Department of Physics, Tsinghua University, Beijing, People's Republic of China.
Nanotechnology. 2011 Jan 14;22(2):025502. doi: 10.1088/0957-4484/22/2/025502. Epub 2010 Dec 7.
Carbon nanotube (CNT) films, easily drawn from super-aligned CNT arrays with a large area and a good compatibility with semiconductor technology, have been used as light sensitive materials for infrared (IR) detection. A bolometric CNT detector made from one layer of super-aligned CNT film shows a 15.4% resistance change under 10 mW mm(-2) of IR illumination and a fast characteristic response time of 4.4 ms due to its ultra-small heat capacity per unit area in vacuum at room temperature. Besides the power intensity detection, the anisotropic property of the super-aligned CNT films makes them ideal materials to detect the polarization of IR light simultaneously, which provides great potential in infrared imaging polarimetry. Theoretical analyses have been carried out to investigate the influences of CNT film properties on the responsivity and response time of the detector.
碳纳米管（CNT）薄膜可通过大面积的超顺排 CNT 阵列轻松拉伸，并且与半导体技术具有良好的兼容性，已被用作红外（IR）探测的光敏材料。由一层超顺排 CNT 薄膜制成的量热型 CNT 探测器在 10 mW mm(-2) 的 IR 照射下表现出 15.4%的电阻变化，并且由于其在室温真空下单位面积的超小热容，具有快速的特征响应时间 4.4 ms。除了功率强度检测外，超顺排 CNT 薄膜的各向异性使其成为同时检测 IR 光偏振的理想材料，这在红外成像偏振测量中具有很大的潜力。已经进行了理论分析，以研究 CNT 薄膜性能对探测器响应率和响应时间的影响。
