Journal
BIOSENSORS-BASEL
Volume 12, Issue 11, Pages -Publisher
MDPI
DOI: 10.3390/bios12110957
Keywords
chirality; surface plasmon; gold nanoparticle; plasmonic circular dichroism
Funding
- National Natural Science Foundation of China
- Strategic Priority Research Program of Chinese Academy of Sciences
- National Key Basic Research Program of China
- [22072032]
- [XDB36000000]
- [2021YFA1202800]
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This review discusses the wet-chemical synthesis and self-assembly fabrication of gold-NP-based chiral nanostructures, focusing on the growth and assembly methods of chiral nanostructures and the design and synthesis of chiral nanostructures with tunable and amplified plasmonic circular dichroism responses. In addition, the review discusses the recent trends and applications in the biomedical field.
As chiral antennas, plasmonic nanoparticles (NPs) can enhance chiral responses of chiral materials by forming hybrid structures and improving their own chirality preference as well. Chirality-dependent properties of plasmonic NPs broaden application potentials of chiral nanostructures in the biomedical field. Herein, we review the wet-chemical synthesis and self-assembly fabrication of gold-NP-based chiral nanostructures. Discrete chiral NPs are mainly obtained via the seed-mediated growth of achiral gold NPs under the guide of chiral molecules during growth. Irradiation with chiral light during growth is demonstrated to be a promising method for chirality control. Chiral assemblies are fabricated via the bottom-up assembly of achiral gold NPs using chiral linkers or guided by chiral templates, which exhibit large chiroplasmonic activities. In describing recent advances, emphasis is placed on the design and synthesis of chiral nanostructures with the tuning and amplification of plasmonic circular dichroism responses. In addition, the review discusses the most recent or even emerging trends in biomedical fields from biosensing and imaging to disease diagnosis and therapy.
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