scholarly journals A Study of two Dimensional Metal Carbide MXene Ti3C2 Synthesis, characterization conductivity and radiation properties

2019 ◽  
Vol 56 (3) ◽  
pp. 635-640
Author(s):  
Zarrul Azwan Mohd Rasid ◽  
Mohd Firdaus Omar ◽  
Muhammad Firdaus Mohd Nazeri ◽  
Syahrul Affandi Saidi ◽  
Andrei Victor Sandu ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Environmental Protection Agency ◽  
Max Phase ◽  
Two Dimensional ◽  
Metal Carbide ◽  
Data Logger ◽  
Sem Images ◽  
Radiation Level ◽  
New Family ◽  
Radiation Properties

Since the discovery of exceptional properties of graphene, a lot of researchers focused on the discovery of another nobel two-dimensional (2D) materials. Recently, an elegant exfoliation approaches was proposed as a method to synthesis a new family of transitional 2D metal carbide or nitrades of MXene from a layered MAX phase. A layered MAX phase of Ti3AlC2 was synthesized through pressureless sintering (PLS) the initial powder of 3TiH2/1.1Al/2C without preliminary dehydrogenation under argon atmosphere at 1350 oC. An elegant exfoliation approach was used to eliminates Al from its precursor to form a layered-structure of Ti3C2. In this study, thermal conductivity of MAX phase and MXene were studied using absolute axial heat flow method to measure the abilities sample to conduct heat and the data was collected using Picolog 1216 Data Logger. Electrical conductivity of these two materials was also compared by using two-point probe, due to its simplicity. Radiation properties of 2D MXene Ti3C2 was studied by using an established radon monitor, placed in closed, fabricated container. Morphological and structural properties of this 2D material were also studied using an established FESEM and XRD apparatus. SEM images shows two types of morphology which is a layer of Ti3C2 and the agglomerates Al2O3 with graphite. XRD pattern reveals three phases in this material which is a rhombohedral Al2O3, rhombohedral graphite and rhombohedral Ti3C2 phases, respectively. Thermal and electrical conductivity of MXene were proven higher than MAX phase. Radon concentration for this material for five consecutive days explains the radiation level of this material which is under the suggestion value from US Environmental Protection Agency (EPA). From this finding, it is can conveniently say that the MXene material can be promising material for electronic application.

Study of Mxene: Characterization and Radiation Properties of Two-Dimensional Titanium Carbide

2018 ◽  
Vol 280 ◽  
pp. 31-35
Author(s):  
Mohd Firdaus Omar ◽  
Zarrul Azwan Mohd Rasid ◽  
M.A. Abdul A’ziz ◽  
Muhammad Firdaus Mohd Nazeri ◽  
S.A. Saidi
Keyword(s):  
Titanium Carbide ◽  
Environmental Protection Agency ◽  
Radon Concentration ◽  
Max Phase ◽  
Protection Agency ◽  
Sem Images ◽  
Radiation Level ◽  
Xrd Pattern ◽  
Radiation Properties ◽  
Radon Monitor

In this study, radon concentration of 2D Titanium Carbide MXene Ti3C2 was studied by using an established radon monitor. A layered MAX phase of Ti3AlC2 was synthesized through pressureless sintering (PLS) the initial powder of TiH2/Al/C without preliminary dehydrogenation under argon atmosphere at 1350 °C. An elegant exfoliation approach was used to eliminates Al from its precursor to form a layered-structure of Ti3C2. Morphological and structural properties of this 2D material also studied. SEM images shows two types of morphology which is a layer of Ti3C2 and the agglomerates Al2O3 with graphite. XRD pattern reveals three phases in this material which is a rhombohedral Al2O3, rhombohedral graphite and rhombohedral Ti3C2 phases. Radon concentration for this material for five consecutive days explains the radiation level of this material is under the suggestion value from US Environmental Protection Agency (EPA).

scholarly journals Modified MAX Phase Synthesis for Environmentally Stable and Highly Conductive Ti3C2 MXene

2020 ◽  
Author(s):  
Tyler Mathis ◽  
Kathleen Maleski ◽  
Adam Goad ◽  
Asia Sarycheva ◽  
Mark Anayee ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Shelf Life ◽  
Max Phase ◽  
Two Dimensional ◽  
Ambient Conditions ◽  
Phase Synthesis ◽  
Commercial Use ◽  
Aqueous Suspensions ◽  
Resistance To Oxidation ◽  
Phase Precursor

