2017年2月16日
Ion-Specific Modulation of Interfacial Interaction Potentials between Solid Substrates and Cell-Sized Particles Mediated via Zwitterionic, Super-Hydrophilic Poly(sulfobetaine) Brushes
Journal of Physical Chemistry B
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- 巻
- 121
- 号
- 6
- 開始ページ
- 1396
- 終了ページ
- 1404
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1021/acs.jpcb.6b11540
- 出版者・発行元
- American Chemical Society
Zwitterionic polymer brushes draw increasing attention not only because of their superhydrophilic, self-cleaning capability but also due to their excellent antifouling capacity. We investigated the ion-specific modulation of the interfacial interaction potential via densely packed, uniform poly(sulfobetaine) brushes. The vertical Brownian motion of a cell-sized latex particle was monitored by microinterferometry, yielding the effective interfacial interaction potentials V(Δh) and the autocorrelation function of height fluctuation. The potential curvature V″(Δh) exhibited a monotonic increase according to the increase in monovalent salt concentrations, implying the sharpening of the potential confinement. An opposite tendency was observed in CaCl2 solutions, suggesting that the ion specific modulation cannot be explained by the classical Hofmeister series. When the particle fluctuation was monitored in the presence of free sulfobetaine molecules, the increase in [sulfobetaine] resulted in a distinct increase in hydrodynamic friction. This was never observed in all the other salt solutions, suggesting the interference of zwitterionic pairing of sulfobetaine side chains by the intercalation of sulfobetaine molecules into the brush layer. Furthermore, poly(sulfobetaine) brushes exhibited a very low V″(Δh) and hydrodynamic friction to human erythrocytes, which seems to explain the excellent blood repellency of zwitterionic polymer materials.
- リンク情報
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- DOI
- https://doi.org/10.1021/acs.jpcb.6b11540
- J-GLOBAL
- https://jglobal.jst.go.jp/detail?JGLOBAL_ID=201702240410371539
- PubMed
- https://www.ncbi.nlm.nih.gov/pubmed/28122185
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000394482400024&DestApp=WOS_CPL
- URL
- https://pubs.acs.org/doi/pdf/10.1021/acs.jpcb.6b11540
- Scopus Url
- http://www.scopus.com/inward/record.url?eid=2-s2.0-85019938349&partnerID=MN8TOARS
- ID情報
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- DOI : 10.1021/acs.jpcb.6b11540
- ISSN : 1520-5207
- ISSN : 1520-6106
- eISSN : 1520-5207
- J-Global ID : 201702240410371539
- ORCIDのPut Code : 36505304
- PubMed ID : 28122185
- SCOPUS ID : 85019938349
- Web of Science ID : WOS:000394482400024