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http://dx.doi.org/10.5369/JSST.2017.26.6.402

A Study on the Sensitivity of Surface Plasmon Resonance Sensor Chips with Various Material Configurations in Angle and Intensity Detection Modes  

Sohn, Young-Soo (Department of Biomedical Engineering, Daegu Catholic Unversity)
Publication Information
Journal of Sensor Science and Technology / v.26, no.6, 2017 , pp. 402-407 More about this Journal
Abstract
Characteristics of various material surface plasmon resonance (SPR) chips were investigated in angular interrogation mode and intensity interrogation mode. Among five metals, silver (Ag), gold (Au), copper (Cu), chromium (Cr) and titanium (Ti), three metals, Ag, Au and Cu were paid attention to since their characteristics can be easily analyzed in angular interrogation mode by investigating the change of their reflectance curves according to refractive index change from 1.331 to 1.335. Most of SPR chips with various configurations showed the similar property in angular interrogation mode. The application of the SPR chip made of Ag, Au and Cu or their combinations depends on their reflectance properties. In intensity interrogation mode, the operation range may be limited since the variation of the intensity was not linearly related to refractive index change ranging from 1.331 to 1.335. However, the SPR chip containing high ratio of Ag may be applicable to high sensitive detection due to their sharp reflectance curves in intensity interrogation mode.
Keywords
Surface plasmon resonance; Angular interrogation mode; Intensity interrogation mode; Sensors; Metal;
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