Rapid redox based transformation of metallic nanoparticles on photocatalytic silicon nanostructures

Hyunjong Jin, Te Wei Chang, G. Logan Liu

Research output: Contribution to journalArticle

Abstract

The rapid transformation and synthesis of metal nanoparticles which reaction completes within 5 min by a photocatalytic nanostructured silicon (Si) surface is studied. The Si substrate provides excess electric carriers to the surface upon optical illumination, directly inducing redox reaction. Spherical silver (Ag) nanoparticles transform into prism shape in less than 5 min with only water and room light illumination. Direct synthesis of gold (Au) nanoparticles from gold chloride (AuCl3) solution is also demonstrated. The size and distribution of the Au nanoparticles are controlled primarily by the concentration of the applied gold chloride solution. The rapid direct redox reaction capability shown from the Ag and Au nanoparticle experiments opens additional applications for the proposed photocatalytic device.

Original languageEnglish (US)
Article number243116
JournalApplied Physics Letters
Volume104
Issue number24
DOIs
StatePublished - Jun 16 2014

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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