| Plasmon-Resonant Enhancement of Photocatalysis on Monolayer WSe2 | |
| Chen, Jihan1; Bailey, Connor S.5; Hong, Yilun6,7; Wang, Li8; Cai, Zhi2; Shen, Lang2; Hou, Bingya1; Wang, Yu2; Shi, Haotian3; Sambur, Justin8; Ren, Wencai6,7; Pop, Eric5; Cronin, Stephen B.1,3,4 | |
| 通讯作者 | Cronin, Stephen B.(scronin@usc.edu) |
| 2019-03-01 | |
| 发表期刊 | ACS PHOTONICS
 |
| ISSN | 2330-4022 |
| 卷号 | 6期号:3页码:787-792 |
| 摘要 | We report plasmonic enhancement of photocatalysis by depositing 5 nm Au nanoislands onto tungsten diselenide (WSe2) monolayer films. Under 532 nm wavelength illumination, the bare WSe2 film produces a relatively small photocurrent (20 nA). With the addition of Au nanoparticles, we observe enhancements of up to 7x (0.14 mu A) in the measured photocurrent. Despite these relatively small photocurrents, it is remarkable that adequate charge separating fields are generated over just 7.3 angstrom of material. Here, the improvement in the photocatalytic performance is caused by the local electric field enhancement produced in the monolayer WSe2 monolayer by the plasmonic Au nanoislands, as verified by electromagnetic simulations using the finite different time domain (FDTD) method. The near-field optical enhancement increases the electron-hole pair generation rate at the surface of WSe2, thus, increasing the amount of photogenerated charge contributing to increasing the amount of photogenerated charge contributing to photoelectrochemical reactions. Despite reducing the effective surface area of WSe2 in contact with the electrolytic solution by 70%, the plasmonic nanoislands couple the incident light very effectively from the far field to the near field in the plane of the monolayer WSe2, thereby improving the overall photoconversion efficiency from 3.5% to 24.7%. |
| 关键词 | plasmon photocatalysis tungsten diselenide water splitting enhancement FDTD TMDC |
| 资助者 | NSF ; Army Research Office ARO Award ; Air Force Office of Scientific Research (AFOSR) ; AFOSR ; NSF EFRI 2-DARE Grant ; NSF Graduate Research Fellowship |
| DOI | 10.1021/acsphotonics.9b00089 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | NSF[1512505] ; NSF[1708581] ; Army Research Office ARO Award[W911NF-14-1-0228] ; Air Force Office of Scientific Research (AFOSR)[FA9550-15-1-0184] ; AFOSR[FA9550-14-1-0251] ; NSF EFRI 2-DARE Grant[1542883] ; NSF Graduate Research Fellowship[DGE-114747] |
| WOS研究方向 | Science & Technology - Other Topics ; Materials Science ; Optics ; Physics |
| WOS类目 | Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Optics ; Physics, Applied ; Physics, Condensed Matter |
| WOS记录号 | WOS:000462260100027 |
| 出版者 | AMER CHEMICAL SOC |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.imr.ac.cn/handle/321006/132489 |
| 专题 | 中国科学院金属研究所 |
| 通讯作者 | Cronin, Stephen B. |
| 作者单位 | 1.Univ Southern Calif, Ming Hsieh Dept Elect Engn, Los Angeles, CA 90089 USA 2.Univ Southern Calif, Mork Family Dept Chem Engn & Mat Sci, Los Angeles, CA 90089 USA 3.Univ Southern Calif, Dept Chem, Los Angeles, CA 90089 USA 4.Univ Southern Calif, Dept Phys & Astron, Los Angeles, CA 90089 USA 5.Stanford Univ, Dept Elect Engn, Stanford, CA 94305 USA 6.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 7.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China 8.Colorado State Univ, Dept Chem, Ft Collins, CO 80523 USA |
| 推荐引用方式 GB/T 7714 | Chen, Jihan,Bailey, Connor S.,Hong, Yilun,et al. Plasmon-Resonant Enhancement of Photocatalysis on Monolayer WSe2[J]. ACS PHOTONICS,2019,6(3):787-792. |
| APA | Chen, Jihan.,Bailey, Connor S..,Hong, Yilun.,Wang, Li.,Cai, Zhi.,...&Cronin, Stephen B..(2019).Plasmon-Resonant Enhancement of Photocatalysis on Monolayer WSe2.ACS PHOTONICS,6(3),787-792. |
| MLA | Chen, Jihan,et al."Plasmon-Resonant Enhancement of Photocatalysis on Monolayer WSe2".ACS PHOTONICS 6.3(2019):787-792. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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