Optical Properties of Colloidal Indium Tin Oxide Suspended in a Thermal Fluid
| Autor: | Todd Otanicar, Drew DeJarnette, Mit Muni, Ebrima Tunkara, Kenneth P. Roberts |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Passivation Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Indium tin oxide Colloid chemistry.chemical_compound General Energy Nanocrystal Chemical engineering chemistry Oleylamine Particle size Physical and Theoretical Chemistry 0210 nano-technology Dispersion (chemistry) |
| Zdroj: | The Journal of Physical Chemistry C. 122:5639-5646 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.7b10855 |
| Popis: | We investigated changes in the optical properties of indium tin oxide (ITO) nanocrystals as a function of temperature. ITO is a plasmonic, wide bandgap semiconductor capable of absorbing UV and IR radiation. The nanoparticles were made using a standard two-pot synthesis, which resulted in the formation of ITO nanoparticles with myristic acid and oleylamine as surface passivation ligands. Ligand exchange with (6-7% aminopropylmethylsiloxane) dimethylsiloxane-copolymer was allowed dispersion of the particles into a thermal fluid, Duratherm S, which is capable of withstanding working temperatures of 300°C. Nanoparticles suspended in the fluid were heated over a range of temperatures and the properties investigated using IR spectrometry, UV-VIS, TEM, and particle size analysis. Although heating showed no change in particle size, spectral changes were clearly observed in the form of a strong blue shift and increased absorb-ance. These temperature-dependent changes in the spectral properties of ITO were attribu... |
| Databáze: | OpenAIRE |
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