Electrochemical fabrication of two-dimensional palladium nanostructures as substrates for surface enhanced Raman scattering |
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Authors: | Li Yin Lu Gewu Wu Xufeng Shi Gaoquan |
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Institution: | Department of Chemistry and Key Lab of Bio-organic Phosphorus and Biochemistry of Education Commission of China, Tsinghua University, Beijing 100084, People's Republic of China. |
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Abstract: | Two-dimensional palladium (Pd) nanostructures have been fabricated by electrochemical deposition of Pd onto an indium tin oxide glass substrate modified with a thin flat film of polypyrrole or a nanofibril film of polyaniline. The experimental results demonstrated that the morphology of Pd nanoparticles strongly depended on the properties of conducting polymers and the conditions of electrochemical deposition. Two-dimensional nanostructures composed of flower-like (consisting of staggered nanosheets) or pinecone-like Pd nanoparticles were successfully synthesized. They can be used as substrates for surface-enhanced Raman scattering after partly decomposing the polymer components by heating in air, and the enhancement factor of the substrate composed of flower-like Pd nanoparticles was measured to be as high as 105 for 4-mercaptopyridine. |
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