Molecular Composition, Grafting Density and Film Area Affect the Swelling-Induced Au-S Bond Breakage
文献类型：期刊论文
| 作者 | Ma HW(马宏伟)
|
| 刊名 | ACS APPLIED MATERIALS & INTERFACES
 |
| 出版日期 | 2014-06-11 |
| 卷号 | 6期号:11页码:8313-8319 |
| 关键词 | polymer brush Au-S bond swelling behavior functional surface mechanochemistry surface buckling |
| 通讯作者 | 马宏伟 |
| 英文摘要 | In previous studies, we reported the first observation of the Au-S bond breakage induced mechanically by the swelling of the saline (PBS), a phenomenon with broad applications in the fields of surface-tethered weak polyelectrolyte brushes in phosphate buffered biosensors and functional surfaces. In this study, three factors, namely the molecular composition, grafting density and film area of the weak polyelectrolyte, carboxylated poly(oligo(ethylene glycol) methacrylate-random-2-hydroxyethyl methacrylate) (poly(OEGMA-r-HEMA)), were studied systematically on how they affected the swelling-induced Au-S bond breakage (ABB). The results showed that, first, the swelling-induced ABB is applicable to a range of molecular compositions and grafting densities; but the critical thickness (T-critical,T-dry) varied with both of the two factors. An analysis on the swelling ratio further revealed that the difference in the T-critical,T-dry arose from the difference in the swelling ability. A film needed to swell to similar to 250 nm to induce ABB regardless of its composition or structure, thus a higher swelling ratio would lead to a lower T-critical,T-dry value. Then, the impact of the film area was studied in micrometer- and sub-micrometer-scale brush patterns, which showed that only partial, rather than complete ABB was induced in these microscopic films, resulting in buckling instead of film detaching. These results demonstrated that the ABB is suitable to be used in the design of biosensors, stimulus-responsive materials and mechanochemical devices. Although the >160 mu m(2) required area for uniform ABB hinders the application of ABB in nanolithography, the irreversible buckling provides a facile method of generating rough surfaces. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000337336900043 |
| 公开日期 | 2014-12-05 |
| 源URL | [http://ir.sinano.ac.cn/handle/332007/1657]  |
| 专题 | 苏州纳米技术与纳米仿生研究所_纳米生物医学与安全研究部_马宏伟团队 |
| 推荐引用方式 GB/T 7714 | Ma HW. Molecular Composition, Grafting Density and Film Area Affect the Swelling-Induced Au-S Bond Breakage[J]. ACS APPLIED MATERIALS & INTERFACES,2014,6(11):8313-8319. |
| APA | Ma HW.(2014).Molecular Composition, Grafting Density and Film Area Affect the Swelling-Induced Au-S Bond Breakage.ACS APPLIED MATERIALS & INTERFACES,6(11),8313-8319. |
| MLA | Ma HW."Molecular Composition, Grafting Density and Film Area Affect the Swelling-Induced Au-S Bond Breakage".ACS APPLIED MATERIALS & INTERFACES 6.11(2014):8313-8319. |
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