@article { ISI:000230823200014, title = {Growth of PbS nanopyramidal particulate films for potential applications in quantum-dot photovoltaics and nanoantennas}, journal = {Materials Research Bulletin }, volume = {40}, number = {8}, year = {2005}, month = {AUG}, pages = {1353-1360}, publisher = {PERGAMON-ELSEVIER SCIENCE LTD}, type = {Article}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND}, abstract = {

We report a simple interfacial process called the liquid-liquid interface reaction technique (LLIRT) that leads to the formation of nanosized PbS particulate films with hitherto unreported pyramidal morphology. The resultant PbS films were characterized by transmission electron microscopy (TEM) with selected area electron diffraction (SAED), X-ray diffractometery (XRD), atomic force microscopy (AFM), near field scanning optical microscopy (NSOM) and UV-vis spectroscopy. The pyramidal morphology is speculated to originate from the preferred orientation of the 2 2 0 plane of cubic PbS. Our nanopyramidal PbS particulate films display remarkably sharp excitonic peak centered around 656 nm that accounts for a band gap of 1.8 eV suggesting, in turn, their potential application in QD photovoltaics. Interestingly, the feasibility of such nanopyramids to potentially act as nanoantennas (as revealed by the NSOM) is also suggested. (c) 2005 Elsevier Ltd. All rights reserved.

}, keywords = {Atomic force microscopy, Chemical synthesis, Electron microscopy, Nanostructures, Optical properties}, issn = {0025-5408}, doi = {10.1016/j.materresbull.2005.04.018}, author = {Hawaldar, Ranjit R. and Mulik, Uttam P. and Patil, K. and Pasricha, R. and Sathaye, S. and Lewis, A. and Amalnerkar, Dinesh P.} } @article { ISI:000225750600004, title = {Novel polymer-inorganic solid-state reaction for the synthesis of CdS nanocrystallites}, journal = {Materials Letters}, volume = {59}, number = {5}, year = {2005}, month = {FEB}, pages = {554-559}, publisher = {ELSEVIER SCIENCE BV}, address = {PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS}, abstract = {

We offer a novel polymer-inorganic solid-state reaction route for the in situ generation of nanochalcogenide semiconductor in the network of polymer which itself acts as a chalcogen source. We have exemplified feasibility of this route by reacting CdI2 with engineering thermoplastic polyphenylene sulphide (PPS). These two reactants in 1:1 and 10:1 molar ratios were simply heated at the crystalline melting temperature of PPS. The resultant products were characterized by X-ray diffractometry, Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM, with selected area electron diffraction). The prima facie observations revealed the formation of cubic nanocrystallites of US with the particle size ranging from 6 to 20 nm entrapped in modified (cyclized) PPS matrix when the reactants were taken in 10:1 molar ratio. A tentative mechanism has been suggested for such hitherto unattempted solid-state reaction. (C) 2004 Elsevier B.V. All rights reserved.

}, keywords = {CdS nanocrystallites, Semiconductor, solid-state reaction, Thermoplastic polymer matrix}, issn = {0167-577X}, doi = {10.1016/j.matlet.2004.10.037}, author = {Kanade, K. G. and Hawaldar, Ranjit R. and Pasricha, R. and Radhakrishnan, S. and Seth, T. and Mulik, Uttam P. and Kale, B. B. and Amalnerkar, Dinesh P.} } @article { ISI:000228436200035, title = {Self-assembly of nanostructured PbS for solar photovoltaic applications}, journal = {Materials Chemistry and Physics}, volume = {91}, number = {2-3}, year = {2005}, month = {JUN}, pages = {447-453}, publisher = {ELSEVIER SCIENCE SA}, type = {Article}, address = {PO BOX 564, 1001 LAUSANNE, SWITZERLAND}, abstract = {

In the present communication, the self-assembly of nanocrystalline PbS at the liquid-liquid interface is reported. The PbS nanocrystals were, subsequently, transformed in the form of thin films by dip coating. The resultant Q-PbS films were characterized by SEM-EDAX, TEM-SAED, XRD, XPS and UV-vis Spectroscopy. Pyramidal features at the nanometer scale, preferred orientation along (2 2 0) and (4 0 0) planes of cubic structure and a sharp excitonic peak at 656 run are the salient aspects of this work. The band-gap of the order of 1.8 eV (associated with the excitonic feature) is ideally suited for solar photovoltaic applications. (c) 2004 Elsevier B.V. All rights reserved.

