Film Structure-Induced Resonant Oscillation Changes in a Poly Acrylic Acid Modified Quartz Crystal Sensor

A poly acrylic acid (PAA) film has been fabricated on a quartz crystal microbalance to study the dynamic property changes induced by different pH values. The experiment has been performed by a two-step. First, using the self-assembly procedure, the gold surface of quartz crystal was chemically modified to allow the graft copolymerization with PAA. Secondly, the resonant frequency response of the PAA-modified QCM was investigated by varying the pH values. The result shows an interesting oscillation property change nearby pH 5.5, and a possible mechanism for the change is proposed considering the oscillation properties of quartz crystal and the physical properties of PAA. Finally, a polymer film complex of PAA/collagen was also used to confirm the proposed mechanism.

Park, Jin Young (author)
Kim, Seung Jin (author)
Chang, Sang Mok (author)
Kim, In Ho (author)
Hilborn, JönsUppsala universitet,Institutionen för materialkemi(Swepub:uu)johil255 (author)
Kim, Jong Min (author)
Uppsala universitetInstitutionen för materialkemi (creator_code:org_t)

In:Molecular Crystals and Liquid Crystals: Informa UK Limited492, s. 221-2281542-14061563-5287

By the author/editor: Kim, Woo Sik; Park, Jin Young; Kim, Seung Jin; Chang, Sang Mok; Kim, In Ho; Hilborn, Jöns; show more...; Kim, Jong Min; show less...

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