title: Size-selective synthesis of immobilized copper oxide nanoclusters on silica.
abstract: We report a straightforward route for preparing bulk quantities of size-controlled and low size dispersity copper oxide nanoclusters on amorphous silica. Adsorption of the copper-dendrimer complex on the silica surface minimizes aggregation, which results in previously unachieved low size dispersity of the nanoclusters. Copper oxide nanoclusters with mean diameters of 1-5 nm with size dispersities of only 8-15% were prepared by calcination of silica impregnated with Cu(II)-poly(propylene imine) dendrimer complexes of varying stoichiometry. The size and size distribution of the copper oxide nanoparticles are tunably controlled by the ratio of the Cu(II) to the terminal primary amines in the copper-dendrimer complex, DAB-Amn-Cu(II)x, the surface coverage of the DAB-Amn-Cu(II)x, and the impregnation procedure. This method is anticipated to be useful in the preparation of other metal oxide nanoparticles, e.g., Ni and Fe, and with other oxide substrates.
authors: Louisiana State University, Department of Chemistry, 232 Choppin Hall, Baton Rouge, LA 70803-1804, United States.
authors: Slawo M
authors: SM
authors: Lomnicki
authors: Louisiana State University, Department of Chemistry, 232 Choppin Hall, Baton Rouge, LA 70803-1804, United States.
authors: Hongyi
authors: H
authors: Wu
authors: Louisiana State University, Department of Chemistry, 232 Choppin Hall, Baton Rouge, LA 70803-1804, United States.
authors: Scott N
authors: SN
authors: Osborne
authors: Louisiana State University, Department of Chemistry, 232 Choppin Hall, Baton Rouge, LA 70803-1804, United States.
authors: Jeff M
authors: JM
authors: Pruett
authors: Louisiana State University, Department of Chemistry, 232 Choppin Hall, Baton Rouge, LA 70803-1804, United States.
authors: Robin L
authors: RL
authors: McCarley
authors: Louisiana State University, Department of Chemistry, 232 Choppin Hall, Baton Rouge, LA 70803-1804, United States.
authors: Erwin
authors: E
authors: Poliakoff
authors: Louisiana State University, Department of Chemistry, 232 Choppin Hall, Baton Rouge, LA 70803-1804, United States.
authors: Barry
authors: B
authors: Dellinger
keywords: Copper oxide nanoclusters; Dendrimer; Nanocluster size control
references: J Am Chem Soc. 2004 Sep 8;126(35):10864-6
references: 15339170
references: Nat Nanotechnol. 2008 Feb;3(2):106-11
references: 18654471
references: J Colloid Interface Sci. 2008 Jan 15;317(2):351-74
references: 18028940
references: J Colloid Interface Sci. 2007 Apr 1;308(1):105-11
references: 17250848
references: J Air Waste Manag Assoc. 2005 Jun;55(6):708-46
references: 16022411
references: Acc Chem Res. 2001 Mar;34(3):181-90
references: 11263876
references: Ecotoxicology. 2008 Jul;17(5):326-43
references: 18459043
references: Eur Phys J E Soft Matter. 2008 Oct;27(2):205-11
references: 18855030
references: J Am Chem Soc. 2006 Feb 8;128(5):1675-82
references: 16448141
references: J Am Chem Soc. 2001 Oct 31;123(43):10545-53
references: 11673986
references: Chem Rev. 2004 Sep;104(9):3893-946
references: 15352782
references: J Synchrotron Radiat. 1998 Mar 1;5(Pt 2):118-22
references: 16687813