A silicon-based two-dimensional chalcogenide: growth of Si₂Te₃ nanoribbons and nanoplates

Nano Letters
Sean KeuleyanKristie J Koski

Abstract

We report the synthesis of high-quality single-crystal two-dimensional, layered nanostructures of silicon telluride, Si2Te3, in multiple morphologies controlled by substrate temperature and Te seeding. Morphologies include nanoribbons formed by VLS growth from Te droplets, vertical hexagonal nanoplates through vapor-solid crystallographically oriented growth on amorphous oxide substrates, and flat hexagonal nanoplates formed through large-area VLS growth in liquid Te pools. We show the potential for doping through the choice of substrate and growth conditions. Vertical nanoplates grown on sapphire substrates, for example, can incorporate a uniform density of Al atoms from the substrate. We also show that the material may be modified after synthesis, including both mechanical exfoliation (reducing the thickness to as few as five layers) and intercalation of metal ions including Li(+) and Mg(2+), which suggests applications in energy storage materials. The material exhibits an intense red color corresponding to its strong and broad interband absorption extending from the red into the infrared. Si2Te3 enjoys chemical and processing compatibility with other silicon-based material including amorphous SiO2 but is very chemically sens...Continue Reading

References

Jun 15, 2006·Nano Letters·Suneel KodambakaFrances M Ross
Jan 11, 2007·Nano Letters·Hailin PengYi Cui
Mar 3, 2007·Nature Materials·A K Geim, K S Novoselov
Jul 26, 2008·Nature Nanotechnology·Candace K ChanYi Cui
Mar 17, 2010·Nano Letters·Andrea SplendianiFeng Wang
Feb 1, 2011·Nature Nanotechnology·B RadisavljevicA Kis
Jul 27, 2012·Journal of the American Chemical Society·Kristie J KoskiYi Cui
Oct 13, 2012·Nature·K S NovoselovK Kim
Feb 8, 2013·Nano Letters·Desheng KongYi Cui

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Citations

Mar 1, 2016·Chemical Society Reviews·Zhongying WangRobert Hurt
Nov 10, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Debotra SarkarShigeyoshi Inoue
Jul 20, 2017·Journal of Physics. Condensed Matter : an Institute of Physics Journal·A KandemirH Sahin
Jul 21, 2020·ACS Omega·Romakanta Bhattarai, Xiao Shen
Jul 16, 2019·The Journal of Physical Chemistry Letters·Dongsun Choi, Kwang Seob Jeong
Nov 21, 2020·Inorganic Chemistry·Moushakhi GhoshShabana Khan

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