CUED Publications database

Investigation of biotin-streptavidin binding interactions using microcantilever sensors

Shu, WM and Laue, ED and Seshia, AA (2007) Investigation of biotin-streptavidin binding interactions using microcantilever sensors. In: UNSPECIFIED pp. 2003-2009..

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Abstract

We report the investigation of biotin-streptavidin binding interactions using microcantilever sensors. A symmetric cantilever construction is employed to minimize the effects of thermal drift and the control of surface chemistry on the backside of the cantilever is demonstrated to reduce the effects of non-specific binding interactions on the cantilever. Three structurally different biotin modified cantilever surfaces are used as a model system to study the binding interaction with streptavidin. The cantilever response to the binding of streptavidin on these biotin sensing monolayers is compared. The lowest detection limit of streptavidin using biotin-HPDP is found to be between 1 and 10 nM limited by the optical measurement setup. Surface characterization using quartz crystal microbalance (QCM) and high-resolution atomic force microscope (AFM) is used to benchmark the cantilever sensor response. In addition, the QCM and AFM studies reveal that the surface density of bound streptavidin on biotin modified surfaces was low, thereby implying that effects other than steric hindrance are responsible for defining cantilever response. (c) 2006 Elsevier B.V. All rights reserved.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Uncontrolled Keywords: DNA PROTEINS hybridization biosensor biotin-streptavidin binding interaction DRIVEN microcantilever NANOMECHANICAL CANTILEVER ARRAY surface stress
Subjects: UNSPECIFIED
Divisions: Div C > Applied Mechanics
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:21
Last Modified: 17 Nov 2014 01:06
DOI: