Copper Complex-Coated Nanopatterned Fiber-Tip Guided Mode Resonance Device for Selective Detection of Ethylene
Copper Complex-Coated Nanopatterned Fiber-Tip Guided Mode Resonance Device for Selective Detection of Ethylene
复制标题
DOI：
10.1109/jsen.2021.3057619
复制
发表时间：
2021-08-15
影响因子：
4.3
通讯作者：
Kumar, Ratnesh
中科院分区：
文献类型：
--
作者：
Tabassum, Shawana;Kumar, Divyesh P.;Kumar, Ratnesh
乙烯（C2 H4）具有许多商业用途，在农业中，它在跃变型果实成熟中起着关键作用。本文报道了一种在光纤切割面上图案化的铜络合物涂层纳米结构，以实现高性能的乙烯气体传感器。本文的新奇在于基于光纤的乙烯气体的高灵敏度和高选择性的监测具有优异的性能。在光纤尖端形成聚合物纳米柱的周期性阵列，并涂覆有二氧化钛以用作导模谐振（GMR）装置。通过在GMR光纤尖端涂敷铜（I）络合物涂层，发展了一种选择性识别乙烯的直接方法。纳米图案化的光纤尖端GMR传感器表现出共振的敏感性，在表面的折射率的变化。为了重复使用，还在光纤尖端集成了一个简单且具有成本效益的可控加热器，以实现分析物分子从传感器表面的完全解吸。这是第一种集成加热器的光纤传感器，利用导模共振并涂有铜（I）络合物涂层，用于跟踪乙烯促进的香蕉成熟和衰老。该传感器对乙烯气体的最大灵敏度为60 pm/ppm，检测限为4.7 ppm。与我们早期的非特异性光纤尖端气体传感器相比，我们将乙烯的检测限提高了170倍，灵敏度提高了60倍。
Ethylene (C2H4) has many commercial usage and in agriculture it plays a key role in climacteric fruit ripening. This paper reports on a copper complex-coated nanostructures patterned on the cleaved facet of an optical fiber to realize a high-performance ethylene gas sensor. The novelty of this paper lies in fiber-optic based sensitive and selective monitoring of gaseous ethylene with excellent performance. A periodic array of polymer nanoposts are formed at the fiber tip and coated with titanium dioxide to serve as a guided mode resonant (GMR) device. A direct method of selectivity is developed for recognizing ethylene, by applying a copper (I) complex coating atop the GMR fiber-tip. The nanopatterned fiber-tip GMR sensor exhibits resonance sensitivity to variations in refractive index at the surface. For repeated use, a simple and cost-effective controllable heater is also integrated at the fiber tip to achieve a complete desorption of the analyte molecules from the sensor surface. This is a first-of-its-kind heater-integrated fiber optic sensor utilizing guided mode resonance and coated with a copper (I) complex coating, that is demonstrated for tracking the ethylene-promoted ripening and senescence of banana. The proposed sensor provides a maximum sensitivity of 60 pm/ppm to ethylene gas with a limit of detection of similar to 4.7 ppm. Compared to our earlier non-specific fiber-tip gas sensor, we improved the limit of detection for ethylene by 170-fold and sensitivity by 60-fold.