Presentation Title

A New Organometallic Material, Possibly Ferroelectric

Start Date

November 2016

End Date

November 2016

Location

HUB 302-#157

Type of Presentation

Poster

Abstract

We synthesized a new crystalline material that exhibits two distinct morphologies. Its production is inexpensive and does not require extreme temperature or pressure. In addition, this crystal has been predicted to possess ferroelectric properties and therefore it may be used as capacitors, piezo actuators, as well as have applications as data memory storages. We mix equal parts of: a one mole standard solution Cobalt (II) Chloride Hexahydrate (237.93g/L), Hydrochloric Acid (HCL), and Diisopropylamine (DIPA). Fast evaporation of the solution results in a needle like morphology, while slow evaporation results in a plate morphology. Powder x-ray diffraction shows no measurable difference of the crystal lattice structure of needles and plates. The new crystal, Diisopropylammonium Cobalt (II), was characterized by single crystal x-ray diffraction; the structure consists of 8[CoCl4] 2[HDIPA] units per unit cell and has the molecular formula Cl4 Co, 2(C6 H16 N). The crystal symmetry group is C 1 2 1, its unit cell dimensions are a = 28.3559(12) Å α= 90°. b = 12.1289(6) Å β= 118.2520(10) °. c = 13.5484(5) Å g = 90°. We measured the d33 value as 27.5 E -12 m/v. First principles calculations show the polarization to be -33 electrons-Angstrom along the y-axis, which is 28 degrees off the b-axis. These results suggest that this crystal may be ferroelectric with high probability to pass through polar phases due to its spacing. Further repeatable testing with Atomic Force Microscopy and bulk capacitive methods are needed to confirm ferroelectric and piezoelectric properties.

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Nov 12th, 4:00 PM Nov 12th, 5:00 PM

A New Organometallic Material, Possibly Ferroelectric

HUB 302-#157

We synthesized a new crystalline material that exhibits two distinct morphologies. Its production is inexpensive and does not require extreme temperature or pressure. In addition, this crystal has been predicted to possess ferroelectric properties and therefore it may be used as capacitors, piezo actuators, as well as have applications as data memory storages. We mix equal parts of: a one mole standard solution Cobalt (II) Chloride Hexahydrate (237.93g/L), Hydrochloric Acid (HCL), and Diisopropylamine (DIPA). Fast evaporation of the solution results in a needle like morphology, while slow evaporation results in a plate morphology. Powder x-ray diffraction shows no measurable difference of the crystal lattice structure of needles and plates. The new crystal, Diisopropylammonium Cobalt (II), was characterized by single crystal x-ray diffraction; the structure consists of 8[CoCl4] 2[HDIPA] units per unit cell and has the molecular formula Cl4 Co, 2(C6 H16 N). The crystal symmetry group is C 1 2 1, its unit cell dimensions are a = 28.3559(12) Å α= 90°. b = 12.1289(6) Å β= 118.2520(10) °. c = 13.5484(5) Å g = 90°. We measured the d33 value as 27.5 E -12 m/v. First principles calculations show the polarization to be -33 electrons-Angstrom along the y-axis, which is 28 degrees off the b-axis. These results suggest that this crystal may be ferroelectric with high probability to pass through polar phases due to its spacing. Further repeatable testing with Atomic Force Microscopy and bulk capacitive methods are needed to confirm ferroelectric and piezoelectric properties.