Induced pH-dependent shift by local surface plasmon resonance in functionalized gold nanorods

被引：12
作者：
Toh, Yon-Rui [1 ]
Yu, Pyng [1 ]
Wen, Xiaoming [1 ]
Tang, Jau [1 ]
Hsieh, Tao-shih [2 ]
机构：
[1] Acad Sinica, Res Ctr Appl Sci, Taipei 115, Taiwan
[2] Acad Sinica, Inst Cellular & Organism Biol, Taipei 115, Taiwan
来源：
NANOSCALE RESEARCH LETTERS | 2013年 / 8卷
关键词：
Gold nanorods; pH sensor; LSPR; 11-mercaptoundecanoic acid; LIVE CELLS; SILVER NANOPARTICLES; AU NANORODS; FLUORESCENCE;
D O I：
10.1186/1556-276X-8-103
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Localized surface plasmon resonance (LSPR) spectroscopy of metallic nanoparticles is a powerful tool for chemical and biological sensing experiments. In this study, we observed LSPR shifts of 11-mercaptoundecanoic acid modified gold nanorods (GNR-MUA) for the pH range of 6.41 to 8.88. We proposed a mechanism involving changes of the dipole moment after protonation/deprotonation carboxylic groups of 11-mercaptoundecanoic acid (MUA) which plays an important role by modulating LSPR around the functionalized GNR. Such a stable and easily prepared GNR-MUA has potential to become one of the most efficient and promising pH nanosensors to study intra- or extra-cellular pH in a wide range of chemical or biological systems.
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页码：1 / 7
页数：7
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