Decoupling Through-Tip Illumination from Scanning in Nanoscale Photo-SECM
The use of scanning electrochemical microscopy (SECM) for nanoscale imaging of photoelectrochemical processes at semiconductor surfaces has recently been demonstrated. To illuminate a microscopic portion of the substrate surface facing the SECM probe, a glass-sealed, polished tip simultaneously served as a nanoelectrode and a light guide. One issue affecting nanoscale photo-SECM experiments is mechanical interactions of the rigid optical fiber with the tip motion controlled by the piezo-positioner. Here we report an improved experimental setup in which the tip is mechanically decoupled from the fiber and light is delivered to the back of the tip capillary using a complex lens system. The advantages of this approach are evident from the improved quality of the approach curves and photo-SECM images. The light intensity delivered from the optical fiber to the tip is not changed significantly by their decoupling.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2022 |
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| Erschienen: |
2022 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:94 |
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| Enthalten in: |
Analytical chemistry - 94(2022), 20 vom: 24. Mai, Seite 7169-7173 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Askarova, Gaukhar [VerfasserIn] |
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| Anmerkungen: |
Date Completed 25.05.2022 Date Revised 01.06.2022 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1021/acs.analchem.2c00753 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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NLM340611170 |
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| 500 | |a Citation Status MEDLINE | ||
| 520 | |a The use of scanning electrochemical microscopy (SECM) for nanoscale imaging of photoelectrochemical processes at semiconductor surfaces has recently been demonstrated. To illuminate a microscopic portion of the substrate surface facing the SECM probe, a glass-sealed, polished tip simultaneously served as a nanoelectrode and a light guide. One issue affecting nanoscale photo-SECM experiments is mechanical interactions of the rigid optical fiber with the tip motion controlled by the piezo-positioner. Here we report an improved experimental setup in which the tip is mechanically decoupled from the fiber and light is delivered to the back of the tip capillary using a complex lens system. The advantages of this approach are evident from the improved quality of the approach curves and photo-SECM images. The light intensity delivered from the optical fiber to the tip is not changed significantly by their decoupling | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, U.S. Gov't, Non-P.H.S. | |
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| 700 | 1 | |a Wang, Chen |e verfasserin |4 aut | |
| 700 | 1 | |a Mirkin, Michael V |e verfasserin |4 aut | |
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