title: Stimuli-responsive supramolecular nanostructure from amphiphilic calix[4]arene and its three-dimensional dendritic silver nanostructure.
abstract: We synthesized a tetrameric amphiphilic molecule ( 1) based on a calix[4]arene building block that self-assembled into different tunable and stable aggregation structures at different pH values in aqueous solution. The amphiphilic calix[4]arene molecule ( 1) formed a spherical structure at pH 3. However, 1 formed a hollow necklacelike structure of 500 nm diameter at pH 7. These results indicate that the self-assembled morphologies of 1 are strongly dependent on pH values. In addition, a 3D dendritic silver nanostructure was obtained by the self-assembly of 1 at pH 7.
authors.affiliation: Department of Materials Science and Engineering, KAIST, Daejeon 305-701, South Korea.
authors.forename: Eun Jin
authors.initials: EJ
authors.lastname: Cho
authors.forename: Jeong Ku
authors.initials: JK
authors.lastname: Kang
authors.forename: Won Seok
authors.initials: WS
authors.lastname: Han
authors.forename: Jong Hwa
authors.initials: JH
authors.lastname: Jung
mesh_terms: D047250:Calixarenes / Q000737:chemistry*; D002942:Circular Dichroism; D003460:Crystallization; D004563:Electrochemistry / Q000379:methods; D006860:Hydrogen Bonding; D006863:Hydrogen-Ion Concentration; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D008956:Models, Chemical; D015394:Molecular Structure; D053758:Nanoparticles / Q000737:chemistry; D049329:Nanostructures / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods; D010636:Phenols / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D010636:Phenols; C121325:calix(4)arene; D047250:Calixarenes; D012834:Silver