基于垂直排列的石墨烯的非低温测辐射热计
Vertically aligned graphene based non-cryogenic bolometer
摘要：
我们报道了室温下垂直排列的石墨烯在红外辐射下的光响应。四探针测量表明，在脉冲红外辐射的I-V特性的电气开关。这里报道的垂直排列的石墨烯（VAG）的光响应比碳纳米管（CNT）样品高得多。我们的研究表明，这种光响应的出现完全是由于测热效应，电导率随温度而变化。温度升高6 ℃，VAGs的电阻值增加约2倍。此外，该区域的热电阻系数（TCR）为~11%/K，这是迄今为止报道的任何碳纳米材料的最高TCR值。
英文摘要：
We report the photoresponse of vertically aligned graphene upon IR irradiation at room temperature. Four probe measurements have shown electrical switching in I-V characteristics during pulsed IR irradiation. The photoresponse reported here for vertically aligned graphene (VAG) is much higher than carbon nanotube (CNT) samples. Our investigation has shown that such photoresponse arise solely due to bolometric effect, where the conductivity changes with temperature. The magnitude of the resistance of VAGs increases by ~ 2 fold for 6 0C increase in temperature. Also the Thermal Coefficient of Resistance (TCR) in this region is ~11%/K, which is the highest TCR value reported so far for any carbon nanomaterials.
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