arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1911.05850physics.opticsphysics.app-ph
收藏

等离子体-光子协同杂化增强等离子体光催化

Enhanced Plasmonic Photocatalysis through Cooperative Plasmonic--Photonic Hybridization

Qinglan Huang, Taylor D. Canady, Rohit Gupta, Nantao Li, Srikanth Singamaneni, Brian T. Cunningham

摘要:

等离子体纳米粒子(NP)在催化光驱动的化学反应方面具有巨大的潜力。现在可以收获来自等离子体激元阻尼的常规假定的有害吸收损失,以通过激发和转移高能“热”载流子来驱动NP吸附剂的化学转化。等离子体激元散射的速率和选择性取决于入射光的特性。通过设计NP的光捕获的强度和波长,可以实现更有效和预测性的光催化剂。我们报告了一个等离子体-光子共振杂交策略,以大大提高热电子产生在可调,窄带波长。通过将银NP的等离子体激元共振耦合到光子晶体(PC)板中的导模共振,热电子驱动的还原转化的反应速率大大加速。该机制与具有针对目标化学优化的多种材料和形状的NP广泛兼容。这种新型的增强平台为合理设计高性能等离子体光催化剂提供了思路。

英文摘要:

Plasmonic nanoparticles (NPs) hold tremendous promise for catalyzing light-driven chemical reactions. The conventionally assumed detrimental absorption loss from plasmon damping can now be harvested to drive chemical transformations of the NP adsorbent, through the excitation and transfer of energetic "hot" carriers. The rate and selectivity of plasmonic photocatalysis are dependent on the characteristics of the incident light. By engineering the strength and wavelength of the light harvesting of a NP, it is possible to achieve more efficient and predictive photocatalysts. We report a plasmonic--photonic resonance hybridization strategy to substantially enhance hot electron generation at tunable, narrow-band wavelengths. By coupling the plasmon resonance of silver NPs to the guided mode resonance in a photonic crystal (PC) slab, the reaction rate of a hot-electron-driven reduction conversion is greatly accelerated. The mechanism is broadly compatible with NPs with manifold materials and shapes optimized for the targeted chemistry. The novel enhancement platform sheds light on rational design of high-performance plasmonic photocatalysts.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