+44-1518-081136CHARACTERIZATION AND SENSING PROPERTIES OF ND-DOPED ZNO FILMS
Joint Event on International Conference on ADVANCED MATERIALS AND POLYMER SCIENCE & International Conference and Expo on SEPARATION TECHNIQUES
October 19-20, 2018 | Tokyo, Japan
Neha Verma and Sonik Bhatia
Kanya Maha Vidyalaya, India IKG Punjab Technical University, India
Posters & Accepted Abstracts : Mater Sci Nanotechnol
Abstract:
In the present study, we have reported novel, sensing, morphology and optical properties of Neodymium (Nd) doped ZnO nanoparticles using simple combustion method. Herein, different concentrations of Nd (2.0%, 2.5%, 3.0%, 3.5%) were used as dopants. These rod-shaped ZnO nanoparticles were analyzed for x-ray diffraction, FESEM, UV vis spectroscopy, photoluminescence. Characterization studies reveal that the prepared nanoparticles are well crystalline with hexagonal wurtzite structure and are having good optical properties. FESEM images reveals thread type surface morphology of order of 65-90 nm. Optical band gap is obtained from UV vis spectrophotometer and it lies in the range of 3.22-3.31 eV. To develop smart nanoscale devices, ZnO was coated on glass substrate by dip coating technique and were characterized for gas sensing property towards NO2 gas. These unique nanoparticles also played an important role in detecting host gas due to its contribution in facilitating the transport change and augmenting the adsorption quality of target gas molecules. Interestingly, the sensitivity of the prepared films was found to improve with increase in volume of NO2 gas concentration from 2-4% and thereafter increase in 5-6% volume of NO2 gas doesnât lead to any enhancement in gas sensing response. NO2 gas sensing enhanced significantly at 4% volume of NO2 gas sensor with response 90.16%. Thus, the optimum concentrations of prepared film (3.0%) are exhibiting maximum response. The prepared films are found to have quick response time 58 sec while the recovery time was 76 sec respectively.
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