122nd General Meeting of the KCS

Type Poster Presentation
Area Electrochemistry
Room No. Grand Ballroom
Time 10월 19일 (금요일) 11:00~12:30
Code ELEC.P-500
Subject Electrochemical Determination of Dopamine with V2O5-WO3 Composite Nanotube
Authors Seong-gi Lim, Yukyung Shin, Youngmi Lee, Myung Hwa Kim, Chongmok Lee*
Department of Chemistry and Nano Science, Ewha Womans University, Korea
Abstract Dopamine (DA) is a vital modulator in nature, working especially as hormone and as neurotransmitter in human body. Direct detection of DA is sometimes necessary for clinical purpose and we herein provide amperometric sensing of DA using electrospun V2O5-WO3 composite nanotube (VW NT). We prepared VW NT with various ratios of V and W precursors via electrospinning followed by calcination. To improve sensitivity we tried further by reducing VW NT with hydrogen or irradiating VW NT with UV light. The change of the morphology and oxidation states of VW NT, before and after hydrogen reduction or UV irradiation, was characterized by field emission scanning electron microscopy (FE-SEM) and X-ray powder diffraction (XRD). To investigate the variation of electrochemical properties for DA measurement depending on treatment of VW NT, we used cyclic voltammetry, rotating disk electrode voltammetry, and amperometry. We also tried to circumvent the interference of other species (i.e., glucose, ascorbic acid, acetamidophenol, and uric acid). The support of this work by NRF-2017R1A2B4002159 is gratefully acknowledged.
E-mail sglim@ewhain.net