Highly sensitive gold-film surface plasmon resonance (SPR) sensor employing germanium selenide (GeSe) nanosheets

IF 1.3 4区工程技术 Q4 CHEMISTRY, ANALYTICAL

Instrumentation Science & Technology Pub Date : 2022-03-15 DOI:10.1080/10739149.2022.2050752

Ze-Ying Hao, Yao Liu, Zhou Zhao, Qi Wang

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引用次数: 2

Abstract

Abstract Although surface plasmon resonance (SPR) methods are frequently employed due to their remarkable advantages such as reduced sample requirements, they confront a significant challenge in terms of sensitivity improvement. GeSe is an appropriate material for resolving this issue. According to the theoretical basis of the research, GeSe is a two-dimensional material which is a direct band gap semiconductor that may be utilized to promote electron transport and stimulate greater SPR phenomena. The first use of GeSe in an optical fiber sensor is reported in this study. A U-shaped optical fiber-GeSe-Au sensor is proposed. As a two-dimensional material with comparable physical characteristics to GeSe, MoS2 is compared to GeSe to characterize its influence upon the sensitivity. The sensitivity of fiber-GeSe-Au sensor is 7398.1 nm/refractive index unit (RIU), which is nearly twice as sensitive as a gold film SPR sensor and 1.5 times as sensitive as a sensor utilizing MoS2 nanosheets with the same structure. This study introduces a novel approach for enhancing the sensitivity, which gives a new option for monitoring biological substances at low concentrations with high sensitivity and stability and demonstrates that GeSe nanosheets have significant promise for future applications.

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采用硒化锗(GeSe)纳米片的高灵敏度金膜表面等离子共振(SPR)传感器

摘要尽管表面等离子体共振（SPR）方法由于其显著的优点（如减少样品需求）而经常被使用，但它们在提高灵敏度方面面临着重大挑战。GeSe是解决这一问题的合适材料。根据研究的理论基础，GeSe是一种二维材料，它是一种直接带隙半导体，可以用来促进电子传输和激发更大的SPR现象。本研究首次报道了GeSe在光纤传感器中的应用。提出了一种U型光纤GeSe-Au传感器。作为一种具有与GeSe相当的物理特性的二维材料，将MoS2与GeSe进行比较，以表征其对灵敏度的影响。光纤GeSe-Au传感器的灵敏度为7398.1 nm/折射率单位（RIU），其灵敏度几乎是金膜SPR传感器的两倍，是使用具有相同结构的MoS2纳米片的传感器的1.5倍。这项研究介绍了一种提高灵敏度的新方法，为监测低浓度生物物质提供了一种新的选择，具有高灵敏度和高稳定性，并表明GeSe纳米片在未来的应用前景广阔。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Instrumentation Science & Technology 工程技术-分析化学

CiteScore

3.50

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Instrumentation Science & Technology is an internationally acclaimed forum for fast publication of critical, peer reviewed manuscripts dealing with innovative instrument design and applications in chemistry, physics biotechnology and environmental science. Particular attention is given to state-of-the-art developments and their rapid communication to the scientific community. Emphasis is on modern instrumental concepts, though not exclusively, including detectors, sensors, data acquisition and processing, instrument control, chromatography, electrochemistry, spectroscopy of all types, electrophoresis, radiometry, relaxation methods, thermal analysis, physical property measurements, surface physics, membrane technology, microcomputer design, chip-based processes, and more. Readership includes everyone who uses instrumental techniques to conduct their research and development. They are chemists (organic, inorganic, physical, analytical, nuclear, quality control) biochemists, biotechnologists, engineers, and physicists in all of the instrumental disciplines mentioned above, in both the laboratory and chemical production environments. The journal is an important resource of instrument design and applications data.