Lal Bahadur Shastri College

Sātāra, India

Lal Bahadur Shastri College

Sātāra, India
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Kamble S.S.,University of Solapur | Kamble S.S.,k-Technology | Dubal D.P.,Catalan Institute of Nanoscience and Nanotechnology | Tarwal N.L.,Lal Bahadur Shastri College | And 4 more authors.
Journal of Alloys and Compounds | Year: 2016

We have synthesized a series of ZnxCo1-xS (0 ≤ x ≤ 0.4) thin films via the facile and industry preferred chemical deposition. Under the pre-optimized conditions (temperature = 80 ± 0.5 °C, substrate rotation = 65 ± 2 rpm, pH = 9.0 ± 0.1 and duration = 90 min) the deposited films were physically hard, uniform, tightly adherent to the substrate support. As-grown CoS and ZnxCo1-xS thin films were analyzed for compositional analysis, structural determinations, morphological studies and optical measurements. Elemental analysis determined replacement of Co2+ ions from the CoS lattice by Zn2+ ions, while a trivial scattering in the virtually constant S-content was observed. Elemental analysis using X-ray photoelectron spectroscopy established chemical states of constituting elements as Co2+, Zn2+ and S2-. Hexagonal structure with growth orientation along <101> up to x = 0.25 was observed in the structural studies and above x = 0.25, change in growth orientation along <100> was detected. Enhancement in self-organized growth module ensued the formation of fuzzy microstructure. Improvement in the hillocks with the integration of Zn2+ into CoS host was countersigned in the surface topography. The optical transmission spectra of the CoS and ZnxCo1-xS thin films were analyzed to evaluate the absorption coefficient (α). A systematic increase in α has been found and can be attributed to the creation of more localized states within the band tails due to the existence of defects and disorders. © 2015 Elsevier B.V. All rights reserved.

Kolekar T.V.,Visvesvaraya Technological University | Kolekar T.V.,Rajarambapu Institute of Technology | Thorat N.D.,The Interdisciplinary Center | Yadav H.M.,University of Seoul | And 5 more authors.
Ceramics International | Year: 2016

Biocompatible materials based on hydroxyapatite are potentially attractive for a wide range of medical applications. The effect of aluminium substitution on the biocompatibility of hydroxyapatite (HA) under the physiochemical conditions has been investigated. Various samples of aluminium doped hydroxyapatite (Al-HA) with different concentration (0, 0.5, 1.0, 1.5, 2.0, 2.5 mol%) were successfully synthesised by solution combustion method and characterized by X-ray Diffraction (XRD), Transmission Electron Microscopy (TEM), and Scanning Electron Microscopy (SEM), and thermal analysis technique. XRD and TEM results reveal uniform and crystalline nature of Al-HA nanoparticles. The biocompatibility of the Al-HA nanoparticles was studied using L929 cell lines by MTT assays up to 24 h. These Al-HA nanoparticles are biocompatible on cell lines L929 and do not have toxic effects for further possible in vivo applications. The results of these studies confirmed the biocompatibility of Al-HA and demonstrated the suitability for biomedical applications. The present work reveals the importance of structural, morphological, biocompatible properties of Al-HA nanoparticles and predicts the suitability for biomedical applications. © 2015 Elsevier Ltd and Techna Group S.r.l.

Harale N.S.,Shivaji University | Kamble A.S.,Chonnam National University | Kamble A.S.,Bw Commerce And Science College | Tarwal N.L.,Lal Bahadur Shastri College | And 4 more authors.
Ceramics International | Year: 2016

Vertically aligned ZnO nanorods (ZNRs) arrays with various aspect ratios were deposited by using a simple and inexpensive hydrothermal route at relatively low temperature of 90°C. The influence of hydroxide anion generating agents in the solution on the growth of ZNRs arrays was studied. Hexamethylenetetramine (HMTA) and ammonia were used as hydroxide anion generating agents while polyethyleneimine (PEI) as structure directing agent. The combined effect of these three agents plays a crucial role in the growth of ZNRs arrays with respect to their rod length and diameter, which controls the aspect ratio. The deposited ZNRs exhibited hexagonal wurtize crystal structure with preferred orientation along (002) plane. The highly crystalline nature and pure phase formation of ZNRs was confirmed from FT-Raman studies. The maximum gas response (Rg/Ra) of 67.5 was observed for high aspect ratio ZNRs, deposited with combination of HMTA, ammonia as well as PEI. The enhancement in gas response can be attributed to high surface area (45 cm2/g) and desirable surface accessibility in high aspect ratio ZNRs. Fast response-recovery characteristics, especially a much quicker gas response time of 32s and recovery time of 530s were observed at 100ppm NO2 gas concentration. © 2016.

