caa a22 4500 463215559 CHVBK 20180405153155.0 cr unu---uuuuu 170326e20070601xx s 000 0 eng 10.1007/s00339-007-3879-y doi (NATIONALLICENCE)springer-10.1007/s00339-007-3879-y Characterization of thermal diffusivity of micro/nanoscale wires by transient photo-electro-thermal technique [Elektronische Daten] [T. Wang, X. Wang, J. Guo, Z. Luo, K. Cen] In this work, a transient photon-electro-thermal (TPET) technique based on step laser heating and electrical thermal sensing is developed to characterize the thermophysical properties of one-dimensional micro/nanoscale conductive and nonconductive wires. In this method, the to-be-measured thin wire/tube is suspended over two electrodes and is irradiated with a step cw laser beam. The laser beam induces a transient temperature rise in the wire/tube, which will lead to a transient change of its electrical resistance. A dc current is applied to the sample, and the resulting transient voltage variation over the wire is measured and used to extract the thermophysical properties of the sample. A 25.4-μm thick Pt wire is used as the reference sample to verify this technique. Sound agreement is obtained between the measured thermal diffusivity and the reference value. Applying the TPET technique, one can measure the thermal diffusivity of conductive single-wall carbon nanotube (SWCNT) bundles and nonconductive cloth fibers. For nonconductive wires, a thin (∼ nm) metallic film is coated on the outside of the wire for electrical thermal sensing. The measured thermal diffusivity for the SWCNT bundle is 2.53×10-5m2/s, much less than the thermal diffusivity of graphite in the layer direction. For microscale cloth fibers, our experiment shows its thermal diffusivity is at the level of 10-7m2/s. Springer-Verlag, 2007 Wang T. State Key Laboratory of Clean Energy Utilization, Zhejiang University, 310027, Hangzhou, P.R. China aut Wang X. Department of Mechanical Engineering, N104 Walter Scott Engineering Center, University of Nebraska-Lincoln, 68588-0656, Lincoln, NE, USA aut Guo J. Department of Mechanical Engineering, N104 Walter Scott Engineering Center, University of Nebraska-Lincoln, 68588-0656, Lincoln, NE, USA aut Luo Z. State Key Laboratory of Clean Energy Utilization, Zhejiang University, 310027, Hangzhou, P.R. China aut Cen K. State Key Laboratory of Clean Energy Utilization, Zhejiang University, 310027, Hangzhou, P.R. China aut Applied Physics A Springer-Verlag 87/4(2007-06-01), 599-605 0947-8396 87:4<599 2007 87 339 https://doi.org/10.1007/s00339-007-3879-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00339-007-3879-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wang T. State Key Laboratory of Clean Energy Utilization, Zhejiang University, 310027, Hangzhou, P.R. China aut NATIONALLICENCE 700 1- Wang X. Department of Mechanical Engineering, N104 Walter Scott Engineering Center, University of Nebraska-Lincoln, 68588-0656, Lincoln, NE, USA aut NATIONALLICENCE 700 1- Guo J. Department of Mechanical Engineering, N104 Walter Scott Engineering Center, University of Nebraska-Lincoln, 68588-0656, Lincoln, NE, USA aut NATIONALLICENCE 700 1- Luo Z. State Key Laboratory of Clean Energy Utilization, Zhejiang University, 310027, Hangzhou, P.R. China aut NATIONALLICENCE 700 1- Cen K. State Key Laboratory of Clean Energy Utilization, Zhejiang University, 310027, Hangzhou, P.R. China aut NATIONALLICENCE 773 0- Applied Physics A Springer-Verlag 87/4(2007-06-01), 599-605 0947-8396 87:4<599 2007 87 339 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer