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For Scientific Research & Industry Modernisation.
Since the growth of research on 2D materials triggered by the synthesis of monolayer graphene in 2004, research and applications of 2D graphene oxide films have been widely carried out, and their good optical and mechanical properties are now used in a variety of applications such as integrated optical components, optical lenses, and solar cells. The application of graphene to conductive thin film materials is a very promising work. Compared with the chemical vapor deposition synthesis of other two-dimensional materials, graphene oxide films based on wet chemical synthesis are more suitable for large-scale production and industrial development, and due to these excellent properties, graphene oxide has been widely used in solar cells, water purification, sensors, displays, paper, optical nonlinear devices, etc.
There are many methods to fabricate graphene oxide films (spin-coating, spraying, layer-by-layer self-assembly, and chemical vapor deposition). The different preparation methods have a great influence on the electrical conductivity, light transmission and homogeneity. As the research progresses, the requirement for ultra-thin graphene oxide films is increasing, and the formation of thin films with controllable monolayer thickness and large area graphene oxide films is critical in various applications. In addition, the requirement for flatness of graphene oxide film directly affects the quality of high precision optical components fabrication. Therefore, the realization of graphene oxide films with high flatness, simple operation and green environment is of high commercial and research value.
Conventional method to fabricate graphene oxide metamaterials is time-consuming and costly. Additionally, it is difficult to control the precise thickness of the films. With graphene’s applications expanding, the requirements for the accuracy, controllability and product stability of the fabrication method are becoming higher and higher. Therefore, the focus must be put on fabricating graphene oxide films with low cost and time-saving operation, while maintaining high accuracy and stable quality of the product.
The efficient fabrication technology developed and adopted by Innofocus can produce highly accurate, cost-effective, and highly stable graphene films based on the principle of positive and negative charge adsorption. Such technology can develop broader prospects for scientific research in the fields of optical device fabricating, solar power thermal conversion, information encryption, sensing and nonlinear communication, and the development of new energy technologies.
One of the advantages of the graphene oxide films fabricated by Innofocus is the possibility of selecting different substrates for users. The standard substrate we currently recommend is a 0.7-mm glass substrate. Its specifications can fully meet the requirements for optical device fabricating, and it is easy to preserve and use. Additionally, depending on different fields of the scientific research and different applications, users can choose the optimal substrate material which can best match their specific needs for scientific research.
The nano-graphene films fabricated by Innofocus can be used to enhance the electrical, thermal, mechanical and barrier properties of polymers. We can also fabricate graphene metamaterials on different substrates with arbitrary surfaces and shapes, such as silicon wafers, resin lenses, PET, optical fibre gratings, glass tubes, etc. and large-area coating can be achievable.
Graphene oxide films are currently available in thicknesses ranging from 4 nm to 1 micron. For different processing and application needs, the film thickness should be flexibly adjusted in order to maintain an optimum standard for fabrication and measurement, controlling parameters. In general, the recommended thickness for processing optical components is 100nm – 200nm. Meanwhile, Innofocus provide options of selecting thickness gradient to pursue accuracy in scientific data, with general gradient option of 4nm, 20nm, 40nm, 60nm, 80nm and 100nm as a set of gradient indicators; or 4nm, 40nm, 80nm, 120nm, 160nm, 200nm for the optimal thickness gradient criteria. Choose or customize your thickness gradient and so DIY your own research.
One of the difficulties of graphene oxide film fabrication is to ensure both the size, and the flatness and smoothness of the film at the same time. Innofocus’s fabrication method of GO film has achieved significant improvements in maintaining flatness and smoothness. Large area films, with a maximum diameter up to 12 feet, can still achieve a reliable flatness of less than 5 nm. Currently, the recommended range of sizes is 20mm*20mm to 300mm*300mm.
The GO films fabricated by Innofocus based on electrostatic adsorption principle has multiple strengths, including simple, fast and environment-friendly operation, stable quality of products, price advantages and considerable control of costs. Therefore, we are able to provide our customers with a wide selection of graphene films customization and guarantee the speed of shipment at the same time.
Innofocus delivers high-quality test results, providing excellent data support and data traceability for application research. In addition, Innofocus develops and continuously optimizes automated coating device, combined with high-quality testing standards, to improve the standardized quality of graphene oxide films in all aspects.
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