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The X-ray and vibrational spectroscopic analysis of a new molecular complex of guanidine and acrylic acid are reported. The crystal of C(NH 2 ) 2 (NH) * CH 2 CHCOOH belongs to Pna2 1 space group of orthorhombic system with Z=4, a=9.9242(34)Å, b, c=8.3951(14)Å. In the crystal structure the macroscopic symmetry center is absent.The differential scanning calorimetric...
Plasma enhanced chemical vapor deposition was used to deposit hydrogenated silicon nitride (SiNx:H) thin films using two gas mixtures: SiH4/NH3 AND SiH4/N2. NH3 and N2 gas flowrates were the only deposition parameters varied. Surface morphology of all the samples was observed with the help of atomic force microscopy (AFM). Fourier transform infrared spectroscopy (FTIR) was utilized to examine the...
Brush-like chitosan-g-poly(D,L-lactide) copolymers were synthesized effectively by bulk ring-opening polymerization of D,L-lactide(D,L-LA) using chitosan (CS) as macroinitiator under microwave irradiation. The graft copolymers were characterized by FT IR, 1H NMR, EA, XRD, and TGA. The results showed that the synthesis of the chitosan-g-polylactide copolymer via microwave heating was much faster than...
The nano-structured InGaAs films have been prepared by molecular beam epitaxy at different substrate temperature. The substrate temperature was varied from 400degC to 20degC. The samples were characterized by X-ray diffraction and absorption spectra. The results show that the grain size of InGaAs films and the bandgap width increase with increasing substrate temperature. The as-deposited nano-structured...
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