We report synthesis of some binary and ternary metal oxide nanostructures using microwave irradiation-assisted chemical synthesis, either in the presence or absence of a surfactant/structure directing agent. The method is simple, inexpensive, and yields nanoparticles of desired metal oxides in minutes, and requires no conventional templating. Nanoparticles of some functionally advanced binary/ternary metal oxides (MnO2, ZnO, CuO, ZnMn2O 4 etc) have been synthesized using metal acetylacetonates as the starting precursor material and microwave as the source of energy, in a process developed in detail in our laboratory. The nanoparticle size varies from 7-50 nm. Emphasis has been placed on the synthesis of ZnO nanostructures, particularly ZnO nanoshells, which do not require any surfactant/structure- directing agent for synthesis. There is a systematic variation in the morphology of the ZnO nanostructures with variation of process parameters, such as microwave power, microwave irradiation time, type of solvents, surfactants/structure-directing agents and its type and concentration. The as-prepared powder sample may either need a very brief exposure to heat to remove the surfactant or no post-synthesis processing, and is found to be well-crystallised. Determination of their crystallinity, actual shape, and orientation was made using X-ray diffraction, scanning electron microscopy (SEM) and transmission electron microscopy (TEM).
|Original language||English (US)|
|Title of host publication||Oxide Nanoelectronics|
|Number of pages||6|
|State||Published - 2011|
|Event||2010 MRS Fall Meeting - Boston, MA, United States|
Duration: Nov 29 2010 → Dec 3 2010
|Name||Materials Research Society Symposium Proceedings|
|Other||2010 MRS Fall Meeting|
|Period||11/29/10 → 12/3/10|
Bibliographical noteFunding Information:
The authors acknowledge the Institute of Nanoscience Initiative (INI), a National Facility for Electron Microscopy, for support in the SEM and TEM analysis reported in this study. SB thanks the Department of Science and Technology, Govt. of India, for financial support to attend MRS 2010 Fall Meeting, and the Council of Scientific and Industrial Research (CSIR) for award of a research associateship.