Molecular Design of Conductor Surfaces

通过测量纳米薄膜包覆石英晶体谐振器的机电阻抗，分析了纳米薄膜包覆石英晶体谐振器在Os(bpy)_3^<2+>负载过程中的质量和流变学变化，以及纳米薄膜在乙酸钠缓冲液中电化学氧化时的弹射。用Os(bpy)_3^<2+>将Nafion加载至饱和，使膜的质量和刚度增加。双荷电Os(bpy)_3^<2+>的静电交联可能是刚性增加的原因。在饱和涂层的第一次阳极氧化过程中，由于Os(bpy)_3络合物从涂层中喷出，膜质量下降。经过一个或两个伏安循环后，涂层/溶液界面上的离子电流由Na^+离子的循环喷射和注入引起。用石英晶体谐振器研究了聚丁烯与阴离子两亲体组成的离子络合膜在氯化钠水溶液中的电化学行为。nacl浓度在0.05 ~ 0.1 M范围内，还原膜的行为和可见光谱发生了较大的变化，表明膜的结构发生了变化。聚吡咯薄膜在D_2O介质中的电化学行为与在H_2O介质中的电化学行为不同。氧化后膜肿胀，在D_2O介质中肿胀程度更大。这种差异可能是由于聚吡咯与溶剂之间的相互作用不同。

Mass and rheological changes of Nafion films deposited on a gold-coated quartz crystal resonator during their loading with Os(bpy)_3^<2+> and its ejection during electrochemical oxidation in sodium acetate buffers were analyzed on the basis of measurements of the electromechanical impedance of the Nafion film-coated resonator. Loading of the Nafion to saturation with Os(bpy)_3^<2+> caused increases in the mass and the rigidity of the film. Electrostatic cross-linking by the doubly-charged Os(bpy)_3^<2+> may be responsible for the rigidity increase. During the first anodic oxidation of the saturated coating, the film mass decreased as Os(bpy)_3 complex was ejected from the coating. After one or two voltammetric cycles a steady state was achieved in which the ionic current at the coating/solution interface was caused by the cyclic ejection and injection of Na^+ ion.Electrochemical behavior of ion complex films consisting of poly (butyleneviologen) and an anionic amphiphile was studied in NaClO_4 aqueous solutions using quartz crystal resonator. The behavior as well as a visible spectrum of the reduced film changed largely at a NaClO_4 concentration range between 0.05 and 0.1 M,indicating that the film structure changed.Electrochemical behavior of polypyrrole films in D_2O media was different from that in H_2O media. Upon oxidation, the films were swollen, and the degree of swelling was larger in D_2O media. This difference may be ascribable to different interaction between polypyrrole and the solvents.