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Two Dimensional Materials

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Two Dimensional Materials

Two-dimensional materials (two-dimensional atomic crystal materials) refer to materials in which electrons can only move freely (plane motion) on the nanoscale (1-100nm) in two dimensions, such as nanofilms, superlattices, and quantum wells. , Two-dimensional material is a new type of crystalline material with a single or several atomic layer thickness, covering various types from conductors, semiconductors, superconductors to insulators, ferroelectricity, ferromagnetism, antiferromagnetism, etc., such as boron nitride (BN ), molybdenum disulfide (MoS2), tungsten disulfide (WS2), molybdenum diselenide (MoSe2), tungsten diselenide (WSe2), etc.

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Product Characteristics

Different two-dimensional materials have different electrical properties or anisotropy of optical properties due to the special properties of the crystal structure, including Raman spectroscopy, photoluminescence spectroscopy, second-order harmonic spectroscopy, optical absorption spectroscopy, thermal conductivity, electrical conductivity The anisotropy of properties such as rate is used in polarized optoelectronic devices, polarized thermoelectric devices, bionic devices, and polarized light detection.

Preparation methods of two-dimensional materials:

Chemical Vapor Deposition (CVD):

Large-area two-dimensional materials can be prepared, but the preparation process varies greatly for different materials, and it is difficult to control single crystal, defects, and number of layers

Molecular beam epitaxy (MBE):

samples with high quality single crystals can be obtained, but there are extremely high requirements for the degree of vacuum, the physical properties of elements, and the selection of substrates. Many two-dimensional materials are difficult to prepare by MBE methods, and in In some material systems (such as single-layer FeSe), there is a significant interaction between the two-dimensional material grown by molecular beam epitaxy and the substrate, which affects the study of the intrinsic physical properties of the material.

Liquid phase exfoliation method:

It can realize the mass-production preparation of two-dimensional materials, but defects and liquid phase pollution will be introduced during the preparation process, which is not conducive to the study of the intrinsic properties of two-dimensional materials.

Applications of 2D materials

Graphene and two-dimensional materials (2DM) have been studied in science and engineering for almost 20 years since they were first proposed. The wealth of available data and high performance device demonstrations leave no doubt about the potential of 2DM for applications in electronics, optoelectronics and sensing.

So where are the major challenges and opportunities in adopting 2D materials for applications? Existing technology has shown that 2D materials can take advantage of their superior performance at the semiconductor device level and can be easily integrated with other semiconductor technologies, making them candidates for major extended functionality in semiconductor materials.

The emergence of 2D materials provides a new way to break through the various limitations in performance of conventional semiconductor devices, and offers new ideas for realising various functional applications. We believe that 2D materials will increasingly become an x-factor in future semiconductor integrated products, depending on the target application, and that bottlenecks in heterogeneous electronics based on 2D materials will be broken through to the required level of large-scale manufacturing.

Therefore, the 2D materials R&D team set up by our Research Materials Division has carried out a series of work around the research, preparation and application of 2D materials, and has achieved a number of research results: a certain type of metal-type semiconductor material prepared by us using the chemical stripping method has a high electrical conductivity, and the volume specific capacitance can reach 400-700 F/cm-3, and has good The material has good cycling performance, and has been mass-produced and supplied to downstream customers for semiconductor-grade applications.

Below is a catalogue of some 2D materials we can provide, mainly including insulators, semiconductors, semi-metals, metals and superconductors, etc., which are the hot materials in the field of condensed matter physics and materials science at present, some of which are exclusively distributed by well-known brands and you can choose them freely for your scientific research.

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