Porosification-reduced optical trapping of silicon nanostructures

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Wai-Keung To
  • Junxue Fu
  • Xiongbo Yang
  • V. A L Roy
  • Zhifeng Huang

Detail(s)

Original languageEnglish
Pages (from-to)5835-5839
Journal / PublicationNanoscale
Volume4
Issue number19
Publication statusPublished - 2012

Abstract

Metal-assisted chemical etching (MACE) was carried out to fabricate solid silicon nanowires (s-SiNWs) and mesoporous silicon nanowires (mp-SiNWs). Total reflection and transmission were measured using an integrated sphere to study optical properties of the MACE-generated silicon nanostructures. Without NW aggregation, mp-SiNWs vertically standing on a mesoporous silicon layer trap less light than s-SiNWs over a wavelength range of 400-800 nm, owing to porosification-enhanced optical scattering from the rough inner surfaces of the mesoporous silicon skeletons. Porosification substantially weakens the NW mechanical strength; hence the elongated mp-SiNWs aggregate after 30 min etching and deteriorate optical trapping. © 2012 The Royal Society of Chemistry.

Citation Format(s)

Porosification-reduced optical trapping of silicon nanostructures. / To, Wai-Keung; Fu, Junxue; Yang, Xiongbo; Roy, V. A L; Huang, Zhifeng.

In: Nanoscale, Vol. 4, No. 19, 2012, p. 5835-5839.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review