One-step Synthesis of Shape-controllable Gold Nanoparticles and Their Application in Surface-enhanced Raman Scattering
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2013年第7期
论文作者：Lanlan Sun Dongxu Zhao Meng Ding Haifeng Zhao Zhenzhong Zhang Binghui Li Dezhen Shen
文章页码：613 - 618
摘 要：<正>Gold nanoparticles（NPs） of various shapes were synthesized by a one-step method at ambient temperature in the presence of NaCI.2-mercaptosuccinic acid（MSA） was used as both reducing agent and stabilizing agent.The shapes of gold NPs were controllable by simply tuning S/Au ratio（S is from MSA molecule,and S/Au ratio is controlled by tuning the volume of added MSA solution）,and triangle,polygonal and spherical nanoparticles were obtained.This result suggested a new way to consider the effects of MSA on the growth of nanoparticles,which showed that MSA is a strong capping agent and facilitates more uniform growth of nanoparticles in every dimension.And other important factors on nanoparticles growth including NaCI and temperature were discussed.Furthermore,a typical probe molecule,4-aminothiophenol（4-ATP） was used to test the surface-enhanced Raman scattering（SERS） activity of these gold NPs and the results indicated good Raman activity on these substrates.And the enhancement factor（EF） at 1078 cm-1（a1） was estimated to be as large as 6.3×104 and 5.5×104 for triangular plates and truncated particles,respectively.
Lanlan Sun，Dongxu Zhao，Meng Ding，Haifeng Zhao，Zhenzhong Zhang，Binghui Li，Dezhen Shen
State Key Laboratory of Luminescence and Applications,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences
摘 要：<正>Gold nanoparticles（NPs） of various shapes were synthesized by a one-step method at ambient temperature in the presence of NaCI.2-mercaptosuccinic acid（MSA） was used as both reducing agent and stabilizing agent.The shapes of gold NPs were controllable by simply tuning S/Au ratio（S is from MSA molecule,and S/Au ratio is controlled by tuning the volume of added MSA solution）,and triangle,polygonal and spherical nanoparticles were obtained.This result suggested a new way to consider the effects of MSA on the growth of nanoparticles,which showed that MSA is a strong capping agent and facilitates more uniform growth of nanoparticles in every dimension.And other important factors on nanoparticles growth including NaCI and temperature were discussed.Furthermore,a typical probe molecule,4-aminothiophenol（4-ATP） was used to test the surface-enhanced Raman scattering（SERS） activity of these gold NPs and the results indicated good Raman activity on these substrates.And the enhancement factor（EF） at 1078 cm-1（a1） was estimated to be as large as 6.3×104 and 5.5×104 for triangular plates and truncated particles,respectively.
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