Gold‐gold junction electrodes:the disconnection method

Chemical Record - Tập 12 Số 1 - Trang 143-148 - 2012
Sara E. C. Dale1, Anne Vuorema1,2, Ellen Ashmore1, Barbara Kasprzyk‐Hordern1, Mika Sillanpää3, Guy Denuault4, Frank Marken1
1Department of Chemistry, University of Bath, Bath BA2 7AY, UK
2Laboratory of Green Chemistry, LUT Energy, Lappeenranta University of Technology, Patteristonkatu 1, FI‐50100 Mikkeli (Finland)
3Laboratory of Green Chemistry, LUT Energy, Lappeenranta University of Technology, Patteristonkatu 1, FI-50100 Mikkeli (Finland)
4School of Chemistry, University of Southampton, Southampton, SO17 1BJ, UK

Tóm tắt

AbstractThe formation of gold‐gold junction electrodes for application in electroanalysis is described here based on electro‐deposition from a non‐cyanide gold plating bath. Converging growth of two hemispherical gold deposits on two adjacent platinum microelectrodes (both 100 µm diameter in glass, ca. 45 µm gap) followed by careful etching in aqueous chloride solution was employed. During growth both gold hemispheres “connect” and during etching “disconnection” is evident in a drop in current. Gold‐gold junctions with sub‐micron gaps are formed and applied for the electroanalytical detection of sub‐micromolar concentrations of hydroquinone in 0.1 M phosphate buffer pH 7 (Erev = 0.04 V vs. SCE) and sub‐micromolar concentration of dopamine in 0.1 M phosphate buffer pH 7 (Erev = 0.14 V vs. SCE). The potential future uses in analysis and limitations of gold‐gold junction electrodes are discussed. DOI 10.1002/tcr.201100008

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Tài liệu tham khảo

10.1590/S1984-82502010000300002

10.1002/ijch.201000041

10.1016/j.trac.2008.09.018

10.1016/j.snb.2008.08.033

10.1081/AL-120030682

10.1016/j.jelechem.2008.07.002

10.1021/ja073360w

10.1039/c0cp00675k

10.1016/j.bios.2005.07.012

10.1016/S0731-7085(98)00056-9

10.1080/00032710600867226

10.1016/j.snb.2004.06.020

10.1039/b900292h

10.1002/elan.200804354

10.1021/ac101303s

10.1002/elps.200900083

10.1007/978-1-4615-8561-9

10.1016/S1388-2481(01)00276-4

10.1002/elan.1140050802

10.1021/ac7016647

10.1016/j.jelechem.2009.04.018

10.1021/nn200586s

10.1021/j100205a087

10.1021/ar00179a002

10.1007/s10008-008-0698-9

10.1021/ac900790m

10.1016/0306-4522(88)90255-2

10.1021/ja073360w

10.1002/elan.200703825

10.1039/c1cp20532c

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Chemical Record

Tập 12 Số 1

143-148

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