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Published on: March 17, 2023
Bimetallic chips for a surface plasmon resonance instrument.
1Department of Optics and Optical Engineering, Anhui Key Laboratory of Optoelectronic Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China.
Applied Optics
|January 26, 2011
Summary
This study introduces an improved gold/silver bimetallic film for surface plasmon resonance (SPR) instruments, enhancing detection sensitivity and stability for applications like food contamination testing.
Area of Science:
- Analytical Chemistry
- Materials Science
- Biotechnology
Background:
- Surface Plasmon Resonance (SPR) instruments commonly use gold (Au) films as sensing chips.
- Improving the sensitivity and stability of SPR sensing chips is crucial for various analytical applications.
Purpose of the Study:
- To evaluate the performance of a novel Au/Ag bimetallic film as a sensing chip in a commercial SPR instrument (Biacore 3000).
- To assess the applicability and stability of the bimetallic chip for real-time monitoring of biological interactions.
Main Methods:
- Replacement of the standard Au film with an Au/Ag bimetallic film in a Biacore 3000 SPR instrument.
- Real-time monitoring of the binding interaction between sulfamethoxazole (SMX) and anti-SMX to test chip performance.
- Evaluation of chip stability through multiple usage and regeneration cycles.
Main Results:
- The Au/Ag bimetallic chip produced a sharper SPR dip compared to the traditional Au film chip, indicating enhanced sensitivity.
- The bimetallic chip demonstrated stable performance over six cycles of usage and regeneration.
- The chip proved effective for real-time monitoring of SMX and anti-SMX interactions.
Conclusions:
- The Au/Ag bimetallic film is a viable and stable alternative to conventional Au films for SPR sensing chips.
- This enhanced SPR chip technology holds promise for rapid detection of contaminants, such as SMX in food products.
- The study supports the integration of bimetallic films into commercial SPR instruments for broader real-world applications.
