个人简介

Editor-in Chief, Diamond and Related Materials (Elsevier), 2011-present Member of the Neuroscience Program and The Fraunhofer Center for Coatings and Laser Applications (CCL) Adjunct Appointments: Departments of Chemical Engineering and Materials Science, and Pharmacology and Toxicology B.A., 1985, Univ. of Texas at Dallas Ph.D., 1991, Univ. of Kansas Postdoctoral Research Fellow, 1991-92, Space Power Institute and the Department of Chemical Engineering, Auburn Univ. JSPS Postdoc?toral Research Fellow, 1992-93, Tohoku Univ., Japan Full CV (PDF) AwardOrganizationDivisionLevel CodeType CodeStart DateEnd Date JSPS Postdoctoral Research FellowTohoku University, JapanPostdoctoralFellowship19921993 Postdoctoral Research FellowSpace Power Institute and the Department of Chemical Engineering, Auburn UniversityPostdoctoralFellowship19911992 Ph.D.University of KansasGraduateDegree1991 Bachelor of ArtsUniversity of Texas at DallasUndergraduateDegree1985 Associate EditorDiamond and Related MaterialsProfessionalEditorial

研究领域

Analytical Biological Materials

(Research Description PDF - 837 kb) Research in our group is interdisciplinary and spans several fields: physical and analytical electrochemistry, carbon materials, corrosion science and neuroscience. In general, we investigate structure-function relationships of novel carbon electrodes and study how to optimize the electrode material performance through systematic control of the physical, chemical and electronic properties. Carbon electrode materials of current interest are boron-doped microcrystalline and nanocrystalline diamond thin films, boron-doped single crystal dia-mond, tetrahedral amorphous carbon thin films, diamond and carbon fiber microelectrodes, conducting diamond powders and diamond microelectrode arrays. Neurohumoral Signaling Mechanisms in the GI Tract – In vitro electrochemical, immunohistochemical and neuropharmacological methods are being used to study excitatory and inhibitory neurotransmission in the small intestine and colon of animal models and humans. Three signaling molecules of interest are serotonin (5-HT), ATP and nitric oxide (NO). A goal of this work is to understand the mechanisms by which neurotransmission in the gut is altered in obesity, which leads to dysmotility and hypersensitivity to pain. Neural Control Mechanisms of Arteries and Veins in Hypertension – Sympathetic neuroeffector transmission to arteries and veins in animal models and humans is being investigated in vitro using electrochemical, immunohistochemical and neuropharmacological methods. Specifically, norepinephrine (NE) release from sympathetic varicosities at the adventitial surface of blood vessels is measured simultaneously with the dynamic changes in vascular contractility evoked by the vasoconstricting neurotransmitter. We seek to learn more about neuromuscular control mechanisms of arteries and veins, and how alteration of these mechanisms contributes to elevated blood pressure in salt-sensitive and obesity-linked hypertension. Aluminum Alloy Corrosion and Inhibition – Research is being conducted to understand corrosion mechanisms and kinetics in galvanically-coupled aviation materials modified with different surface pretreatments (conversion coatings) and primers. We are particularly interested in the formation, structure and corrosion protection afforded by trivalent chromium process coatings on various aluminum alloys (AA2xxx, 6xxx and 7xxx). The coated panels are subjected to different types of accelerated corrosion testing. The coated samples are then characterized for structural and chemical changes, while electrochemical measurements are utilized to assess the corrosion status. Nanostructured Carbon Powders for Separations and Energy Storage/Conversion – We are preparing high surface area and electrically conducting diamond or diamond/nanocarbon composite powders for use in energy storage and conversion, separations and chemical sensing. The diamond powders are produced by overcoating a substrate powder (diamond, sp2 carbon or metal oxide) with a thin layer of boron-doped ultrananocrystalline diamond. These nanoscale powders offer superb microstructural stability, corrosion resistance and stability over a wide pH range. The basic electrochemical properties, electrocatalyst formation and molecular interactions are being investigated. Diamond and Tetrahedral Amorphous Carbon for Chemical Analysis – Optically transparent diamond and tetrahedral amorphous carbon (ta-C) electrodes are being developed for use in UV/Vis and IR transmission spectroelectrochemical measurements, and chemical detection using flow injection analysis. Of particular interest at present is understanding reaction mechanisms and kinetics for soluble redox systems in room temperature ionic liquids (RTILs).

近期论文

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Diamond Electrodes: Diversity and Maturity, Einaga, Y; Foord JS; Swain GM., MRS Bulletin 2014, 39, 525. Electrochemical Activation of Diamond Microelectrodes: Implications for the In Vitro Measurement of Serotonin in the Bowel, Brocenschi RF; France M; Duran B; Galligan JJ; Swain, GM. Analyst 2014, 139, 3160. The Analysis of Estrogenic Compounds by Flow Injection Analysis with Amperometric Detection Using a Boron-Doped Diamond Electrode, Brocenschi, RF; Rocha-Filho, RC; Duran, B; Swain, GM. Talanta 2014, 126, 12. Effect of Deoxidation Pretreatment on the Corrosion Inhibition Provided by a Trivalent Chromium Process (TCP) Conversion Coating on AA2024, Li, L; Desouza, AL; Swain GM, J. Electrochem. Soc. 2014, 161, C246.