Thermal characterization and sensor applications of one-dimensional nanostructur

2019-10-05 23:16:48

sensor thermal MEMS scattering phonon

责任者: Shi, Li;Yu, Choongho;Zhou, Jianhua 单位: Department of Mechanical Engineering, Texas Materials Institute, University of Texas at Austin, Austin, TX 78712, United States 来源出处: Journal of Physical Chemistry B,2005,109(47):22102-22111 摘要: We review the recent progress in thermal characterization and sensor applications of one-dimensional nanostructures employing microelectromechanical system (MEMS) devices. It was found by thermal measurements that the thermal conductance of a single wall carbon nanotube (SWCNT) was very close to the ballistic thermal conductance of a 1-nm-diameter SWCNT without signatures of phonon-phonon Umklapp scattering, a high thermoelectric figure of merit can potentially be obtained in bismuth telluride (BixTe1-x) nanowires with an optimized atomic ratio of x, and the thermal conductivity of metal oxide nanobelts was suppressed by increased phonon-boundary scattering. We further suggest that dielectrophoresis and other directed-assembly methods can be used for the large-scale integration of nanowires with MEMS to obtain ultrasensitive, stable, and selective sensor systems. © 2005 American Chemical Society. 关键词: Nanostructured materials;Thermodynamic properties;Sensors;Microelectromechanical devices;Thermal conductivity;Carbon nanotubes;Scattering;Phonon-boundary scattering;Nanowires;MEMS;Bismuth telluride