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无金属肽半导体增强拉曼散射

Metal-Free Peptide Semiconductor-Enhanced Raman Scattering.

作者信息

Almohammed Sawsan, Fularz Agata, Alanazi Ahmed, Kanoun Mohammed Benali, Goumri Said Souraya, Tao Kai, Rodriguez Brian J, Rice James H

机构信息

School of Physics, University College Dublin, Belfield, Dublin 4, Ireland.

Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4, Ireland.

出版信息

Nano Lett. 2024 Dec 25;24(51):16301-16308. doi: 10.1021/acs.nanolett.4c04049. Epub 2024 Dec 11.

DOI:10.1021/acs.nanolett.4c04049
PMID:39663243
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11673574/
Abstract

There is a growing demand for sustainable and safe materials in developing technological systems and devices, including those that enhance Raman scattering. Organic (bio) materials based on simple peptides are one class of such materials. This study investigates self-assembled semiconducting peptides as metal-free substrates for surface-enhanced Raman scattering. Our results reveal significant variations in Raman enhancement factors, spanning up to 2 orders of magnitude. We examined specific Raman enhancement selection rules related to the energy levels and structural configurations of the probe molecules. The effectiveness of these rules underscores the importance of strong molecule-peptide coupling and efficient charge transfer for achieving optimal Raman enhancement factors. These insights offer a foundational understanding of peptide-molecule interactions and the underlying chemical mechanisms driving Raman enhancement, highlighting the potential of organic semiconductor-based materials as highly effective platforms for enhancing Raman scattering in chemical sensing applications.

摘要

在包括增强拉曼散射的技术系统和设备的开发中，对可持续和安全材料的需求日益增长。基于简单肽的有机（生物）材料就是这类材料中的一种。本研究调查了自组装半导体肽作为用于表面增强拉曼散射的无金属基底。我们的结果揭示了拉曼增强因子的显著变化，跨度高达2个数量级。我们研究了与探针分子的能级和结构构型相关的特定拉曼增强选择规则。这些规则的有效性强调了强分子 - 肽耦合和有效电荷转移对于实现最佳拉曼增强因子的重要性。这些见解为肽 - 分子相互作用以及驱动拉曼增强的潜在化学机制提供了基础理解，突出了基于有机半导体的材料作为在化学传感应用中增强拉曼散射的高效平台的潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/18c4/11673574/80f311ccbe72/nl4c04049_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/18c4/11673574/0b7765c24a35/nl4c04049_0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/18c4/11673574/4052005ad73d/nl4c04049_0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/18c4/11673574/7deb36b8f776/nl4c04049_0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/18c4/11673574/80f311ccbe72/nl4c04049_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/18c4/11673574/0b7765c24a35/nl4c04049_0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/18c4/11673574/4052005ad73d/nl4c04049_0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/18c4/11673574/7deb36b8f776/nl4c04049_0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/18c4/11673574/80f311ccbe72/nl4c04049_0004.jpg

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