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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Dickherber, Anthony Corso, Christopher D. Hunt, William D. |
| Description | Country affiliation: United States Author Affiliation: Corso CD ( Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.) |
| Abstract | One critical aspect for the development of label-free immunosensors is the employment of highly uniform and repeatable antibody immobilization techniques. In this study, we investigated the use of two different silane molecules (3-glycidyloxypropyl)trimethoxysilane (GPS), and (3-mercaptopropyl)trimethoxysilane (MTS) for the immobilization of fluorescently labeled IgG antibodies on planar ZnO surfaces. The chemical modification of the surfaces was investigated using water contact angle measurements, AFM, and fluorescence microscopy. The results of the water contact angle measurements indicate increased surface hydrophobicity after treatment with GPS and MTS as compared to the control. Surface modification was further verified through AFM measurements which demonstrate an increased surface roughness and particle height after treatment with antibodies. The results of the fluorescence studies indicate that the immobilization protocol employing MTS produced 21% higher fluorescence on average with greater uniformity than the GPS-based protocol, which indicates a higher overall density in antibody coverage on the surface of the ZnO. Acoustic sensor tests were employed to confirm the functionality of sensors treated with the MTS protocol. The results indicate that the immobilization protocol imparts sensitivity and specificity to the ZnO-based devices. |
| ISSN | 09565663 |
| Issue Number | 4 |
| Volume Number | 24 |
| e-ISSN | 18734235 |
| Journal | Biosensors and Bioelectronics |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2008-12-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Antibodies Chemistry Biosensing Techniques Instrumentation Immunoassay Immunoglobulin G Analysis Organic Chemicals Silanes Zinc Oxide Methods Equipment Design Equipment Failure Analysis Reproducibility Of Results Sensitivity And Specificity Surface Properties Evaluation Studies Journal Article Research Support, Non-u.s. Gov't Research Support, U.s. Gov't, Non-p.h.s. Discipline Biotechnology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Nanoscience and Nanotechnology Medicine Biophysics Biomedical Engineering Biotechnology Electrochemistry |
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