Issue 4, 2008

Singular MoS2, SiO2 and Si nanostructures—synthesis by solar ablation

Abstract

Solar ablation creates the sharp radiative and temperature gradients, as well as the high-temperature annealing environment, that favor nanomaterial syntheses. Using highly concentrated sunlight, we generated fullerene-like MoS2, ranging from single-walled nanotubes and closed-cage structures to their larger multi-walled counterparts. TEM, HRTEM and EDS unambiguously established the nanostructures, some achieving fundamentally minimum sizes predicted by molecular structural theory. Irradiation of MoS2 and powdered mixtures of MoS2 + SiO2 in evacuated quartz ampoules also generated nanofibers and nanospheres of amorphous SiO2: the first production of SiO2nanostructures purely from quartz. Also, solar ablation of MoS2 + SiO mixtures produced nanowires and nanospheres of crystalline Si.

Graphical abstract: Singular MoS2, SiO2 and Si nanostructures—synthesis by solar ablation

Article information

Article type
Paper
Submitted
12 Sep 2007
Accepted
20 Nov 2007
First published
29 Nov 2007

J. Mater. Chem., 2008,18, 458-462

Singular MoS2, SiO2 and Si nanostructures—synthesis by solar ablation

J. M. Gordon, E. A. Katz, D. Feuermann, A. Albu-Yaron, M. Levy and R. Tenne, J. Mater. Chem., 2008, 18, 458 DOI: 10.1039/B714108D

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