Graphene and beyond Graphene MoS2: A New Window in Surface-Plasmon-Resonance-Based Fiber Optic Sensing

Akhilesh Kumar Mishra; Satyendra Kumar Mishra; Rajneesh Kumar Verma

doi:10.1021/acs.jpcc.5b08955

Graphene and beyond Graphene MoS₂: A New Window in Surface-Plasmon-Resonance-Based Fiber Optic Sensing

Akhilesh Kumar Mishra^*, Satyendra Kumar Mishra, Rajneesh Kumar Verma

^*Corresponding author for this work

Department of Electrical Engineering

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

233 Citations (Scopus)

Abstract

We theoretically propose a surface-plasmon-based fiber optic biosensor in metal/graphene/MoS₂ configuration with molybdenum disulfide (MoS₂) as a bio recognition layer. The proposed configuration works in the visible region of the electromagnetic spectrum with a very high sensitivity. A comparative theoretical study of the sensors with different metallic layers of gold (Au), copper (Cu), and aluminum (Al) has been performed. The sensor has been found to be the most sensitive in both Cu/graphene/MoS₂ and Al/graphene/MoS₂ configurations with sensitivity of 6.2 μm/RIU. In both of the configurations the thicknesses of Cu and Al layers is 50 nm and the number of layers of graphene is 16 and 27, respectively, while only a single layer of MoS₂ has been used. The sensitivity of the sensor in the Au/graphene/MoS₂ configuration is 5.0 μm/RIU with comparatively high depth of resonance.

Original language	English
Pages (from-to)	2893-2900
Journal	The Journal of Physical Chemistry C
Volume	120
Issue number	5
DOIs	https://doi.org/10.1021/acs.jpcc.5b08955
Publication status	Published - 18 Feb 2016

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title = "Graphene and beyond Graphene MoS2: A New Window in Surface-Plasmon-Resonance-Based Fiber Optic Sensing",

abstract = "We theoretically propose a surface-plasmon-based fiber optic biosensor in metal/graphene/MoS2 configuration with molybdenum disulfide (MoS2) as a bio recognition layer. The proposed configuration works in the visible region of the electromagnetic spectrum with a very high sensitivity. A comparative theoretical study of the sensors with different metallic layers of gold (Au), copper (Cu), and aluminum (Al) has been performed. The sensor has been found to be the most sensitive in both Cu/graphene/MoS2 and Al/graphene/MoS2 configurations with sensitivity of 6.2 μm/RIU. In both of the configurations the thicknesses of Cu and Al layers is 50 nm and the number of layers of graphene is 16 and 27, respectively, while only a single layer of MoS2 has been used. The sensitivity of the sensor in the Au/graphene/MoS2 configuration is 5.0 μm/RIU with comparatively high depth of resonance.",

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Graphene and beyond Graphene MoS₂: A New Window in Surface-Plasmon-Resonance-Based Fiber Optic Sensing. / Mishra, Akhilesh Kumar; Mishra, Satyendra Kumar; Verma, Rajneesh Kumar.
In: The Journal of Physical Chemistry C, Vol. 120, No. 5, 18.02.2016, p. 2893-2900.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

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AU - Mishra, Akhilesh Kumar

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AU - Verma, Rajneesh Kumar

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N2 - We theoretically propose a surface-plasmon-based fiber optic biosensor in metal/graphene/MoS2 configuration with molybdenum disulfide (MoS2) as a bio recognition layer. The proposed configuration works in the visible region of the electromagnetic spectrum with a very high sensitivity. A comparative theoretical study of the sensors with different metallic layers of gold (Au), copper (Cu), and aluminum (Al) has been performed. The sensor has been found to be the most sensitive in both Cu/graphene/MoS2 and Al/graphene/MoS2 configurations with sensitivity of 6.2 μm/RIU. In both of the configurations the thicknesses of Cu and Al layers is 50 nm and the number of layers of graphene is 16 and 27, respectively, while only a single layer of MoS2 has been used. The sensitivity of the sensor in the Au/graphene/MoS2 configuration is 5.0 μm/RIU with comparatively high depth of resonance.

AB - We theoretically propose a surface-plasmon-based fiber optic biosensor in metal/graphene/MoS2 configuration with molybdenum disulfide (MoS2) as a bio recognition layer. The proposed configuration works in the visible region of the electromagnetic spectrum with a very high sensitivity. A comparative theoretical study of the sensors with different metallic layers of gold (Au), copper (Cu), and aluminum (Al) has been performed. The sensor has been found to be the most sensitive in both Cu/graphene/MoS2 and Al/graphene/MoS2 configurations with sensitivity of 6.2 μm/RIU. In both of the configurations the thicknesses of Cu and Al layers is 50 nm and the number of layers of graphene is 16 and 27, respectively, while only a single layer of MoS2 has been used. The sensitivity of the sensor in the Au/graphene/MoS2 configuration is 5.0 μm/RIU with comparatively high depth of resonance.

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