期刊論文
| 學年 | 97 |
|---|---|
| 學期 | 1 |
| 出版（發表）日期 | 2009-01-01 |
| 作品名稱 | Probing Bright and Dark Surface-Plasmon Modes in Individual and Coupled Noble Metal Nanoparticles Using an Electron Beam |
| 作品名稱（其他語言） | |
| 著者 | Chu, Ming-wen; Myroshnychenko, Viktor; Chen, Cheng-hsuan; 鄧金培; Deng, Jing-pei; Mou, Chung-yuan; García de Abajo, F. Javier |
| 單位 | 淡江大學化學學系 |
| 出版者 | American Chemical Society (ACS) |
| 著錄名稱、卷期、頁數 | Nano Letters 9(1), pp.399-404 |
| 摘要 | The rich structure of bright and dark surface-plasmon modes localized in individual and coupled gold nanoparticles is unveiled by electron-energy-loss spectroscopy performed in a scanning transmission electron microscope. Spatially resolved maps of surface-plasmon modes in the 1.5−2.5 eV range (wavelengths 500−800 nm), collected for individual nanorods, coupled nanorod dimers, and touching nanosphere dimers, are in excellent agreement with theory. Surface-plasmon maps constructed from the spatially and spectrally resolved energy-loss signals are shown to mimic rather well the near fields calculated for external illumination in the case of bright surface-plasmon modes (i.e., those coupling to external light). Dark surface-plasmon modes that cannot be excited by optical means are also found, and our electron probing technique provides further insight into their corresponding spatial distribution and symmetry, which are not accessible to any other existing techniques. Our results initiate the study of a whole set of new dark surface-plasmon modes that should become a source of new applications in sensing and microscopy but have escaped experimental scrutiny so far. |
| 關鍵字 | |
| 語言 | en |
| ISSN | 1530-6984 |
| 期刊性質 | 國外 |
| 收錄於 | |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | 否 |
| 國別 | USA |
| 公開徵稿 | |
| 出版型式 | ,電子版 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/50374 ) |