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Synthesis, novel luminescence properties, and surface-enhanced Raman scattering of Au/Y2O3: Eu3+ composite nanotubes.
- Source :
- Dalton Transactions: An International Journal of Inorganic Chemistry; 2014, Vol. 43 Issue 39, p14720-14725, 6p
- Publication Year :
- 2014
-
Abstract
- Y(OH)<subscript>3</subscript>:Eu<superscript>3+</superscript> nanotubes were synthesized by a facile hydrothermal method first, and then Au particles were grown on the surface of Y<subscript>2</subscript>O<subscript>3</subscript>:Eu<superscript>3+</superscript> nanotubes by combining the vacuum extraction method and the annealing process. The composite nanotubes were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The effects of the Au content on the photoluminescence properties of the Au/Y<subscript>2</subscript>O<subscript>3</subscript>:Eu<superscript>3+</superscript> composite nanotubes were investigated in detail. In the excitation spectra of Au/Y<subscript>2</subscript>O<subscript>3</subscript>:Eu<superscript>3+</superscript> monitored at 614 nm, the <superscript>7</superscript>F<subscript>0</subscript>→<superscript>5</superscript>H<subscript>3</subscript> transition from Eu<superscript>3+</superscript> increased with increasing Au content, while the other sharp lines originating from Eu<superscript>3+</superscript> f-f electron transitions almost vanished. In the emission spectra, the spectral configurations of Eu<superscript>3+</superscript> in Au/Y<subscript>2</subscript>O<subscript>3</subscript>:Eu<superscript>3+</superscript> composite nanotubes varied with the excitation wavelengths. When the excitation wavelength was 256 nm, the 5D4→<superscript>7</superscript>F<subscript>0</subscript>, <superscript>5</superscript>D<subscript>7</subscript>→<superscript>7</superscript>F<subscript>0</subscript>, <superscript>5</superscript>G<subscript>2</subscript>→<superscript>7</superscript>F<subscript>0</subscript>, <superscript>5</superscript>L<subscript>6</subscript>→<superscript>7</superscript>F<subscript>0</subscript>, <superscript>5</superscript>D<subscript>0</subscript>→<superscript>7</superscript>F<subscript>0</subscript>, <superscript>5</superscript>D<subscript>0</subscript>→<superscript>7</superscript>F<subscript>1</subscript>, <superscript>5</superscript>D<subscript>0</subscript>→<superscript>7</superscript>F<subscript>2</subscript>, <superscript>5</superscript>D<subscript>0</subscript>→<superscript>7</superscript>F<subscript>3</subscript>, and <superscript>5</superscript>D<subscript>0</subscript>→<superscript>7</superscript>F<subscript>4</subscript> transitions from Eu<superscript>3+</superscript> ions in Au/Y<subscript>2</subscript>O<subscript>3</subscript>:Eu<superscript>3+</superscript> were observed. When the excitation wavelength was 378 nm, the plasmon resonance peak from Au nanoparticles was observed. In addition, 4-ATP was chosen as the model molecule to examine the performance of the Au/Y<subscript>2</subscript>O<subscript>3</subscript>:Eu<superscript>3+</superscript> composite nanotubes as SERS substrates. The relative intensities of the SERS spectra enhanced with the increase of Au<superscript>+</superscript> : Ln<superscript>3+</superscript> ratio. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 43
- Issue :
- 39
- Database :
- Complementary Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 100112891
- Full Text :
- https://doi.org/10.1039/c4dt01973c