石河子大学“化工大讲堂”2024年第二十一讲

报告题目：Photothermal heating in plasmonic nanoreactors　　报 告 人：Raul D. Rodriguez  　　报告时间：2024年5月16日下午18:00　　报告地点：科技楼一楼明德学术报告厅　　报告人简介：　　Professor Raul D. Rodriguez has a strong track record in nanoscience and nanotechnology. He obtained his Ph.D. with the highest honors from Pierre-Marie Curie (Sorbonne) University in Paris, France 2009. Prof. Rodriguez specializes in nanoscale characterization and has significantly contributed to developing innovative methods in this field. Currently, he holds the position of Full Professor at Tomsk Polytechnic University. He leads research on flexible electronics with laser processing, including exploring plasmonic and 2D nanomaterials for cutting-edge applications in biomedicine, optoelectronics, energy, and safety.　　简介内容：We will discuss a novel approach to quantify thermal effects in plasmonic photocatalysis at the nanoscale. This is a critical point that was previously difficult to assess, but it is essential for applications like the development of solar fuels. Using self-assembled monolayers to study the interplay between electronic and photothermal phenomena, we probe various conditions: varying spatial and temporal scales, temperatures, and wavelengths. We found that the reaction in silver nanoparticles can be activated from the near-infrared to the visible range with the efficiency scaling with photon energy due to a dominance of the electronic contribution. Our findings show the significant, yet previously underappreciated, role of photothermal effects in gold nanoparticles, showing catalytic activities that challenge the conventional supremacy of silver in the absence of capping agents. The use of silicon nanowires as localized temperature probes marks a significant advancement in nanoscale thermometry, enabling precise thermal measurements that were previously unattainable. This approach fills a crucial gap in measuring photothermal contributions and sets a new standard for temperature monitoring in photocatalysis.主办单位：石河子大学化学化工学院化工绿色过程兵团重点实验室