title: Room-temperature synthesis of two-dimensional ultrathin gold nanowire parallel array with tunable spacing.
abstract: A series of long-chain amidoamine derivatives with different alkyl chain lengths (CnAA where n is 12, 14, 16, or 18) were synthesized and studied with regard to their ability to form organogels and to act as soft templates for the production of Au nanomaterials. These compounds were found to self-assemble into lamellar structures and exhibited gelation ability in some apolar solvents. The gelation concentration, gel-sol phase transition temperature, and lattice spacing of the lamellar structures in organic solvent all varied on the basis of the alkyl chain length of the particular CnAA compound employed. The potential for these molecules to function as templates was evaluated through the synthesis of Au nanowires (NWs) in their organogels. Ultrathin Au NWs were obtained from all CnAA/toluene gel systems, each within an optimal temperature range. Interestingly, in the case of C12AA and C14AA, it was possible to fabricate ultrathin Au NWs at room temperature. In addition, two-dimensional parallel arrays of ultrathin Au NWs were self-assembled onto TEM copper grids as a result of the drying of dispersion solutions of these NWs. The use of CnAA compounds with differing alkyl chain lengths enabled precise tuning of the distance between the Au NWs in these arrays.
authors: Department of Industrial Chemistry, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan.
authors: Clara
authors: C
authors: Morita
authors: Hiromitsu
authors: H
authors: Tanuma
authors: Chika
authors: C
authors: Kawai
authors: Yuki
authors: Y
authors: Ito
authors: Yoshiro
authors: Y
authors: Imura
authors: Takeshi
authors: T
authors: Kawai
mesh_terms: D000588:Amines / Q000138:chemical synthesis* / Q000737:chemistry; D005782:Gels / Q000138:chemical synthesis / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D013696:Temperature
chemical_list: D000588:Amines; D005782:Gels; D006046:Gold