One of the primary factors limiting further research and the commercial use of the two-dimensional (2D) MXene titanium carbide (Ti3C2), as well as MXenes in general, is the rate at which freshly made samples oxidize and degrade when stored as aqueous suspensions. Here, we show that including excess aluminum during synthesis of the Ti3AlC2 MAX phase precursor leads to the creation of Ti3AlC2 grains with improved stoichiometry and crystallinity. Ti3C2 nanosheets produced from the improved Ti3AlC2 are of higher quality, as evidenced by their increased resistance to oxidation and an increase in their electrical conductivity to 20,000 S/cm. Our results indicate that defects created during the synthesis of Ti3C2 (and by inference, other MXenes) lead to the previously observed instability. We show that by eliminating those defects results in Ti3C2 that is highly stable in aqueous solutions and in air. Aqueous suspensions of single- to few-layer Ti3C2 flakes produced from the modified Ti3AlC2 have a shelf life of over ten months, compared to one to two weeks for Ti3C2 produced from conventional Ti3AlC2, even when stored in ambient conditions. Freestanding films made from Ti3C2 suspensions stored for ten months show minimal decreases in electrical conductivity and negligible oxidation. Oxidation of the improved Ti3C2 in air initiates at temperatures that are 100-150°C higher than conventional Ti3C2. The observed improvements in both the shelf life and properties of Ti3C2 will facilitate the widespread use of this material. <br>

3D bioprinting of cell-laden electroconductive MXene nanocomposite bioinks

Nanoscale ◽  
2020 ◽  
Vol 12 (30) ◽  
pp. 16069-16080 ◽  
Author(s):  
Hadi Rastin ◽  
Bingyang Zhang ◽  
Arash Mazinani ◽  
Kamrul Hassan ◽  
Jingxiu Bi ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Transition Metal ◽  
Specific Surface ◽  
3D Bioprinting ◽  
Two Dimensional ◽  
Large Specific Surface Area ◽  
Metal Carbides ◽  
High Electrical Conductivity ◽  
Transition Metal Carbides ◽  
New Family

MXenes, a new family of two-dimensional transition metal carbides/nitrides, have been exploited in 3D bioprinting owing to their outstanding properties such as a large specific surface area, high electrical conductivity, and biodegradability.

scholarly journals Modified MAX Phase Synthesis for Environmentally Stable and Highly Conductive Ti3C2 MXene

2020 ◽  
Author(s):  
Tyler Mathis ◽  
Kathleen Maleski ◽  
Adam Goad ◽  
Asia Sarycheva ◽  
Mark Anayee ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Shelf Life ◽  
Max Phase ◽  
Two Dimensional ◽  
Ambient Conditions ◽  
Phase Synthesis ◽  
Commercial Use ◽  
Aqueous Suspensions ◽  
Resistance To Oxidation ◽  
Phase Precursor

One of the primary factors limiting further research and the commercial use of the two-dimensional (2D) MXene titanium carbide (Ti3C2), as well as MXenes in general, is the rate at which freshly made samples oxidize and degrade when stored as aqueous suspensions. Here, we show that including excess aluminum during synthesis of the Ti3AlC2 MAX phase precursor leads to the creation of Ti3AlC2 grains with improved stoichiometry and crystallinity. Ti3C2 nanosheets produced from the improved Ti3AlC2 are of higher quality, as evidenced by their increased resistance to oxidation and an increase in their electrical conductivity to 20,000 S/cm. Our results indicate that defects created during the synthesis of Ti3C2 (and by inference, other MXenes) lead to the previously observed instability. We show that by eliminating those defects results in Ti3C2 that is highly stable in aqueous solutions and in air. Aqueous suspensions of single- to few-layer Ti3C2 flakes produced from the modified Ti3AlC2 have a shelf life of over ten months, compared to one to two weeks for Ti3C2 produced from conventional Ti3AlC2, even when stored in ambient conditions. Freestanding films made from Ti3C2 suspensions stored for ten months show minimal decreases in electrical conductivity and negligible oxidation. Oxidation of the improved Ti3C2 in air initiates at temperatures that are 100-150°C higher than conventional Ti3C2. The observed improvements in both the shelf life and properties of Ti3C2 will facilitate the widespread use of this material. <br>

Co-planar two-dimensional Metal-Insulator-Semiconductor Capacitor: Numerical study of the device electrostatics.

2017 ◽  
Author(s):  
Varun Bheemireddy
Keyword(s):  
Space Charge ◽  
High Performance ◽  
Numerical Study ◽  
2D Materials ◽  
Space Charge Density ◽  
Two Dimensional ◽  
Short Channel ◽  
Metal Insulator ◽  
Metal Insulator Semiconductor ◽  
New Family

