Fabrication of pH sensitive nanovalves using smart surface coated nanopores

[摘要] A pH sensitive nanovalve was fabricated using different smart surfaces covalently attached to an anodized aluminium oxide membrane (AAO). The smart surfaces were synthesized using a mixture of aliphatic and aminated silanes. Effect on the contact angle of the aliphatic silane chain length was evaluated. The smart surface, in conjunction with a nanoporous membrane, allowed the formation of a hydrophobic plug which controlled the transport of the molecule safranine depending on the pH of the solution. It was demonstrated that mixtures of butyl and methyl-trimethoxysilane with aminopropyl-trimethoxysilane were able to perform as effective nanovalves creating a plug that remained closed at pH>7 and opened up at pH

[发布机构] Universidad Industrial de Santander, Bucaramanga, Colombia^1

[效力级别] 化学

[关键词] Aminopropyl;Anodized aluminium oxides;Methyl trimethoxysilane;Nanoporous membrane;Nanovalves;pH sensitive;Smart surfaces;Trimethoxysilane