Science Department, University of Basilicata , Viale dell'Ateneo Lucano, 10-Potenza, Italy.
Department of Mechanical Engineering Sciences, University of Surrey , Guildford, Surrey, GU2 7XH, U.K.
Langmuir. 2017 Mar 14;33(10):2504-2513. doi: 10.1021/acs.langmuir.6b04335. Epub 2017 Feb 28.
The electrochemical oxidation of ortho-aminophenol (oAP) by cyclic voltammetry (CV), on platinum substrates in neutral solution, produces a polymeric film (PoAP) that grows to a limiting thickness of about 10 nm. The insulating film has potential use as a bioimmobilizing substrate, with its specificity depending on the orientation of its molecular chains. Prior investigations suggest that the film consists of alternating quinoneimine and oAP units, progressively filling all the platinum sites during the electrosynthesis. This work concerns the evaluation of the growth orientation of PoAP chains, which until now was deduced only from indirect evidence. Atomic force microscopy (AFM) has been used in situ with an electrochemical cell so that PoAP deposition on a specific area can be observed, thus avoiding any surface reorganization during ex situ transport. In parallel with microscopy, XPS experiments have been performed using cluster ion beams to profile this film, which is exceptionally thin, without damage while retaining molecular information.
电化学循环伏安法在中性溶液中氧化邻氨基酚（oAP）在铂基底上产生聚合膜（PoAP），其厚度生长至约 10nm 的极限厚度。这种绝缘膜具有作为生物固定化基底的潜在用途，其特异性取决于其分子链的取向。先前的研究表明，该膜由交替的醌亚胺和 oAP 单元组成，在电合成过程中逐渐填满所有的铂位。这项工作涉及到对 PoAP 链生长取向的评估，迄今为止，这只能从间接证据中推断出来。原子力显微镜（AFM）已与电化学池原位结合使用，以便可以观察到 PoAP 在特定区域上的沉积，从而避免在异位传输过程中发生任何表面重组。与显微镜平行，使用团簇离子束进行 XPS 实验，以对该非常薄的薄膜进行轮廓分析，而不会损坏同时保留分子信息。
