TY - JOUR
T1 - Effect of irradiation by 140 Mev Ag11+ ions on the optical and electrical properties of polypropylene/TiO2 composite
AU - Qureshi, Anjum
AU - Singh, Dolly
AU - Singh, N. L.
AU - Ataoglu, S.
AU - Gulluoglu, Arif N.
AU - Tripathi, Ambuj
AU - Avasthi, D. K.
PY - 2009/10/15
Y1 - 2009/10/15
N2 - Changes in the optical, structural, dielectric properties and surface morphology of a polypropylene/TiO2 composite due to swift heavy ion irradiation were studied by means of UV-visible spectroscopy, X-ray diffraction, impedance gain phase analyzer and atomic force microscopy. Samples were irradiated with 140 MeV Ag11+ ions at fluences of 1 × 1011 and 5 × 1012 ions/cm2. UV-visible absorption analysis reveals a decrease in optical direct band gap from 2.62 to 2.42 eV after a fluence of 5 × 1012 ions/cm2. X-ray diffractograms show an increase in crystallinity of the composite due to irradiation. The dielectric constants obey the Universal law given by ε α f n-1, where n varies from 0.38 to 0.91. The dielectric constant and loss are observed to change significantly due to irradiation. Cole-cole diagrams have shown the frequency dependence of the complex impedance at different fluences. The average surface roughness of the composite decreases upon irradiation.
AB - Changes in the optical, structural, dielectric properties and surface morphology of a polypropylene/TiO2 composite due to swift heavy ion irradiation were studied by means of UV-visible spectroscopy, X-ray diffraction, impedance gain phase analyzer and atomic force microscopy. Samples were irradiated with 140 MeV Ag11+ ions at fluences of 1 × 1011 and 5 × 1012 ions/cm2. UV-visible absorption analysis reveals a decrease in optical direct band gap from 2.62 to 2.42 eV after a fluence of 5 × 1012 ions/cm2. X-ray diffractograms show an increase in crystallinity of the composite due to irradiation. The dielectric constants obey the Universal law given by ε α f n-1, where n varies from 0.38 to 0.91. The dielectric constant and loss are observed to change significantly due to irradiation. Cole-cole diagrams have shown the frequency dependence of the complex impedance at different fluences. The average surface roughness of the composite decreases upon irradiation.
KW - Atomic force microscope
KW - Electrical measurement
KW - Optical spectroscopy
KW - Polypropylene/TiO composite
KW - X-ray diffraction
UR - http://www.scopus.com/inward/record.url?scp=70349478595&partnerID=8YFLogxK
U2 - 10.1016/j.nimb.2009.07.016
DO - 10.1016/j.nimb.2009.07.016
M3 - Article
AN - SCOPUS:70349478595
SN - 0168-583X
VL - 267
SP - 3456
EP - 3460
JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
IS - 20
ER -