Results
Title

Hydrothermal synthesis of MnO nanowires: structural characterizations, optical and magnetic properties.

Authors

Toufiq, Arbab; Wang, Fengping; Javed, Qurat-ul-ain; Li, Quanshui; Li, Yan

Abstract

In this paper, 1D single-crystalline MnO nanowires have been successfully synthesized by hydrothermal method using KMnO and (NH)SO as raw materials. X-ray diffraction patterns and high-resolution TEM images reveal pure tetragonal MnO phase with diameters of 15-20 nm. Photoluminescence studies exhibited a strong ultraviolet (UV) emission band at 380 nm, blue emission at 452 nm and an extra weak defect-related green emission at 542 nm. UV-visible spectrophotometery was used to determine the absorption behavior of nanostructured MnO and a direct optical band gap of 2.5 eV was acquired by Davis-Mott model. The magnetic properties of the products have been evaluated using vibrating sample magnetometer, which showed that MnO nanowires exhibited a superparamagnetic behavior at room temperature. The magnetization versus temperature curve of the as-obtained MnO nanowires shows that antiferromagnetic transition temperature is 99 K.

Subjects

SYNTHESIS of nanowires; MANGANESE oxides; THERMAL analysis; CRYSTAL structure; OPTICAL properties of metals; MAGNETIC properties of metals; MAGNETIZATION

Publication

Applied Physics A: Materials Science & Processing, 2014, Vol 116, Issue 3, p1127

ISSN

0947-8396

Publication type

Academic Journal

DOI

10.1007/s00339-013-8195-0