Tip-Enhanced Raman Imaging of Plasmon-Driven Coupling of 4-Nitrobenzenethiol on Au-Decorated Magnesium Nanostructures.
Tip-Enhanced Raman Imaging of Plasmon-Driven Coupling of 4-Nitrobenzenethiol on Au-Decorated Magnesium Nanostructures.
复制标题
等离子激元驱动的 4-硝基苯硫醇在金装饰的镁纳米结构上耦合的尖端增强拉曼成像。
DOI：
10.1021/acs.jpcc.3c01345
复制
发表时间：
2023-04-27
影响因子：
3.7
通讯作者：
Kurouski, Dmitry
中科院分区：
文献类型：
--
作者：
Patil, Swati J.;Lomonosov, Vladimir;Ringe, Emilie;Kurouski, Dmitry
镁纳米颗粒在紫外区、可见光区和近红外区显示出局域表面等离子体共振现象，并因其可持续性和生物相容性而受到越来越多的关注。在这项研究中，我们使用尖端增强拉曼光谱(TERS)研究了由一层薄的自然氧化层保护的镁纳米颗粒及其通过部分原电池置换产生的金修饰的双金属类似物，金-镁纳米颗粒的光催化性能。我们发现，当镀金的针尖与仅吸附在镁纳米颗粒上的4-硝基苯硫醇(4-NBT)自组装单分子膜接触时，不会将4-NBT还原为对，p‘-二硫代偶氮苯(DMAB)。然而，用Au修饰镁使这些双金属结构具有催化活性。光催化活性的DMAB信号信号在附着在镁表面的Au纳米颗粒周围比在硅衬底上的Au纳米颗粒周围更离域，这表明镁核与Au修饰之间存在耦合。这份关于包括等离子体镁在内的双金属结构的光催化活性的报告为进一步利用镁的多功能性和丰度而构建催化剂结构铺平了道路。
Magnesium nanoparticles (MgNPs) exhibit localized surface plasmon resonances across the ultraviolet, visible, and near-infrared parts of electromagnetic spectrum and are attracting increasing interest due to their sustainability and biocompatibility. In this study, we used tip-enhanced Raman spectroscopy (TERS) to examine the photocatalytic properties of MgNP protected by a thin native oxide layer and their Au-modified bimetallic analogs produced by partial galvanic replacement, Au-MgNPs. We found no reduction of 4-nitrobenzenethiol (4-NBT) to p,p′-dimercaptoazobisbenzene (DMAB) when a Au-coated tip was placed in contact with a self-assembled monolayer of 4-NBT molecules adsorbed on MgNPs alone. However, decorating Mg with Au made these bimetallic structures catalytically active. The DMAB signal signature of photocatalytic activity was more delocalized around AuNPs attached to Mg than around AuNPs on a Si substrate, indicating coupling between the Mg core and Au decorations. This report on photocatalytic activity of a bimetallic structure including plasmonic Mg paves the way for further catalyst architectures benefiting from Mg’s versatility and abundance.
登录
查看更多内容
表面等离子共振辅助金银纳米粒子上的氧活化
影响因子：
16.6
作者：
Huang, Yi-Fan;Zhang, Meng;Tian, Zhong-Qun
通讯作者：
Tian, Zhong-Qun
影响因子：
3.7
作者：
Li, Zhandong;Rigor, Joel;Kurouski, Dmitry
通讯作者：
Kurouski, Dmitry
DOI：
10.1021/acs.jpcc.1c07544
发表时间：
2022-01-13
期刊：
The journal of physical chemistry. C, Nanomaterials and interfaces
影响因子：
--
作者：
Hopper ER;Wayman TMR;Asselin J;Pinho B;Boukouvala C;Torrente-Murciano L;Ringe E
通讯作者：
Ringe E
影响因子：
17.1
作者：
Brown, Ana M.;Sundararaman, Ravishankar;Atwater, Harry A.
通讯作者：
Atwater, Harry A.
影响因子：
10.8
作者：
Biggins, John S.;Yazdi, Sadegh;Ringe, Emilie
通讯作者：
Ringe, Emilie