BIO Web Conf.
Volume 8, 20172016 International Conference on Medicine Sciences and Bioengineering (ICMSB2016)
|Number of page(s)||11|
|Section||Session III: Biomedical Engineering|
|Published online||11 January 2017|
1 Collaborative Innovation Center of Judicial Civilization, China
2 Key Laboratory of Evidence Science, China University of Political Science and Law, Ministry of Education, Beijing 100088, China
3 People’s Public Security University of China, Beijing 100038, China
4 Hong TeCH(Beijing)Co.,Ltd, Beijing, 100021, China
Recently, aptamer-based surface plasmon resonance (SPR) sensors have become increasingly popular due to their high specificity, high sensitivity, real-time detection capabilities, and label-free features. The core component of an aptamer-based SPR sensor is a chip. This paper presents the modification steps and the characterization results of a sensor chip for the construction of a 2, 4, 6-trinitrotoluene-targeted, aptamer-based, SPR sensor. After cleaning the aptamer-based SPR sensor chip, polyethylene glycol (PEG) with functional thiol groups at one end was added to the chip surface by Au-S covalent bonds to form a self-assembled film. Then, the carboxyl groups at the other end of PEG and the carboxyl groups of trinitrophenyl-glycine (TNP-Gly) were activated and connected via ethylenediamine (EDA). This effectively completed the chip’s modification. During the modification process, relevant experimental conditions were optimized. The chip’s surface elements, as well as their chemical states, were characterized by X-ray photoelectron spectroscopy (XPS). The results, outlined in the following study, demonstrate that this modification of an aptamer-based SPR sensor chip adhered to normative expectations. Thus, the modification process proposed here establishes an important foundation for subsequent study of TNT detection.
We are grateful to Humanities and social science research program of China university of politics and law (10ZFQ82009) and Academician Foundation of the Ministry of Public Security of the People’s Republic of China (No. 2011-23214203, 2011-23215243) , Beijing Municipal Education Commission University Science and Technology Park Construction Project (2011-08111603) and Program for Young Innovative Research Team in China University of Political Science and Law (14CXTD04, 16CXTD05) for their financial supports.
© The Authors, published by EDP Sciences, 2017
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