title: A three-dimensional gold nanodendrite network porous structure and its application for an electrochemical sensing.
abstract: A three dimensional (3D) gold (Au) nanodendrite network porous structure constructed by a simple electrochemical synthetic method has been presented, and its utility for sensitive electrochemical measurement was demonstrated in this study. The 3D nanodendrite network porous structure was constructed on a platinum surface through electrodeposition of Au under the presence of hydrogen bubbles generated from the same surface. Iodide, used as a co-reagent, played an important role in the construction of the nanodendrite network by preventing continual growth of Au into larger agglomerates as well as inhibiting coalescence of neighboring nanodendrites. An electrochemical sensor incorporating the structure was built and used to detect As(III) in ultra low concentration range. For the purpose of comparison, bare gold and gold nanoparticle-incorporated electrodes were also prepared. With the use of 3D nanodendrite network porous structure, a much more sensitive detection of As(III) was possible due to its large surface area.
authors.affiliation: Department of Chemistry, Research Institute for Convergence of Basic sciences, Hanyang University, Seoul, Republic of Korea.
authors.forename: Tran Ngoc
authors.initials: TN
authors.lastname: Huan
authors.forename: Thothadri
authors.initials: T
authors.lastname: Ganesh
authors.forename: Kwang Soo
authors.initials: KS
authors.lastname: Kim
authors.forename: Saetbyeol
authors.initials: S
authors.lastname: Kim
authors.forename: Sung-Hwan
authors.initials: SH
authors.lastname: Han
authors.forename: Hoeil
authors.initials: H
authors.lastname: Chung
mesh_terms: D001151:Arsenic / Q000032:analysis* / Q000737:chemistry; D055664:Electrochemical Techniques; D006046:Gold / Q000737:chemistry*; D007454:Iodides / Q000737:chemistry; D057230:Limit of Detection; D053758:Nanoparticles / Q000737:chemistry; D058608:Nanopores; D010984:Platinum / Q000737:chemistry*
chemical_list: D007454:Iodides; D010984:Platinum; D006046:Gold; D001151:Arsenic