Estimation of optical band gap and carbon cluster sizes formed in heavy ion irradiated polycarbonate

Optical properties of CR-39 Detector Irradiated with Gamma-rays and (He-Ne) Laser

“…The assimilation groupings in the researched opportunity of wavelengths are related to the π-π* electronic moves [14][15][16][17][18].…”

Gamma Radiation Induced Modifications on Physicochemical Properties of Makrofol (KG and N) Polycarbonate

“…The variation in peak width due to gamma irradiation indicates the modification in the crystallite size (L) of the polymers, which is calculated by using the following equation given by Scherrer 20,21 :…”

Ion bombardment induced changes in the optical and electrical properties of polycarbonate

“…Although the energies of the ion beams (130 keV for He and 320 keV for Ar) are too low to interact with the total thickness of the PC films (350 lm), but their values were quite enough to induce changes near the surface of the samples. The decrease in both E g and E P values is due to the formation of carbon clusters near the surface of the polymer [18,22], due to the energy transferred from the ion beams. The increase in the fluence of both He and Ar ions may increase the size of these carbon clusters, which, in turn, can decrease the energy required to induce optical transitions from the valence to the conduction band.…”

“…Table 2 Optical and electrical parameters for PC films irradiated with ion beams Furthermore, the irradiation of PC films with ion beam resulted in the creation or enhancing of free radicals [23]. These free radicals are mainly resulted from the chain-scission [12,22,24]. The increase of the free radicals, due to the increase of ion fluence, may increase the mobility of free charge carriers.…”