title: Anionic-cationic switchable amphoteric monodisperse mesoporous silica nanoparticles.
abstract: 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.
authors.affiliation: School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, PR China.
authors.forename: Yanhang
authors.initials: Y
authors.lastname: Ma
authors.forename: Lei
authors.initials: L
authors.lastname: Xing
authors.forename: Haoquan
authors.initials: H
authors.lastname: Zheng
authors.forename: Shunai
authors.initials: S
authors.lastname: Che
mesh_terms: D000838:Anions / Q000737:chemistry; D002412:Cations / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D053758:Nanoparticles / Q000737:chemistry*; D016062:Porosity; D012822:Silicon Dioxide / Q000138:chemical synthesis / Q000737:chemistry*; D013499:Surface Properties; D013501:Surface-Active Agents / Q000138:chemical synthesis / Q000737:chemistry
chemical_list: D000838:Anions; D002412:Cations; D013501:Surface-Active Agents; D012822:Silicon Dioxide