The two-dimensional(2D) materials are highly promising candidates to realise elegant and e cient transistor. In the present letter, we conjecture a novel co-planar metal-insulator-semiconductor(MIS) device(capacitor) completely based on lateral 2D materials architecture and perform numerical study of the capacitor with a particular emphasis on its di erences with the conventional 3D MIS electrostatics. The space-charge density features a long charge-tail extending into the bulk of the semiconductor as opposed to the rapid decay in 3D capacitor. Equivalently, total space-charge and semiconductor capacitance densities are atleast an order of magnitude more in 2D semiconductor. In contrast to the bulk capacitor, expansion of maximum depletion width in 2D semiconductor is observed with increasing doping concentration due to lower electrostatic screening. The heuristic approach of performance analysis(2D vs 3D) for digital-logic transistor suggest higher ON-OFF current ratio in the long-channel limit even without third dimension and considerable room to maximise the performance of short-channel transistor. The present results could potentially trigger the exploration of new family of co-planar at transistors that could play a signi significant role in the future low-power and/or high performance electronics.<br>

scholarly journals Solvothermal Preparation of Spherical Bi2O3 Nanoparticles Uniformly Distributed on Ti3C2Tx for Enhanced Capacitive Performance

2021 ◽  
Author(s):  
Tao Li ◽  
Xuefeng Chang ◽  
Lifang Mei ◽  
Xiayun Shu ◽  
Jidong Ma ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Chemical Stability ◽  
Layered Structure ◽  
Layered Material ◽  
Two Dimensional ◽  
Capacitive Performance ◽  
Solvothermal Preparation

Ti3C2Tx is a promising new two-dimensional layered material for supercapacitors with good electrical conductivity and chemical stability. However, Ti3C2Tx has problems such as collapse of the layered structure and low...

scholarly journals Effect of dispersity of particle length on electrical conductivity of two-dimensional systems

2019 ◽  
Vol 1163 ◽  
pp. 012006
Author(s):  
Yuri Yu Tarasevich ◽  
Andrei V Eserkepov ◽  
Irina V Vodolazskaya ◽  
Petr G Selin ◽  
Valentina V Chirkova ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Two Dimensional ◽  
Particle Length

scholarly journals Electrical conductivity in a non-covalent two-dimensional porous organic material with high crystallinity

2021 ◽  
Author(s):  
Qizhi Xu ◽  
Boyuan Zhang ◽  
Yihang Zeng ◽  
Amirali Zangiabadi ◽  
Hongwei Ni ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Organic Material ◽  
Field Effect ◽  
Field Effect Transistor ◽  
Van Der Waals Interactions ◽  
Two Dimensional ◽  
Porous Films ◽  
Top Down ◽  
High Crystallinity ◽  
Effect Transistor

Ultrathin porous films held together by non-covalent van der Waals interactions was obtained by a top-down approach, which is then utilized as channel material in a two-dimensional planar field-effect transistor device through easy stamp transfer.

A New Family of Plasma Excitations in a Partially Gated Two-Dimensional Electron System

2021 ◽  
Vol 85 (2) ◽  
pp. 113-117
Author(s):  
A. M. Zarezin ◽  
P. A. Gusikhin ◽  
V. M. Muravev ◽  
S. I. Gubarev ◽  
I. V. Kukushkin
Keyword(s):  
Electron System ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
New Family ◽  
Dimensional Electron System

scholarly journals Molecular Scaffold Growth of Two-Dimensional, Strong Interlayer-Bonding-Layered Materials

CCS Chemistry ◽  
2019 ◽  
pp. 117-127 ◽  
Author(s):  
Mengqi Zeng ◽  
Yunxu Chen ◽  
Enze Zhang ◽  
Jiaxu Li ◽  
Rafael G. Mendes ◽  
...  
Keyword(s):  
2D Materials ◽  
Layered Materials ◽  
Max Phase ◽  
Future Application ◽  
Two Dimensional ◽  
Max Phases ◽  
Molecular Scaffold ◽  
Fundamental Properties ◽  
Synthesis Strategy ◽  
Interlayer Bonding

Currently, most two-dimensional (2D) materials that are of interest to emergent applications have focused on van der Waals–layered materials (VLMs) because of the ease with which the layers can be separated (e.g., graphene). Strong interlayer-bonding-layered materials (SLMs) in general have not been thoroughly explored, and one of the most critical present issues is the huge challenge of their preparation, although their physicochemical property transformation should be richer than VLMs and deserves greater attention. MAX phases are a classical kind of SLM. However, limited to the strong interlayer bonding, their corresponding 2D counterparts have never been obtained, nor has there been investigation of their fundamental properties in the 2D limitation. Here, the authors develop a controllable bottom-up synthesis strategy for obtaining 2D SLMs single crystal through the design of a molecular scaffold with Mo 2GaC, which is a typical kind of MAX phase, as an example. The superconducting transitions of Mo 2GaC at the 2D limit are clearly inherited from the bulk, which is consistent with Berezinskii–Kosterlitz–Thouless behavior. The authors believe that their molecular scaffold strategy will allow the fabrication of other high-quality 2D SLMs single crystals, which will further expand the family of 2D materials and promote their future application.

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