Au@Cu Nanoarrays with Uniform Long-Range Ordered Structure: Synthesis and SERS Applications

Abstract

The nanostructures with uniform long-range ordered structure are of crucial importance for performance standardization of high-quality surface-enhanced Raman scattering (SERS) spectra. In this paper, we described the fabrication and SERS properties of Au decorated Cu (Au@Cu) nanoarrays. The Cu nanoarrays with uniform long-range ordered structure were first synthesized by in-situ electrochemistry assembly on insulated substrate. The Cu nanoarrays can reach a size of centimeters with strictly periodic nano-microstructure, which is beneficial for the production and performance standardization of SERS substrates. Then Au nanoparticals were decorated on the Cu nanoarrays by galvanic reaction without any capping agent. The obtained Au@Cu nanoarrays exhibit excellent SERS activity for 4-Mercaptopyridine, and the sensitivity limit is as low as 10−8 M. Therefore, this facile route provides a useful platform for the fabrication of SERS substrates based on nano ordered arrays.

Magnetic-Field-Enhanced H2S Sensitivity of Cu2O/NiO Heterostructure Ordered Nanoarrays

“…A 2D electrodeposition in situ assembly method similar to that in our previous reports − was used to synthesize Cu 2 O/NiO heterostructure ordered nanoarrays. The schematic diagram of the electrodeposition system is shown in Figure .…”

Spark discharge deposition of au/cu nanoparticles for surface‐enhanced Raman scattering

“…Specifically, AuCu bimetallic NPs have been of great interest in SERS application because they have enhanced localized surface plasmon resonance due to the electromagnetic coupling effect which depends on the Au: Cu atomic ratio 10 . Various chemical and physical methods have been established to prepare AuCu NPs for SERS application 10–14 . Some of these methods requires long reaction time, high reaction temperatures, templates, and harmful organic reagents, which make the synthesis procedures expensive and not appropriate for scale up generation.…”