO nanowires (NWs) have been successfully synthesized using a hydrothermal technique on both glass and silicon substrates initially coated with a sputtered ZnO thin film layer. Varying ZnO seed layer thicknesses were deposited to determine the effect of seed layer thickness on the quality of ZnO NW growth. The effect of growth time on the formation of ZnO NWs was also studied. Experimental results show that these two parameters have an important effect on formation, homogeneity and vertical orientation of ...
Circumferentially cracked bimaterial hollow cylinder under mechanical and transient thermal loading Kadıoğlu, Fevzi Suat (Informa UK Limited, 2006-12-01) The analytical solution for the problem of a circumferential inner surface crack in an elastic, infinitely long composite hollow cylinder, made of two concentric perfectly bonded transversely isotropic cylinders is considered. Uniform axial loading and thermal loading in the form of a sudden cooling on the inner boundary are considered. Out of 10 material parameters involved, two bimaterial parameters and three material parameters for each layer upon which the stress intensity factor depends under uniform l...
Composition dependency of lattice anisotropy of TlBX2-type chain mixed crystals Hasanlı, Nızamı; Tas, M (Wiley, 2000-01-01) Variation of the lattice parameters of TlTl1-xInxSe2 chain mixed crystals with composition have been studied by X-ray diffraction technique. The lattice anisotropy (c/a) of the TlBX2-type mixed crystals changes linearly with substitution of the atoms located bath at the center and at the vertices of the BX4 tetrahedra. A brief survey of the important features of the effect of isomorphic atom substitution on the lattice anisotropy of TlBX2-type mixed crystals with chain structure has been presented.
Multi-scale characterization of particle clustering in discontinuously reinforced composites CETIN, Arda; Kalkanlı, Ali (Elsevier BV, 2009-06-01) The applicability of a quantitative characterization scheme for cluster detection in particle reinforced composites is discussed. The method considers the pattern from the perspective of individual particles, so that even in a pattern that globally conforms to a random distribution, micro-scale heterogeneities can be detected. The detected clusters are visualized by kernel surfaces. Results indicate that the presented methodology is an effective discriminator of clusters and can successfully be used for qua...
Temperature dependence of magnetic and thermal properties of chiral HyFe and HyMn close to phase transitions by using the Landau mean field model Tari, Ozlem; Yurtseven, Hasan Hamit (Elsevier BV, 2019-04-15) Magnetic and thermal properties of chiral metal formate frameworks (MOFs) of NH2NH3M(HCOO)(3), M = Fe, Mn, namely, HyFe and HyMn are investigated close to phase transitions by using Landau phenomenological model. By expanding the free energy in terms of the order parameter, for magnetic properties the temperature dependence of magnetization and inverse magnetic susceptibility, and for thermal properties the heat capacity and entropy are calculated for chiral HyFe and HyMn close to phase transitions using th...

Citation Formats

S. K. İlday et al., “Multiscale Self-Assembly of Silicon Quantum Dots into an Anisotropic Three-Dimensional Random Network,” NANO LETTERS, pp. 1942–1948, 2016, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/35844.