聚合物
表面改性
共价键
力谱学
非共价相互作用
胶粘剂
材料科学
化学
分子
表征(材料科学)
化学工程
高分子科学
高分子化学
纳米技术
原子力显微镜
氢键
有机化学
复合材料
图层(电子)
工程类
作者
Peyman Delparastan,Katerina G. Malollari,Haeshin Lee,Phillip B. Messersmith
标识
DOI:10.1002/ange.201811763
摘要
Abstract Inspired by the adhesive proteins of mussels, polydopamine (pDA) has emerged as one of the most widely employed materials for surface functionalization. Despite numerous attempts at characterization, little consensus has emerged regarding whether pDA is a covalent polymer or a noncovalent aggregate of low molecular weight species. Here, we employed single‐molecule force spectroscopy (SMFS) to characterize pDA films. Retraction of a pDA‐coated cantilever from an oxide surface shows the characteristic features of a polymer with contour lengths of up to 200 nm. pDA polymers are generally weakly bound to the surface through much of their contour length, with occasional “sticky” points. Our findings represent the first direct evidence for the polymeric nature of pDA and provide a foundation upon which to better understand and tailor its physicochemical properties.
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