Journal of Nano Research Vol. 6

Abstract: This work first explores high resolution transmission electron microscopy (TEM) to determine the interfacial regions and provide experimental evidences for interfaces between the SDC and carbonate constituent phases of the SD-carbonate two-phase composites to further investigate the superionic conduction mechanism in the ceria-carbonate composite systems and enhancement of conductivity. Schober first reported interfacial superionic conduction in ceria-based composites but without direct experimental proofs. Such superionic conduction mechanism remains unknown. Especially, in the nano-scale, this region is trifle to be detected.

Abstract: The nano crystalline nickel-cobalt ferrite using albumen (egg white) is synthesized by thermal evaporation method and its dielectric behaviour is analyzed for different annealing temperatures. The dielectric property of the sample is measured using impedance analyzer in the frequency range 1-100 MHz. The variation of dielectric constant and dissipation factor under different frequency for the samples at different annealing temperature are analyzed. A steady dielectric constant is observed for the sample annealed at 500°C. The dielectric constant obtained for this sample is low and it is in the range of 18.9 to 6.9 for different frequencies. This low value of dielectric constant shows the less interfacial polarization due to high resistivity which may be to the presence of a few Fe2+ ions. It is observed that the dispersion in dielectric constant by varying the annealing temperature is producing an intended result. The presence of constituent phases in Ni1-xCoxFe2O4 is confirmed by X-Ray Diffraction. The particle size for Ni1-xCoxFe2O4 obtained from Scherrer equation is found to be is 30nm. The morphology, particle size and percentage composition of elements are measured by employing Transmission Electron Microscopy (TEM), Scanning Electron Microscopy (SEM) and Energy Dispersive X-Ray Analysis spectrum (EDX).

Abstract: Here we describe a simple and effective approach to make silicon-based-nanowires structured materials which can be utilized in a range of high technology electronic devices. The strategy for achieving this objective is to create platforms by lithographic patterning on which the diffusion length of reactive species is controlled during the subsequent heat treatment leading to the growth of aligned and linear nanowires. With this simple and versatile method, a large quantity of nanowires can be readily arranged into interesting configurations. This method is proving very promising for a variety of applications, all of which require considerable selectivity and reproducibility in terms of size, shape and structure, to ensure reliability during their use.

Abstract: Without understanding the property of stickiness there are limits as to how far we can use it and how sticky we can make an object. Understanding of what affects stickiness is critical. Are surface roughness and stickiness related What is the difference between the sticky and non-sticky objects at a molecular level We decided to look at the difference between the sticky and non-sticky objects. We reasoned that if we collect sticky and non-sticky objects and compare them through the naked eye, a high powered microscope, and an atomic force microscope (AFM), then the objects that are stickier will have more surface roughness than the objects that are less sticky. Results from our imaging of and analysis of the force of adhesion (which gives a measure of stickiness) between non-sticky objects and sticky objects through the AFM have shown us a different relationship between the surface roughness and stickiness than we had reasoned – the relationship that we have discovered is that stickiness is inversely related to the surface roughness of the materials. Our findings could be used to design new adhesives with different materials that are stronger, lighter and more cost effective that the adhesives used today.