Dresden 2011 – wissenschaftliches Programm
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BP: Fachverband Biologische Physik
BP 24: Physics of Cells II
BP 24.2: Vortrag
Donnerstag, 17. März 2011, 10:30–10:45, ZEU 250
Thermal Measurements in Single Cells — •Simone Herth1, Miriam Giesguth2, Günter Reiss1, and Karl-Josef Dietz2 — 1Fakultät für Physik, Universität Bielefeld — 2Fakultät für Biologie, Universität Bielefeld
Thermocouples based on the Seebeck effect are commonly used as thermal sensors for a wide range of applications. Since the voltage measured at the reference points only depends on the temperature difference between the overlap of the two metals and the reference points and not on the size of the system, thermo couples can also be nanostructured on chip or even onto a glass capillary.
Ni and NiCr (Seebeck coefficient = 40 µV/K) was placed on the opposite sites of a glass capillary, which can be manipulated with a micromanipulator system. In this way, it is possible to place the capillary in a plant leaf and to measure the temperature increase during illumination. Due to the fine control of the micromanipulator, the microcapillary can also be inserted into a single cell, like a trichome of Arabidopsis thaliana.