Fabrication of organosilane-modified electrodes for metal ion detection at the molecular level
Organosilane-modified (island-type) electrodes of 5 and 10 microm were fabricated and used to detect trace amounts of metal ions using atomic force microscopy. The smaller electrode had a lower limit of detection due to the enhancement in electron tunneling through metal ions that are adsorbed betwe...
| Veröffentlicht in: | Langmuir : the ACS journal of surfaces and colloids. - 1992. - 22(2006), 24 vom: 21. Nov., Seite 9805-8 |
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| Format: | Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2006
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| Zugriff auf das übergeordnete Werk: | Langmuir : the ACS journal of surfaces and colloids |
| Schlagworte: | Journal Article |
| Zusammenfassung: | Organosilane-modified (island-type) electrodes of 5 and 10 microm were fabricated and used to detect trace amounts of metal ions using atomic force microscopy. The smaller electrode had a lower limit of detection due to the enhancement in electron tunneling through metal ions that are adsorbed between the conductive-tip (mobile) and the surface (fixed) electrode. To simulate the detection of metal ions at concentrations below 10(-3) mM, a sectional adsorption mechanism is proposed, which satisfactorily explains the adsorption of Cu(II) and Hg(II) to the amine and thiol moieties of the 5 microm-sized electrode |
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| Beschreibung: | Date Completed 13.03.2007 Date Revised 19.11.2006 published: Print Citation Status PubMed-not-MEDLINE |
| ISSN: | 1520-5827 |