}, keywords = {Liquid-liquid interface, nanopyramid, Nanostructures, PbS}, issn = {0254-0584}, doi = {10.1016/j.matchemphys.2004.12.007}, author = {Hawaldar, Ranjit R. and Kanade, K. G. and Patil, K. R. and Sathaye, S. D. and Mulik, Uttam P. and Amalnerkar, Dinesh P.} } @article { ISI:000254017900032, title = {Facile single-step technique for simultaneous in situ fabrication of Ag/Ag2S-polymer nanocomposites via PPS cyclization route}, journal = {Chemistry Letters}, volume = {37}, number = {2}, year = {2008}, month = {FEB}, pages = {194-195}, publisher = {CHEMICAL SOC JAPAN}, type = {Article}, address = {1-5 KANDA-SURUGADAI CHIYODA-KU, TOKYO, 101-8307, JAPAN}, abstract = {

We herein propose a facile single-step approach involving solid-state reaction between silver salt and engineering thermoplastic polyphenylene sulfide for simultaneous in situ generation of nanoscale metallic silver as well as semiconducting silver sulfide.

}, issn = {0366-7022}, doi = {10.1246/cl.2008.194}, author = {Waghmare, Sujata and Shinde, Manish and Gholap, Ramkrishna S. and Rao, N. Koteswara and Seth, Tanay and Amalnerkar, Dinesh P.} } @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:000271238900017, title = {Concurrent In-situ formation of Ag/Ag2S nanoparticles in polymer matrix by facile polymer-inorganic solid state reaction}, journal = {Journal of Nano Research}, volume = {5}, year = {2009}, month = {JAN}, pages = {143-152}, publisher = {TRANS TECH PUBLICATIONS LTD}, address = {LAUBISRUTISTR 24, STAFA-ZUERICH, CH-8712, SWITZERLAND}, abstract = {

We herein report the feasibility of polymer-inorganic solid-state reaction route for simultaneous in situ generation of Ag \& Ag2S nanostructures in polymer network wherein an engineering thermoplastic, polyphenylene sulphide (PPS), itself acts as a chalcogen source as well as a stabilizing matrix for the resultant nanoproducts. Typical solid-state reaction was accomplished by simply heating the physical admixture of the two reactants i.e. AgNO3 and PPS by varying molar ratios mainly 1:1, 1:5, 1:15, 1:20, at the crystalline melting temperature (285 degrees C) of PPS. The synthesized nanoparticles were characterized by various physico-chemical techniques like X-ray Diffractometry, Scanning Electron Microscopy equipped with EDAX, Transmission Electron Microscopy and UV-Visible spectroscopy. The prima facie observations suggest the effective formation and subsequent entrapment of mainly nanocrystalline metallic silver (fcc) in PPS matrix for all the molar ratios chosen for the reaction. Additionally, simultaneous occurrence of nanocrystalline Ag2S (monoclinic phase) is also noticed in case of heated admixture of AgNO3: PPS with equimolar ratio. The TEM analysis reveals nanoscale polydispersity (5nm to 70nm) and prevalence of mainly spherical morphological features in all the cases with occasional indications of triangular and hexagonal morphological features depending upon the reaction molar ratio.

}, keywords = {Ag, Ag2S, Nanoparticles, Polymer inorganic solid -state reaction, Thermoplastic polymer matrix}, issn = {1662-5250}, doi = {10.4028/www.scientific.net/JNanoR.5.143}, author = {Waghmare, Sujata and Shinde, Manish and Gholap, Ramkrishna S. and Rao, N. Koteswara and Hawaldar, Ranjit R. and Mulik, Uttam P. and Amalnerkar, Dinesh P.} } @article { ISI:000269291500035, title = {Nanocrystalline Mn-Zn-ferrite by novel oxalato-hydrazinated complex method}, journal = {Materials Chemistry and Physics}, volume = {117}, number = {1}, year = {2009}, month = {SEP}, pages = {187-191}, publisher = {ELSEVIER SCIENCE SA}, address = {PO BOX 564, 1001 LAUSANNE, SWITZERLAND}, abstract = {

We report here for the first time the synthesis of technologically important ferrite, using a metal oxalato-hydrazinate (MOH) complex method. The MOH complex of iron-manganese-zinc was synthesized at room temperature using the precursors, ferrous ammonium sulphate, manganese acetate and zinc acetate. Thermo-gravimetric studies of MOH intermediate showed complete phase formation of MnZnFe(2)O(4) at 280 degrees C. XRD data showed the formation of single phase cubic spinel MnZnFe(2)O(4). Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) demonstrate the spherical shape particle morphology. TEM images indicated the particle size of ferrite powder in the range of 20-36 nm. Magnetization of synthesized nano-sized Mn(0.69)Zn(.0.19)Fe(2.12)O(4) was observed coercive force (H(c)) at 127.82 Oe with a saturation magnetization (M(s)), 34.5 emu g(-1) using vibrating sample magnetometer (VSM) at room temperature. Mossbauer study of nano-sized ferrite powder showed super-paramagnteic behavior. (c) 2009 Elsevier B.V. All rights reserved.

