Direct solution synthesis of Pd nanowire networks and their application in surface-enhanced Raman scattering

Abstract

Highly branched Pd 2D nanowire networks are prepared by a template- and surfactant-free method in an ethylene glycol (EG)-dimethyl sulfoxide (DMSO) mixture under mild conditions. Pd nanowire networks with lengths ranging from hundreds of nanometers to several micrometers and branches with uniform diameters of ∼8 nm are grown. The most likely formation mechanism is also proposed. The as-produced Pd nanowire networks exhibit high surface-enhanced Raman scattering activity for 4-mercaptopyridine probe molecules with 5.0 × 10(-8) M concentration.

A Possible Oriented Attachment Growth Mechanism for Silver Nanowire Formation

“…The nanowires were inherently unstable in the reaction and quickly converted to the spherical particles, but can be conveniently harvested by quenching the reaction with rapid cooling. 52 Palladium polycrystalline nanowires produced in ethylene glycol (EG)-dimethyl sulfoxide (DMSO) 53 or tetraoctadecylammonium bromide 54 have also reported.…”

Synthesis of copper sulfide nanowire bundles in a mixed solvent as a cathode material for lithium-ion batteries

“…Otherwise, the products proved to be irregular particles. This may be caused by the special chemical and physical properties of EG and DMSO [37]. Just by changing the ratio of the solvent, we can control the final shape of the CuS, which avoids complicated processes and special instruments and is convenient for preparing nanowires.…”

Surfactant-free solution-based synthesis of metallic nanoparticles toward efficient use of the nanoparticles’ surfaces and their application in catalysis and chemo-/biosensing

“…Networks of highly branched 2D Pd nanowires were prepared by Feng et al via a template-and surfactantfree method using an EG/dimethyl sulfoxide (DMSO) mixture under mild conditions [51] . In a typical synthesis procedure, 0.0224 g of Pd(CH 3 CO) 2 was added to 2 ml of DMSO and 23 ml of EG in a three-necked flask and refluxed at 120 ° C for 3 h. The as-prepared Pd networks had lengths ranging from hundreds of nanometers to several micrometers.…”

“…The synthesized stable copper nanostructures were demonstrated to be effective SERS substrates by employing 4-mercaptobenzoic acid as the model analyte, with its concentration ranging from 10 -3 to 10 -6 m . Feng et al reported that Pd nanowire networks prepared by a surfactant-free method in an EG/DMSO mixture were effective SERS materials as well [51] , with the detection limit for 4-mercaptopyridine being as low as 10 -8 m . Krishnadas et al prepared nickel nanowires by the reduction of nickel chloride in EG with a concentrated hydrazine hydrate solution acting as the reducing agent.…”