Effect of the number of cycles on the optical and structural properties of Mn3O4 nanostructures obtained by SILAR technique

• Published in: Journal of materials science. Materials in electronics 2018-06, Vol.29 (12), p.10542-10549
• Main Authors: Bayram, Ozkan, Simsek, Onder, Guney, Harun, Igman, Erdal, Murat Ozer, Mustafa
• Format: Article
• Language: English
• Subjects: Ammonium hydroxide; Band gap; Characterization and Evaluation of Materials; Chemistry and Materials Science; Contact angle; Crystal structure; Glass substrates; Manganese compounds; Manganese oxides; Materials Science; Nanostructure; Nitrates; Optical and Electronic Materials; Optical properties; Scanning electron microscopy; Soda-lime glass; Spectrum analysis; Thin films; X-ray diffraction
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-018-9118-9

In this study, nanostructured Mn 3 O 4 (manganese oxide) thin films were successfully obtained by successive ionic layer adsorption and reaction (SILAR) method on the soda lime glass substrates using Manganese Nitrate (Mn(NO 3 ) 2 ) and Ammonium hydroxide (NH 4 (OH)) as cationic and anionic precursors respectively. Structural and morphological characterizations of the Mn 3 O 4 films obtained at different cycles were determined using X-ray diffraction (XRD) and Scanning Electron Microscopy (SEM). The crystal structure of the thin films were also confirmed by RAMAN spectroscopy. Optical properties such as absorption, transmission, reflection, extinction coefficient and optical band gap of nanostructured Mn 3 O 4 thin films were determined by UV–Vis spectroscopy. SEM images showed that the manganese oxide nanosheets formed uniformly on substrate surface. As the deposition cycles increased, nano-sheets structure deteriorated. The optical band gap of Mn 3 O 4 thin films varied from 2.12 to 2.59 eV, depending on the increase in number of cycles. From contact angle measurements of thin films, it was determined that thin films had hydrophilic character.