The Electrical Resistance Modulation in Silver Oxide Thin Films as a function of Thickness

Devidas G B — Fri, 29 May 2026 00:00:00 +0000

Silver oxide (Ag2O) thin films was deposited on to engraved fluorine –doped tin oxide (FTO ) glass surface using the Radio frequency (RF) sputtering technique. Post deposition, the layer was annealed at 200 C for 2 hours .the film thickness varies from 42 nm to 660 nm , was measured with a three dimensional (3D) non contact optical profiler .current voltage (I-V) characteristics was measured at room temperature , it reveals that the electrical resistivity of the thin films increased with increasing thickness. The Vander pauv method was used determine the electrical resistance, X-ray diffraction (XRD) examinations were used to assess the films structural characteristics, and field emission scanning electron microscopy (FESEM) was used to analyzed the surface morphology.

Dipole Moments and Computational Study of 4(3IP)6MC and 4(3IP)6CLC Iodinated Coumarin Derivatives

Manjula Katageri, Srinath, Shivaleela B, Sulochana Devar, S. M. Hanagodimath — Fri, 29 May 2026 00:00:00 +0000

The comparative spectroscopic properties of the iodinated coumarin derivatives, viz., 4-(3-Iodo-phenoxymethyl)-6-methyl-chromen-2-one [4(3IP)6MC] and 6-Chloro-4-(3-iodo-phenoxymethyl)-chromen-2-one [4(3IP)6ClC], were investigated. Ground-state and excited-state dipole moments were evaluated by employing the solvatochromic shift method through the Lippert, Bakshiev, and Kawski–Chamma–Viallet equations in pure organic solvents at room temperature. Both compounds exhibited a bathochromic shift as a result of the excited-state dipole moments being greater than the ground-state dipole moments. This suggests a higher polarity in the excited state and validates the existence of intramolecular charge transfer. The change of dipole moment was 4.4D for 4(3IP)6MC and 4.9D for 4(3IP)6CLC. The Kamlet-Taft and Catalán linear solvation energy relationship model was further analyzed, revealing that hydrogen bonding interactions dominate over the dielectric interactions and dipolarity contributes to a lesser extent than polarizability for both molecules. The theoretical computational study was carried out with Gaussian 16W at the DFT/B3LYP/3-21G level. The frontier molecular orbitals (FMO) and nonlinear optical (NLO) parameters were evaluated. The results show notable enhanced parameters for 4(3IP)6CLC, indicating its potential as an efficient NLO material for advanced optical and imaging applications.

Mapana Journal of Sciences

The Electrical Resistance Modulation in Silver Oxide Thin Films as a function of Thickness

Dipole Moments and Computational Study of 4(3IP)6MC and 4(3IP)6CLC Iodinated Coumarin Derivatives