Synthetic Methodologies to Gold Nanoshells: An Overview

Abstract

Gold nanostructures that can be synthetically articulated to adapt diverse morphologies, offer a versatile platform and tunable properties for applications in a variety of areas, including biomedicine and diagnostics. Among several conformational architectures, gold nanoshells provide a highly advantageous combination of properties that can be fine-tuned in designing single or multi-purpose nanomaterials, especially for applications in biology. One of the important parameters for evaluating the efficacy of gold nano-architectures is their reproducible synthesis and surface functionalization with desired moieties. A variety of methods now exist that allow fabrication and chemical manipulation of their structure and resulting properties. This review article provides an overview and a discussion of synthetic methodologies to a diverse range of gold nanoshells, and a brief summary of surface functionalization and characterization methods employed to evaluate their overall composition.

Single-step assembly of gold nanoparticles into plasmonic colloidosomes at the interface of oleic acid nanodroplets

“…This difference arises from the coupling of the individual NP plasmons due to the decrease of the interparticle distances. In addition, as it has been reported [19][20][21] for Au nanoshells, the hollow nature of these nanostructures is another key parameter for red-shi of the plasmonic absorption compared to the isolated Au NPs. The effect of this plasmonic coupling consists of more or less pronounced wavelength absorption red-shi and band broadening that depends on the size, the shape, the interparticle distance and the hollow cavity size of the obtained nanostructures.…”

Antibacterial Properties of Functionalized Gold Nanoparticles and Their Application in Oral Biology

“…Gold nanoparticles (CC-AuNPs) show high antibacterial activity against three bacterial strains including Salmonella typhimurium, Bacillus cereus, and Staphylococcus aureus [18]. Gold nanoshells also have interesting physical properties, including optical and surface plasmon resonance, which can be customized during the synthesis process, giving gold nanoshells significant potential in nanomedicine [19].…”

Electromagnetically Stimuli-Responsive Nanoparticles-Based Systems for Biomedical Applications: Recent Advances and Future Perspectives

“…To obtain the LSPR in the NIR region, nanoshells are often produced with a core of SiO 2 and the outer layer of Au. Modifying the thickness of the outer layer, it is possible to vary the resonance frequency [ 109 ]. In Figure 9 , a difference of the heat generated for various sizes of Ag-NPs under a 532 nm wavelength radiation through photothermal lens spectroscopy is shown [ 103 ].…”