NOPR Collection:
http://nopr.niscpr.res.in/handle/123456789/55690
2026-10-11T12:12:49ZI – V characterization of vacuum deposited zinc selenide – silicon hetero junction
http://nopr.niscpr.res.in/handle/123456789/55708
Title: I – V characterization of vacuum deposited zinc selenide – silicon hetero junction
Authors: Keshav, Rashmitha; Vali, Indudhar Panduranga; Shetty, P K; Vaishnavi, K S; Rajeshwari, M; Mahesha, M G
Abstract: Zinc selenide (ZnSe) thin films were grown on silicon (Si) wafer by thermal evaporation and the hetero-structure was subjected to annealing at various temperatures. X-ray diffractogram recorded for various samples were analysed to extract the structural information including crystallite size, strain and dislocation density. ZnSe films exhibited cubic structure with (111) orientation and the crystallite size has increased from about 21 nm to 43 nm upon annealing at 673 K. Annealing at temperature above this has degraded the films. I – V characterization has shown nonlinear relation and affected by post deposition annealing. Thermionic emission and Cheung models were applied to obtain various parameters that assess the performance of hetero-structured devices. Minimum ideality factor was observed (n = 1.75 from Cheung Model) for as deposited system and it increased after annealing. Analysis has proven that series resistance increases after annealing under air ambience.
Page(s): 841-8462020-12-01T00:00:00ZSynthesis and spectral analysis of (S)-7-(4-chlorophenyl)-6,7-dihydrothiazolo [4,5-d]pyrimidine-2,5(3H,4H)-dione and study of its quantum chemical properties
http://nopr.niscpr.res.in/handle/123456789/55707
Title: Synthesis and spectral analysis of (S)-7-(4-chlorophenyl)-6,7-dihydrothiazolo [4,5-d]pyrimidine-2,5(3H,4H)-dione and study of its quantum chemical properties
Authors: Parveen, Huda; Bishnoi, Abha; Iqbal, Aaherasha; Afza, Nishat; Rai, Sonam
Abstract: In this article, synthesis and quantum chemical properties of novel (S)-7-(4-chlorophenyl)-6,7-dihydrothiazolo[4,5-d]pyrimidine-2,5(3H,4H)-dione (CPTHZ) are described. The aim of this synthesis was to obtain biologically active thiazolidinone scaffolds and correlates its quantum chemical properties with its experimental results. The structure of the compound was characterized by using different spectral analysis. The chemical calculations were computed with the help of DFT level of theory using Becke3–Lee–Yang–Parr (B3LYP)) and Coulomb–Attenuated–Method–Becke3–Lee–Yang–Parr (CAM-B3LYP)/6-31G(d,p) basis set. Thermodynamic properties were calculated at diverse temperatures. Various structural and thermodynamic parameters such as electrophilicity, chemical potential, chemical hardness and maximum amount of electronic charge transfer were done for this compound. The local reactivity descriptors showed that most reactive site for nucleophilic attack was C(7). In addition to it, correlation graphs between experimental and calculated values of <sup>1</sup>HNMR and <sup>13</sup>CNMR were also presented.
Page(s): 847-8572020-12-01T00:00:00ZModeling of soil water retention based on 3D micro-tomographic image analysis
http://nopr.niscpr.res.in/handle/123456789/55706
Title: Modeling of soil water retention based on 3D micro-tomographic image analysis
Authors: Oliveira, JAT de; Pires, L F; Cássaro, FAM; Brinatti, A M; Saab, S C
Abstract: This paper proposes the use of an algorithm based on the mercury intrusion porosimetry (MIP) method to obtain the water retention characteristic curve (pF curve) of a soil under different treatments. 3D X-ray micro-tomographic images were used to quantify pore size distribution, which was employed for the evaluation of the water retention in different matric potentials. The results showed very good agreement between the traditional method (obtained by suction tables) and that one based on the MIP algorithm. It means that the use of simulation procedures can be an interesting alternative for the measurement of soil water retention properties.
Page(s): 858-8632020-12-01T00:00:00ZElectrochemical and lithium-ion transport properties of layered Li-rich Li1.10(Ni0.32X0.01Co0.33Mn0.33)O2 (X = Dy/Gd/Ho) positive electrodes
http://nopr.niscpr.res.in/handle/123456789/55705
Title: Electrochemical and lithium-ion transport properties of layered Li-rich Li1.10(Ni0.32X0.01Co0.33Mn0.33)O2 (X = Dy/Gd/Ho) positive electrodes
Authors: Kumar, P Senthil; Sakunthala, A; Reddy, M V; Rao, R Prasada; Chowdari, B V R; Adams, S
Abstract: Layer structured Li<sub>1.10</sub>(Ni<sub>0.32</sub>X<sub>0.01</sub>Co<sub>0.33</sub>Mn<sub>0.33</sub>)O<sub>2</sub> (X = Dy/Gd/Ho) compounds were synthesized via the microwave assisted solvothermal route. The impacts of doping on the electrical and electrochemical properties of Li<sub>1.10 </sub>(Ni<sub>0.32</sub>X<sub>0.01</sub>Co<sub>0.33</sub>Mn<sub>0.33</sub>)O<sub>2</sub> compounds were investigated. Rietveld refined XRD pattern showed Li<sub>1.10 </sub>(Ni<sub>0.32</sub>X<sub>0.01</sub>Co<sub>0.33</sub>Mn<sub>0.33</sub>)O<sub>2</sub> compounds with layered hexagonal structure. SEM images revealed the compounds with micrometer sized grains. The Li<sub>1.10 </sub>(Ni<sub>0.33</sub>Co<sub>0.33</sub>Mn<sub>0.33</sub>)O<sub>2 </sub>compound delivered an initial discharge capacity of 197 mAh/g at 0.2C and retained a capacity of 163mAh/g after 50<sup>th</sup> cycle in the voltage window of 2.5-4.6V. The cycling stability of Li<sub>1.10</sub>(Ni<sub>0.33</sub>Co<sub>0.33</sub>Mn<sub>0.33</sub>)O<sub>2 </sub>compound was improved with rare earth doping. Li<sub>1.10</sub>(Ni<sub>0.32</sub>Dy<sub>0.01</sub>Co<sub>0.33</sub>Mn<sub>0.33</sub>)O<sub>2 </sub>compound delivered the discharge capacity of 166 mAh/g after50<sup>th</sup> cycle in the potential window 2.5-4.6V at 0.2C with 100% capacity retention. AC impedance studies displayed the electrical conductivity in the order of 10<sup>-6</sup> S/cm. Wagner polarization analysis revealed the improvement in electronic transference number <em>via</em> rare earth doping.
Page(s): 864-8762020-12-01T00:00:00Z