Fabrication and SERS performance of silver-nanoparticle-decorated Si/ZnO nanotrees in ordered arrays.
Highly ordered treelike Si/ZnO hierarchical nanostructures are successfully prepared in a large scale by combining two common techniques, viz., photolithography-assisted wafer-scale fabrication of Si nanopillars and bottom-up hydrothermal growth of ZnO nanorods. Silver nanoparticles are decorated onto the nanotrees by photochemical reduction and deposition. The Si/ZnO/Ag hybrid nanotrees are employed as SERS-active substrates, which exhibit good performance in terms of high sensitivity and good reproducibility. In addition to the SERS application, such ordered Si/ZnO arrays might also find potential applications in light-emitting diodes and solar cells.
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371 Singapore.
Chuanwei
C
Cheng
Bin
B
Yan
She Mein
SM
Wong
Xianglin
X
Li
Weiwei
W
Zhou
Ting
T
Yu
Zexiang
Z
Shen
Hongyu
H
Yu
Hong Jin
HJ
Fan
D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure*; D012825:Silicon / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D013059:Spectrum Analysis, Raman / Q000379:methods; D015034:Zinc Oxide / Q000737:chemistry*
D012834:Silver; D015034:Zinc Oxide; D012825:Silicon