Abstract
It is well known that the optical materials are unique and perspective. Optical materials and the devices based on them are operated in the broad spectral range: In the UV spectral range (where the wavelength l is approximately placed in the range of ~ 0.1 - 0.4 microns), in the VIS spectral range (l ~ 0.5 - 0.75 microns), and in the IR spectral range (l is larger than the 0.75-1 microns). These materials can be considered to resolve the different complicated tasks. To study optical materials different techniques and methods should be scrupulously used. Among different applied methods namely the laser oriented technique and nanostructuration approach have some unique features. It can be considered as the effective dominant approach in order to reveal the change of all basic physical-chemical characteristics of the materials. Our own steps in this direction have partially been recently shown too. In the current paper, advantages of the modification of optical material surfaces via a nanotechnology approach will be shown. The surface relief change provokes the spectral, mechanical and wetting phenomena changes. A CO2-laser is applied to modify the optical materials surfaces under the condition when the carbon nanotubes are deposited in vertical position at the materials surfaces. This process permits to organize covalent bonding between the carbon atoms and the model matrix ones. An emphasis will be given on the surface modifications of the materials, such as: LiF, CaF2, KBr, BaF2, Sc, some polymer surface, etc. Mechanisms responsible for the spectral characteristics change, mechanical hardness as well as the increase of the wetting angle will be discussed. The area of the application of the materials studied can be increased.
Highlights
Optical materials occupy a unique due to their strategic application in space, aircraft building, automotive, and various civil applications
Such materials and the devices based on the optical materials are operated in the UV spectral range, in the VIS spectral range, in the IR-spectral range and can be considered advantageous in resolving different complicated tasks
MgF2 structures are used in hospitals to disinfect the premises when using ultraviolet radiation; Si-based substrates are considered effective matrices for solar energy elements; α-Si:H systems are applied as effective photosensitive layers in electrically- and light-addressed spatial light modulators; ZnO and ITO conducting layers are used to apply the bias voltage for display and the solar energy constructions; KBr and LiF crystals are considered important materials for Furrier spectrometry and the passive shutter
Summary
Optical materials occupy a unique due to their strategic application in space, aircraft building, automotive, and various civil applications. It can be seen that the transparency and reflective characteristics are occur at the same time as each other and the Fresnel losses (connected with the relation of the refractive index between CNTs and matrix material one) from the nanostructures surfaces can be decreased by using the CNTs laser oriented deposition technique. CaF2 materials spectra, hardness and wetting angle Modification of the properties of the CaF2 structures by the LOD technique predicts a dramatic change in the basic parameters. Other different inorganic crystals used in the general optoelectronic area can be modified via the surface structuration in order to reveal the change of their spectral and mechanical characteristics and the wetting properties as well. Using the consideration based on the LiF, CaF2, KBr, BaF2 inorganic crystals it can be proposed that using the CNTs via a LOD application is an innovative way to modify the physical-chemical characteristics of this type of inorganic materials
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