Titanium Nitride Nanoparticles Application
Titanium Nitride Nanoparticles Application: Nanoparticles research has become an area of interest to scientists due to the unexpected results produced by altering the atomic and molecular properties of elements. This article deals with the properties and applications of titanium nitride nanoparticles.
Titanium nitride (TiN) is available in coated, dispersed and ultra high purity forms. Their high hardness, high temperature chemical stability, high melting point, infrared absorption and UV shielding find a number of useful applications. Titanium belongs to Block D, Period 4 while nitrogen belongs to Block P, Period 2 of the periodic table. Some of the alternate names of titanium nitride are tinite, nitridotitanium and azanylidynetitanium. It is important to maintain dryness while storing these nanoparticles and also avoid any stress on them.
Transition metal nitrides, especially titanium nitride (TiN), have been studied for the last three decades due to the unique combination of their material properties. Metallic behavior of TiN combined with its hardness and chemical stability has attracted attention in microelectronics research.
Titanium nitride (TiN) attracts attention due to its plasmonic resonance located in the visible and near-infrared range where important spectral regions such as biological transparency and telecommunication windows are present. Moreover, TiN provides superior material properties such as high melting temperature, corrosion resistance and bio-compatibility for real-world plasmonic applications. Recently, researchers have shown that TiN nanoparticles can provide comparable field enhancement and better absorption efficiency in the biological transparency window when compared to Au particles. Use of TiN for photo thermal therapy requires the availability of colloidal nanoparticles that exhibit plasmonic properties similar to optimized thin film samples. However, powder production of TiN for optical use has not been studied extensively.
PROPERTIES OF TITANIUM NITRIDE
Titanium nitride (TiN) films demonstrate excellent mechanical properties like hardness, high wear resistance and good chemical inertness. Mentioned films are also important for their biocompatibility, resistance against corrosion and reduction of the bacterial colonization. They offer many applications such as contact layers in semiconductors, anticorrosive, hardening coatings for tools and protective antireflective coatings for displays.
Titanium nitride is deposited by both physical and chemical vapor deposition techniques. Chemical vapor deposition from titanium tetrachloride and a nitrogen and hydrogen mixture is thermodynamically favorable at 850°C but temperatures above 1000°C and as high as 2000°C are generally used for durable machine tool coatings since this produces high quality very hard wearing TiN. However these conditions are too harsh to be applied to integrated circuits and limits coating applications on glass. Physical vapor deposition from Ti targets and nitrogen in argon produces high purity TiN on temperature sensitive substrates, such as those used in IC technology, but unsuitable for large area deposition.
|Molar Mass||61.87 g/mol|
|Melting Point||2950 ° C|
|Electronic config.||Titanium [Ar] 3d24s2
Oxygen [He] 2s22p3
APPLICATIONS OF TITANIUM NITRIDE NANOPOWDER
TiN is widely being used on wear surfaces like cutting tools to enhance life of cutting tools / wear surfaces. A coating of 1-4 microns are applied on the substrate in a vacuum chamber by vaporizing titanium directly from solid metal( high purity) to vapor stage (ion) & allowed to react with nitrogen, the high potential difference between substrate & cathode (Titanium rod) attracts the titanium ions on the substrate, where it reacts with nitrogen & forms TiN.
Thin layers of titanium nitride with a thickness in the range of a few micrometers are used for wear protection of tools. Layers with high nitrogen content, e.g. TiN1.0, give the coated parts a gold-like color. Titanium nitride powders with a particle size from nano to micrometers are used as additive in the production of wear-resistant sintered materials like hard metals, silicon nitride or cermets. Furthermore it is added to plastics, particularly to PET. TiN improves the thermal properties of the material and allows increasing the production output of PET bottles. According to the German Foods and Commodities Ordinance the addition of titanium nitride is limited to 20 mg TiN per kg PET. Pure TiN powers can be used to manufacture ceramic crucibles or evaporation boats in which metals are melted.
TiN are used in artificial limbs and for Barrier layer in contact and interconnect metallization. These nanoparticles are also used as Biological materials cutting tools, Gate electrode in metal-oxide-semiconductor (MOS) transistors, Low-barrier Schottky diode, Optical devices in aggressive environments and in Plastic molds.
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