ZnO is a wide band gap semiconductor with a high exciton binding energy which attracts considerable scientific and applied interest with respect to exploiting its optical properties [ 1 – 5 ]. For example, high thermal and chemical stability, simple tunability of the optical and electrical properties are widely applicable in optoelectronic devices [ 6 , 7 ]. Moreover, while exhibiting an excitonic emission peak in the ultraviolet (UV) region, ZnO typically shows strong visible luminescence bands which are due to numerous point defects
F. Muktepavela, J. Maniks, L. Grigorjeva, R. Zabels, P. Rodnyi and E. Gorokhova
1. Klingshirn, C. F., Meyer, B. K., Waag, A., & Hoffmann, A. (2010). Zinc oxide. From fundamental properties towards novel applications. Springer Series in Materials Science. 120. Springer, Heidelberg.
2. Ozgur, U., Alivov, Y I., Liu, C., Teke A., Reshchikov, M. A., Dogan, S.... Morkoc, H. (2005). A comprehensive review of ZnO materials and device s. J. App.Phys. 98, 04301l.
3. Zhang, Z., Du, J., Li, B., Zhang, S., Hong, M., Zhang, X. …Zhang, Y. (2017). Ultrathin strain gated field effect transistor based on In-doped ZnO nanobelts
V. Gerbreders, P. Sarajevs, I. Mihailova and E. Tamanis
1. Tang, W., and Wang, J. (2015). Mechanism for toluene detection of flower-like ZnO sensors prepared by hydrothermal approach: Charge transfer. Sensors and Actuators B, 207, 66-73.
2. Wei, A., Pan, L., and Huang, W. (2011). Recent progress in the ZnO nanostructure-based sensors. Materials Science and Engineering B, 176, 1409-1421.
3. Arya, S.K., Saha, S., Ramirez-Vick, J. E., Gupta, V., Bhansali, S., and Singh, S.P. (2012). Recent advances in ZnO nanostructures and thin films for biosensor
Leigang Miao, Biming Shi, Nawrat Stanislaw, Chaomin Mu and Kezhen Qi
materials. However, some drawbacks seem to exist in the original method, especially the use of toxic surfactants [ 6 – 8 ]. Moreover, these surfactants are difficult to be removed, and usually appropriate solvents are needed to wash them off. Thus, the morphology-controlled synthesis of the well aligned hierarchical structures via a simple, surfactant-free method is of great importance.
Zinc oxide (ZnO), as an important semiconductor material has been extensively investigated because of its great potential applications in electronics, photoelectronics, optics, sensors
M. Meddouri, L. Hammiche, O. Slimi, D. Djouadi and A. Chelouche
Metal oxides nanoparticles have received considerable importance in many technological applications. The search for new methods and processes to synthesize functional nanometric materials for specific applications in different areas, such as catalysis, paint and cosmetics is one of many laboratories priorities. The physical properties of nanomaterials are highly sought and used in pigments, plastics and lubricants. Zinc oxide (ZnO) is a semiconducting material characterized by a wide gap (3.37 eV) and a large exciton binding energy (60 meV
M. Krasovska, V. Gerbreders, E. Tamanis, S. Gerbreders and A. Bulanovs
1. Amin, M.T., Alazba, A.A., & Manzoor, U. (2014). A review of removal of pollutants from water/wastewater using different types of nanomaterials, Adv. Mater.Sci. Eng. , 1–24.DOI: http://dx.doi.org/10.1155/2014/825910 .
2. Singh, S., Barick, K.C., & Bahadur, D. (2013). Functional oxide nanomaterials and nanocomposites for the removal of heavy metals and dyes. Nanomater. Nanotechnol, 3 (20). DOI 10.5772/57237.
3. Rahman, M.M., Bahadar, K., Hadi, S., & Marwani, M. (2014). Low dimensional Ni-ZnO nanoparticles as marker of toxic lead
Munirah, Ziaul Raza Khan, Anver Aziz, Mohd. Shahid Khan and M.U. Khandaker
Recently, transparent conducting oxides received considerable interests due to their excellent physical, optical and electrical properties. Among them, ZnO is a promising candidate of II-VI group semiconducting material with direct band gap of 3.30 eV and high exciton binding energy of 60 meV at room temperature. Thin films of ZnO are biocompatible, with high chemical and thermal stability and have superb physical properties. They have been used in various applications, such as surface acoustic waves, gas sensors, diode lasers and