In this paper, we study the band structure engineering of black phosphorus/graphene/MoS2 (BP/graphene/MoS2) van der Waals heterojunctions based on ab initio simulations. The density of state and charge density of BP/M...
In this paper, we study the band structure engineering of black phosphorus/graphene/MoS2 (BP/graphene/MoS2) van der Waals heterojunctions based on ab initio simulations. The density of state and charge density of BP/MoS2, bilayer-BP/MoS2, bilayer-BP/graphene/MoS2 and graphene/bilayer-BP/MoS2 heterojunctions are also investigated. It is found that the bandgaps of these four heterojunctions are smaller than the case of single layer BP or MoS2. When graphene is inserted into or stacked upon BP and MoS2 layers, the heterojunction can obtain a minimum bandgap and a higher density of state distribution. In the differential charge density diagram, electrons over the carbon, sulfur and phosphorus atoms are lost from those corresponding parts. These investigations based on the band structure engineering of 2D van der Waals heterojunctions can provide an effective guidance to manufacture the future nanoscale high performance photovoltaic and optoelectronic devices.
Laser-assisted glass frit bonding encapsulation (hereafter referred to as Laser bonding) is proposed for encapsulating air sensitive device that need a hermetic package with long-term stability. Laser bonding technolo...
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Laser-assisted glass frit bonding encapsulation (hereafter referred to as Laser bonding) is proposed for encapsulating air sensitive device that need a hermetic package with long-term stability. Laser bonding technology is a typical local non-contact heating technology, which allows temperature-sensitive devices to be used inside cell. With the excellent barrier performance, glass frit play an important role in encapsulation. Many factors such as the particles size, paste viscosity during process and unfairness of the surface morphology caused in screen printing process can cause the formation of defects in glass frit, weakening the barrier properties for blocking moisture and oxygen. We found that high saddle height difference comes out due to improper viscosity and improper printing process. In order to further verify the reliability of the glass laser encapsulation in the temperature output mode, the water vapor transmission rate (WVTR) of the encapsulated structure was tested using the active metal calcium electrical test method. Finally, we found that the lower saddle height difference is contributes to the smooth surface appearance. Furthermore the lower saddle height difference conducts to lower WVTR.
A new method for fabrication of ZnO nanorods was reported. ZnO nanorods were synthesized by electrospinning technology and heat treatment with polyvinyl alcohol (PVA) and Zinc acetate as precursor. After heat treatmen...
A new method for fabrication of ZnO nanorods was reported. ZnO nanorods were synthesized by electrospinning technology and heat treatment with polyvinyl alcohol (PVA) and Zinc acetate as precursor. After heat treatment of ZnO electrospun nanofibers, ZnO nanorods were obtained. Morphology of ZnO nanorods was characterized by Scanning electron microscopy (SEM). Various morphologies, such as sphere, flower and plane composed of ZnO nanorods were observed. Transmission electron microscopy (TEM) images demonstrated ZnO nanorods are a single crystalline structure with a diameter of 100-180 nm. The hexagonal wurtzite structure of ZnO nanorods was determined by X-ray diffraction (XRD) pattern and Raman spectra.
Solid-liquid-gas reactions are ubiquitous. An understanding of how gases influence the reactions at the nanoscale is significant for achieving the enhanced triple-phase reactions. Here, we report a real-time observati...
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A bacteria-immunity system model is formulated to describe the interaction between bacteria and immune cells with quorum sensing. Time delay is introduced to study this system. The stability and the conditions for the...
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In this paper,we studied the approximate sampleddata observer design for a class of stochastic nonlinear ***-Maruyama approximation was investigated in this paper because it is the basis of other higher precision nume...
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In this paper,we studied the approximate sampleddata observer design for a class of stochastic nonlinear ***-Maruyama approximation was investigated in this paper because it is the basis of other higher precision numerical methods,and it preserves important structures of the nonlinear ***,the form of Euler-Maruyama model is simple and easy to be *** results provide a reference for sampled-data observer design method for such stochastic nonlinear systems,and may be useful to many practical control applications,such as tracking control in mechanical *** the effectiveness of the approach is demonstrated by a simulation example.
Multi-view video plus depth (MVD) is an efficient format of 3D video. MVD video can be encoded by either H.264/AVC or HEVC standard to gain higher compression ratio, which benefits their broadcasting over the Internet...
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The glass and glass laser bonding technology is a laser cladding technology with glass frit as adhesive *** to the thermal expansion coefficient of glass and other factors,the bonding process window is *** uniform tem...
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The glass and glass laser bonding technology is a laser cladding technology with glass frit as adhesive *** to the thermal expansion coefficient of glass and other factors,the bonding process window is *** uniform temperature field is required for glass laser *** traditional encapsulation used constant power laser is easy to lead to the unevenness of temperature field distribution and affect the quality of *** on bismuth salts glass slurry,the encapsulation method combining low temperature laser scanning and high temperature laser scanning is proposed under the constant temperature *** the glass encapsulation effect under different output temperature of the laser technology,the process of laser bonding is *** sample with no crack on the surface of the laser bonding has *** the same time,the water vapor transmission rate(WVTR)of encapsulation structure is 2.0875 × 10-5 g/m2·day with the electrical Ca test.
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