4.7 Article

Electrochemical synthesis of ZnO nanoflowers and nanosheets on porous Si as photoelectric materials

期刊

APPLIED SURFACE SCIENCE
卷 257, 期 10, 页码 4643-4649

出版社

ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2010.12.108

关键词

ZnO; Si; PS; Electrodeposition; OCP; Band gap

资金

  1. National Natural Science Foundation of China [20775030]

向作者/读者索取更多资源

Well-aligned ZnO nanoflowers and nanosheets were synthesized on porous Si (PS) at different applied potentials by electrodeposition approach. The deposits were grown using the optimized program and were characterized by means of cyclic voltammetry (CV), amperometry I-t (I-t), open-circuit potentiometry. X-ray diffraction (XRD) analysis proved a strong preferential orientation (1 0 0) on PS. Scanning electronic microscopy (SEM) observation showed the deposits consist of nanoflowers with uniform grain size of about 100nm in diameter and nanosheets, which may have potential applications in nanodevices and nanotechnologies. Thus, ZnO grown on PS can be used as photoelectric materials due to its larger photoelectric effect compared to Si wafer according to open-circuit potential (OCP) study. Optical band gap measurements were made on samples using UV-visible spectrophotometer thus giving a band gap of 3.35 eV. (C) 2010 Elsevier B.V. All rights reserved.

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