}, keywords = {crystal structure, Magnetic materials, Mn-Zn-ferrite, Nanostructures, Optical properties}, issn = {0254-0584}, doi = {10.1016/j.matchemphys.2009.05.036}, author = {Kanade, K. G. and Amalnerkar, Dinesh P. and Potdar, H. S. and Kale, B. B.} } @article { ISI:000284238000028, title = {Rapid generation of hierarchical nanoarchitectures of CdS via facile microwave assisted hydrothermal/semi-solvothermal route}, journal = {International Journal of Nanotechnology}, volume = {7}, number = {9-12, SI}, year = {2010}, month = {DEC}, pages = {1120-1130}, publisher = {INDERSCIENCE ENTERPRISES LTD}, address = {WORLD TRADE CENTER BLDG, 29 ROUTE DE PRE-BOIS, CASE POSTALE 896, CH-1215 GENEVA, SWITZERLAND}, abstract = {

1-D nanorod bundles as well as sea urchin and starfish like hierarchical morphological nanoarchitectures of CdS have been synthesised using a facile microwave assisted hydrothermal/semi-solvothermal technique. Observation of interesting regular/irregular pine-tree like secondary growth over these hierarchical nanoarchitectures is an important aspect of this work. Cadmium acetate and thiourea were used as precursor materials and were dissolved in solution containing mixture of diethylene triamine (DETA) and deionised water (DIW) in different volume ratios prior to subjecting the resultant solution to microwave radiation of 300 W at a reaction time of 10 min and temperature of 140 degrees C. XRD revealed formation of hexagonal CdS with strong (002) preferred orientation (c-axis orientation). Morphology dependent optical properties are studied using room temperature photoluminescence spectroscopy. We feel such secondary growth will be highly favourable in determining the non-linear properties of optoelectronic devices fabricated using such novel hierarchical nanoarchitectures.

}, keywords = {CdS, hierarchical nanoarchitectures, Microwave, Nanorods, secondary growth, solvothermal synthesis}, issn = {1475-7435}, author = {Shinde, Manish D. and Pawar, Amol U. and Sreeja, V. and Rane, Sunit and Potdar, Hari S. 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 {46930, title = {Highly sensitive label-free bio-interfacial colorimetric sensor based on silk fibroin-gold nanocomposite for facile detection of chlorpyrifos pesticide}, journal = {Scientific Reports}, volume = {10}, year = {2020}, month = {MAR}, pages = {4198}, type = {Article}, abstract = {

Herein, the preparation of gold nanoparticles-silk fibroin (SF-AuNPs) dispersion and its label-free colorimetric detection of the organophosphate pesticide, namely chlorpyrifos, at ppb level are reported. The silk fibroin solution was extracted from B. mori silk after performing degumming, dissolving and dialysis steps. This fibroin solution was used for synthesis of gold nanoparticles in-situ without using any external reducing and capping agent. X-ray Diffractometry (XRD), Field Emission Transmission Electron Microscopy (FETEM) along with Surface Plasmon Resonance based optical evaluation confirmed generation of gold nanoparticles within SF matrix. The resultant SF-AuNPs dispersion exhibited rapid and excellent colorimetric pesticide sensing response even at 10 ppb concentration. Effect of additional parameters viz. pH, ionic concentration and interference from other pesticide samples was also studied. Notably, SF-AuNPs dispersion exhibited selective colorimetric pesticide sensing response which can be calibrated. Furthermore, this method was extended to various simulated real life samples such as tap water, soil and agricultural products including plant residues to successfully detect the presence of chlorpyrifos pesticide. The proposed colorimetric sensor system is facile yet effective and can be employed by novice rural population and expert researchers alike. It can be exploited as preliminary tool for label-free colorimetric chlorpyrifos pesticide sensing in water and agricultural products.

}, issn = {2045-2322}, doi = {10.1038/s41598-020-61130-y}, author = {Mane, Pramod C. and Shinde, Manish D. and Varma, Sanjana and Chaudhari, Bhushan P. and Fatehmulla, Amanullah and Shahabuddin, M. and Amalnerkar, Dinesh P. and Aldhafiri, Abdullah M. and Chaudhari, Ravindra D.} }