Nanoparticles, nanowires and nanobelts of zinc oxide | |
| Author | Hossain, Mohammad Kamal |
| Call Number | AIT Thesis no.ME-03-03 |
| Subject(s) | Nanoparticles Nanowires Zinc oxide |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Advanced Technologies |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. ME-03-03 |
| Abstract | Nanometer-sized semiconductor particles belong to a state of matter in the transition region between molecules and solids. Their size-dependent physical and chemical properties are cunently under investigation in various fields of science. Zinc oxide (ZnO) is receiving renewed attention for wide band-gap device applications due to a number of advantages it presents in comparison with GaN, e.g., larger exciton binding energy (60 meV), availability of large area substrates for homoepitaxy, etc. The synthesis of zinc oxide (ZnO) monodispersed colloids have been carried out using a variety of different techniques, but sol-gel is the unique amongst all techniques due to its additional advantages over nucleation and formation of colloidal pa1ticles. In this study, zinc oxide nanoparticles, nanowires and nanobelts were synthesized from a sol-gel route which is relatively straightforward, inexpensive and easy to handle. The colloidal nanoparticles obtained are highly monodispersed with primary particle sizes measuring around 30 nm in diameter. These nanoparticles were further processed to get nanometric wires and belts (~700 J.lm) under controlled conditions. The phase structure of the produced zinc oxide (ZnO) nanoparticles and nanowires were identified by X-ray diffractometer (XRD). XRD measurement reveals that zinc oxide (ZnO) nanoparticles and nanowires have hexagonal wurtzite crystal structure having planes {100}, {002} and {101} at diffraction angle 28= 31.9°, 34.64° and 36.42° respectively with the cell constant a = 3.2427 A and c = 5.1948 A. The crystallite size was calculated to be around 10 nm by using Debye-Schener formula. The presence of oxide group in powder form of zinc oxide (ZnO) was confitmed by Fourier Transform InfraRed (FTIR) spectroscopy. Also a series of typical Scanning Electron Microscopy (SEM) morphologies of the nanoparticles, nanowires and nanobelts were performed. It needs to be mentioned here that the synthesis route is highly reproducible. |
| Year | 2003 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. ME-03-03 |
| Type | Thesis |
| School | School of Advanced Technologies (SAT) |
| Department | Department of Industrial Systems Engineering (DISE) |
| Academic Program/FoS | Microelectronics (ME) |
| Chairperson(s) | Dutta, Joydeep; |
| Examination Committee(s) | Chanchana Thanachayanont;Rakshit, Sudip Kumar;Dhar, Sumi N. ; |
| Scholarship Donor(s) | Japanese Government Scholar; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2003 |