Near Infrared Tunable Gold Nanoparticles for Low Power Laser Ablation of Esophageal Adenocarcinoma

Autor:	Andre M. Gobin, Dhruvinkumar Patel, Kurtis T. James, Jacek B. Jasinski, Xinghua Sun, Guandong Zhang
Rok vydání:	2012
Předmět:	Ostwald ripening Materials science Laser ablation Nanostructure Colloid chemistry.chemical_compound symbols.namesake chemistry Colloidal gold Chloroauric acid symbols Particle size Absorption (chemistry) Nuclear chemistry
Zdroj:	MRS Proceedings. 1416
ISSN:	1946-4274 0272-9172
DOI:	10.1557/opl.2012.666
Popis:	Gold nanoparticles (GNPs) with precisely controlled near infrared (NIR) absorption were synthesized by one-step reaction of chloroauric acid and sodium thiosulfate. The NIR absorption wavelengths and average particle size increase with increasing molar ratio of HAuCl4/Na2S2O3. The as-synthesized GNPs consist of different shape and size, including small spherical gold colloids and larger non-spherical gold crystals. The GNPs with good chemical and optical stability only form in a suitable range of the HAuCl4/Na2S2O3 molar ratio. High molar ratio of HAuCl4/Na2S2O3 reduces GNPs stability due to Ostwald ripening. Chitosan coating improves particle stability and allows these GNPs effective ablation for esophageal adenocarcinoma under low power NIR laser radiation.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::33cccb85e325838d1c71b2f3bcd8d77b https://doi.org/10.1557/opl.2012.666 Zobrazit plný text záznamu Full text from SpringerLink