Unusual dark-field hyperspectral and confocal Raman microscopy features of a nanoporous gold electrode coated with porphyrazine complex

IF 1.5 4区 工程技术 Q3 MICROSCOPY Journal of microscopy Pub Date : 2024-06-14 DOI:10.1111/jmi.13339
Leonardo M. A. Ribeiro, Hiago N. Silva, Pedro H. A. Damasceno, Mauro Bertotti, Marcos M. Toyama, Marcelo Nakamura, Henrique E. Toma
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Abstract

Nanoporous gold electrodes are of great interest in electroanalytical chemistry, because of their unusual activity and large surface area. The electrochemical activity can be further improved by coating with molecular catalysts such as the tetraruthenated cobalt-tetrapyridylporphyrazines investigated in this work. The plasmonic enhancement of the scattered light at the nanoholes and borders modifies the electrode's optical characteristics, improving the transmission through the surface-enhanced Raman scattering (SERS) effect. When monitored by hyperspectral dark-field and confocal Raman microscopy, this effect allows probing of the porphyrazine species at the plasmonic nanholes, improving the understanding of the chemically modified gold electrodes.

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涂有卟嗪复合物的纳米多孔金电极的不寻常暗场高光谱和共焦拉曼显微镜特征。
纳米多孔金电极因其非同寻常的活性和较大的表面积而在电分析化学中备受关注。通过涂覆分子催化剂(如本研究中研究的四钌化四吡啶卟啉),可以进一步提高电化学活性。纳米孔和边界处的等离子散射光增强改变了电极的光学特性,通过表面增强拉曼散射(SERS)效应提高了透射率。利用高光谱暗视野和共焦拉曼显微镜进行监测时,这种效应可以探测质子纳米孔处的卟吩嗪物种,从而加深对化学修饰金电极的理解。
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来源期刊
Journal of microscopy
Journal of microscopy 工程技术-显微镜技术
CiteScore
4.30
自引率
5.00%
发文量
83
审稿时长
1 months
期刊介绍: The Journal of Microscopy is the oldest journal dedicated to the science of microscopy and the only peer-reviewed publication of the Royal Microscopical Society. It publishes papers that report on the very latest developments in microscopy such as advances in microscopy techniques or novel areas of application. The Journal does not seek to publish routine applications of microscopy or specimen preparation even though the submission may otherwise have a high scientific merit. The scope covers research in the physical and biological sciences and covers imaging methods using light, electrons, X-rays and other radiations as well as atomic force and near field techniques. Interdisciplinary research is welcome. Papers pertaining to microscopy are also welcomed on optical theory, spectroscopy, novel specimen preparation and manipulation methods and image recording, processing and analysis including dynamic analysis of living specimens. Publication types include full papers, hot topic fast tracked communications and review articles. Authors considering submitting a review article should contact the editorial office first.
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