Preparation of Monodisperse Platinum Nanocrystal Core−Poly(amidoamine) (PAMAM) Dendrimer Shell Structures as Monolayer Films

Autor:	Li-Ping You, Yan Ji, Xinru Jia, Yufei Luo, Ling Yang, Qi-Feng Zhou, Yen Wei
Rok vydání:	2003
Předmět:	Materials science Dispersity chemistry.chemical_element Nanoparticle Nanotechnology Poly(amidoamine) Surfaces Coatings and Films chemistry Chemical engineering Nanocrystal Transmission electron microscopy Dendrimer Monolayer Materials Chemistry Physical and Theoretical Chemistry Platinum
Zdroj:	The Journal of Physical Chemistry B. 108:1176-1178
ISSN:	1520-5207 1520-6106
Popis:	Hybrid nanoparticles of carboxyl-terminated generation 4.5 (G4.5) poly(amidoamine) dendrimers with platinum nanocrystals encapsulated inside them were prepared in water. The obtained nanoparticles were treated by size-selective precipitation to refine the size distribution. On a carbon-coated copper grid, the nanoparticles formed a monolayer film when observed by TEM. The sizes of the hybrid nanoparticles were evenly dispersed, with an average diameter of 4.0 nm. The Fourier transform power spectrum proved that the monolayer film had short-range order, and locally hexagonal packing was present. High-resolution transmission electron microscopy showed that the encapsulated Pt atoms were gradually rearranged as metal nanocrystals after a period of time.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b12d54816ce96c8aab06e10a5261a288 https://doi.org/10.1021/jp0360220 Zobrazit plný text záznamu