Siam Physics Congress 2018

Synthesis and room-temperature ferromagnetism in flower-like SnO2 nanostructures

21 May 2018, 17:45

1h

Ayutthaya Room

Poster Nanoscale Physics and Nanotechnology A05: Nanoscale and Surface (Poster)

Speaker

Dr Kwanruthai Wongsaprom (Mahasarakham)

Description

Abstract. The flower-like nanostructures of SnO${}_2$ were successfully synthesized by a simple hydrothermal method. The structure of the flower-like samples was investigated by X-ray diffraction (XRD). The samples revealed the single phase of SnO${}_2$ tetragonal structure. The corresponding selected-area electron diffraction (SAED) analysis further confirmed the formation of the tetragonal structure of SnO${}_2$ without secondary phases. The UV-visible spectroscopy showed the absorption peaks of SnO${}_2$ flower-like samples in ultraviolet region centered at approximately 275 nm (4.37 eV). The estimated band gap of the samples was in the range of 3.47-3.52 eV. The magnetic properties were investigated by VSM. The flower-like sample prepared at 180${}^o$C for 48 h exhibits a diamagnetic behavior, whereas the sample prepared at 180${}^o$C for 24 h is ferromagnetic having the saturation magnetization of 0.574 memu/g at 15 kOe.

Peer reviewing

Paper

Accepted on 4 Sept 2018 by spc2018 narasuan

SnO2_flower-like_nanostructures-kwanruthai-revised_ref507.pdf