Impact of microfabrication processing temperatures on the resonant wavelength of gold nanoplates
| Autor: | Martin G. O’Toole, Kurtis T. James, Cindy K. Harnett, Robert S. Keynton, Jasmin Beharic |
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| Rok vydání: | 2021 |
| Předmět: |
Microelectromechanical systems
Materials science Shape change Infrared business.industry Mechanical Engineering 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences Processing methods Wavelength Mechanics of Materials Thermal Optoelectronics General Materials Science Thin film 0210 nano-technology business Microfabrication |
| Zdroj: | Materials Letters. 284:128967 |
| ISSN: | 0167-577X |
| DOI: | 10.1016/j.matlet.2020.128967 |
| Popis: | We show that low temperature processing (100–400 °C) of gold nanoplates (GNPs) permanently shifts their resonant wavelength peak from the infrared to visible (860–650 nm) after an hour at 350 °C. The mechanism is melting-induced shape change; as sharp triangular corners become round the smaller effective GNP diameter produces shorter resonant wavelengths. These wavelength shifts are relevant to GNP-driven microelectromechanical systems, where temperatures of 150–350 °C arise during thin film processing. Strategies to accommodate the observed thermal shifts include starting with particles that have a longer resonant wavelength, ensuring that nanoplates are well-dispersed, and using sub-200 °C processing methods. |
| Databáze: | OpenAIRE |
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