Deposition of the Monodispersed Pt Nanodots on a Substrate by Using the Pt Nanoparticle-Containing Dendrimer Micelle Aqueous Solution

• Published in: Journal of inorganic and organometallic polymers and materials Vol. 24; no. 1; pp. 214 - 218
• Main Authors: Hirano, Isao, Imaoka, Takane, Yamamoto, Kimihisa
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.01.2014
• Subjects: Agglomeration; Chemistry; Chemistry and Materials Science; Dendrimers; Deposition; Inorganic Chemistry; Micelles; Nanoparticles; Nanostructure; Organic Chemistry; Particulate composites; Platinum; Polymer Sciences; Platinum Nanoparticles; Dendritic polyphenylazomethine; Dendrimers; Metal–polymer complexes; Micelles
• ISSN: 1574-1443; 1574-1451
• DOI: 10.1007/s10904-013-9879-9

Dendritic polyphenylazomethine (DPA) can form complexes with an unambiguous number of various metal ions, allowing the preparation of size-controlled sub-nanometer metal particles. Upon the deposition of the obtained metal nanoparticles on a substrate, the diameters usually tend to grow larger due to the aggregations. We now report that the deposition of such platinum (Pt) particles obtained by one of the DPA dendrimers (DPAG4) on a substrate without such aggregations. First, Pt nanoparticles supported in DPAG4 (DPAG4–Pt) were prepared from the complex between DPAG4 and 14PtCl 4 (DPAG4–14PtCl 4 ) in an organic solvent by a hydride reduction. The micelles of the dendrimer-surfactant composite containing monodispersed Pt nanoparticles in the shell are prepared in metal free buffer solutions. Because of the electro charge repulsion among the DPAG4 micelles, the monodispersed Pt particles prepared by DPAG4 can be deposited on the substrate without aggregation.