By a News Reporter-Staff News Editor at Science Letter -- Researchers detail new data in Science. According to news reporting out of Bloomington, Indiana, by NewsRx editors, research stated, "We report a strategy for fabrication of sub-micron, multifunctional carbon electrodes and application of these electrodes as probes for scanning electrochemical microscopy (SECM) and scanning ion conductance microscopy (SICM). The fabrication process utilized chemical vapor deposition of parylene, followed by thermal pyrolysis to form conductive carbon and then further deposition of parylene to form an insulation layer."
Our news journalists obtained a quote from the research from Indiana University, "To achieve well-defined electrode geometries, two methods of electrode exposure were utilized. In the first method, carbon probes were masked in polydimethylsiloxane (PDMS) to obtain a cone-shaped electrode. In the second method, the electrode area was exposed via milling with a focused ion beam (FIB) to reveal a carbon ring electrode, carbon ring/platinum disk electrode, or carbon ring/nanopore electrode. Carbon electrodes were batch fabricated (~35/batch) through the vapor deposition process and were characterized with scanning electron microscopy (SEM), scanning transmission electron microscopy (STEM), and cyclic voltammetry (CV) measurements. Additionally, Raman spectroscopy was utilized to examine the effects of Ga(+) ion implantation, a result of FIB milling. Constant-height, feedback mode SECM was performed with conical carbon electrodes and carbon ring electrodes. We demonstrate the utility of carbon ring/nanopore electrodes with SECM-SICM to simultaneously collect topography, ion current and electrochemical current images. In addition, carbon ring/nanopore electrodes were utilized in substrate generation/tip collection (SG/TC) SECM. In SG/TC SECM, localized delivery of redox molecules affords a higher resolution, than when the redox molecules are present in the bath solution."
According to the news editors, the research concluded: "Multifunctional geometries of carbon electrode probes will find utility in electroanalytical applications, in general, and more specifically with electrochemical microscopy as discussed herein."
For more information on this research see: Multifunctional carbon nanoelectrodes fabricated by focused ion beam milling. Analyst, 2013;138(20):5973-82. (Royal Society of Chemistry - www.rsc.org/; Analyst - pubs.rsc.org/en/journals/journalissues/an)
Our news journalists report that additional information may be obtained by contacting R. Thakar, Dept. of Chemistry, Indiana University, 800 E Kirkwood Avenue, Bloomington, IN 47405, United States. Additional authors for this research include A.E. Weber, C.A. Morris and L.A Baker (see also Science).
Keywords for this news article include: Indiana, Science, Chemistry, Bloomington, United States, Electrochemical, North and Central America.
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