A Thermal Plasmonic Sensor Platform: Resistive Heating of Nanohole Arrays
| Autor: | Kunli Xiong, Andreas B. Dahlin, Mikael Svedendahl, Mikael Käll, Mudassar Mumtaz Virk |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
business.industry Mechanical Engineering Surface plasmon Physics::Optics Bioengineering Nanotechnology General Chemistry Activation energy Condensed Matter Physics Plasma oscillation Thermal expansion Thermal Optoelectronics General Materials Science Thin film business Joule heating Plasmon |
| Zdroj: | Nano Letters. 14:3544-3549 |
| ISSN: | 1530-6992 1530-6984 |
| DOI: | 10.1021/nl5011542 |
| Popis: | We have created a simple and efficient thermal plasmonic sensor platform by letting a DC current heat plasmonic nanohole arrays. The sensor can be used to determine thermodynamic parameters in addition to monitoring molecular reactions in real-time. As an application example, we use the thermal sensor to determine the kinetics and activation energy for desorption of thiol monolayers on gold. Further, the temperature of the metal can be measured optically by the spectral shift of the bonding surface plasmon mode (0.015 nm/K). We show that this resonance shift is caused by thermal lattice expansion, which reduces the plasma frequency of the metal. The sensor is also used to determine the thin film thermal expansion coefficient through a theoretical model for the expected resonance shift. |
| Databáze: | OpenAIRE |
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