کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9801376 1515481 2005 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Localized surface plasmon resonance based optical biosensor using surface modified nanoparticle layer for label-free monitoring of antigen-antibody reaction
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Localized surface plasmon resonance based optical biosensor using surface modified nanoparticle layer for label-free monitoring of antigen-antibody reaction
چکیده انگلیسی
In recent years, label-free biosensors not requiring external modifications have been receiving intense attention. A label-free optical biosensor, which retains many of the desirable features of conventional surface plasmon resonance (SPR) reflectometry, namely, the ability to monitor the kinetics of biomolecular interactions in real-time without a label has been developed with several important advantages: the biosensor device is easy to fabricate, and simple to implement, requiring only an UV-Vis spectrophotometer or flatbed scanner. Importantly, the label-free optical biosensor can be easily multiplexed to enable high-throughput monitoring of biomolecular interactions in an array-based format. In this research, the development of a localized surface plasmon resonance (LSPR)-based label-free optical biosensor using a surface modified nanoparticle layer is aimed. This optical detection method promises to offer a massively parallel detection capability in a highly miniaturized package. The two-dimensional nanoparticle layer was formed by the surface modified silica nanoparticles. The optical properties and surface analysis of nanoparticle layer substrate were characterized through transmission measurements and atomic force microscopy (AFM). Simultaneously, the nanoparticle layer substrate was applied to the optical LSPR-based biosensor for label-free monitoring of the antigen-antibody reaction. The anti-fibrinogen antibody was immobilized onto the nanoparticle layer substrate surface. Different concentrations of fibrinogen were introduced to the anti-fibrinogen antibody immobilized nanoparticle layer substrate surface, and the change in the absorption spectrum, caused by the antigen-antibody reaction, was observed. By using this anti-fibrinogen antibody immobilized nanoparticle layer substrate; the detection limit of this optical LSPR-based biosensor was 10 ng/ml.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science and Technology of Advanced Materials - Volume 6, Issue 5, July 2005, Pages 491-500
نویسندگان
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