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Paper
J. Mater. Chem., 2008, 18, 458 - 462, DOI: 10.1039/b714108d
Singular MoS2, SiO2 and Si nanostructures—synthesis by solar ablation
Jeffrey M. Gordon, Eugene A. Katz, Daniel Feuermann, Ana Albu-Yaron, Moshe Levy and Reshef Tenne
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 SiO2 nanostructures purely from quartz. Also, solar ablation of MoS2 + SiO mixtures produced nanowires and nanospheres of crystalline Si.
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