Localized surface plasmon resonance sensing of hydrogen sulfide using zinc oxide film.

IF 3.9 2区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Scientific Reports Pub Date : 2025-08-01 DOI:10.1038/s41598-025-12193-2

Yuki Takimoto, Keiji Komatsu, Hiromasa Namiki, Kazuto Mochizuki, Tomoe Nakagawa, Kohki Nagata, Kazuki Komiya, Tomoko Gessei, Akira Monkawa

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Abstract

A localized surface plasmon resonance (LSPR) sensor for hydrogen sulfide (H₂S) has been developed by coating a gold nanopattern with zinc oxide (ZnO) film. H₂S detection was achieved by monitoring changes in absorbance at a specific wavelength in the LSPR spectrum. The absorbance increased during exposure to H₂S and remained constant after H₂S ceased. These responses indicate that the sensor can measure the integrated concentrations of H₂S. The sensitivity to H₂S was enhanced with increasing relative humidity, enabling detection of 0.05-3 ppm H₂S within 10 min at 70% relative humidity. The sensor's sensitivity and LSPR spectrum could be restored by heating it at 500 °C in air. Notably, the sensor did not respond to methyl mercaptan or dimethyl sulfide, demonstrating high selectivity for H₂S. This study highlights the potential of the ZnO-deposited LSPR sensor for highly sensitive and selective detection of H₂S.

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利用氧化锌薄膜的局部表面等离子体共振传感硫化氢。

利用氧化锌（ZnO）薄膜包覆金纳米图案，研制了一种局部表面等离子体共振（LSPR）硫化氢（H2S）传感器。H2S检测是通过监测LSPR光谱中特定波长的吸光度变化来实现的。在H2S作用下吸光度增加，在H2S停止作用后保持不变。这些响应表明传感器可以测量H2S的综合浓度。随着相对湿度的增加，对H2S的敏感性增强，在70%的相对湿度下，可以在10分钟内检测到0.05-3 ppm的H2S。传感器的灵敏度和LSPR光谱可以通过在空气中加热500°C来恢复。值得注意的是，该传感器对甲基硫醇或二甲基硫化物没有反应，显示出对H2S的高选择性。这项研究强调了zno沉积LSPR传感器在高灵敏度和选择性检测H2S方面的潜力。

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

Scientific Reports Natural Science Disciplines-

CiteScore

7.50

自引率

4.30%

发文量

19567

审稿时长

3.9 months

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