02012nas a2200277   4500008004100000022001400041245012400055210006900179260000900248490000700257520104800264653002001312653002201332653001401354653002201368653001501390100002701405700001901432700002501451700002401476700001801500700002301518700003101541700003001572856013201602       2023                        eng d  a1433-785100a Ferroelectric aminophosphonium cyanoferrate with a large electrostrictive coefficient as a piezoelectric nanogenerator0 aFerroelectric aminophosphonium cyanoferrate with a large electro  cJAN 0 v623 a<p>
	Hybrid materials possessing piezo- and ferroelectric properties emerge as excellent alternatives to conventional piezoceramics due to their merits of facile synthesis, lightweight nature, ease of fabrication and mechanical flexibility. Inspired by the structural stability of aminophosphonium compounds, here we report the first A(3)BX(6) type cyanometallate [Ph-2((PrNH)-Pr-i)(2)P](3)[Fe(CN)(6)] (1), which shows a ferroelectric saturation polarization (P-s) of 3.71 mu C cm(-2). Compound 1 exhibits a high electrostrictive coefficient (Q(33)) of 0.73 m(4) C-2, far exceeding those of piezoceramics (0.034-0.096 m(4) C-2). Piezoresponse force microscopy (PFM) analysis demonstrates the polarization switching and domain structure of 1 further confirming its ferroelectric nature. Furthermore, thermoplastic polyurethane (TPU) polymer composite films of 1 were prepared and employed as piezoelectric nanogenerators. Notably, the 15 wt % 1-TPU device gave a maximum output voltage of 13.57 V and a power density of 6.03 mu W cm(-2).</p>
10aCyanometallates10aenergy conversion10aH-bonding10ahybrid composites10aPhosphorus1 aVijayakanth, Thangavel1 aSahoo, Supriya1 aKothavade, Premkumar1 aSharma, Vijay, Bhan1 aKabra, Dinesh1 aZareba, Jan, K. K.1 aShanmuganathan, Kadhiravan1 aBoomishankar, Ramamoorthy  uhttps://library.ncl.res.in/content/ferroelectric-aminophosphonium-cyanoferrate-large-electrostrictive-coefficient-piezoelectric02643nas a2200313   4500008004100000022001400041245012700055210006900182260000800251300001600259490000700275520158000282653001601862653001501878653002201893653002101915653002101936100001901957700002301976700002501999700002402024700003002048700002302078700002002101700001802121700003102139700003002170856012902200       2024                        eng d  a1944-824400aHighly electrostrictive salt cocrystal and the piezoelectric nanogenerator application of its 3D-printed polymer composite0 aHighly electrostrictive salt cocrystal and the piezoelectric nan  cMAY  a26406-264160 v163 a<p>
	Ionic cocrystals with hydrogen bonding can form exciting materials with enhanced optical and electronic properties. We present a highly moisture-stable ammonium salt cocrystal [CH3C6H4CH(CH3)NH2][CH3C6H4CH(CH3)NH3][PF6] ((p-TEA)(p-TEAH)PF6) crystallizing in the polar monoclinic C2 space group. The asymmetry in (p-TEA)(p-TEAH)PF6 was induced by its chiral substituents, while the polar order and structural stability were achieved by using the octahedral PF6- anion and the consequent formation of salt cocrystal. The ferroelectric properties of (p-TEA)(p-TEAH)PF6 were confirmed through P-E loop measurements. Piezoresponse force microscopy (PFM) enabled the visualization of its domain structure with characteristic ``butterfly'' and hysteresis loops associated with ferro- and piezoelectric properties. Notably, (p-TEA)(p-TEAH)PF6 exhibits a large electrostrictive coefficient (Q(33)) value of 2.02 m(4) C-2, higher than those found for ceramic-based materials and comparable to that of polyvinylidene difluoride. Furthermore, the composite films of (p-TEA)(p-TEAH)PF6 with polycaprolactone (PCL) polymer and its gyroid-shaped 3D-printed composite scaled-up device, 3DP-Gy, were prepared and evaluated for piezoelectric energy-harvesting functionality. A high output voltage of 22.8 V and a power density of 118.5 mu W cm(-3) have been recorded for the 3DP-Gy device. Remarkably, no loss in voltage outputs was observed for the (p-TEA)(p-TEAH)PF6 devices even after exposure to 99% relative humidity, showcasing their utility under extremely humid conditions.</p>
10a3D printing10acocrystals10aenergy harvesting10aferroelectricity10aPiezoelectricity1 aSahoo, Supriya1 aPanday, Rishukumar1 aKothavade, Premkumar1 aSharma, Vijay, Bhan1 aSowmiyanarayanan, Anirudh1 aPraveenkumar, Balu1 aZareba, Jan, K.1 aKabra, Dinesh1 aShanmuganathan, Kadhiravan1 aBoomishankar, Ramamoorthy  uhttps://library.ncl.res.in/content/highly-electrostrictive-salt-cocrystal-and-piezoelectric-nanogenerator-application-its-3d