Investigation of SERS Frequency Fluctuations Relevant to Sensing and Catalysis.
Investigation of SERS Frequency Fluctuations Relevant to Sensing and Catalysis.
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DOI：
10.1021/acs.jpcc.2c03150
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发表时间：
2022-09-01
影响因子：
3.7
通讯作者：
Schultz, Zachary D.
中科院分区：
文献类型：
--
作者：
Zoltowski, Chelsea M.;Shoup, Deben N.;Schultz, Zachary D.
纳米颗粒上等离子体共振的激发产生通常用于传感应用的局部增强电场，并且高能电荷载流子可以作为光催化剂驱动化学转化。巯基苯甲酸（MBA）吸附在金纳米颗粒（AuNP）和二氧化硅包裹的金纳米颗粒（AuNP@silica）上的表面增强拉曼散射（Sers）光谱可以用来评估高能载流子对所观察信号的影响。使用传统的点聚焦拉曼光谱和宽场光谱成像方法记录测量结果，以评估不同颗粒在增加的功率密度下的光谱变化。宽场的方法提供了一个增加的采样统计，并显示在低功率密度，它通常是难以记录从一个点聚焦点的光谱从MBA的Sers频率波动的证据。点光谱测量的增加的光谱分辨率提供了改进的峰识别和将频率波动与带电中间物质相关联的能力。有趣的是，我们的工作表明，孤立的纳米粒子可能比聚集体更容易发生频率波动。
The excitation of plasmon resonances on nanoparticles generates locally enhanced electric fields commonly used for sensing applications and energetic charge carriers can drive chemical transformations as photocatalysts. The surface-enhanced Raman scattering (SERS) spectra from mercaptobenzoic acid (MBA) adsorbed to gold nanoparticles (AuNP) and silica encapsulated gold nanoparticles (AuNP@silica) can be used to assess the impact of energetic charge carriers on the observed signal. Measurements were recorded using a traditional point focused Raman spectroscopy and a wide-field spectral imaging approach to assess changes in the spectra of the different particles at increasing power density. The wide-field approach provides an increase in sampling statistics and shows evidence of SERS frequency fluctuations from MBA at low power densities, where it is commonly difficult to record spectra from a point focused spot. The increased spectral resolution of the point spectroscopy measurement provides improved peak identification and the ability to correlate the frequency fluctuations to charged intermediate species. Interestingly, our work suggests that isolated nanoparticles may undergo frequency fluctuations more readily than aggregates.
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影响因子：
10.8
作者：
Mukherjee, Shaunak;Libisch, Florian;Halas, Naomi J.
通讯作者：
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影响因子：
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作者：
Clement, Jean-Emmanuel;Leray, Aymeric;Finot, Eric
通讯作者：
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基于细胞中pH测定的基于4-羟基苯甲酸表面增强拉曼光谱法的比较。
影响因子：
3.5
作者：
Scarpitti BT;Morrison AM;Buyanova M;Schultz ZD
通讯作者：
Schultz ZD
影响因子：
7.4
作者：
Scott, B. L.;Carron, K. T.
通讯作者：
Carron, K. T.
DOI：
10.1021/acsmeasuresciau.2c00013
发表时间：
2022-08-17
期刊：
ACS MEASUREMENT SCIENCE AU
影响因子：
--
作者：
Shoup, Deben N.;Scarpitti, Brian T.;Schultz, Zachary D.
通讯作者：
Schultz, Zachary D.