Studies from Institute of Engineering in the Area of Applied Physical Science Described (Charge carrier transport mechanisms in perovskite CdTiO3 fibers)
By a News Reporter-Staff News Editor at Physics Week -- Fresh data on Applied Physical Science are presented in a new report. According to news originating from Islamabad, Pakistan, by VerticalNews correspondents, research stated, "Electrical transport properties of electrospun cadmium titanate (CdTiO3) fibers have been investigated using ac and dc measurements. Air annealing of as spun fibers at 1000 degrees C yielded the single phase perovskite fibers having diameter similar to 600 nm - 800 nm."
Our news journalists obtained a quote from the research from the Institute of Engineering, "Both the ac and dc electrical measurements were carried out at temperatures from 200 K - 420 K. The complex impedance plane plots revealed a single semicircular arc which indicates the interfacial effect due to grain boundaries of fibers. The dielectric properties obey the Maxwell-Wagner theory of interfacial polarization. In dc transport study at low voltages, data show Ohmic like behavior followed by space charge limited current (SCLC) with traps at higher voltages at all temperatures (200 K - 420 K). Trap density in our fibers system is N-t = 6.27 x 10(17) /cm(3). Conduction mechanism in the sample is governed by 3-D variable range hopping (VRH) from 200 K - 300 K. The localized density of states were found to be N(E-F) = 5.51 x 10(21) eV(-1) cm(-3) at 2 V. Other VRH parameters such as hopping distance (Rhop) and hopping energy (Whop) were also calculated. In the high temperature range of 320 K - 420 K, conductivity follows the Arrhenius law. The activation energy found at 2 V is 0.10 eV."
According to the news editors, the research concluded: "Temperature dependent and higher values of dielectric constant make the perovskite CdTiO3 fibers efficient material for capacitive energy storage devices."
For more information on this research see: Charge carrier transport mechanisms in perovskite CdTiO3 fibers. AIP Advances, 2014;4(6):405-417. AIP Advances can be contacted at: Amer Inst Physics, Circulation & Fulfillment Div, 2 Huntington Quadrangle, Ste 1 N O 1, Melville, NY 11747-4501, USA. (American Institute of Physics - www.aip.org/; AIP Advances - aipadvances.aip.org/)
The news correspondents report that additional information may be obtained from Z. Imran, Pakistan Inst Engn & Appl Sci, Dept. of Met & Mat Engn, Micro & Nano Devices Grp, Islamabad 45650, Pakistan. Additional authors for this research include M.A. Rafiq and M.M. Hasan.
Keywords for this news article include: Asia, Pakistan, Islamabad, Applied Physical Science
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