Measurement of Plasmon-Mediated Two-Photon Luminescence Action Cross Sections of Single Gold Bipyramids, Dumbbells, and Hemispherically Capped Cylindrical Nanorods
| Autor: | Adam B. Taylor, Guh-Hwan Lim, Salmaan R. Syed, James W. M. Chon, Byungkwon Lim, Arif M. Siddiquee |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Materials science
Photoluminescence Aspect ratio business.industry Field strength 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Molecular physics 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Radius of curvature (optics) General Energy Optics Excited state Nanorod Physical and Theoretical Chemistry 0210 nano-technology business Luminescence Plasmon |
| Zdroj: | The Journal of Physical Chemistry C. 119:28536-28543 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.5b08214 |
| Popis: | Recent advances in two-photon excited photoluminescence of plasmonic gold nanorods have greatly expanded their application. Shape-controlling of nanorods can enhance a particular photophysical process to tailor needs, but its application to two-photon luminescence is yet to be fully developed despite its importance in biolabeling. Here, we report direct, independent measurements of two-photon action cross sections (TPACS) of single gold bipyramids, hemispherically capped cylindrical nanorods, and dumbbells. The effect of radius of curvature at the tip on TPACS are measured and compared per same aspect ratio and volume. Bipyramids have shown 33% more TPACS per volume for the aspect ratio range 3.8–4.2, with 0.28 GM/nm3 compared to 0.21 and 0.20 GM/nm3 for nanorods and dumbbells, respectively, at 27% measurement error. This value is not as high as the field strength at the tip, which can be 3–4 times higher for sharp bipyramids. Such moderate increase is attributed to the small surface area of the tip that ... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|