Two-dimensional materials

This work describes an aid to three-dimensional (3D) reconstruction based on serial section technology for better characterizing non-transparent material microstructure and orientation. We found that two separate primary Al2Cu phase dendrites of directionally solidified Ale40%Cu alloy appeared in the twodimensional (2D) microstructure but were shown to be only one dendrite in the three-dimensional (3D) microstructure by using the assistive characterization method.

7p viberbers 09-08-2023 8 3   Download

In this paper, the free vibration of twodimensional functionally graded (2D-FG) sandwich nanobeam is investigated by the finite element method. The material properties of 2D-FG sandwich nanobeam are assumed to vary in both axial and thickness directions according to a power law. Based on Eringen's nonlocal elasticity theory, the governing equations of motion are derived.

7p visirius 18-01-2023 4 2   Download

The main aim of this thesis is to investigate a novel synthesis route to produce 2D bismuth-based nanosheets from liquid bismuth precursors by exfoliating their interfacial oxide. Scalable and large-area synthesis of 2D nanosheets will be developed to access previously inaccessible 2D bismuth-based nanosheets from the non-layered bulk parent material. Subsequently, the as-synthesis 2D nanomaterials will be investigated for different functional applications.

139p runordie3 06-07-2022 9 1   Download

Ultrathin silicon nitride SiNx membrane suspended on a silicon wafer is a popular twodimensional platform in MEMS applications. The unsupported membrane has a low thermal conductivity, is electrically insulated, and very robust against mechanical impact. Remarkably thin, it is difficult to fabricate and manipulate. Recently equipped with a dual chamber system for plasma enhanced chemical vapor deposition (PECVD) and reactive ion etching, we calibrate it to deposit silicon nitride Si3N4, silicon dioxide SiO2, and to dry etch these materials.

8p nguaconbaynhay11 07-04-2021 15 3   Download

This paper present a twodimensional problem of electromagnetic scattering from line source located outside of a metallic elliptical cylinder coved by isorefractive (right-handed material) and anti-isorefractive dielectric (left-handed material) . Analytical solutions of electric and magnetic fields as functions of line source position and layer thickness are discussed in frequency domain.

5p visasuke2711 25-04-2019 20 0   Download