Structural and magnetic properties of CuO nanoneedles synthesized by hydrothermal method

• Published in: Applied surface science 2008-09, Vol.254 (22), p.7477-7481
• Main Authors: Dar, M.A., Kim, Y.S., Kim, W.B., Sohn, J.M., Shin, H.S.
• Format: Article
• Language: English
• Subjects: Clusters, nanoparticles, and nanocrystalline materials; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Copper oxide; Cross-disciplinary physics: materials science; rheology; Crystal growth; Exact sciences and technology; Field emission scanning electron microscopy; Hydrothermal method; Magnetic properties and materials; Magnetic properties of nanostructures; Materials science; Nanomaterials; Nanoscale materials and structures: fabrication and characterization; Nanoscale materials: clusters, nanoparticles, nanotubes, and nanocrystals; Other topics in nanoscale materials and structures; Physics; Single-crystal and powder diffraction; Structure of solids and liquids; crystallography; X-ray diffraction and scattering
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2008.06.004

The copper oxide (CuO) nanoneedles were synthesized by a simple hydrothermal method. Field emission scanning electron microscopy revealed the formation of high-density CuO nanoneedles with ultrathin nanotip at low temperature. The X-ray diffraction (XRD) results showed that the CuO nanoneedles have monoclinic structure with single crystalline phase. High-resolution transmission electron microscopy (HRTEM) and selected area electron diffraction results also assisted the products single crystalline nature. The magnetic properties of CuO nanoneedles were studied using a superconductor quantum interference device (SQUID) magnetometer, and revealing a ferromagnetic behavior of the CuO nanoneedles. The coercivity of CuO nanoneedles at 3 K was estimated to be 42 Oe. These CuO nanoneedles may be implicated to various applications such as drug delivery, magnetic resonance imaging and field emission devices.