Shi Li, Yu Choongho, Zhou Jianhua
Department of Mechanical Engineering & Center for Nano- and Molecular Science and Technology, Texas Materials Institute, The University of Texas at Austin, Austin, Texas 78712, USA.
J Phys Chem B. 2005 Dec 1;109(47):22102-11. doi: 10.1021/jp053904l.
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.
我们回顾了利用微机电系统（MEMS）器件对一维纳米结构进行热表征及传感器应用方面的最新进展。通过热测量发现，单壁碳纳米管（SWCNT）的热导率非常接近直径为1纳米的SWCNT的弹道热导率，且没有声子 - 声子Umklapp散射的迹象；在具有优化原子比x的碲化铋（BixTe1-x）纳米线中有可能获得高热电优值；金属氧化物纳米带的热导率因声子 - 边界散射增加而受到抑制。我们进一步表明，介电泳和其他定向组装方法可用于纳米线与MEMS的大规模集成，以获得超灵敏、稳定且具有选择性的传感器系统。
