Corresponding Author

Qi-ling ZHONG(zhqiling@163.com)


By using Au nanoparticles with a diameter of 55 nm as the core and ascorbic acid as the reductant, Aucore@ Ptshell nanoparticles of controllable Pt shell thickness( 0. 3 ~ 6 nm) were synthesized by controlling the concentration of [PtCl6]2 - ions. The ultraviolet-visible absorption spectrometry,scanning electron microscope ( SEM) ,transmission electron microscope ( TEM) ,high resolution transmission electron microscope ( HRTEM) , and electrochemical cyclic voltammetry were employed to determine surface morphology and structure of Aucore@ Ptshell. With SCN - ion as a probe,the effect of the thickness of the Pt shell on the SERS signals of Aucore@ Ptshell nanoparticles was investigated. It was found that the intensities of SERS signals decreased exponentially with the increase of Pt shell thickness. The result revealed that at a shell thickness of 1. 4 nm,the core-shell nanoparticles present the chemical property of the Pt shell and having a large SERS activity.


Au@ Pt nanoparticles, controllable preparation, SERS activity

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[1]Zou S Z,Williams C T,Chen E K Y,et al.Probing mo-lecular vibrations at catalytically significant interfaces:anew ubiquity of surface-enhanced Raman scattering[J].J Am Chem Soc,1998,120(15):3811-3812.
[2]Mrozek M F,Xie Y,Weaver M J.Surface-enhanced Ra-man scattering on uniform Platinum-group overlayers:preparation by redox replacement of underpotential-de-posited metals on gold[J].Anal Chem,2001,73(24):5953-5960.
[3]Park S,Yang P X,Corredor P,et al.Transition metal-coated nanoparticle films:Vibrational characterization with surface-enhanced Raman scattering[J].J Am Chem Soc,2002,124(11):2428-2429.
[4]Zhang B,Li J F,Zhong Q L,et al.Electrochemical and surfaced-enhanced Raman spectroscopic investigation of CO and SCN-adsorbed on Aucore-Ptshell nanoparticles supported on GC electrodes[J].Langmuir,2005,21(16):7449-7455.
[5]Li J F(李剑锋),Hu J W(胡家文),Ren B(任斌),et al.Tuning the SERS activity of Au@Pd core-shell nano-particles by controlling the thickness of the Pd shell[J].Acta Phys-Chim Sin(物理化学学报),2005,21(8):825-828.
[6]Rao G S(饶贵仕),Fan F R(范凤茹),Wang G F(王国富),et al.In-situ SERS of formic acid electro-catalyt-ic oxidation on Aucore@Ptshell/Pt electrode[J].Acta Phy-Chim Sin(物理化学学报),2008,24(2):345-349.
[7]Henglein A.Colloidal Palladium nanoparticles:reduction of Pd(II)by H2;PdCoreAuShellAgShell particles[J].J Phys Chem B,2000,104(29):6683-6685.
[8]Lambert D K.Stark effect of adsorbate vibrations[J].Solid State Commun,1984,51(5):297-300.
[9]Gans P,Gill J B,Fearnley D P.Spectrochemistry of so-lutions.Part14.Raman and infrared spectra of thiocya-natosilver(I)complexes in some non-aqueous solutions[J].J Chem Soc,Dalton Trans,1987(7):1708-1713.
[10]Zhang Y(张勇).Synthesis and SERS characterize-ation of platinum nanoparticles of different shape[D].Xiamen:Xiamen University,2005.



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