Events
Past events can be found in the archive.
Internal users can find the list of upcoming seminar presentations and the seminar dates to be booked in the E134 Colab Space., opens an external URL in a new window
22. October 2024, 16:00 until 17:00
S. Schmid, TU Wien, Institute of Sensor and Actuator Systems
Seminar
Photothermal sensing is a highly sensitive technique that detects minute temperature changes caused by the absorption of light, resulting in thermal expansion or refractive index variations within a material. This capability makes photothermal sensing invaluable in applications like chemical analysis, biological detection, and material characterization. The fundamental sensitivity limit of photothermal sensors is governed by the fluctuation-dissipation theorem. Traditional photothermal sensors, such as thermal infrared detectors, rely on thermoelectric effects and are ultimately constrained by Johnson noise. In contrast, nanomechanical resonators offer a means to measure temperature changes mechanically, circumventing the Johnson noise limit. This study examines how noise processes, including thermomechanical noise and temperature fluctuations, influence the photothermal sensitivity of nanomechanical resonators. We explore the current limitations and propose pathways to advance from current single nanoparticle to single molecule spectroscopy.
Event details
- Event location
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SEM.R. DB gelb 05 B
1040 Wien
Wiedner Hauptstraße 8-10/E134 - Organiser
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IAP
Manuela Marik
marik@iap.tuwien.ac.at - Public
- Yes
- Entrance fee
- No
- Registration required
- No