Journal
JOURNAL OF SOLID STATE CHEMISTRY
Volume 196, Issue -, Pages 596-600Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2012.07.029
Keywords
Porous silicon nanowires; Lightly doped; Room temperature; One-step synthesis; Silver nanoparticles
Funding
- National Natural Science Foundation of China [51172069]
- Ph.D. Programs Foundation of Ministry of Education of China [20110036110006]
- Fundamental Research Funds for the Central Universities [11ZG02]
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One-step synthesis of lightly doped porous silicon nanowire arrays was achieved by etching the silicon wafer in HF/AgNO3/H2O2 solution at room temperature. The lightly doped porous silicon nanowires (pNWs) have circular nanopores on the sidewall, which can emit strong green fluorescence. The surface morphologies of these nanowires could be controlled by simply adjusting the concentration of H2O2, which influences the distribution of silver nanoparticles (Ag NPs) along the nanowire axis. A mechanism based on Ag NPs-induced lateral etching of nanowires was proposed to explain the formation of pNWs. The controllable and widely applicable synthesis of pNWs will open their potential application to nanoscale photoluminescence devices. (C) 2012 Elsevier Inc. All rights reserved.
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