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Title: Ordered array of gold semishells on TiO2 spheres : an ultrasensitive and recyclable SERS substrate
Authors: Li, Xianglin
Hu, Hailong
Li, Dehui
Shen, Zexiang
Xiong, Qihua
Li, Shuzhou
Fan, Hong Jin
Issue Date: 2012
Source: Li, X., Hu, H., Li, D., Shen, Z., Xiong, Q., Li, S., et al. (2012). Ordered Array of Gold Semishells on TiO2 Spheres: An Ultrasensitive and Recyclable SERS Substrate. ACS Applied Materials & Interfaces, 4(4), 2180-2185.
Series/Report no.: ACS applied materials & interfaces
Abstract: Ordered array of Au semishells on TiO2 spheres with controlled size are prepared by combining the nanosphere self-assembly and atomic layer deposition (ALD). This ordered 2-D structure with designed array of metal nanogaps can be used as an ultrasensitive surface-enhanced Raman scattering (SERS) substrate with high reproducibility and stability. More importantly, the SERS substrates are recyclable, as enabled by their self-cleaning function due to the TiO2 photocatalytic degradation of the target molecules. The high SERS sensitivity and recyclability are demonstrated by the detection of Rhodamine 6G (R6G) and brilliant cresyl blue (BCB) molecules. As both the nanosphere lithography and ALD are scalable processes, such 2-D ordered substrates may find applications in chemical sensing.
ISSN: 1944-8244
DOI: 10.1021/am300189n
Rights: © 2012 American Chemical Society.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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