공명각 및 반사광 측정 모드에서 다양한 물질 구성의 표면 플라즈몬 공명 센서 칩의 민감도 특성
A Study on the Sensitivity of Surface Plasmon Resonance Sensor Chips with Various Material Configurations in Angle and Intensity Detection Modes
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Characteristics of various material surface plasmon resonance (SPR) chips were investigated in angular interrogation mode and inten- sity 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 thechange of their reflectance curves according to refractive index change from 1.331 to 1.335. Most of SPR chips with various con-figurations 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 vari- ation 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.
Abstract
Characteristics of various material surface plasmon resonance (SPR) chips were investigated in angular interrogation mode and inten- sity 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 thechange of their reflectance curves according to refractive index change from 1.331 to 1.335. Most of SPR chips with various con-figurations 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 vari- ation 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.
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