AVS 53rd International Symposium
    MEMS and NEMS Monday Sessions
       Session MN+BI-MoA

Paper MN+BI-MoA7
Nanotribological Characterization of Vapor "Phase Deposited Positively-Charged Self"Assembled Monolayers Deposited on Polydimethylsiloxane for Nanochannel Application

Monday, November 13, 2006, 4:00 pm, Room 2007

Session: Surface and Interface Science of MEMS and NEMS
Presenter: M. Cichomski, The Ohio State University
Authors: M. Cichomski, The Ohio State University
B. Bhushan, The Ohio State University
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Surface modification of micro/nano fluidic devices by self assembled monolayers (SAMs) is very important for the controlling flow properties and protein adsorption. In this paper, vapor phase deposition was used to deposit four different SAMs on polydimethylsiloxane (PDMS) and identify optimum deposition conditions by measuring static contact angle. The PDMS surfaces were modified with one sulfhydryl terminated SAM and three different amine terminated SAMs. The deposited films were characterized by static contact angle and atomic force microscopy for surface roughness and adhesion. Static contact angle was monitored over time to determine stability of the SAMs. Fluorescently labeled amino and sulfhydryl groups were characterized by fluorescent microscopy to determine the surface concentration of the functional groups.