01469nas a2200181   4500008004100000022001400041245010100055210006900156260011000225300001200335490000600347520072300353100001901076700001801095700002501113700002401138856012501162       2012                        eng d  a2040-336400aEnhanced piezoresponse of electrospun PVDF mats with a touch of nickel chloride hexahydrate salt0 aEnhanced piezoresponse of electrospun PVDF mats with a touch of   aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcFEB  a752-7560 v43 a<p>PVDF nanofibers are prepared using electrospinning. The effect of addition of a hydrated salt, nickel chloride hexahydrate (NiCl2 center dot 6H(2)O), on the phase formation is examined. Addition of the hydrated salt (NC) is found to enhance the polar beta phase by about 30%. The peak to peak piezo-voltage generated for PVDF NC is almost 0.762 V, a factor of 3 higher than that for PVDF. The fiber mats exhibit a significantly enhanced dynamic strain sensor response. The voltage generated per unit micro-strain developed during the free vibration test for PVDF was 0.119 mV whereas it was 0.548 mV for PVDF NC, exhibiting a non-linearly enhanced performance vis a vis the increase in the beta phase component.</p>1 aDhakras, Dipti1 aBorkar, Vivek1 aOgale, Satishchandra1 aJog, Jyoti, Prakash  uhttps://library.ncl.res.in/content/enhanced-piezoresponse-electrospun-pvdf-mats-touch-nickel-chloride-hexahydrate-salt-002050nas a2200193   4500008004100000022001400041245011700055210006900172260011000241300001600351490000700367520124200374100001901616700001801635700002201653700002401675700002501699856013201724       2014                        eng d  a1463-907600aHigh performance all-organic flexural piezo-FET and nanogenerator via nanoscale soft-interface strain modulation0 aHigh performance allorganic flexural piezoFET and nanogenerator   aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcSEP  a22874-228810 v163 a<p>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.</p>1 aDhakras, Dipti1 aGawli, Yogesh1 aChhatre, Shraddha1 aWadgaonkar, Prakash1 aOgale, Satishchandra  uhttps://library.ncl.res.in/content/high-performance-all-organic-flexural-piezo-fet-and-nanogenerator-nanoscale-soft-interface-000795nas a2200205   4500008004100000245014100041210006900182260000800251300002200259490000600281100001800287700002000305700001900325700002000344700001900364700002800383700002100411700002500432856013200457       2016                        eng d00a3D Polyaniline architecture by concurrent inorganic and organic acid doping for superior and robust high rate supercapacitor performance0 a3D Polyaniline architecture by concurrent inorganic and organic   cFEB  aArticle No. 210020 v61 aGawli, Yogesh1 aBanerjee, Abhik1 aDhakras, Dipti1 aDeo, Meenal, S.1 aBulani, Dinesh1 aWadgaonkar, Prakash, P.1 aShelke, Manjusha1 aOgale, Satishchandra  uhttps://library.ncl.res.in/content/3d-polyaniline-architecture-concurrent-inorganic-and-organic-acid-doping-superior-and-robust01644nas a2200145   4500008004100000245014500041210006900186260000800255300002800263490000600291520102500297100001901322700002501341856013201366       2016                        eng d00aHigh-performance organic-inorganic hybrid piezo-nanogenerator via interface enhancedpolarization effects for self-powered electronic systems0 aHighperformance organicinorganic hybrid piezonanogenerator via i  cOCT  aArticle Number: 16004920 v33 aAn electrospun fi ber based wearable organic-inorganic hybrid piezonanogenerator compose of suitably engineered P(VDF-TrFE) and BaTiO3 nanostructures is reported. In the case of the device with an electrospun mat of piezoelectric beta-phase P(VDF-TrFE) and BaTiO3 nanoparticulates fi lled in the interfi ber open spaces, a power density of 16 mu W cm(-2) is realized at an applied impact of 0.02 MPa (which essentially corresponds to the thumb pressure). A similar device, with BaTiO 3 additionally embedded in the P(VDF-TrFE) fi bers during their formation, renders a signifi cantly higher peak power density of 28 mu W cm(-2) with instantaneous power density of approximate to 8.8 mu W cm(-2) at the same touch pressure. This performance is attributed to the high density of interfaces in such a device and the corresponding enhancement in the dielectric response. It is demonstrated that the power generated from such a hybrid device structure can be used for small scale applications such as charging a mobile phone.1 aDhakras, Dipti1 aOgale, Satishchandra  uhttps://library.ncl.res.in/content/high-performance-organic-inorganic-hybrid-piezo-nanogenerator-interface-enhancedpolarization