Journal ArticleDOI
Effect of Doping and Irradiation on Optical Parameters of Triglycine Sulphate Single Crystals
M. A. Gaffar,A. Abu El-Fadl +1 more
TLDR
In this article, the effect of gamma-radiation on electrical and optical parameters was investigated using triglycine sulphate (TGS) doped with orthonitroaniline (ONA) irradiated with different doses of gamma radiation.Abstract:
Crystals of triglycine sulphate (TGS) doped with orthonitroaniline (ONA) irradiated with different doses of gamma-radiation were used to investigate gamma-radiation effect on electrical and optical parameters The absorption coefficient and the reflectance were measured and hence the extinction coefficient, the optical refractive index and the dielectric constants (er′, er″) of unirradiated and irradiated TGS crystals were calculated Values of the allowed indirect optical energy gap Egopt of TGS doped with ONA were calculated as a function of gamma-dose Value of Egopt decreases from 472 eV to 425 eV with increasing gamma-doses from 0 up to 3 Mrad The values of the static dielectric constant er(0) and the effective electrical conductivity sigma0 at room temperature and their dependence on gamma-dose were also calculatedread more
Citations
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Journal ArticleDOI
Effect of gamma radiation on low density polyethylene (LDPE) films: Optical, dielectric and FTIR studies
TL;DR: Results indicates small variation in crystallinity which could be increased or decreased depending on the relative importance of the structural and chemical changes.
Journal ArticleDOI
Electron induced modifications in the optical properties of polypropylene
TL;DR: In this article, the effect of electron beam (EB) irradiation on polypropylene (PP) films has been studied via different techniques, namely, x-ray diffraction and UV-Vis absorption spectroscopy.
Journal ArticleDOI
Ion bombardment induced changes in the optical and electrical properties of polycarbonate
TL;DR: The changes in the optical and electrical properties of polycarbonate (PC) films, bombarded with He and Ar ion beams, have been studied in this paper, where the surface morphology of the unirradiated and irradiated PC films was studied using scanning electron microscopy (SEM) technique.
Journal ArticleDOI
Growth and characterization of doped DTGS crystals for infrared sensing devices
TL;DR: In this paper, modified deuterated triglycine sulfate (DTGS) single crystals have been grown from the aqueous solution simultaneously doped with l -alanine and neodymium sulfate in the ferroelectric phase using temperature-lowering technique.
Journal ArticleDOI
Growth and Characterization of Doped TGS Crystals for Infrared Devices
TL;DR: In this paper, modified triglycine sulfate (TGS) single crystals were grown from aqueous solution by doping with urea, yttrium sulfate, l-serine + cobalt sulfate and l-alanine + urea in the ferroelectric phase using a temperature lowering technique.
References
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Journal ArticleDOI
Simple band model for amorphous semiconducting alloys
TL;DR: Amorphous covalent alloys particularly of group-IV, -V, and -VI elements are readily formed over broad ranges of composition and have been described as low-mobility electronic intrinsic semiconductors with a temperature-activated electrical conductivity σ = σ 0×exp(-ΔE/kT) which sometimes extends well into the molten state as discussed by the authors.
Journal ArticleDOI
Electric conductivity of tgs, pure and with lattice defects
B. Hilczer,M. Michalczyk +1 more
TL;DR: In this article, the temperature dependence of dc steady state conductivity was measured in the three crystallographic directions for pure and y-irradiated TGS single crystals, and an exponential law was obeyed from 20 to 80°C, with a change in activation energy at Tc.
Journal ArticleDOI
Ferroelectric behaviour of triglycine sulphate crystals containing low concentrations of metal ions near the transition temperature
TL;DR: In this article, the parameters of the statistical dipolar theory of ferroelectrics are derived from dielectric constant and hysteresis loop measurements, allowing a distinction between atomic and dipolar polarisation.
Journal ArticleDOI
Dielectric and pyroelectric properties of TGS crystals doped with nitroaniline molecules
T. Krajewski,T. Breczewski +1 more
TL;DR: In this paper, TGS crystals grown isothermally in ferroelectric phase were doped with ortho- meta- and para-nitroaniline molecules with dipole moments from 4 up to 6 D.
Journal ArticleDOI
Influence of defects on the optical behaviour of tgs crystals near the fundamental absorption edge
B. Hilczer,S. Balanicka +1 more
TL;DR: In this article, the optical absorption and the refractive index of TGS single crystals were measured in the wavelength region near the absorption edge, where the absorption bands due to irradiation and doping were found, a beginning of anomalous dispersion was observed.
Related Papers (5)
Growth and properties of triglycine sulfate (TGS) crystals: Review
Ravindra B. Lal,Ashok K. Batra +1 more