Development of Transition Metal Dichalcogenides (TMDCs) Field-Effect Transistors via Reconfigurable Ion Gating with BMIM-BF4 (1-butyl-3-methylimidazolium Tetrafluoroborate) | Chapter 3 | Current Innovations in Chemical and Materials Sciences Vol. 9

 

MoTe2 (molybdenum ditelluride) is a two-dimensional material that has gained significant interest in the field of electronics because of its unique electronic properties. 2H MoTe2 (molybdenum ditelluride) has generated significant interest because of its superconducting, nonvolatile memory, and semiconducting of new materials, and it has a large range of electrical properties. The combination of transition metal dichalcogenides (TMDCs) and two-dimensional (2D) materials like hexagonal boron nitride (h-BN) in lateral heterostructures offers a unique platform for designing and engineering novel electronic devices. We report the fabrication of highly conductive interfaces in crystalline ionic liquid-gated (ILG) field-effect transistors (FETs) consisting of a few layers of MoTe2/h-BN heterojunctions. An optical microscope was used to characterize the structural morphology and three-dimensional schematics of the transistor, including the thickness of the MoTe2 and h-BN thin films. In our initial exploration of tellurium-based semiconducting TMDs, we directed our attention to MoTe2 crystals with thicknesses exceeding 12 nm. Our primary focus centered on investigating the transport characteristics and quantitatively assessing the surface interface heterostructure. Our transconductance (gm) measurements indicate that the very efficient carrier modulation with an ILG FET is two times larger than standard back gating, and it demonstrates the unipolarity of the device. The ILG FET exhibited highly unipolar p-type behavior with a high on/off ratio, and it significantly increased the mobility in MoTe2/h-BN hetero-channels, achieving improvement as one of the highest recorded mobility increments. Specifically, we observed hole and electron mobility values ranging from 345 cm2 V−1 s−1 to 285 cm2 V−1 s−1 at 80 K. We predict that our ability to observe the intrinsic, heterointerface conduction in the channels was due to a drastic reduction of the Schottky barriers, and electrostatic gating is suggested as a method for controlling the phase transitions in the few layers of TMDC FETs. Moreover, the simultaneous structural phase transitions throughout the sample, achieved through electrostatic doping control, present new opportunities for developing phase change devices using atomically thin membranes.

Author(s) Details:

Kamoladdin Saidov,
Department of Electronics and Radio Engineering, Tashkent University of Information Technologies, Tashkent 100200, Uzbekistan and Department of Information Technologies, Tashkent International University of Education, Tashkent 100207, Uzbekistan.

Gurdial Blugan
Laboratory for High Performance Ceramics, Empa, Swiss Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland.

 

Olim Ruzimuradov
Department of Natural and Mathematic Sciences, Turin Polytechnic University in Tashkent, Tashkent 100095, Uzbekistan.

Please see the link here: https://stm.bookpi.org/CICMS-V9/article/view/14334

Investigating the Novel Hydrogen-Bonded Charge Transfer Complex between Chloranilic Acid and 2-Amino-4, 6-Dimethylpyridine: Spectroscopic Characterization, Molecular Modeling and DFT/TD-DFT/PCM Calculations | Chapter 3 | Recent Developments in Chemistry and Biochemistry Research Vol. 1

Spectroscopic analysis, molecular modelling, and DFT/TD-DFT/PCM calculations of a novel hydrogen-bonded charge transfer complex formed by chloranilic acid and 2-amino-4, 6-dimethylpyridine. A charge transfer hydrogen-bonded complex between the electron donor (proton acceptor) 2-amino-4,6-dimethylpyridine and the electron acceptor (proton donor) chloranilic acid was synthesised and explored experimentally and theoretically. The stability constant showed high values, indicating that the produced compound was highly stable. The stoichiometric ratio for chloroform, ethanol, methanol, and acetonitrile was found to be 1:1. The solid compound was created and characterised using various spectroscopic techniques. FTIR, 1H, and 13C NMR experiments confirmed the presence of proton and charge transfers in the produced complex. In addition to experimental data, molecular modelling using density functional theory (DFT) was performed in gas, chloroform, and methanol phases to account for charge and hydrogen transfers. Overall, experimental and theoretical computations were consistent.

Author(s) Details:

Khairia M. Al-Ahmary,
Department of Chemistry, College of Science, University of Jeddah, Jeddah, Saudi Arabia.

Fatimah A. Alshehri,
Department of Chemistry, College of Science, University of Jeddah, Jeddah, Saudi Arabia and Department of Chemistry, Faculty of Science and Arts, University of Bisha, Alnamas, Saudi Arabia.

Faten M. Atlam,
Theoretical Applied Chemistry Unit (TACU), Chemistry Department, Faculty of Science, Tanta University, Tanta, Egypt.

Mohamed K. Awad,
Theoretical Applied Chemistry Unit (TACU), Chemistry Department, Faculty of Science, Tanta University, Tanta, Egypt.

Please see the link here: https://stm.bookpi.org/RDCBR-V1/article/view/13610

The Use of Spectrophotometric and Thermodynamic Methods for the Determination of Glibenclamide | Chapter 8 | Current Research and Development in Chemistry Vol. 4

 

For the assay of glibenclamide, a spectrophotometric and thermodynamic method is defined. The technique involves a glibenclamide charge transfer complexion reaction with 2,3-Dichloro-5,6-Dicyano-1,4-benzoquinone (DDQ) to form a very intense coloured charge transfer complex with a 1:1 stoichiometric ratio. Under tailored experimental conditions, the resulting coloured product was analysed at 474 nm. Beer-Lambert 's law was obeyed over the 20-100 μg / ml concentration range. The apparent absorptivity of the molar was measured and 0.99 ⁇ 103 L.mol- 1 cm-1 was found. The corresponding sensitivity of Sandell, detection limits, and quantification were stated. The thermodynamic parameters have been defined as well. The proposed method was applied successfully to the determination of glibenclamide in pure and commercial forms with strong average recovery of 98.24 percent. The student t-test and f-test were used for statistical comparison at a 95 percent confidence level.

Author (s) Details

Nwanisobi Gloria
Department of Pure and Industrial Chemistry, Faculty of Physical Sciences, Nnamdi Azikiwe University, Awka, Nigeria.

Ukoha Pius
Department of Pure and Industrial Chemistry, Faculty of Physical Sciences, University of Nigeria, Nsukka, Nigeria.

View Book :- https://bp.bookpi.org/index.php/bpi/catalog/book/282