Abstract
The ordered Ag nanorod (AgNR) arrays are fabricated through a simple electroless deposition technique using the isolated Si nanowire (SiNW) arrays as the Ag-grown scaffold. The AgNR arrays have the single-crystallized structure and the plasmonic crystal feature. It is found that the formation of the AgNR arrays is strongly dependent on the filling ratio of SiNWs. A mechanism is proposed based on the selective nucleation and the synergistic growth of Ag nanoparticles on the top of the SiNWs. Moreover, the special AgNR arrays grown on the substrate of SiNWs exhibit a detection sensitivity of 10−15M for rhodamine 6G molecules, which have the potential application to the highly sensitive surface-enhanced Raman scattering sensors.
Highlights
The ordered Ag nanorod (AgNR) arrays are fabricated through a simple electroless deposition technique using the isolated Si nanowire (SiNW) arrays as the Ag-grown scaffold
The special AgNR arrays grown on the substrate of SiNWs exhibit a detection sensitivity of 10−15M for rhodamine 6G molecules, which have the potential application to the highly sensitive surface-enhanced Raman scattering sensors
When the growth time is increased to 30 s, the ordered AgNR arrays are formed on the SiNW arrays (Fig. 2(c)). These results suggest that the substrate of SiNW arrays provides a template to grow the ordered AgNR arrays
Summary
Fan Bai,[1,2] Meicheng Li,1,3,a Pengfei Fu,[1] Ruike Li,[1] Tiansheng Gu,[1] Rui Huang,[1] Zhao Chen,[1] Bing Jiang,[1] and Yingfeng Li1 1State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China 2National Quality Supervision and Inspection Center for Non-ferrous Metals Produces, Yunnan Institute of Products Quality Supervision and Inspection, Kunming 650223, China 3Chongqing Materials Research Institute, Chongqing 400707, China (Received 7 March 2015; accepted 30 April 2015; published online 11 May 2015) It is found that the formation of the AgNR arrays is strongly dependent on the filling ratio of SiNWs. A mechanism is proposed based on the selective nucleation and the synergistic growth of Ag nanoparticles on the top of the SiNWs. the special AgNR arrays grown on the substrate of SiNWs exhibit a detection sensitivity of 10−15M for rhodamine 6G molecules, which have the potential application to the highly sensitive surface-enhanced Raman scattering sensors.
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