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Design and Analysis of Graphene Based Spr Biosensor Using Ellipsometry Method
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DOR
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20.1001.2.9920081043.1399.1.1.4.9
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نویسنده
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Haji Najafi Mohammad Javad ,Saadatmand Bita ,Ahmadi Vahid ,Hamidi Mehri
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منبع
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همايش نانو فوتونيك ايران - 1399 - دوره : 1 - همایش نانوفوتونیک ایران ۱۳۹۹ - کد همایش: 99200-81043 - صفحه:148 -150
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چکیده
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Two-dimensional nanomaterials have attracted increasing attention for enhancing surface plasmon resonance (spr) biosensors application. in this work, we use the graphene layer to improve the sensitivity of the spr biosensors based on conventional kretschmann configuration. we employ ws2 and mos2 2d materials as an interlayer to enhance the sensitivity of au/graphene biosensor in angle interrogation method. transfer matrix method (tmm) is used to analyze the characteristics of the device. results show that using ws2 in au/graphene structure increases sensitivity about 14.82%, which is higher than mos2. combining graphene based spr and ellipsometry as a highly sensitive, label-free, real-time, and versatile method can be used to measure a very small concentration of biomolecules which leads to 174-fold enhancement compared to angle interrogation method.
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کلیدواژه
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Surface Plasmon Resonance; Graphene; Transition Metal Dichalcogenides (Tmd); Ellipsometry V_
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آدرس
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Tarbiat Modares University, Tarbiat Modares University, Tarbiat Modares University, Shahid Beheshti University
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Design and Analysis of Graphene Based SPR Biosensor Using Ellipsometry Method
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Authors
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Saadatmand Bita ,Hamidi Mehri ,Haji Najafi Mohammad Javad ,Ahmadi Vahid
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Abstract
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Two-dimensional nanomaterials have attracted increasing attention for enhancing surface plasmon resonance (SPR) biosensors application. In this work, we use the graphene layer to improve the sensitivity of the SPR biosensors based on conventional Kretschmann configuration. We employ WS2 and MoS2 2D materials as an interlayer to enhance the sensitivity of Au/Graphene biosensor in angle interrogation method. Transfer matrix method (TMM) is used to analyze the characteristics of the device. Results show that using WS2 in Au/Graphene structure increases sensitivity about 14.82%, which is higher than MoS2. Combining graphene based SPR and ellipsometry as a highly sensitive, label-free, real-time, and versatile method can be used to measure a very small concentration of biomolecules which leads to 174-fold enhancement compared to angle interrogation method.
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Keywords
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تشدید پلاسمون سطحی؛ گرافن؛ فلزهای واسطه دیچالکوژناید؛ بیضیسنجی
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