期刊論文
| 學年 | 112 |
|---|---|
| 學期 | 2 |
| 出版（發表）日期 | 2024-03-18 |
| 作品名稱 | Determining quasi-equilibrium electron and hole distributions of plasmonic photocatalysts using photomodulated x-ray absorption spectroscopy |
| 作品名稱（其他語言） | |
| 著者 | Levi Daniel Palmer; Wonseok Lee; Chung-Li Dong; Ru-Shi Liu; Nianqiang Wu; Scott Kevin Cushing |
| 單位 | |
| 出版者 | |
| 著錄名稱、卷期、頁數 | ACS Nano 18(3), p.9344-9353 |
| 摘要 | Most photocatalytic and photovoltaic devices operate under broadband, constant illumination. Electron and hole dynamics in these devices, however, are usually measured by using ultrafast pulsed lasers in a narrow wavelength range. In this work, we use excited-state X-ray theory originally developed for transient X-ray experiments to study steady-state photomodulated X-ray spectra. We use this method to attempt to extract electron and hole distributions from spectra collected at a nontime-resolved synchrotron beamline. A set of plasmonic metal core–shell nanoparticles is designed as the control experiment because they can systematically isolate photothermal, hot electron, and thermalized electron–hole pairs in a TiO2 shell. Steady-state changes in the Ti L2,3 edge are measured with and without continuous-wave illumination of the nanoparticle’s localized surface plasmon resonance. The results suggest that within error the quasi-equilibrium carrier distribution can be determined even from relatively noisy data with mixed excited-state phenomena. Just as importantly, the theoretical analysis of noisy data is used to provide guidelines for the beamline development of photomodulated steady-state spectroscopy. |
| 關鍵字 | X-ray absorption; X-ray spectroscopy; Bethe-Salpeter equation; plasmonics; core−shell nanoparticles; hot carriers; photocatalysis |
| 語言 | en_US |
| ISSN | 1936-0851; 1936-086X |
| 期刊性質 | 國外 |
| 收錄於 | SCI |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | 是 |
| 國別 | USA |
| 公開徵稿 | |
| 出版型式 | ,電子版,紙本 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/127569 ) |