Counterion-activated nanoactuator: Reversibly switchable killing/releasing bacteria on polycation brushes

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题名:	Counterion-activated nanoactuator: Reversibly switchable killing/releasing bacteria on polycation brushes
作者:	黃俊仁;Huang, Chun-Jen;Chen, Yen-Sheng;Chang, Yung
贡献者:	工學院化學工程與材料工程學系
关键词:	ammonium;anions;Anti-Bacterial Agents - chemical synthesis;Anti-Bacterial Agents - chemistry;Anti-Bacterial Agents - pharmacology;bacteria;Bacterial Adhesion - drug effects;chemical elements;chlorides;contact angle;Escherichia coli;Escherichia coli - drug effects;Escherichia coli - physiology;films (materials);Methacrylates - chemical synthesis;Methacrylates - chemistry;Methacrylates - pharmacology;Polyamines - chemical synthesis;Polyamines - chemistry;Polyamines - pharmacology;polymerization;polymers;Staphylococcus epidermidis;Staphylococcus epidermidis - drug effects;Staphylococcus epidermidis - physiology;Stenotrophomonas maltophilia;Toothbrushing - instrumentation;wettability;X-ray photoelectron spectroscopy;zeta potential
日期:	2015-01-01
上传时间:	2026-04-21 14:31:17 (UTC+8)
出版者:	American Chemical Society;United States: American Chemical Society
摘要:	摘要： A strategy to release attached bacteria from surface-grafted bactericidal poly((trimethylamino)ethyl methacrylate chloride) (pTMAEMA) brushes has been proposed. The pTMAEMA brushes were fabricated via the surface-initiated atom transfer radical polymerization for contact killing of bacteria, including Escherichia coli, Staphylococcus epidermidis and Stenotrophomonas maltophilia. The bacteria-conditioning surfaces, afterward, were washed with electrolyte solutions containing anions with different lipophilic characteristic, charge density, polarity and adsorbility to quaternary ammonium groups in polymers. Because of the special ion-pairing interactions, the interfacial properties, including wettability and ζ-potential, can be manipulated in a controlled manner. Therefore, the counterion-assisted modulation of pTMAEMA brushes facilitates the bacterial release and regeneration of antimicrobial polymer films. The physicochemical properties of polymer brushes and their interactions with counterions were characterized using an ellipsometer, contact angle goniometer, X-ray photoelectron spectroscopy and an electrokinetic analyzer. The repetitive killing and releasing actions of pTMAEMA through unlocking and locking counterions were demonstrated, showing the robust effectiveness of the pTMAEMA-based nanoactuator in controlling the physical action by the chemical stimuli. The real-world implementation of the nanoactuator was demonstrated with a surgical scalpel by repelling killed bacteria and retaining reusability. 其他題名： ACS Appl. Mater. Interfaces 出版者： United States: American Chemical Society 出版日期： 2015-02-04 出處： ACS Applied Materials & Interfaces, 2015-02, Vol.7 (4), p.2415-2423 資源來源： American Chemical Society Journals 識別號： ISSN: 1944-8244 識別號： ISSN: 1944-8252 識別號： EISSN: 1944-8252 識別號： DOI: 10.1021/am507105r 識別號： PMID: 25608105
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