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Mater Sci Nanotechnol 2018, Volume 2
CHARACTERIZATION AND SENSING PROPERTIES OF
ND-DOPED ZNO FILMS
Neha Verma
1,2
and
Sonik Bhatia
1
1
Kanya Maha Vidyalaya, India
2
IKG Punjab Technical University, India
I
n 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
NO
2
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 NO
2
gas concentration from 2-4% and thereafter increase in 5-6% volume
of NO
2
gas doesn’t lead to any enhancement in gas sensing response. NO
2
gas sensing enhanced significantly at 4% volume
of NO
2
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.
sonikbhatiaphysics@gmail.com