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Reactive Hydrogel Patch for SERS Detection of Environmental Formaldehyde
ACS Sensors ( IF 8.2 ) Pub Date : 2023-04-12 , DOI: 10.1021/acssensors.2c02676 Jiaying Cao 1 , Sen Hu 1 , Wanxing Tang 1 , Yue Wang 1 , Yue Yang 1 , Feng Wang 1 , Xiaoyu Guo 1 , Ye Ying 1 , Xinling Liu 1 , Ying Wen 1 , Haifeng Yang 1
ACS Sensors ( IF 8.2 ) Pub Date : 2023-04-12 , DOI: 10.1021/acssensors.2c02676 Jiaying Cao 1 , Sen Hu 1 , Wanxing Tang 1 , Yue Wang 1 , Yue Yang 1 , Feng Wang 1 , Xiaoyu Guo 1 , Ye Ying 1 , Xinling Liu 1 , Ying Wen 1 , Haifeng Yang 1
Affiliation
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The tobacco epidemic is a public health threat that has taken a heavy toll of lives around the globe each year. As one of the poison species from smoking, formaldehyde (FA) affects both the smokers and nearby persons who are exposed to second-hand smoke. Therefore, on-site tracking of FA exposure could evaluate the public environmental safety and mitigate the potential hazards. Herein, we first prepare SiO2-shelled AuAg alloy nanoparticles (AuAg@SiO2) and then embed AuAg@SiO2 within agarose hydrogel to construct the three-dimensional (3D) surface-enhanced Raman scattering (SERS) substrate. A reagent of 3-methyl-2-benzothiazolinone hydrazine (MBTH) with reaction activity toward FA is loaded in the 3D substrate to obtain the selective SERS patch (designated as M-hydrogel patch). Based on a marker Raman peak at 1273 cm–1 from the reaction product of MBTH-FA, the M-hydrogel patch is used to realize SERS detection of FA in smoke. A good linear relationship from 5 × 10–4 to 5 mg/m3 and a limit of detection (LOD) of 2.92 × 10–5 mg/m3 could be reached. While for detection of FA in aqueous, a linear range of 1 × 10–7–1 × 10–3 mg/mL with an LOD of 1.46 × 10–8 mg/mL could be achieved. As the real application, the proposed M-hydrogel patch could be placed anywhere indoor to SERS evaluate the spatial distribution of FA in tobacco smoke, which is in connection with the second-hand smoke effect on children and adults. Such M-hydrogel patch-based SERS assay is exerted for on-field detection of FA in water and furniture panels by using a portable Raman system, showing satisfactory selectivity and reproducibility.
中文翻译：
用于环境甲醛 SERS 检测的反应性水凝胶贴片
烟草流行是一种公共卫生威胁，每年在全球范围内造成大量生命死亡。甲醛 (FA) 作为吸烟的毒物之一，会影响吸烟者和附近接触二手烟的人。因此，现场跟踪 FA 暴露可以评估公共环境安全并减轻潜在危害。在此，我们首先制备了SiO 2壳AuAg合金纳米粒子（AuAg@SiO 2），然后嵌入AuAg@SiO 2在琼脂糖水凝胶内构建三维 (3D) 表面增强拉曼散射 (SERS) 基板。将对 FA 具有反应活性的 3-甲基-2-苯并噻唑啉酮肼 (MBTH) 试剂加载到 3D 基板中以获得选择性 SERS 贴片（指定为 M-水凝胶贴片）。基于MBTH-FA反应产物在1273 cm -1处的拉曼标记峰，利用M-水凝胶贴片实现烟雾中FA的SERS检测。在 5 × 10 –4到 5 mg/m 3之间具有良好的线性关系，可以达到2.92 × 10 –5 mg/m 3的检测限 (LOD) 。而对于水溶液中 FA 的检测，线性范围为 1 × 10 –7 –1 × 10 –3mg/mL，LOD 可达 1.46 × 10 –8 mg/mL。作为实际应用，所提出的 M-水凝胶贴片可以放置在室内任何地方，以 SERS 评估烟草烟雾中 FA 的空间分布，这与二手烟对儿童和成人的影响有关。这种基于 M-水凝胶贴片的 SERS 分析被用于通过使用便携式拉曼系统对水和家具面板中的 FA 进行现场检测，显示出令人满意的选择性和重现性。
更新日期：2023-04-12
中文翻译：
用于环境甲醛 SERS 检测的反应性水凝胶贴片
烟草流行是一种公共卫生威胁，每年在全球范围内造成大量生命死亡。甲醛 (FA) 作为吸烟的毒物之一，会影响吸烟者和附近接触二手烟的人。因此，现场跟踪 FA 暴露可以评估公共环境安全并减轻潜在危害。在此，我们首先制备了SiO 2壳AuAg合金纳米粒子（AuAg@SiO 2），然后嵌入AuAg@SiO 2在琼脂糖水凝胶内构建三维 (3D) 表面增强拉曼散射 (SERS) 基板。将对 FA 具有反应活性的 3-甲基-2-苯并噻唑啉酮肼 (MBTH) 试剂加载到 3D 基板中以获得选择性 SERS 贴片（指定为 M-水凝胶贴片）。基于MBTH-FA反应产物在1273 cm -1处的拉曼标记峰，利用M-水凝胶贴片实现烟雾中FA的SERS检测。在 5 × 10 –4到 5 mg/m 3之间具有良好的线性关系，可以达到2.92 × 10 –5 mg/m 3的检测限 (LOD) 。而对于水溶液中 FA 的检测，线性范围为 1 × 10 –7 –1 × 10 –3mg/mL，LOD 可达 1.46 × 10 –8 mg/mL。作为实际应用，所提出的 M-水凝胶贴片可以放置在室内任何地方，以 SERS 评估烟草烟雾中 FA 的空间分布，这与二手烟对儿童和成人的影响有关。这种基于 M-水凝胶贴片的 SERS 分析被用于通过使用便携式拉曼系统对水和家具面板中的 FA 进行现场检测，显示出令人满意的选择性和重现性。
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