@article { ISI:000340703000039, title = {CH3NH3PbI(3-x)(BF4)(x): molecular ion substituted hybrid perovskite}, journal = {Chemical Communications}, volume = {50}, number = {68}, year = {2014}, month = {SEP}, pages = {9741-9744}, publisher = {ROYAL SOC CHEMISTRY}, type = {Article}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

A molecular ion (BF4-) substituted hybrid perovskite CH3NH3PbI(3-x)(BF4)(x) is synthesized. The substituted perovskite shows significant enhancement in electrical conductivity at low frequencies and improved photoresponse under AM1.5 illumination as compared to the perovskite (CH3NH3PbI3).

}, issn = {1359-7345}, doi = {10.1039/C4CC04537H}, author = {Nagane, Satyawan and Bansode, Umesh P. and Game, Onkar S. and Chhatre, Shraddha and Ogale, Satishchandra} } @article { ISI:000342766500050, title = {High performance all-organic flexural piezo-FET and nanogenerator via nanoscale soft-interface strain modulation}, journal = {Physical Chemistry Chemical Physics}, volume = {16}, number = {41}, year = {2014}, month = {SEP}, pages = {22874-22881}, publisher = {ROYAL SOC CHEMISTRY}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

Flexural strain fields are encountered in a wide variety of situations and invite novel device designs for their effective use in sensing, actuating, as well as energy harvesting (nanogenerator) applications. In this work we demonstrate an interesting all-organic device design comprising an electrospun P(VDF-TrFE) fiber-mat built directly on a conducting PANI film, which is also grown on a flexible PET substrate, for flexural piezo-FET and nanogenerator applications. Orders of magnitude stronger modulation of electrical transport in PANI film is realized in this device as compared to the case of a similar device but with a uniform spin-coated P(VDF-TrFE) film. We find that in the flexural mode of operation, the interaction between the laterally modulated nanoscale strain field distributions created by the fibers and the applied coherent strain field strongly influences the carrier transport in PANI. The transport modulation is suggested to occur due to strain-induced conformational changes in P(VDF-TrFE) leading to changes in carrier localization-delocalization. We further show that the fiber-mat based device system also works as an efficient nanogenerator capable of delivering power for low power applications.

}, issn = {1463-9076}, doi = {10.1039/c4cp02155j}, author = {Dhakras, Dipti and Gawli, Yogesh and Chhatre, Shraddha and Wadgaonkar, Prakash and Ogale, Satishchandra} } @article {42996, title = {High surface area porous carbon for ultracapacitor application by pyrolysis of polystyrene containing pendant carboxylic acid groups prepared via click chemistry}, journal = {Materials Today Communications}, volume = {4}, year = {2015}, month = {SEP}, pages = {166-175}, doi = {10.1016/j.mtcomm.2015.07.002}, author = {Chhatre, Shraddha and Aravindan, Vanchiappan and Puthusseri, Dhanya and Banerjee, Abhik and Madhavi, Srinivasan and Wadgaonkar, Prakash P. and Ogale, Satishchandra B.} } @article {44548, title = {Phenazine-containing poly(phenylenevinylene): a new polymer with impressive field emission properties}, journal = {Journal of Polymer Research}, volume = {25}, year = {2018}, month = {FEB}, pages = {Article Number: 61}, abstract = {

Phenazine-containing poly(phenylenevinylene) (P(PHN-PV)) was synthesized using Wittig-Horner polycondensation of the appropriately designed monomers viz. 5,10-dioctyl-5,10-dihydrophenazine-2,7-dicarbaldehyde and tetraethyl ((2,5-bis((2-ethylhexyl) oxy)-1,4 phenylene) bis(methylene)) bis(phosphonate). The design embraces the specific motivation of incorporating the nitrogen-containing heterocycle viz. .phenazine in poly(phenylenevinylene) backbone. P(PHN-PV) exhibited reversible redox properties. In the field emission measurements performed on the film of P(F{\textquoteright}HN-PV), the turn-on field was observed to be 1.93 V/mu m for the current density of 10 mu A/cm(2). The maximum current density of similar to 4.87 mA/cm(2) was achieved at the applied field of 3.84 V/mu m. The emission current showed impressive stability for 6 h at a constant current of 1 mu A (current density of about 20 mu A/cm(2)). These results emphasize the role of phenazine heterocycle with lone pair of electrons on nitrogen in lowering the oxidation onset and in turn reduction of the turn-on voltage.

}, keywords = {field emission, Phenazine, Poly(phenylenevinylene)}, issn = {1022-9760}, doi = {10.1007/s10965-017-1428-8}, author = {Chhatre, Shraddha and Ichake, Amol and Harpale, Kashmira and Patil, Sumati and Deshpande, Aparna and More, Mahendra and Wadgaonkar, Prakash P.} } @article {48373, title = {Biological macromolecule chitosan grafted co-polymeric composite: bio-adsorption probe on cationic dyes}, journal = {Polymer Bulletin}, volume = {79}, year = {2022}, month = {NOV}, pages = {9441-9455}, type = {Article}, abstract = {

Chitosan biological macromolecule is a versatile polymer; chemical modification has been carried out that lead to the formation of chitosan grafted polymers composites (Chito-g-PC). We proposed synthesis of six various Chito-g-PC as sorbents for toxic dyes. A novel graft copolymerization method based on radical polymerization with vinyl monomer like acrylic acid, acrylamide, N-isopropylacrylamide, methacrylic acid and polyacrylonitrile were utilized in order to address the large amount of swelling at four different pH buffers solution. The effect of initiator and monomer concentration, time and temperature on \% grafting and \% grafting efficiency were performed. Comparative characterization of Chito and Chito-g-PC were evaluated by SEM, XRD and FTIR, as well as solubility characteristics of the composites were determined by various pH buffer solution. Cationic toxic dyes Malachite green (MG) and Methylene blue (MB) were selected as the sorbet, and Chito-g-PC were used as biosorbents. Thermodynamic analysis showed that the sorption process was spontaneous and endothermic with an increased randomness. The sorption experiments were realized with six different Chito-g-PC for MG and MB at various pH.

}, keywords = {Acrylamide, acrylic acid, Bio sorbent, Chitosan biological macromolecule}, issn = {0170-0839}, doi = {10.1007/s00289-021-03954-w}, author = {Khairkar, Shyam R. and Pansare, V. Shubham and Shedge, Amol A. and Chhatre, Shraddha and Kulal, Dnyaneshwar K. and Patil, Vishwanath R. and Pansare, V. Amol} }