Facile Photochemical Synthesis of Luminescent Gold Nanoparticles
Chinese scientists have recently developed a facile photochemical route for the preparation of gold nanoparticles with excellent luminescence properties.
Importance of Gold Nanoparticles in Biomedical Applications
Gold nanoparticles (AuNPs) are noble metal nanomaterials with unique physicochemical properties, easy functional modification, and superior biocompatibility. They have been widely utilized in bio-sensing, bio-imaging, disease diagnosis, and cancer treatment.
Challenges in Synthesizing Luminescent Gold Nanoparticles
Luminescent gold nanoparticles (L-AuNPs) larger than 2 nm have excellent performance and are valuable in biomedical imaging. However, traditional synthesis methods, such as thermal reduction, are complex and labor-intensive, limiting their applications.
Novel Facile Photochemical Method Developed
The Chinese scientists, led by Professor Jiang Yuqiang, introduced a facile photochemical method for synthesizing highly luminescent AuNPs coated with 2-n-hexylthio-1,3,4-thiadiazole-5-thiol (L-AuNP@HTT).
Key Findings of the Study
The prepared L-AuNP@HTT exhibited excellent photoluminescence properties, including high quantum yield, ultra-long luminescence lifetime, symmetric PL curve profiles, and narrow full width at half maximum.
Enhanced Luminescent Properties and Biomedical Applications
The study also highlighted that after further polymer encapsulation treatment, the two-photon absorption cross section per particle can be significantly increased, making them superior to conventional fluorescent dyes.
Applications and Collaborative Efforts
The scientists achieved high-quality mitochondria-targeted two-photon excited luminescence imaging, time-gated delayed imaging of deep tissues, and in vivo computed tomography imaging with the polymer-encapsulated gold nanoparticles.
Future Implications
This research paves the way for the facile synthesis of high-performance luminescent gold nanoparticles for a wide range of bio-imaging applications.
More information: Lulu Yang et al, Highly luminescent gold nanoparticles prepared via a facile photochemical method for bioimaging applications, Advanced Composites and Hybrid Materials (2024). DOI: 10.1007/s42114-024-00964-w
