Characterization and application of dopamine stacking on oxide substrates

• Main Authors: Fu-Hsuan Yang, 楊馥瑄
• Other Authors: Shuchen Hsieh
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/4dfg8v

碩士 === 國立中山大學 === 化學系研究所 === 103 === Material surface engineering has attracted great interest in many applications, including electronics, biomedicine, biological materials and membranes. Current interest in films derived from the autoxidation of dopamine stems from their use as adhesion layer to direct facile surface medication. However, unsolved questions remain about the chemical identity of the polydopamine, their deposition kinetics and their mechanism. Here, we report properties of polydopamine films deposited on glass surfaces from solution at different pH and at time ranging from 1 to 72 hours. Data from X-ray photoelectron spectroscopy ( XPS ) and Ultraviolet-Visible Spectrometer ( UV-Vis ) suggest the presence of intermediate species in the polydopamine films at all deposition times. The XPS data provided chemical state information of the polydopamine films as a function of deposition time to propose the mechanism. The Ultraviolet-Visible Spectrometer ( UV-Vis ) analysis showed that the polydopamine film become thicker with the deposition time prolongation and the basic solution. The reducing ability of polydopamine toward metal ion, we attempted to use a polydopamine to reduce Au nanoparticles. We use X-ray Diffraction ( XRD )、Scanning Electron Microscope ( SEM )and Ultraviolet-Visible Spectrometer ( UV-Vis ) to analyze the Au nanoparticles. The XRD data further confirmed the formation of Au nanoparticles. The deposition of Au nanoparticles on the surfaces was checked by SEM. The UV-Vis and SEM analysis showed that the Au nanoparticles sizes was 75.3 ± 5.3 nm.