Graphene Testing and Analysis

Graphene is a new material in which carbon atoms bonded together by hybrids are tightly packed into a single-layer, two-dimensional honeycomb lattice structure. Graphene has excellent optical, electrical, and mechanical properties and has important application prospects in materials science, micro-nanoprocessing, energy, biomedicine, and drug delivery. Based on current research results, the first commercial applications are in the fields of mobile devices, aerospace and new energy batteries.

Products tested in advanced laboratories include, but are not limited to:

• Single-layer graphene: It is a kind of two-dimensional carbon material consisting of a layer of carbon atoms packed periodically and closely to the structure of the benzene ring.
• Double-layer graphene: It is a kind of two-dimensional carbon material consisting of two layers of carbon atoms packed periodically and closely to the benzene ring structure and stacked by different stacking methods (such as AB stacking, AA stacking).
• Low-layer graphene: It is a two-dimensional carbon material consisting of 3-10 layers of carbon atoms, periodically and closely packed into the benzene ring structure and stacked in different ways (such as ABC stacking, ABA stacking).
• Multilayer graphene: It is a kind of two-dimensional carbon material composed of carbon atoms by periodic close stacking of the benzene ring structure, the thickness of which is more than 10 layers and less than 10 nm, stacked in different ways (such as ABC stacking, ABA stacking).

The methods applied in graphene tests include, but are not limited to:

• Microscopy methods: The growth area and surface morphology are determined by scanning electron microscopy, scanning tunneling microscope and transmission electron microscopy. Surface morphology, thickness, layer uniformity and area growth are determined by atomic force microscopy method.
• Spectroscopy methods: Graphene layers are defined by Raman spectroscopy. The presence of functional groups is evaluated by infrared spectrum method.
• Mechanical performance test methods are: Young's modulus, poisson's ratio, expansion test, surface tension (relaxation and self-compaction of graphene film), gas transmission rate of graphene film.

Our organization also provides graphene testing and analysis services with its trained and expert staff and advanced technological equipment, among the numerous test, measurement, analysis and evaluation studies it provides for businesses in various sectors.