期刊
ACS APPLIED MATERIALS & INTERFACES
卷 5, 期 12, 页码 5856-5860出版社
AMER CHEMICAL SOC
DOI: 10.1021/am401528w
关键词
pH sensor; fluorescence enhancement; HPTS; Ag nanoparticle; plasmon resonance; core-shell
资金
- National Medical Research Council from Singapore [NMRC/EDG/1060/2012]
We have demonstrated a novel method for the preparation of a fluorescence-based pH sensor by combining the plasmon resonance band of Ag core and pH sensitive dye (HPTS). A thickness-variable silica shell is placed between Ag core and HPTS dye to achieve the maximum fluorescence enhancement. At the shell thickness of 8 nm, the fluorescence intensity increases 4 and 9 times when the sensor is excited at 405 and 455 nm, respectively. At the same time, the fluorescence intensity shows a good sensitivity toward pH value in the range of 5-9, and the ratio of emission intensity at 513 nm excited at 455 nm to that excited at 405 nm versus the pH value in the range of 5-9 is determined. It is believed that the present pH sensor has the potential for determining pH real time in the biological sample.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据