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Atomic force microscopy characterization of a microcontact printed, self-assembled thiol monolayer for use in biosensors

Caballero, D, Pla-Roca, M, Bessueille, F, Mills, CA, Samitier, J and Errachid, A (2006) Atomic force microscopy characterization of a microcontact printed, self-assembled thiol monolayer for use in biosensors In: Biosensors for Food Safety and Environment Monitoring, 2005-11-10 - 2005-11-12, Agadir, Morocco.

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Abstract

This paper describes friction experiments and pull-off force measurements using atomic force microscopy (AFM), between a nonfunctionalized silicon probe and a 2.5 μm diameter CH and COOH terminated thiol self-assembled monolayer pattern. The pattern is microcontact printed onto a gold-coated silicon wafer, in air, at room temperature, with a relative humidity around 30%, and used to examine probe-monolayer interactions. Atomic force microscopy imaging reveals that the patterns have been successfully reproduced on the substrate surface. We obtained force values of (8.67±2.60)·10 N, (2.68±1.09)·10 N, and (4.60±0.24)·10 N for CH terminated alkyl-thiol, COOH terminated thiol, and gold substrate respectively. Normalizing these values with the tip radius we obtained (0.87±0.27) N/m for CH terminated alkyl-thiol, (2.68±1.10) N/m for COOH terminated thiol, and (4.60±2.50) N/m for bare gold. These interactions are discussed in terms of the chemical affinity between the probe and the substrate. Copyright © Taylor & Francis Group, LLC.

Item Type: Conference or Workshop Item (Conference Paper)
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering > Advanced Technology Institute > Nano-Electronics Centre
Authors :
AuthorsEmailORCID
Caballero, DUNSPECIFIEDUNSPECIFIED
Pla-Roca, MUNSPECIFIEDUNSPECIFIED
Bessueille, FUNSPECIFIEDUNSPECIFIED
Mills, CAUNSPECIFIEDUNSPECIFIED
Samitier, JUNSPECIFIEDUNSPECIFIED
Errachid, AUNSPECIFIEDUNSPECIFIED
Date : 2006
Identification Number : 10.1080/00032710600714014
Contributors :
ContributionNameEmailORCID
PublisherTaylor and Francis, UNSPECIFIEDUNSPECIFIED
Additional Information : "This is an Author's Accepted Manuscript of an article published in Analytical Letters 39 (8),2006. Copyright Taylor & Francis, available online at: http://www.tandfonline.com/doi/abs/10.1080/00032710600714014
Depositing User : Symplectic Elements
Date Deposited : 04 Nov 2013 17:02
Last Modified : 09 Jun 2014 13:33
URI: http://epubs.surrey.ac.uk/id/eprint/804159

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