The Influence of Plasmonic Au Nanoparticle Integration on the Optical Bandgap of Anatase TiO2 Nanoparticles
This work reports an investigation into the influence of the surface plasmon resonance (SPR) phenomenon of plasmonic Au nanoparticles on the optical bandgap of anatase titanium dioxide (TiO2) nanoparticles. In the study, the effect of particle integration on the optical bandgap of TiO2 nanoparti...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Universitas Indonesia
2019-07-01
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| Series: | International Journal of Technology |
| Subjects: | |
| Online Access: | http://ijtech.eng.ui.ac.id/article/view/2605 |
| Summary: | This work reports an investigation into the
influence of the surface plasmon resonance (SPR) phenomenon of plasmonic Au
nanoparticles on the optical bandgap of anatase titanium dioxide (TiO2)
nanoparticles. In the study, the effect of particle integration on the optical
bandgap of TiO2 nanoparticles was studied in two types of binary
Au-TiO2 heterostructured materials, namely Janus Au-TiO2
nanostructures and core-shell Au@TiO2, and their optical absorption
spectra were compared to the pristine anatase TiO2 nanoparticles.
The anatase TiO2 nanoparticles was prepared using the sol-gel
method. Well-dispersed Au nanoparticles with particle size diameter in the
range of 19-33 nm were successfully synthesized using the seed-mediated method
and exhibited unique light absorption due to SPR at 544 nm. Based on the
results, the integration of Au nanoparticles was found to be responsible for
the alteration of both light absorption behavior and the optical bandgap of TiO2.
Spectroscopic analyses revealed that the presence of the SPR phenomenon was
able to widen the light absorption range of TiO2 to the visible
spectrum. In addition, the optical bandgap of the heterostructures was found to
be slightly lower than the corresponding pristine anatase TiO2
nanoparticles. |
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| ISSN: | 2086-9614 2087-2100 |