Scanning electrochemical microscopy (SECM) of nanolitre droplets using an integrated working/reference electrode assembly.
Scanning electrochemical microscopy (SECM) has been performed in the restricted space of nanolitre droplets with a robust and easy-to-handle coaxial electrode assembly centring a Pt microdisk in a circular Ag electrode. Straightforward and reproducible fabrication of the specially designed probe tips was achieved by using Tollens' reaction to chemically deposit a uniform and well-adhering layer of silver on the body of a glass-insulated Pt microdisk electrode. The suitability of the novel dual-electrode SECM tip for measurement in small volumes was evaluated by imaging an array of four Pt band microelectrodes in 500 nL electrolyte.
Turcu
Florin
F
Analytische Chemie, Elektroanalytik & Sensorik, Ruhr-Universität Bochum, Universitätsstrasse 150, NC04/788, 44780 Bochum, Germany. eugen.turcu@rub.de
Schulte
Albert
A
Schuhmann
Wolfgang
W
D015374:Biosensing Techniques; D004563:Electrochemistry / Q000295:instrumentation / Q000379:methods*; D004573:Electrolytes / Q000737:chemistry; D008839:Microelectrodes; D008855:Microscopy, Electron, Scanning / Q000379:methods; D036103:Nanotechnology; D010984:Platinum / Q000737:chemistry; D012834:Silver / Q000737:chemistry; D012996:Solutions
D004573:Electrolytes; D012996:Solutions; D012834:Silver; D010984:Platinum