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Layer-by-layer assembly of poly(diphenylamine)/phosphotungstic acid modified electrode for electrocatalytic oxidation of ascorbic acid

등록일
2009년 8월 21일 17시 18분 50초
접수번호
1562
발표코드
35P146포 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 <발표Ⅳ>
발표형식
포스터
발표분야
분석화학
저자 및
공동저자
D. Ragupathy, A.Gopalan1, 이광필1
경북대학교 일반대학원 화학과, Korea
1경북대학교 화학교육과, Korea
Layer-by-layer assembly is a unique technique for the fabrication of composite films with nanometer precision. The attractive feature of this approach is its ability to assemble complex structures from modular components, and integrate them into self-assembling constructions for a wide range of applications such as drug delivery, molecular sensing, batteries and membranes. In the present work, we fabaricate a multilayer films consisting of oxidized poly(diphenylamine) (PDPA) and phosphotungstic acid (PTA). Electrochemical polymerization was used to deposit oxidized PDPA layer (PDPA(+)). A layer of negatively charged PTA was formed over the layer of PDPA(+). The processes of electrochemical polymerization and treatment with PTA were repeated to obtain the multilayer LbL film (PDPA/PTA)n, where n = number of layers of PDPA/PTA. Cyclic voltammetry and amperometric studies was used for the electrochemical property as well as the electroactivity of the (PDPA/PTA)n LbL film electrode towards AA oxidation were investigated. The enhanced electrocatalytic activity of (PDPA/PTA)n LbL film is attributed to the existence of tungsten atoms in the interlayers of PDPA.

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