Surface-enhanced Raman scattering of silver-gold bimetallic nanostructures with hollow interiors

Wang, Yuling, Chen, Hongjun, Dong, Shaojun and Wang, Erkang (2006) Surface-enhanced Raman scattering of silver-gold bimetallic nanostructures with hollow interiors. Journal of Chemical Physics, 125 4: . doi:10.1063/1.2216694

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Author Wang, Yuling
Chen, Hongjun
Dong, Shaojun
Wang, Erkang
Title Surface-enhanced Raman scattering of silver-gold bimetallic nanostructures with hollow interiors
Journal name Journal of Chemical Physics   Check publisher's open access policy
ISSN 0021-9606
1089-7690
Publication date 2006-07-28
Sub-type Article (original research)
DOI 10.1063/1.2216694
Open Access Status File (Publisher version)
Volume 125
Issue 4
Total pages 7
Place of publication Melville, NY, United States
Publisher A I P Publishing LLC
Language eng
Formatted abstract
Surface-enhanced Raman scattering (SERS) activity of silver-gold bimetallic nanostructures (a mean diameter of ∼100nm) with hollow interiors was checked using p-aminothiophenol (p-ATP) as a probe molecule at both visible light (514.5 nm) and near-infrared (1064 nm) excitation. Evident Raman peaks of p-ATP were clearly observed, indicating the enhancement Raman scattering activity of the hollow nanostructure to p-ATP. The enhancement factors (EF) at the hollow nanostructures were obtained to be as large as (0.8±0.3) × 106 and (2.7±0.5) × 108 for 7a and 19b (b2) vibration mode, respectively, which was 30-40 times larger than that at silver nanoparticles with solid interiors at 514.5 nm excitation. EF values were also obtained at 1064 nm excitation for 7a and b2-type vibration mode, which were estimated to be as large as (1.0±0.3) × 106 and (0.9±0.2) × 107, respectively. The additional EF values by a factor of ∼10 for b2-type, band were assumed to be due to the chemical effect. Large electromagnetic EF values were presumed to derive from a strong localized plasmas electromagnetic field existed at the hollow nanostructures. SERS activity of hollow nanostructures with another size (a mean diameter of ∼80 nm) was also investigated and large EF for 7a and b2-type band are obtained to be (0.6±0.3) × 106 and (1.7±0.7) × 108, respectively, at 514.5 nm excitation and (0.2±0.1) × 106 and (0.6±0.2) × 107, respectively, at 1064 nm excitation. Although the optical properties of the hollow nanostructures have not yet been well studied, high SERS activities of the nanostructures with hollow interiors have been exhibited in our report.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: Australian Institute for Bioengineering and Nanotechnology Publications
 
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