Plasmonically Modulated Gold Nanostructures for Photothermal Ablation of Bacteria

Abstract

With the wide utilization of antibiotics, antibiotic‐resistant bacteria have been often developed more frequently to cause potential global catastrophic consequences. Emerging photothermal ablation has been attracting extensive research interest for quick/effective eradication of pathogenic bacteria from contaminated surroundings and infected body. In this field, anisotropic gold nanostructures with tunable size/morphologies have been demonstrated to exhibit their outstanding photothermal performance through strong plasmonic absorption of near‐infrared (NIR) light, efficient light to heat conversion, and easy surface modification for targeting bacteria. To this end, this review first introduces thermal treatment of infectious diseases followed by photothermal therapy via heat generation on NIR‐absorbing gold nanostructures. Then, the usual synthesis and spectral features of diversified gold nanostructures and composites are systematically overviewed with the emphasis on the importance of size, shape, and composition to achieve strong plasmonic absorption in NIR region. Further, the innovated photothermal applications of gold nanostructures are comprehensively demonstrated to combat against bacterial infections, and some constructive suggestions are also discussed to improve photothermal technologies for practical applications.

A Review on Hydrogels with Photothermal Effect in Wound Healing and Bone Tissue Engineering

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Structural control and biomedical applications of plasmonic hollow gold nanospheres: A mini review

“…A number of biologically relevant linkers can be conjugated to the surface of gold nanoparticles including antibodies (S. Lee et al, 2009), peptides (J. H. Lee et al, 2017), and oligonucleotides (Luo et al, 2019) allowing particles to bind in close proximity to diseased tissue (Luo et al, 2019; You et al, 2014). Additionally, gold nanoparticles exhibit strong photothermal effects by efficiently converting light into heat through electron–phonon coupling (Guan et al, 2020). They can also enhance local electromagnetic fields that are important for applications such as surface enhanced Raman scattering (SERS) (Ren et al, 2013).…”

Completely green synthesis of rose-shaped Au nanostructures and their catalytic applications

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