Nanografi Nanotechnology

Nano-cellulose is a material that consists of  cellulose nano-fibers , which are a string of cellulose molecules with an elongated tubular shape. Nano-cellulose in the future will be cheap, resistant, organic and ecological. It is paradoxical that the future solutions for the world that will serve as the basis for the technological infrastructures and will govern the life of future generations are not visible to the human eye. Scientists from the University of Texas use the same bacteria that produces coconut cream to transform algae into nano-cellulose; an element that could revolutionize the world. Nano-cellulose is a plant material that is broken down into microscopic pieces, then purified and rebuilt. The bacterium Acetobacter xylinum is able to synthesize the cellulose found in blue-green algae, with only a little water, sunlight and time. The process absorbs carbon dioxide, the greenhouse gas mainly responsible for global warming. Properties of Nanocellulose It is li...

Silver nanowires are a type of silver nanomaterials that are expressively different in comparison to silver nanoparticles. As the name indicates, these nanomaterials have three dimensions. The unique properties of this conductive nanomaterial have led to increasing use of silver nanowire-based technologies, such as in the manufacturing of flexible touchscreen displays. However, the potential adverse effects of these "thin but long" and highly reactive silver nanowires have been poorly understood so far. The goal should be the development of new and safer technological applications of silver nanowires. Silver nanowires  of different sizes, coatings, and shapes are being synthesized and analyzed by the consortium for potential human and environmental impacts. The properties of the nanowires that cause concern are identified and new synthetic methods are developed to produce silver nanowires with lower potential risks. New approaches to the recovery of silver nanowires are ...

Hydroxyapatite is a calcium phosphate compound, its formula is Ca 10  (PO 4 ) 6 (OH) 2 . It is a part of the raw material, called phosphoric rock. The term hydroxy refers to the anion OH ‑ . If instead of that anion is replaced with fluoride, the mineral would be called Fluoroapatite Ca 10  (PO 4 ) 6 (F) 2 . Hydroxyapatite is the main inorganic component of the bones and dental enamel. Hydroxyapatite predominantly exists in two forms which are nanoHydroxyapatite powder and micron Hydroxyapatite powder. The difference between the two is of size. The size of  Hydroxyapatite nanoparticles  is below 200 nm whereas  micron Hydroxyapatite  exists in the range of 45 – 90 micron. The surface area for Hydroxyapatite nanoparticles is around 9.4 m 2 /g whereas  Hydroxyapatite micron powder  has a surface area of 120 m 2 /g. History and importance of Hydroxyapatite The use of Hydroxyapatite began after 1950 when after a lot of research, it was found ...

Silver conductive adhesive paste,  also known as conductive paint, is a material which is highly conductive. It looks like glue, but it is conductive and has a gray color. This innovative material is not only used in industry but also for research purposes.  Main usage purpose of this material is to convert insulative surfaces into conductive surfaces. It is denoted by Ag, and it has purity of %75 so it is highly conductive electrically and thermally. As the name of the material implies, the adhesion of this material is high meaning that it can adheres to any surface easily. It is the  raw material  for printable conductive ink which is mostly used in printed circuit boards (PCB). PCB’s are the main part of the computers, smartphones and many other devices so application field of silver conductive adhesive paste is broadened fort the past decades.  One of the main advantages of this material is that it can be easily applied to surfaces that cannot be sold...

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, high thermal conductivity. Obtaining single layer graphene or few-layer graphene by adhesive tape or cleavage methods is not practical because these methods provide only limited opportunity for scaling up the graphene. However, the chemical vapor deposition (CVD) process has been explored to synthesis large size single crystals and uniform films of monolayer graphene and bilayer graphene.  CVD is a method to produce graphene  which is fast, cheap and scalable. According to the experiences of graphene synthesis, it is well known that the growth of graphene is much easier from what is called ‘seed’. Chemical Vapor Depositio...