Photonic gas sensors exploiting directly the optical properties of hybrid carbon nanotube localized surface plasmon structures.

Photonic gas sensors exploiting directly the optical properties of hybrid carbon nanotube localized surface plasmon structures.
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DOI:
10.1038/lsa.2016.36
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发表时间:
2016-02
期刊:
Light, science & applications
影响因子:
--
通讯作者:
Webb DJ
Webb DJ
中科院分区:
其他
文献类型:
--
作者:
Allsop T;Arif R;Neal R;Kalli K;Kundrát V;Rozhin A;Culverhouse P;Webb DJ

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我们调查的碳纳米管(CNT)的光学性质的修改所引发的化学反应的存在下,一种特定的化合物(气态二氧化碳(CO2)),并显示这种机制具有重要的后果化学传感。碳纳米管引起了人们的极大研究兴趣,因为它们可以对特定的化学物质进行功能化,产生特定的物理响应,这表明它们在纳米技术和传感领域有许多潜在的应用。然而,到目前为止,利用它们的光学特性用于此目的已被证明是具有挑战性的。我们演示了使用本地化的表面等离子体产生的纳米结构薄膜,类似于一个大阵列的纳米线,检测的碳纳米管的光学性质的变化。在室温下使用气态形式的CO2证明了化学选择性。所展示的方法还导致一种新的电无源光学传感配置,开辟了在危险/爆炸性环境中使用CNT作为传感器的可能性。
We investigate the modification of the optical properties of carbon nanotubes (CNTs) resulting from a chemical reaction triggered by the presence of a specific compound (gaseous carbon dioxide (CO2)) and show this mechanism has important consequences for chemical sensing. CNTs have attracted significant research interest because they can be functionalized for a particular chemical, yielding a specific physical response which suggests many potential applications in the fields of nanotechnology and sensing. So far, however, utilizing their optical properties for this purpose has proven to be challenging. We demonstrate the use of localized surface plasmons generated on a nanostructured thin film, resembling a large array of nano-wires, to detect changes in the optical properties of the CNTs. Chemical selectivity is demonstrated using CO2 in gaseous form at room temperature. The demonstrated methodology results additionally in a new, electrically passive, optical sensing configuration that opens up the possibilities of using CNTs as sensors in hazardous/explosive environments.
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