![]() ![]() Data derived from Scopus using keywords ‘core’ and ‘shell’. 1 Hubenthal, F., Borg, N., and Trger, F., 2008: Optical properties and ultrafast electron dynamics in gold-silver alloy and core-shell nanoparticles. ![]() Number of publications on core-shell particles. These particles themselves have been of various shapes as well. View PDF View article View in Scopus Google. The core has comprised single particles or multiple ones, and shells that have been studied have been continuous, multi-layered, or discontinuous domains. email protected 2 core-shell nanocomposite nanowires. The results provide insight into the manipulation of the electronic and stability properties for gold- and silver-based nanoparticles. Gold and silver nanoparticles toxicity is strongly dependent on nanoparticle size, functionalization, morphology, cell type, duration, and frequency of exposure, among others. Raman analysis of the reporter molecule 3-amino-1,2,4-triazole-5-thiol adsorbed on the particle surface illustrates the feasibility of using gold coated by silver nanoparticle probes in sensing applications that require the presence of high levels of salt. Bimetallic Core-Shell Nanoparticles of Gold and Silver via Bioinspired Polydopamine Layer as Surface-Enhanced Raman Spectroscopy (SERS) Platform Despite numerous attempts to fabricate the core-shell nanoparticles, novel, simple, and low-cost approaches are still required to produce these efficient nanosystems. The results are discussed in terms of particle composition, structure and morphology before and after exposing the particles to the electrolytes. ![]() It was found that a critical silver shell thickness of approximately 1 nm exists that cannot be oxidatively etched from the particle surface: this is in contrast to the observation of complete oxidative etching for monometallic silver nanoparticles. In order to probe the phenomenon, the stability of gold nanoparticles coated by silver was studied in the presence of various chloride-containing electrolytes. For this, firstly, we prepared the citrate-stabilized gold nanoparticles (AuNPs), and then AuNPs were coated with a thin layer of PDOP simply by the oxidative polymerization of dopamine. Silver nanoparticles are notoriously susceptible to oxidation, yet gold nanoparticles coated in silver exhibit a unique electronic interaction that occurs at the interface of the two metals, leading to enhanced stability properties for the silver shell. Here, for the first time, we report the novel synthesis of bimetallic coreshell nanoparticles of gold and silver via bioinspired polydopamine (PDOP) layer. ![]()
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