Study of Optical properties of Pure MgO and
MgO/ZnO nanocomposites Synthesized at Different
Temperature
*
K. Tamizh Selvi1 M. Priya2 M. Rathnakumari3 P. Suresh Kumar3
1
Department of Physics, Vel Tech High Tech Engineering College, Chennai, India
2
Department of Physics, Saveetha Engineering College, Chennai, India
3
Department of Physics, Velammal Engineering College, Chennai, India
*
Email: yadava_tamizhselvi@rediffmail.com
MgO/ZnO nanocomposite is wurtziteZnO structure
Abstract:
Metallic nanocomposites could offer distinct
with cubic MgO. The HRSEM picture shows that
advantages over polymeric composites due to the
morphology changes when the sample is calcined at
inherent high temperature stability, high strength,
different temperatures. The band gaps are found to
high modulus, wear resistance and thermal and
be 4.85eV and 3.07eV for MgO and MgO/ZnO
electrical
nanocomposites at 400°C.
conductivity
of
the
oxide
(MgO)
metal
matrix.
The high intense and
is
broad visible spectrum is observed from PL spectra
thermodynamically stable and wide band gap (7.2eV)
for MgO/ZnO nanocomposites shows the potential
material; it has application as a protective layer in
application of this material in opto-electronic devices.
plasma display panel [1], MgO is a best candidate for
Key words: MgO/ZnO nanocomposites, XRD, UV,
the barrier material in low field sensor called MTJ
PL, HRSEM and EDAX
sensors [2,3]. Zinc oxide (ZnO) is a wide bang gap
References:
Magnesium
nanoparticle
(3.37eV) semiconductor oxide and it is a promising
material
for
electronic
and
opto
1.
N.
Yasin,
HiNomuraa,
A.I.-Ektessabi.:
electronic
Characteristics of ion beam modified magnesium
applications such as field emitters, photo catalysts
oxide films, Thin Solid Films 447-448, 377-382,
[4].
(2004)
In this research we successfully synthesized
the
powder
form
of
MgO
and
2.
MgO-ZnO
KM
Lang,
DA
Hite,
Rw
Simmonds,
R.
McDermott, DP Pappas, and J.M. Martinis.:
nanocomposites through a simple reflux method with
Conducting
different annealing temperatures.
nanoscale tunnel barrier characterization. Review
Pure MgO and MgO/ZnO nanomaterial is
synthesized using magnesium acetate tetrahydrate
atomic
Force
microscopy
for
of scientific instruments, 75:2726, (2004)
3.
F.Houze, R. Meyer, O. Schneegans, and L.
and zinc acetate by reflux method. The as-synthesized
Boyer.: Imaging the local electrical properties of
powder is calcined at 400°C and 500°C for 2 hr. The
metal surfaces by atomic force microscopy and
samples are characterized using X-ray diffraction
conducting probes, Applied Physics Letters,
spectra
69:1975, (1996)
(XRD),
UV-Vis
spectra
and
photo
luminescence spectra (PL), high resolution scanning
electron microcope (HRSEM) and energy dispersive
analysis (EDAX).
The XRD showed that the
synthesized MgO nanoparticle is pure cubic and the
4.
Kim H, Gilmore CM.: Transparent conducting
aluminum -doped zinc oxide thin films for
organic light emitting devices. Appl. Phys. Lett.,
76: 259, (2000)