Regensburg 2010 – wissenschaftliches Programm
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BP: Fachverband Biologische Physik
BP 32: Posters: Physics of Cells
BP 32.47: Poster
Donnerstag, 25. März 2010, 17:15–20:00, Poster B1
Local quantitative temperature measurements on silicon nitride membranes for biological applications — •Maksym Koch1, Nadine Ewers1, Carsten Budke2, Britta Riechers2, Thomas Koop2, Simone Herth1, and Günter Reiss1 — 1Fakultät für Physik, Universität Bielefeld — 2Fakultät für Chemie, Universität Bielefeld
Thermocouples based on the Seebeck effect between two metals are widely used for various applications. However, these thermocouples usually consist of wires hundreds of nanometer thick measuring the temperature in large objects and voluminous bulk phases. In order to determine local temperatures, e.g., in single cells, thermocouples can be sputtered through special masks on top of a silicon nitride membrane. These membranes are only 50 or 100 nm thick and avoid extensive heat dissipation necessary for a quantitative analysis. Local quantitative temperature measurements were performed with Pd/Cr and Pd/NiCr with Seebeck coefficients of 27 uV/K and 35 uV/K, respectively, using various types of heating processes.