Effect of polyacrylamide on morphology and electromagnetic properties of chrysanthemum-like ZnO particles

doi:10.1088/1674-1056/18/10/076

Abstract

Abstract Through hydrothermal process, the chrysanthemum-like ZnO particles are prepared with zinc acetate dihydrate (Zn(CH₃COO)₂

\cdot

2H₂O) and sodium hydroxide (NaOH) used as main resources under the different concentrations of surfactant polyacrylamide (PAM). The microstructure, morphology and the electromagnetic properties of the as-prepared products are characterized by high-resolution transmission electron microscopy (HRTEM), field emission environment scanning electron microscope (FEESEM) and microwave vector network analyzer, respectively. The experimental results indicate that the as-prepared products are ZnO single crystalline with hexagona wurtzite structure, that the values of slenderness ratio

L_{d}

are different in different PAM concentrations, and that the good magnetic loss property is found in the ZnO products, and the average magnetic loss tangent tan

δ_{u}

increases with PAM concentration increasing, while the dielectric loss tangent tan

δ_{e}

decreases.

Keywords: chrysanthemum-like ZnO particles electromagnetic properties hydrothermal method PAM

Received: 03 April 2009
Revised: 26 April 2009
Accepted manuscript online:

PACS:	61.46.Df	(Structure of nanocrystals and nanoparticles ("colloidal" quantum dots but not gate-isolated embedded quantum dots))
	75.50.Tt	(Fine-particle systems; nanocrystalline materials)
	77.22.Ch	(Permittivity (dielectric function))
	77.22.Gm	(Dielectric loss and relaxation)
	81.07.Bc	(Nanocrystalline materials)
	81.16.-c	(Methods of micro- and nanofabrication and processing)

Fund: Project supported by the National High Technology Research and Development Program of China (Grant No 2005A000200), the Xi'an Applied Materials Innovation Fund, China (Grant No XA-AM-200712), and the Innovative Experiment Program for Chinese Students (Gra

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Yan Jun-Feng(闫军锋), Zhang Zhi-Yong(张志勇), You Tian-Gui(游天桂), Zhao Wu(赵武), Yun Jiang-Ni(贠江妮), and Zhang Fu-Chun(张富春) Effect of polyacrylamide on morphology and electromagnetic properties of chrysanthemum-like ZnO particles 2009 Chin. Phys. B 18 4552

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