Holey Gold Nanowires Formed by Photoconversion of Dissipative Nanostructures Emerged at the Aqueous–Organic Interface

Abstract

Gold nanowires are obtained by photoreduction of linear self‐assemblies formed from Au(OH)4− and tetra‐alkyl ammonium ions at the water–chloroform interface. They are dissipative nanostructures formed only under non‐equilibrium conditions, which require continuous vectorial transport of ammonium ions across the interface. Nanocavities are observed in nanowires at almost regular intervals, which is a salient feature of dissipative structures.

Facile interfacial synthesis of large sized 3D gold spherical architectures with strong individual particle SERS response and high reproducibility

“…[30][31][32][33][34][35][36][37][38][39][40][41][42] For example, Rao et al 30,32 obtained Au, Au-Ag, Au-Cu, and Au-Ag-Cu ultrathin nanocrystalline films with spherical nanoparticles as building blocks at the toluene-water interface by using tetrakis hydroxymethyl phosphonium chloride (HPLC) as a reducing agent. [30][31][32][33][34][35][36][37][38][39][40][41][42] For example, Rao et al 30,32 obtained Au, Au-Ag, Au-Cu, and Au-Ag-Cu ultrathin nanocrystalline films with spherical nanoparticles as building blocks at the toluene-water interface by using tetrakis hydroxymethyl phosphonium chloride (HPLC) as a reducing agent.…”

Dendritic nanofibers of gold formed by the electron transfer at the interface between water and a highly hydrophobic ionic liquid

“…11 Soejima et al utilized linear aggregates of tetrabutylammonium Au OH ion pairs formed at chloroform|W interface for the photoreductive formation of holey Au nanowires. 12 In the present study, we will introduce another nanostructure, dendritic nanofibers of gold, that are formed by the electron transfer at another kind of liquid-liquid interface where we used a highly hydrophobic ionic liquid IL instead of molecular organic solvents oil .…”

Ionic liquid-based stable nanofluids containing gold nanoparticles

“…The broadened SPR peaks of samples 2, 3, 4, and 5 are red-shifted to 600-700 nm compared to that of sample 1 as shown in Fig. 1b, indicating that gold clustering occurred during the fabrication processes or the nanowires were obtained [64][65][66]. Therefore, the Au NPs are homogenously dispersed in sample 1 but aggregated in some extent in samples 2, 3, 4, and 5.…”

“…3b. The strong peak of Au at 2.12 keV is characteristic of Au NPs [66], along with the C, N, and O signatures. The C and N signals are assigned to the CTABr molecules, experimentally verifying that the Au NPs are coated by CTABr.…”