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探索微生物色素紫罗碱作为回收纸基表面增强拉曼散射（SERS）底物的可持续探针分子的应用。

Exploring the application of the microbial pigment violacein as a sustainable probe molecule for recycled paper-based SERS substrates.

作者信息

Tropea Alessia, Spadaro Donatella, Giuffrida Dario, Trusso Sebastiano, Giuffrida Daniele, Salerno Tania Maria Grazia, Montanez Julio, Morales-Oyervides Lourdes, Mondello Luigi, Ponterio Rosina Celeste

机构信息

Messina Institute of Technology c/o Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, Former Veterinary School, University of Messina, Messina, Italy.

Institute for Chemical and Physical Processes, National Research Council, Messina, Italy.

出版信息

Front Chem. 2025 May 21;13:1571986. doi: 10.3389/fchem.2025.1571986. eCollection 2025.

DOI:10.3389/fchem.2025.1571986
PMID:40469938
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12135342/
Abstract

Paper and board represent 10%-39% of the total municipal solid waste generated. In order to address the European Commission (EC) recycling targets, this study aimed to develop flexible Surface-enhanced Raman Scattering (SERS) recycled-paper-based substrates tested by using a new eco-friendly and nontoxic molecule probe. This study reports for the first time the implementation of the microbial dye violacein, obtained by batch cultivation, as SERS probe, as a suitable substitutive to the most employed toxic chemical dye Rhodamine 6G (R6G). The interaction of the proposed natural probe with the metal surface after the adsorption and the presence of local electromagnetic fields were evaluated by computational approach. The SERS devices developed were decorated by applying a single-step pulsed laser deposition (PLD) decoration method and characterized using UV-Vis absorption spectroscopy. The platform showed a remarkable sensitivity, achieving a detection limit of 10 M for violacein, allowing to point out the strong potential of this natural microbial dye as a sustainable probe molecule for low-concentration analytes detection on SERS-active substrates, making them suitable for several application fields, such as environmental monitoring, food safety, cultural heritage analysis and diagnostics. This study demonstrates the feasibility of implementing eco-friendly materials in the development of chemical sensors as a sustainable innovation in environmental science by minimizing the ecological impact.

摘要

纸张和纸板占城市固体废弃物总量的10%-39%。为了实现欧盟委员会（EC）的回收目标，本研究旨在开发基于回收纸张的柔性表面增强拉曼散射（SERS）基底，并使用新型环保无毒分子探针进行测试。本研究首次报道了通过分批培养获得的微生物染料紫罗碱作为SERS探针的应用，它是最常用的有毒化学染料罗丹明6G（R6G）的合适替代品。通过计算方法评估了所提出的天然探针在吸附后与金属表面的相互作用以及局部电磁场的存在情况。所开发的SERS装置采用单步脉冲激光沉积（PLD）装饰方法进行装饰，并使用紫外-可见吸收光谱进行表征。该平台表现出显著的灵敏度，对紫罗碱的检测限达到10 M，这表明这种天然微生物染料作为SERS活性基底上低浓度分析物检测的可持续探针分子具有强大潜力，使其适用于多个应用领域，如环境监测、食品安全、文化遗产分析和诊断。本研究通过最小化生态影响，证明了在化学传感器开发中使用环保材料作为环境科学可持续创新的可行性。

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