Ag Nanorods Coated with Ultrathin TiO2 Shells as Stable and Recyclable SERS Substrates

被引：69
|
作者：
Ma, Lingwei [1 ]
Huang, Yu [1 ]
Hou, Mengjing [1 ]
Xie, Zheng [3 ]
Zhang, Zhengjun [2 ]
机构：
[1] Tsinghua Univ, State Key Lab New Ceram & Fine Proc, Sch Mat Sci & Engn, Beijing 100084, Peoples R China
[2] Tsinghua Univ, Key Lab Adv Mat MOE, Sch Mat Sci & Engn, Beijing 100084, Peoples R China
[3] High Tech Inst Xian, Xian 710025, Shannxi, Peoples R China
来源：
SCIENTIFIC REPORTS | 2015年 / 5卷
基金：
中国国家自然科学基金;
关键词：
ATOMIC LAYER DEPOSITION; ENHANCED RAMAN-SPECTROSCOPY; SILVER ISLAND FILMS; PHOTOCATALYTIC ACTIVITY; CHARGE SEPARATION; SURFACE-CHEMISTRY; THIN-FILMS; IN-SITU; NANOPARTICLES; ARRAYS;
D O I：
10.1038/srep15442
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
TiO2-coated Ag nanorods (Ag@TiO2 NRs) have been fabricated as multifunctional surface-enhanced Raman scattering (SERS) substrates. Uniform TiO2 shells could sufficiently protect the internal Ag NRs against oxidation and sulfuration, thus the temporal stability of SERS substrates was markedly improved. Meanwhile, due to the synergetic effect between crystalline TiO2 and Ag, the nanocomposites could clean themselves via photocatalytic degradation of the adsorbed molecules under ultraviolet irradiation and water dilution, making the SERS substrates renewable. Such Ag@TiO2 NRs were shown to serve as outstanding SERS sensors featuring high sensitivity, superior stability and recyclability.
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页数：8
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