Journal
CURRENT OPINION IN COLLOID & INTERFACE SCIENCE
Volume 17, Issue 2, Pages 106-113Publisher
ELSEVIER SCIENCE LONDON
DOI: 10.1016/j.cocis.2011.08.008
Keywords
Polymer; Polyelectrolyte; Polyelectrolyte multilayer; Layer-by-layer; Electric potential; Electrode; Electrochemistry; Indium tin oxide; Nanofilm; Poly(L-lysine)
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Funding
- National Science Foundation [CBET-0651980, CBET-0756323]
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [1066994] Funding Source: National Science Foundation
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Thin films formed via the adsorption or layer-by-layer assembly of charged polymers are important in many sensing, energy, and biomedical applications. When the underlying substrate is a (semi)conductor, the opportunity exists to influence film formation and film properties through an applied electric potential. The recent literature on electrochemical influence of polyelectrolyte-based films is reviewed, with a focus on monolayer and multilayer film assembly and disassembly. Of particular interest are monolayer films grown to a tailored thickness on the 10-100 nm scale, and polyelectrolyte multilayer films controllably disassembled, upon application of a modest electric potential. Experimental observations are discussed in terms of governing factors such as interfacial pH and ionic composition, counter-ion correlations, charge regulation, dielectric discontinuity, and short-range polymer-polymer interactions. Recent modeling efforts are also briefly addressed. (C) 2011 Elsevier Ltd. All rights reserved.
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