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Your search keyword '"Zhao, Y. P."' showing total 26 results
Start Over Author "Zhao, Y. P." Journal applied physics letters
26 results on '"Zhao, Y. P."'

25. Angle dependent surface enhanced Raman scattering obtained from a Ag nanorod array substrate.

Author

Yongjun Liu, Jianguo Fan, Zhao, Y.-P., Shanmukh, Saratchandra, and Dluhy, Richard A.

Subjects
SURFACE enhanced Raman effect, SURFACE chemistry, MOLECULES, SILVER, NUCLEAR excitation, ALKENES, LASERS
Abstract

The angular dependence of surface enhanced Raman scattering (SERS) has been investigated for molecules adsorbed onto Ag nanorod array substrates fabricated using an oblique angle deposition technique. The strong SERS signal of trans-1,2-bis(4-pyridyl) ethene (BPE) was found to be strongly dependent on the incident angle of the excitation laser, with the maximum SERS intensity appearing at approximately 45° relative to the surface normal. A scattering model based on classical electrodynamic dipole radiation has been developed for BPE adsorbed onto these Ag nanorod substrates, and the theoretical SERS scattering intensity was found to be in good agreement with the experimental results. [ABSTRACT FROM AUTHOR]

Published
2006
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26. Anomalous polarized absorbance spectra of aligned Ag nanorod arrays.

Author

Chaney, S. B., Zhang, Z.-Y., and Zhao, Y.-P.

Subjects
ABSORPTION spectra, SPECTRUM analysis, SILVER, POLARIZATION (Electricity), ANISOTROPY, WAVELENGTHS
Abstract

The polarized absorbance spectra of Ag nanorod array substrates with different lengths prepared by oblique angle deposition were studied in detail. An anomalous anisotropic absorbance was obtained which follows the relation α(θ)=-ln[A(1+B sin2 θ)]β, where θ is the polarization angle with respect to p-polarization direction. The exponent β(<0.5) is wavelength independent. This result cannot be interpreted by the conventional anisotropic effective medium theory, and the possible origin is the inhomogeneous size and orientation distributions that cause the variations in transmission and polarization. [ABSTRACT FROM AUTHOR]

Published
2006
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