Self-Organized Freestanding One-Dimensional Au Nanoparticle Arrays
| Autor: | Seokho Yun, Krishnamurthy Mahalingam, Ekaterina Poutrina, Theresa S. Mayer, Kathleen Richardson, Kurt G. Eyink, Wenchong Hu, Yu Yuwen, B. Jiang, Myungkoo Kang |
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| Rok vydání: | 2017 |
| Předmět: |
Thermal oxidation
Materials science General Engineering Nanowire General Physics and Astronomy Nanoparticle Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Transmission electron microscopy Scanning transmission electron microscopy General Materials Science 0210 nano-technology Absorption (electromagnetic radiation) Plasmon Excitation |
| Zdroj: | ACS Nano. 11:5844-5852 |
| ISSN: | 1936-086X 1936-0851 |
| DOI: | 10.1021/acsnano.7b01479 |
| Popis: | One-dimensional Au nanoparticle arrays encapsulated within freestanding SiO2 nanowires are fabricated by thermal oxidation of Au-coated Si nanowires with controlled diameter and surface modulation. The nanoparticle diameter is determined by the Si nanowire diameter and Au film thickness, while the interparticle spacing is independently controlled by the Si nanowire modulation. The optical absorption of randomly oriented Au nanoparticle arrays exhibits a strong plasmonic response at 550 nm. Scanning transmission electron microscopy (STEM)–electron energy loss spectrum (EELS) of nanoparticle arrays confirmed the same plasmonic response and demonstrated uniform optical properties of the Au nanoparticles. The plasmonic response in the STEM-EELS maps is primarily confined around the vicinity of the nanoparticles. On the other hand, examination of the same nanowires by energy-filtered transmission electron microscopy also revealed significant enhancement in the plasmonic excitation in the regions in between the... |
| Databáze: | OpenAIRE |
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