Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 426, Issue -, Pages 6-11Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2013.02.039
Keywords
Layer-by-layer assembly; Polyacrylic acid functionalized graphene; Prussian Blue nanoparticles; Electrocatalysis
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Funding
- National Nature Science Foundation of China [21003084, 21271115]
- Shandong Province Promotive Research Foundation for Excellent Young and Middle-Aged Scientists [BS2010CL023]
- Taishan Scholar Foundation of Shandong Province, China
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In this paper, graphene surface was functionalized with polyacrylic acid (PAA) and was used as a building block to construct electrochemically functionalized multilayer via electrostatic layer-by-layer (LbL) assembly. Prussian Blue (PB) nanoparticles protected by poly(diallyldimethylammonium chloride) (PDDA-PB) were used as an example of electroactive species for the assembly. Through electrostatic interaction, the modified-graphene (PAA-graphene) was assembled together with the positively charged PDDA-PB. Atomic force microscopy (AFM) was used to demonstrate the modification of graphene sheets and microstructure of the graphene-based multilayer. Furthermore, the multilayer (PAA-graphene/PDDA-PB)(n) film electrode was characterized with cyclic voltammetry for its potential use in biosensing. The electrode exhibited elctrocatalytic activity for the reduction of H2O2. It can be expected that this work will stimulate the development of efficient and advanced biosensing devices and the construction of new and potentially useful nanosystems. (C) 2013 Elsevier B.V. All rights reserved.
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