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Fabrication of Ag Nanoparticles Embedded in TiO2 Nanotubes: Using Electrospun Nanofibers for Controlling Plasmonic Effects
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- Authors
- Mi-Hee Jung, Yong Ju Yun, Moo-Jung Chu, Man Gu Kang
- Issue Date
- 2013-06
- Citation
- Chemistry - A European Journal, v.19, no.26, pp.8543-8549
- ISSN
- 0947-6539
- Publisher
- John Wiley & Sons
- Language
- English
- Type
- Journal Article
- Abstract
- Composites of electrospun poly(ethylene oxide) (PEO) fibers and silver nanoparticles (Ag NPs) were used as a soft template for coating with TiO 2 by atomic layer deposition (ALD). Whereas the as-deposited TiO 2 layers on PEO fibers and Ag NPs were completely amorphous, the TiO2 layers were transformed into polycrystalline TiO2 nanotubes (NTs) with embedded Ag NPs after calcination. Their plasmonic effect can be controlled by varying the thickness of the dielectric Al 2O3 spacer between Ag NPs and dye molecules by means of the ALD process. Electronic and spectroscopic analyses demonstrated enhanced photocurrent generation and solar-cell performance due to the intense electromagnetic field of the dye resulting from the surface plasmon effect of the Ag NPs. Plasmon-enhanced solar cells were fabricated by using polycrystalline TiO2 nanotubes (NTs) with embedded Ag nanoparticles (NPs), obtained by coating composites of electrospun poly(ethylene oxide) and Ag NPs with TiO2 by atomic layer deposition (ALD), as the photoanode. Their plasmon effect can be controlled by varying the thickness of a dielectric Al2O3 spacer between the Ag NPs and dye molecules by means of the ALD process (see figure). Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
- KSP Keywords
- ALD process, Ag NPS, Ag nanoparticles, As-deposited, Atomic Layer Deposition, Co. KGaA, Coating composites, Electromagnetic Field(EMF), Electrospun nanofibers, Plasmon-enhanced solar cells, Plasmonic effect