School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, PR China.
Langmuir. 2011 Jan 18;27(2):517-20. doi: 10.1021/la103979c. Epub 2010 Dec 17.
Anionic-cationic switchable monodisperse mesoporous silica nanoparticles were synthesized by one-pot amino and carboxylic acid bifunctionalization based on the self-assembly of the surfactant, two types of co-structure-directing agents containing amino and carboxylic groups, and silica sources. These nanoparticles revealed properties of dispersity and reversibility, with the advantage of the pH-responsive anionic-cationic/acid-base switchability. It was demonstrated that the extracted materials achieved reutilization and controllable dispersity in aqueous solution by adjusting the static electric power among the particles during the switching process.
阴离子-阳离子可切换单分散介孔硅纳米粒子通过一锅法合成，基于表面活性剂、两种含氨基和羧基的共结构导向剂以及硅源的自组装。这些纳米粒子表现出分散性和可逆性的特性，具有 pH 响应的阴离子-阳离子/酸碱可切换性的优点。结果表明，通过在切换过程中调整颗粒间的静电力，可以实现提取材料的再利用和在水溶液中的可控分散性。
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