scholarly journals Versatile Sensing Structure: GaP/Au/Graphene/Silicon

Photonics ◽  
2021 ◽  
Vol 8 (12) ◽  
pp. 547
Author(s):  
Satyendra Kumar Mishra ◽  
Rajneesh Kumar Verma ◽  
Akhilesh Kumar Mishra

A versatile sensing scheme for gas and biomolecule detection has been proposed theoretically using optimized GaP/Au/Graphene/Silicon structures. A Gallium Phosphide (GaP) prism is used as a substrate in the proposed surface plasmon resonance based sensing scheme, which is designed to be in Kretschmann configuration. The thicknesses of different constituent layers have been optimized for the maximum values of the sensitivities of the gas and bio-sensing probes. To delineate the role of the silicon layer, sensing probes without a silicon layer have also been numerically modelled and compared. The present GaP/Au/Graphene/Silicon probes possess higher values of sensitivity for the detection of gas and biomolecules compared to the conventional SPR sensing probes reported in the literature.

2017 ◽  
Vol 7 (1) ◽  
pp. 1
Author(s):  
Wida Yanti ◽  
Asih Melati

<p><br />Halal foods and medicines are an absolute daily needs for the Muslim community in Indonesia. Therefore the authority institutions in indonesian goverment should ensure the availability of this. It is of course inseparable from the role of higher education through the development of its technology to develop halal detection of foods and drugs. This study is an effort to contribute to the Halal Research Center of UIN Sunan Kalijaga Yogyakarta through the biosensor development in halal detection foods and medicines based on biosensor SPR. This device using graphene materials to improve the detection sensitivity of pork gelatin material that is likely contained in foodstuffs and medicine. From analytical calculation and computation, enhancement of the SPR biosensor performance by involvement graphene it was shown through the ATR (Attenuated Total Reflectance) reflective curve. The result of this results was found the enhancement of the sensitivity 2,86 %.</p><p>Keyword: Surface Plasmon Resonance (SPR), Porcine Gelatin, Graphene, ATR</p>


2016 ◽  
Vol 161 (1) ◽  
pp. 37-43 ◽  
Author(s):  
Natsuki Fukuda ◽  
Yoshiaki Suwa ◽  
Makiyo Uchida ◽  
Yoshihiro Kobashigawa ◽  
Hideshi Yokoyama ◽  
...  

2016 ◽  
Vol 122 (4) ◽  
Author(s):  
Jiří Bulíř ◽  
Tomáš Zikmund ◽  
Michal Novotný ◽  
Ján Lančok ◽  
Ladislav Fekete ◽  
...  

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