Kamble S.S.,University of Solapur | Kamble S.S.,k-Technology | Sikora A.,Electrotechnical Institute Warsaw | Deshmukh S.L.,University of Solapur | And 5 more authors.
Materials Letters | Year: 2016

The synthesis of multicomponent semiconducting thin films has become the subject of intensive research. The development of deposition-characterization techniques and property correlation and understanding of these materials are critical for the successful implementation of a whole new generation of advanced micro-devices. A wide range of discussion made in this article include facile chemical synthesis of Zn, Cd(CoS) thin films and characterization pertaining to the studies on compositional, morphological, optical and electrical transport aspects. The overall discussion involved herein will be useful to establish further engrossment of the researchers in the mentioned quaternary system. © 2016 Elsevier B.V. All rights reserved.

Patil V.B.,University of Solapur | Tarwal N.L.,Lal Bahadur Shastri College | Mujawar S.H.,Mahatma Phule Mahavidyalaya | Mulla I.S.,MET Tech | And 2 more authors.
Journal of Materials Science: Materials in Electronics | Year: 2016

Titanium doped WO3 (Ti doped WO3) nanostructures were synthesized by hydrothermal synthesis by the controlled hydrolysis of Na2WO4 using oxalic acid and Titanium tetrachloride. Prepared samples were characterized by X-ray powder diffraction (XRD), scanning electronic microscopy (SEM), and transmission electron microscopy (TEM). As-synthesized pristine WO3 showed nanorods with diameters of about 10–15 nm and length about 1.2 µm and Ti doped WO3 composed of numerous small nanocrystals. Introduction of Ti doping by chemical synthesis process suppressed the growth of one-dimensional nanorods along their axis direction and shows agglomeration of particulate like morphology and no elongated structures. Ti doping not only lowered the optimal operating temperature of WO3 nanostructures sensors from 250 to 200 °C but also increased the maximum value of sensor response. Also the Ti-doped WO3 nanostructures exhibited rapid response characteristic to NO2 gas compared to pristine WO3. © 2016 Springer Science+Business Media New York

Patil V.S.,Lal Bahadur Shastri College | Patil S.V.,Yashwantrao Chavan Institute of Science | Deshmukh H.V.,Yashwantrao Chavan Institute of Science | Pathade G.R.,Fergusson College
Nature Environment and Pollution Technology | Year: 2013

Soil salinity is a major problem in Maharashtra. Attempt is made to isolate salt-tolerant, thermotolerant, nitrogen fixing, phosphate solubilising Azotobacter spp. from the saline soil of Khodashi village in Satara district. Eight Azotobacter spp. were isolated from the saline soils. They were confirmed based on morphological, cultural and biochemical characteristics. They were tested for saline and thermal tolerance. The phosphate solubilizing potential of the these Azotobacter isolates was qualitatively evaluated by the formation of halos (clear zones) around the colonies growing on solid medium containing tribasic calcium phosphate as a sole phosphorus source. The results showed that phosphate solubilising, salt tolerant and thermotolerant Azotobacter spp. could be a promising source for the development of saline-Alkali soil-based agriculture.

Jadhav P.,Shivaji University | Patankar K.,Rajaram College | Mathe V.,University of Pune | Tarwal N.L.,Lal Bahadur Shastri College | And 3 more authors.
Journal of Magnetism and Magnetic Materials | Year: 2015

Ni0.8Co0.2-2xCuxMnxFe2O4 ferrites (with x=0.01, 0.03, 0.05, 0.07 and 0.09) were prepared using solution combustion route. X-ray diffraction analysis indicates the presence of the characteristic most intense (311) peak along with other reflections confirming the formation of spinel ferrite in each composition. SEM images show formation of porous structured agglomerates with submicron sized grains. The microstrain measurement of ferrite series is non-linear with variation in dopant concentration for a given magnetic field. The magnetic hysteresis at room temperature indicates the ferrimagnetic behavior of synthesized ferrite system. The magnetic and mechanical properties were seen to be comparatively higher for x=0.07 composition. The presence of sexset in Mössbauer spectra confirms the ferrimagnetic nature of all the ferrites. © 2015 Elsevier B.V. All rights reserved.

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