Graphene UV Sensors

Graphene is a two-dimensional nanomaterial which is composed of monolayers of sp2-bounded carbon atoms. Graphene has drawn considerable attention in both academic and industry area for various potential applications including semiconductors, energy storage devices, and sensors due to their physical properties such as high room-temperature mobility and high thermal conductivity.

Find All Applications of Graphene Here: 60 Uses of Graphene – The Ultimate Guide to Graphene’s (Potential) Applications in 2019

Graphene's Photoresponsivity and Graphene Quantum Dots

Although graphene shows low photoresponsivity due to weak light absorption in its structure, there is an option to overcome this problem. Fortunately, Graphene Quantum Dots which are a type of graphene with lateral dimensions less than 100 nm, have unusual chemical, physical, electronical, optical properties from quantum confinement. Also, GQDs are considered to be an alternative to traditional fluorescent nanomaterials used in sensor applications. In addition, GQDs are environmentally friendly and promising green nanomaterials. Thus, combining the outstanding optical and electrical properties of GQDs with superior physical properties of graphene by forming hybrid structures, graphene-based UV sensors with performance can be constructed.

Why is it Important to Detect UV?

As it is well known that the detection of ultraviolet radiation has a great importance in both military and civilian fields such as optical communication, environmental monitoring, and others. In particular, UV monitoring is an important issue as UV radiation from the sun generates free-radical chemical species that cause various skin problems including aging and skin cancer. The combination of graphene-based hybrid materials can provide unique physical properties and show high photoresponsivity and detectivity.

Advantages of Graphene UV Sensors

Graphene-based UV sensors’ main advantage to other UV sensors is that they are flexible and transparent. Graphene UV sensors have remarkable transparency and superior mechanical flexibility without showing any significant change in electrical resistance. In addition, the synthesis of UV sensors is low-cost and executable.

To conclude, the discovery of graphene has stimulated a lot of research in numerous applications. Graphene and other two-dimensional materials have enabled a new class of materials to be developed. Even though graphene has limited responsivity, with chemical functionalization absorption can be enhanced and the responsivity can be improved. These improvements are achieved by combining graphene with other materials to form hybrid photodetectors. The improvements of interfaces between graphene and the other materials help to improve absorption coefficient. In summary, graphene-based photodetectors offer a small footprint promising for next-generation flexible and wearable electronics. The more investigations about graphene will help to develop more efficient devices used in various fields.

Multi Walled Carbon Nanotube Dispersions

Carbon nanotubes (CNTs) have attracted enormous attention in recent years due to its unique physical, electronic, optical and potential applications in materials science and nanotechnology. The van der Waals interaction between tubes, however, makes CNTs aggregate in most organic solvents and aqueous solutions, which is the major limitation of their practical applications.Various approaches have been studied to alter the CNT surface to promote the dispersion of individual nanotubes and prevent their reaggregation. On the basis of this widely accepted viewpoint, numerous techniques such as covalent bonding, surfactant coating and polymer wrapping have been developed for surface modification or sidewall functionalization.These methods, however, are complicated, time-consuming and cause permanent damage to the CNT structure and properties of the surface, which produces residues of the dispersion agent for the final product. Figure: Single Walled Carbon Nanotube (SWCNT) It has re

Carbon Nanotube Threads

Since its discovery, carbon nanotube (CNT) has attracted many interests in different technology fields due to its extraordinary properties. Properties such as, high strength, great electrical and thermal conductivity, light weight and flexibility made CNT one of the best materials for wide range of applications. However, from its name it can be understood that CNT is a nanoscale material which is very small to be applied for the production of daily products. Researchers all around the world are working on finding methods and techniques which could produce new materials with the extraordinary properties of CNT. Image retrieved from: https://worldindustrialreporter.com/strong-light-flexible-carbon-nanotubes-threads-with-ultrahigh-conductivity/ One of these research is focusing on the production of high strength threads that can be used in the manufacturing of fabrics, cables and ropes. An international group of scientists were able to produce a flexible conductive thread that i

Magnesium Oxide Nanoparticles/Nanopowder and Applications

General Information about Magnesium Oxide Magnesium oxide which has the chemical formula of MgO, is a white hygroscopic solid mineral that occurs naturally as periclase and is a source of Magnesium. It is a white powder at room temperature. Magnesium Oxide has very high melting point (2825 o C) and boiling point (3600 o C). Magnesium Oxide Nanoparticles/Nanopowder and Usage Areas Magnesium Oxide nanoparticles/nanopowder can be used in many different areas. For example Magnesium Oxide nanoparticles/nanopowder are used as a fire retardant for chemical fiber and plastics trades. For making crucible, smelter, insulated conduit, electrode bar, and electrode sheet Magnesium Oxide Nanoparticles/Nanopowder can be used as electric insulating material. Magnesium Oxide nan

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