title: Electrochemical fabrication of two-dimensional palladium nanostructures as substrates for surface enhanced Raman scattering.
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.
authors.affiliation: 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.
authors.forename: Yin
authors.initials: Y
authors.lastname: Li
authors.forename: Gewu
authors.initials: G
authors.lastname: Lu
authors.forename: Xufeng
authors.initials: X
authors.lastname: Wu
authors.forename: Gaoquan
authors.initials: G
authors.lastname: Shi
mesh_terms: D004563:Electrochemistry; D004566:Electrodes; D008855:Microscopy, Electron, Scanning; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010165:Palladium / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D011758:Pyrroles / Q000737:chemistry; D012996:Solutions; D013059:Spectrum Analysis, Raman; D014961:X-Ray Diffraction
chemical_list: D011108:Polymers; D011758:Pyrroles; D012996:Solutions; C067635:polypyrrole; D010165:Palladium