Gold–silver bimetallic porous nanowires for surface-enhanced Raman scattering

Abstract

Highly porous bimetallic nanowires manufactured via a simple galvanic reaction have demonstrated superior activity in surface-enhanced Raman scattering, allowing ultrasensitive chemical detections on isolated porous nanowires in comparison to pristine silver nanowires.

Synthesis and catalytic properties of bimetallic nanomaterials with various architectures

“…For example, single-crystalline Au nanowires were synthesized by the reduction of HAuCl 4 using oleylamine or other reducing agents [100,101]; ultrathin Pt nanowires were obtained with the assistance of chromium hexacarbonyl [Cr(CO) 6 ] [102]. However, design of synthetic system to obtain one-dimensional bimetallic nanostructures is much more complicated due to the different nucleation and growth process of two distinct metals [103][104][105][106]. Our group has made some progress in solutionbased synthesis of ultrathin Au/Ag bimetallic nanowires [107].…”

Silver nanowires-based signal amplification for CdSe quantum dots electrochemiluminescence immunoassay

“…(Yaghi et al, 2003;Bruce et al, 2008;Hatchett and Josowicz, 2008;Park, et al, 2004;Wang et al, 2005). Silver nanowires have received much attention and inspired intensive research efforts for their intriguing electrical and optical properties (Fang et al, 2011;Netzer et al, 2011). It is reported that the Ag-cysteine hybrid nanowires were used as amplified signal labels in the chemiluminescent detection of cancer biomarkers (Chen, et al, 2013).…”

Synthesis and Applications of One-Dimensional Porous Nanowire Arrays: A Review

“…Upon etching in nitric acid, Ag atoms from both the interior and the surface layer of the composite nanostructure can be controllably leached out, leaving behind metallic nanotubes with a well-de¯ned porous wall structure. Afterward, Netzer et al 89 developed a two-step dealloy-free route to manufacture highly porous gold-silver bimetallic porous nanowires via a simple galvanic replacement reaction at room temperature. In their method, Ag nanowires were also synthesized¯rst using a polyol method and deposited onto a targeted substrate.…”