Increasing the Mechanical Stability of Polymer-Gold Interfacial Connection: A Parallel Covalent Strategy
SCIE
SCOPUS
- Title
- Increasing the Mechanical Stability of Polymer-Gold Interfacial Connection: A Parallel Covalent Strategy
- Authors
- Ma, Ziwen; Zhang, Honglin; Song, Yu; Mei, Qiuping; Shi, Pengju; Park, Joon Won; Zhang, Wenke
- Date Issued
- 2023-04
- Publisher
- AMER CHEMICAL SOC
- Abstract
- Thiol-gold (S-Au) chemistry has been widely used in coating and functionalizing gold surfaces because it is robust and highly efficient. However, recent studies have shown that the S-Au-based self-assembled monolayers can lead to significant instability under external mechanical loading (e.g., in a swelled polymer film). Such instability limits further applications of S-Au chemistry-based functional materials. Here, we report a surface-modifying procedure based on a parallel covalent strategy. By employing dendritic macromolecules as a "middle layer" between the gold surface and polymer, the interfacial connecting strength increased by at least 350% as revealed by atomic force microscopy-based single molecule force spectroscopy (AFM-SMFS). The ultimate cleavage structure is confirmed to be an amide bond by control SMFS experiments, fluorescent microscopy, and dynamic force spectroscopy. This study/concept paves the way to prepare stable stimuli-responsive polymer brushes on solid surfaces and study mechanophores with high force stability.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/123636
- DOI
- 10.1021/acsmacrolett.3c00058
- ISSN
- 2161-1653
- Article Type
- Article
- Citation
- ACS MACRO LETTERS, vol. 12, no. 4, page. 421 - 427, 2023-04
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