High resolution surface plasmon resonance spectroscopy

被引：115

作者：

Tao, NJ ^{[1
]}

Boussaad, S ^{[1
]}

Huang, WL ^{[1
]}

Arechabaleta, RA ^{[1
]}

D'Agnese, J ^{[1
]}

机构：

[1] Florida Int Univ, Dept Phys, Miami, FL 33199 USA

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 1999年 / 70卷 / 12期

关键词：

D O I：

10.1063/1.1150128

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A method for detecting surface plasmon resonance with high resolution (similar to 10(-5) degrees or similar to 10(-8) refractive index units) and fast response time (1 mu s) is described. In the method, light is focused through a prism onto a metal film on which molecules to be detected are adsorbed. The total internal reflection of the incident light is collected with a bicell photodetector instead of a single cell or an array of photodetectors that are widely used in previous works. The ratio of the differential signal to the sum signal of the bicell photodetector provides an accurate measurement of shift in surface plasmon resonance angle caused by the adsorption of molecules onto the metal films or by conformational changes in the adsorbed molecules. Using the method, we have studied subtle conformational changes in redox protein, cytochrome c, due to an electron transfer reaction. (C) 1999 American Institute of Physics. [S0034-6748(99)02212-1].

引用

页码：4656 / 4660

页数：5

共 28 条

[1] AN ATOMIC-RESOLUTION ATOMIC-FORCE MICROSCOPE IMPLEMENTED USING AN OPTICAL-LEVER [J].