Electrical and thermal transport properties of S- and Te-doped InSe alloys

Kim, Ji-Il; Kim, Hyun-Sik; Kim, Sang Il

doi:10.1088/1361-6463/ab1caa

Cited by 41 publications

(43 citation statements)

References 20 publications

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“…Polyaniline (PANI) was prepared using chemical oxidation method [34]. To start the reaction, 6 g of aniline monomer (ANI) was added to 100 ml of deionized water in flask containing a stirrer (located in ice bath).…”

Section: Preparation Of Polyanilinementioning

confidence: 99%

Investigating mechanical, dielectric, and electromagnetic interference shielding properties of polymer blends and three component hybrid composites based on polyvinyl alcohol, polyaniline, and few layer graphene

Khan

Saboor

et al. 2017

Polymer Composites

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To achieve the suitable set of synergistic mechanical, dielectric, and electromagnetic interference shielding properties, polymer blends based on varying the concentration of conductive polymer polyaniline (PANI) in insulative matrix of polyvinyl alcohol (PVA) as well as hybrid composites by adding few layer graphene (FLG) in PVA/PANI polymer blends are prepared using solution casting method. In PVA/PANI blends, by increasing the concentration of PANI, dielectric constant (ε′), dielectric loss (ε″), and total shielding efficiency (SET) of PVA are enhanced from 4 to 80, 0.72 to 164, and 2.5 to 30 dB at 100 Hz, respectively, at the considerable loss of its mechanical properties particularly the tensile strength from 23.9 to 8.5 MPa. For hybrid composites of PVA/PANI/FLG, mechanical as well as dielectric and EMI shielding properties are remarkably enhanced at very low loading levels of FLG. The incorporation of small amounts of FLG in PVA/PANI‐10 wt%, the ε′, ε″, and SET are increased from 4 to 7,907, 0.5 to 406,947.5 and 2.5 to 99 dB at 100 Hz, respectively, along with the considerable increase in the mechanical properties such as tensile strength from 15.7 to 36.3 MPa and modulus from 0.1 to 0.96 GPa at the loss of strain. In comparison to PVA/PANI blends, hybrid composites of PVA/PANI/FLG become a promising system for microwave absorption applications. POLYM. COMPOS., 39:3686–3695, 2018. © 2017 Society of Plastics Engineers

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Section: Preparation Of Polyanilinementioning

confidence: 99%

Investigating mechanical, dielectric, and electromagnetic interference shielding properties of polymer blends and three component hybrid composites based on polyvinyl alcohol, polyaniline, and few layer graphene

Khan

Saboor

et al. 2017

Polymer Composites

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“…However, a small amount of S doping in a Bi 2 (Te,Se) 3 n-type alloy would maintain its original crystal structure and would modify its electronic structure [9]. Typically, the E g values of the series of tellurides, selenides, and sulfides with identical cations increase with the size of the anion [10][11][12]. Therefore, the E g widening can be anticipated in S-doped Bi 2 (Te,Se) 3 alloys.…”

Section: Introductionmentioning

confidence: 99%

Reduced Bipolar Conduction in Bandgap-Engineered n-Type Cu0.008Bi2(Te,Se)3 by Sulfur Doping

Shin

Kim

et al. 2020

Energies

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Significant bipolar conduction of the carriers in Bi2Te3-based alloys occurs at high temperatures due to their narrow bandgaps. Therefore, at high temperatures, their Seebeck coefficients decrease, the bipolar thermal conductivities rapidly increase, and the thermoelectric figure of merit, zT, rapidly decreases. In this study, band modification of n-type Cu0.008Bi2(Te,Se)3 alloys by sulfur (S) doping, which could widen the bandgap, is investigated regarding carrier transport properties and bipolar thermal conductivity. The increase in bandgap by S doping is demonstrated by the Goldsmid–Sharp estimation. The bipolar conduction reduction is shown in the carrier transport characteristics and thermal conductivity. In addition, S doping induces an additional point-defect scattering of phonons, which decreases the lattice thermal conductivity. Thus, the total thermal conductivity of the S-doped sample is reduced. Despite the reduced power factor due to the unfavorable change in the conduction band, zT at high temperatures is increased by S doping with simultaneous reductions in bipolar and lattice thermal conductivity.

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“…Nanoporous electrodes have also been shown to reduce the overpotential required to oxidize many kinetically slow redox molecules. As a result, they have been used in electrochemical sensing, catalysis, and biomedical applications …”

Section: Introductionmentioning

confidence: 99%

Flexible Nanoporous Gold Electrodes for Electroanalysis in Complex Matrices

2019

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Flexible, three‐dimensional nanoporous gold (NPG) electrodes were fabricated on polydimethylsiloxane (PDMS) surfaces without any functionalization, and their electrochemical properties examined in the absence and presence of common biofouling agents using cyclic voltammetry and redox potentiometry. In this work, potassium ferricyanide and fibrinogen were used as a model redox probe and denaturing agent, respectively, to demonstrate that flexible NPG electrodes behave ideally and can make electrochemical measurements in biofouling solutions. Using cyclic voltammetry, the non‐faradaic capacitive current was shown to be directly proportional to the scan rate, while the redox chemistry of potassium ferricyanide in the presence and absence of fibrinogen demonstrated reversible voltammetry. Using redox potentiometry, Nernst plots for the potassium ferri‐/ferrocyanide redox system gave rise to an expected Nernstian slope of 60 mV. These flexible electrodes could be particularly beneficial in electrochemical sensing in complex environments. Proof of concept was demonstrated through the measurement of uric acid in red blood cell packets using cyclic voltammetry.

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Electrical and thermal transport properties of S- and Te-doped InSe alloys

Cited by 41 publications

References 20 publications

Investigating mechanical, dielectric, and electromagnetic interference shielding properties of polymer blends and three component hybrid composites based on polyvinyl alcohol, polyaniline, and few layer graphene

Investigating mechanical, dielectric, and electromagnetic interference shielding properties of polymer blends and three component hybrid composites based on polyvinyl alcohol, polyaniline, and few layer graphene

Reduced Bipolar Conduction in Bandgap-Engineered n-Type Cu0.008Bi2(Te,Se)3 by Sulfur Doping

Flexible Nanoporous Gold Electrodes for Electroanalysis in Complex Matrices

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