Microchannels based on microelectromechanical systems (MEMS) have received a lot of interest in the microfluidics and biomedical fields over the past forty years. While their applications have been multifarious, a comprehensive literature review focusing on their design, type, and applications is not currently present in the literature. Researchers working on these elements of microchannels will gain targeted knowledge from the current review on microchannels. Due to its advanced properties, flexibility of mass, and small size, microdevice demand has been rising quickly, particularly in industrial applications. The classification of microchannels and their uses are the main focus of this work. These include but are not limited to molding, electroplating, lithography, lab-ona-chip, micromolding, micromachining, micromilling, laser ablation, lithography, microcontact printing (µcp), hot embossing, electrochemical micromachining (EMM), and etching. In addition, numerous hybrid techniques for microchannel manufacturing have been reported. So, in essence, this review offers a range of advancements in microchannel manufacturing. The review also attempts to present a qualitative analysis describing the various methodologies associated with microchannels in terms of their design, shape, and flow regimes for applications such as pressure drop and transfer of heat prediction. Additionally, depending on the precise uses needed, a number of materials, including but not limited to ceramics, silicon, metals, and polymers, are utilized in the manufacture of microchannels. On metallic substrates, polymers such as silicon, glass, and polymeric materials are used. The biomedical industry uses polymeric and glass substrates instead of silicon substrates, which are used for mechanical engineering and electronic applications. In addition to outlining methods for choosing the best kind of microchannel, this paper also suggests important directions for the future.
The thermal stability of nano composite materials is the important aspect of the modern era. In the advance modern devices, the nanostructures and nano composite material are used for the biological and other applications. The aluminum oxide is the most prominent oxides and composite at nano scale that show different structures, electrical and thermal properties which make it useful in different applications. Sol-Gel technique was used for synthesis to grow these nanostructures of Al2O3-ZrO2. Thermal stability was achieved and thermo-gravimetric (TGA) graphical analysis of synthesized material was performed. Size, phase and structure validation about the productive material was studied by X-Ray diffraction powder technique. Reaction completion and idea about annealing temperature of the synthesized material had pointed out by DSC-TGA (SDT) graphical peaks. Effect of the temperatures with equal variation from 500 0C, 700 0C, 900 0C and 1100 0C was performed to achieve the target thermal stability. Thermal analysis was also conducted in ANSYS workbench to visualize the thermal distributes like heat flux through the material. Optical properties such as band gap variation with temperature were studied by UV-vis analysis. Fourier transform infrared (FTIR) analysis was also performed. This work provides useful information related to nanostructures with sintering effect, residual and thermally stable analysis.
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