scholarly journals Wafer-Scale and Full-Coverage Two-Dimensional Molecular Monolayers Strained by Solvent Surface Tension Balance

2021 ◽  
Author(s):  
Baichuan Jiang ◽  
Yu Che ◽  
Yurong Chen ◽  
Yingxuan Zhao ◽  
Can Wang ◽  
...  
Keyword(s):  
Surface Tension ◽  
Two Dimensional ◽  
Wafer Scale ◽  
Full Coverage ◽  
Molecular Monolayers

scholarly journals Nonlinear two-dimensional free surface solutions of flow exiting a pipe and impacting a wedge

2021 ◽  
Vol 126 (1) ◽  
Author(s):  
Alex Doak ◽  
Jean-Marc Vanden-Broeck
Keyword(s):  
Surface Tension ◽  
Integral Equation ◽  
Free Surface ◽  
Boundary Integral ◽  
Boundary Integral Method ◽  
Two Dimensional ◽  
Numerical Schemes ◽  
Additional Advantage ◽  
Infinite Wedge ◽  
Good Agreement

AbstractThis paper concerns the flow of fluid exiting a two-dimensional pipe and impacting an infinite wedge. Where the flow leaves the pipe there is a free surface between the fluid and a passive gas. The model is a generalisation of both plane bubbles and flow impacting a flat plate. In the absence of gravity and surface tension, an exact free streamline solution is derived. We also construct two numerical schemes to compute solutions with the inclusion of surface tension and gravity. The first method involves mapping the flow to the lower half-plane, where an integral equation concerning only boundary values is derived. This integral equation is solved numerically. The second method involves conformally mapping the flow domain onto a unit disc in the s-plane. The unknowns are then expressed as a power series in s. The series is truncated, and the coefficients are solved numerically. The boundary integral method has the additional advantage that it allows for solutions with waves in the far-field, as discussed later. Good agreement between the two numerical methods and the exact free streamline solution provides a check on the numerical schemes.

scholarly journals Waterproof molecular monolayers stabilize 2D materials

2019 ◽  
Vol 116 (42) ◽  
pp. 20844-20849 ◽  
Author(s):  
Cong Su ◽  
Zongyou Yin ◽  
Qing-Bo Yan ◽  
Zegao Wang ◽  
Hongtao Lin ◽  
...  
Keyword(s):  
Transition Metal ◽  
Theoretical Analysis ◽  
2D Materials ◽  
Transition Metal Dichalcogenides ◽  
Water Molecules ◽  
Two Dimensional ◽  
Ambient Conditions ◽  
Molecular Monolayers ◽  
Metal Dichalcogenides ◽  
Van Der Waals Materials

Two-dimensional van der Waals materials have rich and unique functional properties, but many are susceptible to corrosion under ambient conditions. Here we show that linear alkylamines n-CmH2m+1NH2, with m = 4 through 11, are highly effective in protecting the optoelectronic properties of these materials, such as black phosphorus (BP) and transition-metal dichalcogenides (TMDs: WS2, 1T′-MoTe2, WTe2, WSe2, TaS2, and NbSe2). As a representative example, n-hexylamine (m = 6) can be applied in the form of thin molecular monolayers on BP flakes with less than 2-nm thickness and can prolong BP’s lifetime from a few hours to several weeks and even months in ambient environments. Characterizations combined with our theoretical analysis show that the thin monolayers selectively sift out water molecules, forming a drying layer to achieve the passivation of the protected 2D materials. The monolayer coating is also stable in air, H2 annealing, and organic solvents, but can be removed by certain organic acids.

scholarly journals Kelvin-Helmholtz discontinuity in two superposed viscous conducting fluids in a horizontal magnetic field

2008 ◽  
Vol 12 (3) ◽  
pp. 103-110 ◽  
Author(s):  
Aiyub Khan ◽  
Neha Sharma ◽  
P.K. Bhatia
Keyword(s):  
Magnetic Field ◽  
Surface Tension ◽  
Growth Rate ◽  
Unstable Mode ◽  
Two Dimensional ◽  
Horizontal Magnetic Field ◽  
Streaming Velocity ◽  
The Stability ◽  
Conducting Fluids ◽  
Streaming Motion

The Kelvin-Helmholtz discontinuity in two superposed viscous conducting fluids has been investigated in the taking account of effects of surface tension, when the whole system is immersed in a uniform horizontal magnetic field. The streaming motion is assumed to be two-dimensional. The stability analysis has been carried out for two highly viscous fluid of uniform densities. The dispersion relation has been derived and solved numerically. It is found that the effect of viscosity, porosity and surface tension have stabilizing influence on the growth rate of the unstable mode, while streaming velocity has a destabilizing influence on the system.

Wafer-Scale Ultrathin Two-Dimensional Conjugated Microporous Polymers: Preparation and Application in Heterostructure Devices

2018 ◽  
Vol 10 (4) ◽  
pp. 4010-4017 ◽  
Author(s):  
Zhengdong Liu ◽  
Mengya Song ◽  
Shang Ju ◽  
Xiao Huang ◽  
Xiangjing Wang ◽  
...  
Keyword(s):  
Two Dimensional ◽  
Wafer Scale ◽  
Microporous Polymers ◽  
Heterostructure Devices ◽  
Conjugated Microporous Polymers

Wafer-scale synthesis of ultrathin CoO nanosheets with enhanced electrochemical catalytic properties

2017 ◽  
Vol 5 (19) ◽  
pp. 9060-9066 ◽  
Author(s):  
Fei Wang ◽  
Yanhao Yu ◽  
Xin Yin ◽  
Peng Tian ◽  
Xudong Wang
Keyword(s):  
Crystal Structure ◽  
Catalytic Properties ◽  
Grand Challenge ◽  
Layered Crystal ◽  
Two Dimensional ◽  
Large Area ◽  
Wafer Scale ◽  
Layered Crystal Structure ◽  
2D Nanomaterials

Large area synthesis of two dimensional (2D) nanomaterials with a non-layered crystal structure remains a grand challenge.

Low-temperature wafer-scale synthesis of two-dimensional SnS2

Nanoscale ◽  
2018 ◽  
Vol 10 (37) ◽  
pp. 17712-17721 ◽  
Author(s):  
Jung Joon Pyeon ◽  
In-Hwan Baek ◽  
Weon Cheol Lim ◽  
Keun Hwa Chae ◽  
Seong Ho Han ◽  
...  
Keyword(s):  
Low Temperature ◽  
Atomic Layer Deposition ◽  
Atomic Layer ◽  
Two Dimensional ◽  
Wafer Scale ◽  
Layer Deposition

Two-dimensional continuous SnS2 is synthesized over a wafer at low-temperature (≤350 °C) by sulfurization combined with atomic layer deposition.

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