Ulrich, Georg and Pfitzner, Emanuel and Hoehl, Arne and Liao, Jung-Wei and Zadvorna, Olga and Schweicher, Guillaume and Sirringhaus, Henning and Heberle, Joachim and Kaestner, Bernd and Wunderlich, Joerg and Venkateshvaran, Deepak (2020) Thermoelectric nanospectroscopy for the imaging of molecular fingerprints. NANOPHOTONICS, 9 (14). pp. 4347-4354. ISSN 2192-8606, 2192-8614
Full text not available from this repository. (Request a copy)Abstract
We present a nanospectroscopic device platform allowing simple and spatially resolved thermoelectric detection of molecular fingerprints of soft materials. Our technique makes use of a locally generated thermal gradient converted into a thermoelectric photocurrent that is read out in the underlying device. The thermal gradient is generated by an illuminated atomic force microscope tip that localizes power absorption onto the sample surface. The detection principle is illustrated using a concept device that contains a nanostructured strip of polymethyl methacrylate (PMMA) defined by electron beam lithography. The platform's capabilities are demonstrated through a comparison between the spectrum obtained by on-chip thermoelectric nanospectroscopy with a nano-FTIR spectrum recorded by scattering-type scanning near-field optical microscopy at the same position. The subwavelength spatial resolution is demonstrated by a spectral line scan across the edge of the PMMA layer.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | THERMAL-CONDUCTIVITY; ABSORPTION; NANOSCOPY; nanospectroscopy; photothermoelectric effect; s-SNOM |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics Physics > Institute of Experimental and Applied Physics > Chair Professor Back > Group Josef Zweck |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 10 Mar 2021 09:06 |
| Last Modified: | 10 Mar 2021 09:06 |
| URI: | https://pred.uni-regensburg.de/id/eprint/43724 |
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