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Issue 16, 2012
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Si nanotubes and nanospheres with two-dimensional polycrystalline walls

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Abstract

We report on the characteristics of a new class of Si-based nanotubes and spherical nanoparticles synthesized by the dc-arc plasma method in a mixture of argon and hydrogen. These two nanostructures share common properties: they are hollow and possess very thin, highly polycrystalline and mainly oxidized walls. In particular, we get several hints indicating that their walls could constitute only one single Si oxidized layer. Moreover, we find that only the less oxidized nanotubes exhibit locally atomic ordered, snakeskin-like areas which possess a hexagonal arrangement which can be interpreted either as an sp2 or sp3 hybridized Si or Si–H layer. Their ability to not react with oxygen seems to suggest the presence of sp2 configuration or the formation of silicon–hydrogen bonding.

Graphical abstract: Si nanotubes and nanospheres with two-dimensional polycrystalline walls

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Article information


Submitted
16 Apr 2012
Accepted
23 May 2012
First published
25 May 2012

Nanoscale, 2012,4, 5195-5201
Article type
Paper

Si nanotubes and nanospheres with two-dimensional polycrystalline walls

P. Castrucci, M. Diociaiuti, C. M. Tank, S. Casciardi, F. Tombolini, M. Scarselli, M. De Crescenzi, V. L. Mathe and S. V. Bhoraskar, Nanoscale, 2012, 4, 5195
DOI: 10.1039/C2NR30910F

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