Improved Sensitivity of Localized Surface Plasmon Resonance Transducers Using Reflection Measurements

被引：28
作者：
Kedem, Ofer [1 ]
Vaskevich, Alexander [1 ]
Rubinstein, Israel [1 ]
机构：
[1] Weizmann Inst Sci, Dept Mat & Interfaces, IL-76100 Rehovot, Israel
来源：
JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2011年 / 2卷 / 10期
基金：
以色列科学基金会;
关键词：
GOLD ISLAND FILMS; NANOPARTICLES; SPECTROSCOPY; SCATTERING; POLYMER; ABSORPTION; BIOSENSOR; SENSORS; PROTEIN; DESIGN;
D O I：
10.1021/jz200482f
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The refractive index sensitivity (RIS) of a localized surface plasmon resonance (LSPR) transducer is one of the key parameters determining its effectiveness in sensing applications. LSPR spectra of nanoparticulate gold films, including Au island films prepared by evaporation on glass and annealing as well as immobilized Au nanoparticle (NP) films, were measured in the transmission and reflection modes. It is shown that the RIS, measured as the wavelength shift in solvents with varying refractive index (RI), is significantly higher in reflection measurements.
引用
收藏
页码：1223 / 1226
页数：4
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