scholarly journals CH3NH3PbBr3 Thin Film Served as Guided-Wave Layer for Enhancing the Angular Sensitivity of Plasmon Biosensor

Biosensors ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 415
Author(s):  
Leiming Wu ◽  
Yuanjiang Xiang ◽  
Yuwen Qin
Keyword(s):  
Thin Film ◽  
Surface Plasmon Resonance ◽  
Gas Sensor ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Gas Sensing ◽  
Hybrid Structure ◽  
Guided Wave ◽  
Angular Sensitivity ◽  
Liquid Sensing

CH3NH3PbBr3 perovskite thin film is used as a guided-wave layer and coated on the surface of an Au film to form the Au-perovskite hybrid structure. Using the hybrid structure, a perovskite-based guided-wave surface plasmon resonance (GWSPR) biosensor is proposed with high angular sensitivity. First, it is found that the electric field at the sensing interface is improved by the CH3NH3PbBr3 perovskite thin film, thereby enhancing the sensitivity. The result demonstrates that the angular sensitivity of the Au-perovskite-based GWSPR biosensor is as high as 278.5°/RIU, which is 110.2% higher than that of a conventional Au-based surface plasmon resonance (SPR) biosensor. Second, the selection of the coupling prism in the configuration of the GWSPR biosensor is also analyzed, and it indicates that a low refractive index (RI) prism can generate greater sensitivity. Therefore, the low-RI BK7 prism is served as the coupling prism for the proposed GWSPR biosensor. Finally, the proposed GWSPR sensing structure can not only be used for liquid sensing, but also for gas sensing, and it has also been demonstrated that the GWSPR gas sensor is 2.8 times more sensitive than the Au-based SPR gas sensor.

scholarly journals Black phosphorus (BP)–graphene guided-wave surface plasmon resonance (GWSPR) biosensor

Nanophotonics ◽  
2020 ◽  
Vol 9 (14) ◽  
pp. 4265-4272
Author(s):  
Mingyang Su ◽  
Xueyu Chen ◽  
Linwei Tang ◽  
Bo Yang ◽  
Haijian Zou ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Electrical Conductance ◽  
Hybrid Structure ◽  
Guided Wave ◽  
Black Phosphorus ◽  
Wave Surface ◽  
Detection Range ◽  
Practical Applications

AbstractDue to lower out-of-plane electrical conductance, black phosphorus (BP) provides a suitable host material for improving the sensitivity of biosensors. However, BP oxidizes easily, which limits practical applications. In this article, we propose a sensitivity-enhanced guided-wave surface plasmon resonance (GWSPR) biosensor based on a BP–graphene hybrid structure. This BP–graphene hybrid structure exhibits strong antioxidation properties and exceptional biomolecule-trapping capability, which improve the stability and sensitivity of GWSPR biosensors, respectively. We show that the proposed GWSPR biosensor can distinguish refractive indices in the range of 1.33–1.78 RIU (RIU is the unit of RI), and the sensitivity reaches a maximum of 148.2°/RIU when the refractive index of sensing target is 1.33 RIU. The high sensitivity and broad detection range indicate that the proposed biosensor could significantly impact fields such as biological and chemical detection.

ROOM-TEMPERATURE NITRIC OXIDE GAS SENSING OF PEDOT THIN FILM USING SURFACE PLASMON RESONANCE

2009 ◽  
Vol 21 (06) ◽  
pp. 395-398 ◽  
Author(s):  
Tsing-Hau Wu ◽  
Hui-Hsin Lu ◽  
Wei-Yi Feng ◽  
Chii-Wann Lin ◽  
Chia-Yu Lin ◽  
...  
Keyword(s):  
Thin Film ◽  
Nitric Oxide ◽  
Surface Plasmon Resonance ◽  
Detection Limit ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Electrochemical Synthesis ◽  
Room Temperature ◽  
Gas Sensing ◽  
Optimal Thickness

A room-temperature nitric oxide ( NO ) gas sensor is prepared by using electrochemical synthesis of conducting polymer, poly-(3,4-ethylene dioxythiophene) (PEDOT) and characterized by surface plasmon resonance (SPR) method. Guided by SPR angle simulation, the optimal thickness of deposited PEDOT thin film is 25 nm and the resultant lowest detection limit of NO is 8 ppm. It exhibits 1.3 times higher responses to 25 ppm of NO gas than NO 2.

Au-Polypyrrole Framework Nanostructures for Improved Localized Surface Plasmon Resonance Volatile Organic Compounds Gas Sensing

2015 ◽  
Vol 15 (10) ◽  
pp. 7738-7742 ◽  
Author(s):  
Jae-Sung Lee ◽  
Na-Rae Yoon ◽  
Byoung-Ho Kang ◽  
Sang-Won Lee ◽  
Sai-Anand Gopalan ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Surface Plasmon Resonance ◽  
Gas Sensor ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Gas Sensing ◽  
Localized Surface Plasmon ◽  
Uniform Size ◽  
Volatile Organic

In this paper, we propose an Au-polypyrrole (Ppy) nanorod gas sensor for the detection of volatile organic compound (VOC) gases. This gas sensor operates on the principle of localized surface plasmon resonance (LSPR). The Au-Ppy nanorods used in this experiment were synthesized using an anodic aluminum oxide template by the electrochemical deposition method. Using field emission scanning electron microscopy, we confirmed that the Au-Ppy nanorod arrays were successfully fabricated with a uniform size. By depositing gold, the Au-Ppy nanorods exhibited both optical and LSPR interference. The gas sensing properties of the fabricated nanorods were tested for VOCs such as acetic acid, benzene, and toluene with a short response time (∼1 min). Moreover, the proposed VOC gas sensing system was tested with three types of VOC gases over a wide concentration range from 10 to 100 ppm. Highest sensitivity was observed for acetic acid gas, which had a linear relation with the gas concentration, indicating that the system can be used as a gas sensor.

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