Adsorption of leucine and isoleucine on core-shell Au/Ag nanoparticles

作者：Zhou Guang Ming^*; Yu Dan Ni; Li Si; Yang Da Cheng

来源：Acta Physico - Chimica Sinica, 2007, 23(9): 1478-1482.

• leucine
• isoleucine
• SERS
• core-shell Au/Agnanoparticle

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' groups were analysed. In Raman spectra, the leucine's (omega(CHO3)) is at 962, 945, 924 cm(-1), (delta(as)(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.

• 出版日期2007-9
• 单位西南大学