Room-temperature growth of uniform tellurium nanorods and the assembly of tellurium or magnetite nanoparticles on the nanorods

COLL 464

Jiayin Yuan, jiayin.yuan@uni-bayreuth.de1, Holger Schmalz, holger.schmalz@uni-bayreuth.de1, Youyong Xu, youyong.xu@uni-bayreuth.de1, Nobuyoshi Miyajima2, Markus Drechsler, markus.drechsler@uni-bayreuth.de1, Michael W. Moeller, michael.moeller@uni-bayreuth.de3, Eva Max, eva.max@uni-bayreuth.de4, and Axel H. E. Müller, axel.mueller@uni-bayreuth.de1. (1) Macromolecular Chemistry II, University of Bayreuth, NW II, Bayreuth, D-95440, Germany, (2) Bayerisches Geoinstitut, University of Bayreuth, 95440 Bayreuth, Germany, (3) Inorganic Chemistry I, University of Bayreuth, NW I, Bayreuth, D-95440, Germany, (4) Department of Physical Chemistry II, University of Bayreuth, NW I, Universitaetsstrasse 30, Bayreuth, D-95440, Germany
Single-crystalline Te nanorods with up to 820 nm length and 36 ± 8 nm diameter (aspect ratio from 2.7 to 22) were prepared at room temperature in solution by a cylindrical polymer brush (CPB)-assisted method. Te or Fe3O4 nanoparticles were assembled on the Te nanorods. The macromolecular CPB used in this research work has a backbone of poly(2-hydroxyethyl methacrylate) (DP = 3,200) and poly(tert-butyl methacrylate) (PtBMA) side chains (DP = 90). Uniform Te nanorods were achieved by simply introducing H2Te gas into the solution of CPB in organic solvent. Our primary results demonstrate that the CPBxs not only act as the capping agents for the formation of Te nanorods, but also react with H2Te to become chemically attached to the nanorod, which assembles Te or Fe3O4 nanoparticles onto the nanorods. The magnetite-decorated rods are superparamagnetic and may find use in magnetoviscous devices.
 

Polymer-Nanoparticle Systems: Theory, Simulation, Experiments
9:00 AM-11:40 AM, Thursday, April 10, 2008 Morial Convention Center -- Rm. 227, Oral

Division of Colloid & Surface Chemistry

The 235th ACS National Meeting, New Orleans, LA, April 6-10, 2008