Formation of ZnO Micro-Flowers Prepared via Solution Process and their Antibacterial Activity
1 Energy Materials & Surface Science Laboratory, Solar Research Center, School of Chemical Engineering, Chonbuk National University, Jeonju, 561-756, Republic of Korea
2 Department of Food Science and Technology, College of Agriculture and Life Sciences, Chonbuk National University, Jeonju, 561-756, Republic of Korea
Nanoscale Research Letters 2010, 5:1675-1681 doi:10.1007/s11671-010-9694-yPublished: 1 August 2010
This paper presents the fabrication and characterization of zinc oxide micro-flowers and their antibacterial activity. The micro-flowers of zinc oxide composed of hexagonal nanorods have been prepared via solution process using precursor zinc acetate di-hydrate and sodium hydroxide in 3 h of refluxing time at ~90°C. The antibacterial activities of grown micro-flowers were investigated against four pathogenic bacteria namely S. aureus, E. coli, S. typhimurium and K. pneumoniae by taking five different concentrations (5–45 μg/ml) of ZnO micro-flowers (ZnO-MFs). Our investigation reveals that at lowest concentration of ZnO-MFs solution inhibiting the growth of microbial strain which was found to be 5 μg/ml for all the tested pathogens. Additionally, on the basis of morphological and chemical observations, a chemical reaction mechanism of ZnO-MFs composed of hexagonal nanorods was also proposed.