@article { ISI:000252678500008, title = {XPS and AFM investigations on silver-based photoimageable thick film systems}, journal = {Microelectronics International}, volume = {25}, number = {1}, year = {2008}, month = {JAN}, pages = {46-57}, publisher = {EMERALD GROUP PUBLISHING LIMITED}, type = {Article}, address = {HOWARD HOUSE, WAGON LANE, BINGLEY BD16 1WA, W YORKSHIRE, ENGLAND}, abstract = {

Purpose - The purpose of this paper is to ascertain chemical changes occurring at various stages involved in processing of silver-based photoimageable thick films; and to determine ensuing topographical features which other wise appeared to be hindered in 2D scanning electron microscopy. Design/methodology/approach - Surface sensitive techniques, viz. X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM) were used. Findings - Interfacial adhesion of silver film with substrate (Al(2)O(3)) was specifically looked into with respect to role played by photoimaging (before and after exposure to ultra-violet light). XPS results revealed occurrence of subtle chemical changes in terms of unsaturation to saturation in C-C bonding and also an interesting C-Al bonding which presumably improves mechanical adhesion of unfired film with the alumina substrate. AFM was carried out to examine the surface roughness, particle size, and microstructure of film which are very important from the standpoint of high-frequency applications. Originality/value - Surface sensitive techniques like XPS and AFM were exclusively used in order to characterize silver-based photoimageable thick films.

}, keywords = {microscopy, Silver, thick film circuits, X-rays}, issn = {1356-5362}, doi = {10.1108/13565360810846653}, author = {Umarji, Govind and Ketkar, Supriya and Hawaldar, Ranjit R. and Gosavi, Suresh W. and Patil, Kashinath and Mulik, Uttam P. and Amalnerkar, Dinesh P.} } @article { ISI:000355656000012, title = {Tuning magnetic behavior of nanoscale cobalt sulfide and its nanocomposite with an engineering thermoplastic}, journal = {Journal of Electronic Materials}, volume = {44}, number = {7}, year = {2015}, month = {JUL}, pages = {2308-2311}, publisher = {SPRINGER}, address = {233 SPRING ST, NEW YORK, NY 10013 USA}, abstract = {

Nanocomposites containing magnetic nanoparticles embedded in a polymer matrix with good thermal stability (up to 200A degrees C) are technologically important. We report an environmentally benign solid-solid approach for synthesis of cobalt sulfide and its nanocomposite using a thermally stable matrix of polyphenylene sulfide. Physicochemical characterizations reveal the formation of nanoclusters of the hexagonal phase CoS. Even though bulk CoS is nonmagnetic, magnetization studies exhibit anomalous magnetic behavior for phase-pure nanoscale CoS and its nanocomposites.

}, keywords = {Nanocomposite, polyphenylene sulfide, Solid-solid reaction, superparamagnetic}, issn = {0361-5235}, doi = {10.1007/s11664-015-3753-1}, author = {Rumale, Narendra and Arbuj, Sudhir S. and Umarji, Govind and Shinde, Manish and Mulik, Uttam P. and Joy, Pattayil Alias and Amalnerkar, Dinesh P.} } @article {45744, title = {Concurrent synthesis of SnO/SnO2 nanocomposites and their enhanced photocatalytic activity}, journal = {Journal of Solid State Electrochemistry}, volume = {21}, year = {2017}, month = {JAN}, pages = {9-17}, type = {Article}, abstract = {

The SnO/SnO2 nanocomposites were synthesized using semisolvothermal reaction technique. These nanocomposites were prepared using different combination of solvents viz., ethanol, water, and ethylene glycol at 180 A degrees C for 24 h. The synthesized nanocomposites were analyzed with various characterization techniques. Structural analysis indicates the formation of tetragonal phase of SnO2 for the sample prepared in ethanol, whereas for other solvent combinations, the mixture of SnO and SnO2 having tetragonal crystal structures were observed. The optical study shows enhanced absorbance in the visible region for all the prepared SnO/SnO2 nanocomposites. The observed band gap was found to be in the range of 3.0 to 3.25 eV. Microstructural determinations confirm the formation of nanostructures having spherical as well as rod-like morphology. The size of nanoparticles in ethanol-mediated solvent was found to be in the range of 5 to 7 nm. Thermogravimetric analysis indicate the weight gain around 1.3 wt\% confirming the conversion of SnO to SnO2 material. The photocatalytic activity of synthesized nanocomposites was evaluated by following the aqueous methylene blue (MB) degradation. The sample prepared in ethylene glycol-mediated solvent showed highest photoactivity having apparent rate constant (K-app) 0.62 x 10(-2) min(-1).

}, keywords = {Dye-degradation, Nanocomposite, Photocatalysis, tin oxide}, issn = {1432-8488}, doi = {10.1007/s10008-016-3328-y}, author = {Roy, Animesh and Arbuj, Sudhir and Waghadkar, Yogesh and Shinde, Manish and Umarji, Govind and Rane, Sunit and Patil, Kashinath and Gosavi, Suresh and Chauhan, Ratna} }