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Citation: ZHOU Guang-Ming, YU Dan-Ni, LI Si, YANG Da-Cheng. Adsorption of Leucine and Isoleucine on Core-Shell Au/Ag Nanoparticles[J]. Acta Physico-Chimica Sinica, ;2007, 23(09): 1478-1482. doi: 10.3866/PKU.WHXB20070933 shu

Adsorption of Leucine and Isoleucine on Core-Shell Au/Ag Nanoparticles

1.
School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, P. R. China

Received Date: 12 February 2007
Available Online: 8 June 2007

The Raman spectra and Surface enhanced Raman spectra (SERS) of leucine and isoleucine adsorbed on core-shell Au/Ag nanoparticles were obtained and assigned, and the different Raman peaks resulting from different vibrational models of the isomers忆groups were analysed. In Raman spectra, the leucine’s (ω(CH3)) is at 962, 945, 924 cm-1, (δas(CH3)) at 1408, 1454 cm-1; corresponding values for isoleucine are, 922 cm-1 and 1448, 1420, 1394 cm-1, respectwely. The difference in the peak positions of corresponding groups between leucine and isoleucine is more apparent in the SERS at acidic and basic conditions. The relationship between leucine and isoleucine’s concentration and SERS was interpreted preliminarily and the adsorption model on the core-shell Au/Ag nanoparticle surface was speculated.
- Leucine; Isoleucine; SERS; Core-shell Au/Ag nanoparticle
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