title: Seed-mediated growth of jack-shaped gold nanoparticles from cyclodextrin-coated gold nanospheres.
abstract: Branched gold nanoparticles were prepared by a seed-mediated approach using per-6-thio-6-deoxy-β-cyclodextrin capped gold nanospheres as seeds and a growth medium similar to those commonly employed to prepare gold nanorods, containing AgNO3, ascorbic acid and cetyltrimethylammonium bromide. Novel jack-shaped gold nanoparticles (102-105 nm) were obtained at a specific range of Ag(+) ion concentrations (62-102 μM). The crystalline structure of these nanoparticles was confirmed by high-resolution transmission electron microscopy. The influence of the perthiolated β-cyclodextrin on the successful preparation of gold nanojacks was demonstrated. The jack-shaped gold nanoparticles showed strong absorption in the near infrared region and excellent catalytic activity for the electrochemical oxidation of H2O2.
authors: Department of Analytical Chemistry, Faculty of Chemistry, Complutense University of Madrid, 28040-Madrid, Spain. pingarro@quim.ucm.es rvillalonga@quim.ucm.es.
authors: Alfredo
authors: A
authors: Sánchez
authors: Paula
authors: P
authors: Díez
authors: Reynaldo
authors: R
authors: Villalonga
authors: Paloma
authors: P
authors: Martínez-Ruiz
authors: Marcos
authors: M
authors: Eguílaz
authors: Iñigo
authors: I
authors: Fernández
authors: José M
authors: JM
authors: Pingarrón