Department of Chemistry, Research Institute for Convergence of Basic sciences, Hanyang University, Seoul, Republic of Korea.
Biosens Bioelectron. 2011 Sep 15;27(1):183-6. doi: 10.1016/j.bios.2011.06.011. Epub 2011 Jun 17.
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.
一种由简单的电化学合成方法构建的三维（3D）金（Au）纳米树枝状网络多孔结构，在本研究中展示了其在敏感电化学测量中的应用。通过在铂表面上电沉积 Au，并在同一表面产生的氢气泡的作用下，在铂表面上构建了 3D 纳米树枝状网络多孔结构。碘化物作为共试剂，通过阻止 Au 进一步生长成更大的聚集体以及抑制相邻纳米树枝的融合，在纳米树枝状网络的构建中发挥了重要作用。构建了包含该结构的电化学传感器，并用于检测超低浓度范围内的 As(III)。为了进行比较，还制备了裸金和金纳米颗粒掺入的电极。使用 3D 纳米树枝状网络多孔结构，由于其较大的表面积，对 As(III)的检测更加敏感。
