Synthesis and Properties of Monometallic and Bimetallic Silver and Gold Nanoparticles

Synthesis and Optical Properties of Hybrid and Alloy Plasmonic Nanoparticles

“…The theoretical basis for studies into their optical properties was laid by Aden and Kerker in 1951, and the issue here is how the two different plasmon resonance frequencies of Ag and Au might interact in the hybrid particle. Au@Ag or Ag@Au core−shell particles have been prepared by a variety of methods including electrolysis, radiolysis, ,− physical deposition, or photochemical reduction, , but sequential chemical reduction in aqueous or organic solutions is also very popular ,,− (see also references provided by Ferrando et al). As a general observation, the plasmon resonance of the core nanosphere is rapidly masked or attenuated by that of the growing shell, and after passing through a regime in which two plasmon resonances are present, the shell resonance dominates.…”

Recent Advances in the Synthesis and Main Applications of Metallic Nanoalloys

“…It is important to note the quick growth of this research area, which is shown by the great number of related publications, and its promising and attractive application field, especially paying attention to the great importance of catalytic applications of nanoalloys. Intrinsic physical and chemical properties of metal nanoparticles − confer them unique properties to be explored. As a result, a variety of applications have reported including the creation of nanocatalysts for efficient selective catalysis, sensors, and filters, among many other applications (fabrication of optics, electronics and magnetic materials).…”

Investigating the Performance of Near‐Infrared Light Responsive Monometallic Gold and Bimetallic Gold‐Palladium Nanorattles towards Plasmonic Photothermal Therapy

“…Before proceeding for PPTT applications, we determined the in vitro biocompatibility of the PEGylated nanorattles both in normal cell line HEK-293 A and a breast cancer cell line SK-BR-3. Both the cells were incubated with different concentrations (10,25,50 and 100 μg/mL) of Au NRTs and AuÀ Pd NRTs in a 96 well culture plates for 24 h in an incubator at 5 % CO 2 and 37°C following which the viability of the cells was evaluated using XTT based cell viability assay (details men- ChemistrySelect tioned in experimental section). Figure 6 (a) and (b) represents the cytocompatibility of Au NRTs and AuÀ Pd NRTs in SK-BR-3 cell line and HEK-293 A cell lines, respectively.…”

“…The in vitro photothermal therapeutic potential of the PEGylated nanorattles was next evaluated in the breast cancer SK-BR-3 cell line. For this, the cells were treated with different concentrations of nanorattles (10,25,50 and 100 μg/mL) in 96 well culture plates. After 24 h of treatment, the nanorattles containing media were removed from the wells and the cells were washed with PBS.…”

“…Gold nanostructures have been the protagonist in most PPTT applications due to its ease in synthesis and shape and structure dependent extinction spectra which can be tuned from visible to NIR region [2a,6] . However, palladium, platinum, copper, and iron oxide nanomaterials are also gaining ground due to the varied features and advantages they possess over gold [1b,7–8] For example, palladium is attracting attention as phototransducers due to its excellent photostability, biocompatibility and photothermal conversion efficiencies [1a,7a,8b,9] Furthermore, bimetallic nanoparticles are also being explored for PPTT where the combination of metals results in the enhancement or suppression of certain physical as well as chemical properties which is greatly desired while producing photothermal agents [8b,10] . Though various gold nanostructures have been demonstrated for PPPT applications, after the report on NIR active palladium nanosheet, there has been a search for other metal nanostructures with better photothermal conversion efficiency for PPTT applications [11] .…”