Nanoscience is promising research area which is concerned with the study of materials that are in the nano meter scale range. Atoms and molecules are typically a few nanometers in size. Nanometer is a thrilling point on the length scale, where the smallest man-made devices meet up the atoms and molecules of the natural world. Now a days the nano structures made by humans represent the most promising field of material science. The great physicist Professor Richard Feynman, in 1959, gave an idea about what is now known as “nanoscience” during his speech, which was entitled as: “There is Plenty of Room at the Bottom”.
By measuring the amount of current the microscope can resolve where the atoms are on the surface of the material. [(Binnig, G., & Rohrer, H. (1983). Scanning tunneling microscopy. Surface science, 126(1-3), 236-244.) (https://brilliant.org/wiki/quantum-tunneling/ )] Josephan junctions: Some semiconductor materials are superconductors, which means that in certain temperature ranges, a current can flow indefinitely without resistive heating
1.1 General Creation of new materials with novel properties is the main driving force for the development of materials science and technology. Properties of materials are not simply influenced by the chemical bonding and composition, but likewise by the dimensions of materials. As the dimension of a material system reduces to the nm-scale, unique physical and chemical characteristics arise. Nano- materials have been mass fabricated by novel synthetic approaches, and have pulled a great deal interest from scientists and engineers. One interesting case of the nano- materials is carbon nanotubes (CNTs).
Synthesis and Characterization of Iron, Manganese and Tin Based Heusler Alloy Nanowires Ashwin Suresh Department of Physics & Nanotechnology, SRM University –Chennai, India ABSTRCT The ability of Heusler alloys to show half metallicity at room temperature has made them a widely researched topic in the field of Spintronics. I present here the synthesis of nanowires of an alloy of Iron, manganese, and tin by electrospinning technique. The morphology of the nanowires was identified by Field Emission Scanning Electron Microscopy and crystalline size by X-Ray Diffraction analysis and elemental analysis by Energy-dispersive X-ray spectroscopy (EDX) analysis. The morphologies tend to vary with changes in parameters like electrospinning voltage
If m=0,nano tube are called as the ZIGZAG NANOTUBES. And if n=m nano tubes are called as the ARMCHAIR NANOTUBES .else they are called as CHIRAL. SWNTs are an very important variety of carbon nanotube because as the most of their properties change significantly with the
Running Head: FABRICATION AND CHARACTERIZATION OF CONTINUOUS ELECTROSPINNING NANOFIBER YARN 1 FABRICATION AND CHARACTERIZATION OF CONTINUOUS ELECTROSPINNING NANOFIBER YARN. 11 Fabrication and Characterization of Continuous Electrospinning Nanofiber Yarn Students name: Institutional Affiliation Abstract Nanotechnology is a quickly developing multidisciplinary field of research joining different divisions including nanofiber innovation wherein sinewy materials are created at nano scale. Materials in nanofiber frame prompt predominant capacities as well as give a technique to convey capacities to higher request structures. Electrospinning is an appealing procedure equipped for delivering polymeric strands having distances across running from nano to sub-micron level. Nanofibers created by electrospinning can be strengthened by particles to manufacture a composite with novel and tailor made properties.On the off chance that the particles utilized for the fortification are at nano scale too then the support impact can be significantly improved.
By analyzing size of the silicon carbide using particle analyzer, so it is confirmed that milled SiC is a nanoparticulate having the average size of 117d.nm with intensity of 100%. Performing a particle size analysis is the best way to answer the question: What size are those particles? Once the analysis is complete the user has a variety of approaches for reporting the result. A better approach is to report both a central point of the distribution along with one or more values to describe the width of distribution. 5.2.4 Thermal conductivity test Thermal conductivity is used to calculate the heat transfer in a fluid.
The most challenging part of research in the field of nanotechnology is the environmentally safe and cost effective procedures for nanomaterials synthesis. Two approaches have been known for nanomaterial synthesis of ultrafine particles since ancient times. There are two methods employed for the nanoparticle synthesis such as "Top down" and "Bottom up" Synthetic strategies, which can also be considered as physical and chemical methods, respectively. The first is the top-down method by which an external force is applied to a solid that leads to its break-up into smaller particles. This method includes the following techniques: 1.
The word nanotechnology is new, but it’s existence of the functional devices and structure of nanofluid devices are not new in this world. In 1905, experimental data on diffusion theory showed that the molecule has nanometer diameter, which is considered as a notable landmark in the scientific history of nanotechnology. After the investigations made by Choi and Eastman the situation was changed. Choi and Eastman while working at Argonne National Laboratory have reformed this nanotechnology with their metallic powder partiecle having nanosize and carbon nanotube suspensions in 1995
In the one-step technique combines the production of nanoparticles and dispersion of nanoparticles in the base fluid into a single step. There are some variations of this technique. In one of the common methods, named direct evaporation one-step method, the Nano fluid is produced by the solidification of the nanoparticles, which are initially gas phase, inside the base fluid. The dispersion characteristics of Nano fluids produced with one-step techniques are better than those produced with two-step technique. The main drawback of one-step techniques is that they are not proper for mass production, which limits their