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High-Pressure Effect on the Optical Extinction of a Single Gold Nanoparticle
ACS Nano ( IF 15.8 ) Pub Date : 2018-10-09 00:00:00 , DOI: 10.1021/acsnano.8b05539 Fabio Medeghini 1 , Mike Hettich 1 , Romain Rouxel 1 , Silvio D. Silva Santos 1 , Sylvain Hermelin 1 , Etienne Pertreux 1 , Abraao Torres Dias 1 , Franck Legrand 1 , Paolo Maioli 1 , Aurélien Crut 1 , Fabrice Vallée 1 , Alfonso San Miguel 1 , Natalia Del Fatti 1
ACS Nano ( IF 15.8 ) Pub Date : 2018-10-09 00:00:00 , DOI: 10.1021/acsnano.8b05539 Fabio Medeghini 1 , Mike Hettich 1 , Romain Rouxel 1 , Silvio D. Silva Santos 1 , Sylvain Hermelin 1 , Etienne Pertreux 1 , Abraao Torres Dias 1 , Franck Legrand 1 , Paolo Maioli 1 , Aurélien Crut 1 , Fabrice Vallée 1 , Alfonso San Miguel 1 , Natalia Del Fatti 1
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When reducing the size of a material from bulk down to nanoscale, the enhanced surface-to-volume ratio and the presence of interfaces make the properties of nano-objects very sensitive not only to confinement effects but also to their local environment. In the optical domain, the latter dependence can be exploited to tune the plasmonic response of metal nanoparticles by controlling their surroundings, notably applying high pressures. To date, only a few optical absorption experiments have demonstrated this feasibility, on ensembles of metal nanoparticles in a diamond anvil cell. Here, we report a nontrivial combination between a spatial modulation spectroscopy microscope and an ultraflat diamond anvil cell, allowing us to quantitatively investigate the high-pressure optical extinction spectrum of an individual nano-object. A large tuning of the surface plasmon resonance of a gold nanobipyramid is experimentally demonstrated up to 10 GPa, in quantitative agreement with finite-element simulations and an analytical model disentangling the impact of metal and local environment dielectric modifications. High-pressure optical characterizations of single nanoparticles allow for the accurate investigation and modeling of size, strain, and environment effects on physical properties of nano-objects and also enable fine-tuned applications in nanocomposites, nanoelectromechanical systems, or nanosensing devices.
中文翻译：
高压对单个金纳米粒子光学消光的影响
当将材料的尺寸从体积减小到纳米级时，增强的表面体积比和界面的存在使纳米物体的属性不仅对约束效果非常敏感，而且对它们的局部环境非常敏感。在光学领域，可以通过控制金属纳米粒子的周围环境（尤其是施加高压）来利用后一种依赖性来调整金属纳米粒子的等离子体响应。迄今为止，只有很少的光学吸收实验证明了这种可行性，适用于钻石砧室中的金属纳米粒子集合体。在这里，我们报告了空间调制光谱显微镜和超扁平金刚石砧座细胞之间的非平凡组合，这使我们能够定量研究单个纳米物体的高压消光光谱。实验证明，金纳米双锥体分子的表面等离子体激元共振的大幅度调谐达到10 GPa，与有限元模拟和解析模型的定量协议相吻合，从而解开了金属和局部环境电介质修饰的影响。单个纳米粒子的高压光学表征可以对纳米物体的物理特性进行尺寸，应变和环境影响的精确研究和建模，还可以在纳米复合材料，纳米机电系统或纳米传感设备中进行微调应用。
更新日期：2018-10-09
中文翻译：
高压对单个金纳米粒子光学消光的影响
当将材料的尺寸从体积减小到纳米级时，增强的表面体积比和界面的存在使纳米物体的属性不仅对约束效果非常敏感，而且对它们的局部环境非常敏感。在光学领域，可以通过控制金属纳米粒子的周围环境（尤其是施加高压）来利用后一种依赖性来调整金属纳米粒子的等离子体响应。迄今为止，只有很少的光学吸收实验证明了这种可行性，适用于钻石砧室中的金属纳米粒子集合体。在这里，我们报告了空间调制光谱显微镜和超扁平金刚石砧座细胞之间的非平凡组合，这使我们能够定量研究单个纳米物体的高压消光光谱。实验证明，金纳米双锥体分子的表面等离子体激元共振的大幅度调谐达到10 GPa，与有限元模拟和解析模型的定量协议相吻合，从而解开了金属和局部环境电介质修饰的影响。单个纳米粒子的高压光学表征可以对纳米物体的物理特性进行尺寸，应变和环境影响的精确研究和建模，还可以在纳米复合材料，纳米机电系统或纳米传感设备中进行微调应用。
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