2011
DOI: 10.1021/jp1086027
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Surface-Enhanced Raman Scattering from Copper Nanoparticles Obtained by Laser Ablation

Abstract: Copper colloidal nanoparticles are obtained by laser ablation in aqueous solutions of ligands by nanosecond laser pulses at 532 and 1064 nm and examined by localized surface plasmon resonance (LSPR) and surface-enhanced Raman scattering (SERS) spectroscopy, along with transmission electron microscopy (TEM) and zeta potential measurements. This fabrication method, besides providing SERSactive substrates without spectral interferences of reagents, as it generally occurs for the chemical reduction of metal ions, … Show more

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Cited by 168 publications
(98 citation statements)
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“…Target parameters are the type of the bulk target, type of the liquid and temperature of the system. Variety of nanomaterials can be obtained by laser ablation such as metals [23], metal oxides [24], noble metals [25], semiconductors [26].…”
Section: Nanoparticle Synthesis By Laser Ablation In Liquidsmentioning
confidence: 99%
“…Target parameters are the type of the bulk target, type of the liquid and temperature of the system. Variety of nanomaterials can be obtained by laser ablation such as metals [23], metal oxides [24], noble metals [25], semiconductors [26].…”
Section: Nanoparticle Synthesis By Laser Ablation In Liquidsmentioning
confidence: 99%
“…However, unlike, for example, the laser-based formation of gold [23] and platinum [24] nanoparticles, the susceptibility of CuNPs to surface oxidation both during and following their formation has made studies of CuNP chemistry more challenging. [28][29][30] Muniz-Miranda et al [31] have demonstrated that CuNPs prepared via laser ablation in acetone do not form a surface oxide layer and are quite stable in solution, whereas those produced in pure water do have a surface oxide layer but are relatively short-lived. These authors attribute the lack of stability of these particles to 'rapid aging through oxidation' and fast coagulation.…”
Section: Introductionmentioning
confidence: 99%
“…The authors go on to recommend, 'In general, it is advisable to perform the ablation in solutions containing proper particle stabilizers'. [31] CuNPs formed in the presence of aqueous solutions of 1,10-phenanthroline (phen) or 4,4 0 -bipyridine (bipy) have a surface oxide covering and are also quite stable in solution. A key probe for the presence or absence of a CuNP surface oxide layer is to monitor the surface plasmon resonance (SPR) electronic transition.…”
Section: Introductionmentioning
confidence: 99%
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“…SERS allows obtain spectra of substances at very low concentration [19,20]. Two theories explain this technique: The electromagnetic theory: the increase in intensity of the Raman signal for adsorbates on particular surfaces occurs because of an enhancement in the electric field provided by the surface and the chemical theory explains the effect through the formation of charge-transfer complexes [21].…”
Section: Introductionmentioning
confidence: 99%