Departmental Papers (MSE)
Document Type
Conference Paper
Date of this Version
December 2002
Abstract
There has been much recent interest in polysaccharide coatings for biotechnology applications. We obtained highly wettable dextran coatings applied to flat silicon wafer surfaces through a two-step process: in the first step, the silicon is aminated by the deposition of a selfassembled monolayer of 3-aminopropyltriethoxysilane (APTES); in the second step, polydisperse and low dispersity dextrans with molecular weights ranging from 1 kDa to 100 kDa are covalently grafted along the backbone to the surface amino groups to achieve strong interfacial anchoring. The effect of dextran concentration on film thickness and contact angle is investigated. Atomic force microscopy (AFM) has been employed to characterize surface roughness and coverage of the dextrans as well as the APTES monolayers. The synthetic surfaces were also tested for gas bubble adhesion properties.
Keywords
physical adhesion, contact angle, self-assembled monolayers, surface roughness, wetting
Date Posted: 14 October 2004
This document has been peer reviewed.
Comments
Copyright Materials Research Society. Reprinted from MRS Proceedings Volume 734.
2002 Fall Meeting Symposium B (Joint Proceedings with A)
Symposium Title: Polymer/Metal Interfaces--Fundamentals, Properties and Applications
Proceedings Title: Polymer/Metal Interfaces and Defect Mediated Phenomena in Ordered Polymers
Publisher URL: http://www.mrs.org/members/proceedings/fall2002/b/B10_7.pdf