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标题：Optical Detection of Fat Concentration in Milk Using MXene-Based Surface Plasmon Resonance Structure
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作者：Abdulkarem H. M. Almawgani ; Malek G. Daher ; Sofyan A. Taya 等
期刊名称：Biosensors
电子版ISSN：2079-6374
出版年度：2022
卷号：12
期号：7
DOI：10.3390/bios12070535
语种：English
出版社：MDPI Publishing
摘要：MXene (Ti 3C 2T x) has emerged very recently as an interacting material for surface plasmon resonance (SPR) configuration. It was discovered that Ti 3C 2T x can facilitate the adsorption of biomolecules due to its higher binding energies, stronger interaction between matter and light, and larger surface area. In this work, a two-dimensional Ti 3C 2T x and silicon layer-based SPR refractometric sensor is proposed for the sensitive and fast detection of milk fat concentration due to the high significance of this issue to people all over the world. The proposed SPR structure employs BK7 (BK7 is a designation for the most common Borosilicate Crown glass used for a variety of applications in the visible range) as a coupling prism and silver as a metal layer. The layer thicknesses and the number of Ti 3C 2T x sheets are optimized for the highest performance. The highest reached sensitivity is 350 deg./RIU with 50 nm silver and 4 nm silicon with a monolayer of Ti 3C 2T x, which is ultra-high sensitivity compared to the latest work that utilizes SPR configuration. The proposed SPR-based sensor’s ultra-high sensitivity makes it more attractive for usage in a variety of biosensing applications.
关键词：surface plasmon resonance;fat concentration in milk;MXene;sensitivity