Skip to main content

CVD Graphene - Monolayer Graphene on SiO2/Si Substrate

Graphene, a single-atom layer of carbon atoms packed into a two-dimensional honeycomb lattice, has many unique properties like high carrier mobility, an ultra-thin body, high sustainable current, stretchability and a high transparency, and is thus considered a promising material for device applications such as in magnetic sensors, radio frequency analogelectronics, gas sensors,photon-detectors and flexible electronics.
The most important precondition for realizing such device-level applications is scalable production of uniform high-quality monolayer graphene. Many methods have been developed to prepare graphene, for example, mechanical exfoliation, chemical vapor deposition (CVD) on metal substrates, epitaxy on silicon carbide and reduction of graphite oxide. Among these approaches, mechanical exfoliation undoubtedly provides pristine graphene with the best quality; however the extremely low efficiency hinders its application.
The CVD method is the most competing one to combine mass production and high quality potentially, and is considered the most promising method for pushing graphene into commercial products. Compared to exfoliated graphene, graphene prepared through the CVD method usually exhibits low performance, like lower mobility, greater residual impurity and higher asymmetry between n- and p-branch, while recent studies have revealed significant progress in the quality of CVD graphene through improving the growth and transfer processes. As a result, CVD graphene with a high mobility has been obtained after being transferred to the Si/SiO2 substrate.
The main aim of transferring of graphene to Si/SiO2 to increase the mobility of graphene films. If we look at the studies related to this topic we see that Monolayer Graphene on SiO2/Si Substrate (2"), has better lubrication performance compared with graphene films itself. According to the studies it can be seen that monolayer graphene on SiO2/Si substrate acts as a very good solid lubricant by the reduced coefficient of friction.
Labels:

Comments

Post a Comment

Popular posts from this blog

Molybdenum Trioxide Nanoparticles/Nanopowder and Applications

General Information about Molybdenum Trioxide                                                     Molybdenum trioxide is chemical compound with the formula MoO3. Its chief application is as an oxidation catalyst and as a raw material for the production of molybdenum metal.  Molybdenum Trioxide  is a very light blue powder. Molybdenum Trioxide Nanoparticles/Nanopowder and Their Applications                                                    Like many  nanoparticles/nanopowder , Molybdenum Trioxide nanoparticles/nanopowder are used as catalysts. These catalysis reactions include hydrogenation catalysis and cracking catalysis. Molybdenum Trioxide nanoparticles/  nanopowder are useful for...
Post a Comment
Read more

Rundown about Silicon Oxide Wafer

The main insulating material used in micro-technology is Silicon Dioxide, which in chemical symbols is written as SiO2. In semiconductor technology, SiO2 thin film layers are mainly used as dielectric material film in transistors, capacitors (DRAM) or flash-memories. Silicon Oxide Wafers are produced using crystallization, solid state and other ultra-high purification processes such as sublimation. This process forms a cylindrical ingot, which is then sliced and polished to form wafers. Thermal oxide is a kind of "grown" oxide layer, compared to CVD deposited oxide layer, it has a higher uniformity, and higher dielectric strength, it is an excellent dielectric layer as an insulator . In most silicon- based devices, thermal oxide layer play an important role to pacify the silicon surface to act as doping barriers and as surface dielectrics. The simplest way to produce an insulating silicon oxide layers (SiO2) on silicon wafers is to oxidize silicon with oxygen, which ...
Post a Comment
Read more

New Way of Deaf-Mute Communication with 3D Graphene

Image retrieved from: http://blogs.rsc.org/cc/2016/09/01/3d-graphene-adds-dimension-to-deaf%E2%80%93mute-communication/ Chinese scientists have developed wearable electronic device with conductive 3D graphene structure to translate sign language into written text. This technology can be applied by injecting graphene ink from a syringe under printed electronic field. For medical field, such as adhesive patches which determine heart, brain signal and neural activity, wearable and bio-integrated medical devices are very important. Due to noticeable properties of cast graphene, for example a 2D honeycomb lattice, excellent mechanical and electrical behaviors, Graphene has an important material in warble technology. However, it is difficult to preserve advantages of Graphene material in a 3D material which has an information about forces from every angle. Yanlin Song  and co-workers at the University of the Chinese Academy of Sciences, Beijing, and Shenyang Jianzhu University...
Post a Comment
Read more