The stability of Ni, Cu, Mo and Au transmission electron microscope (TEM) grids coated with ultra-thin amorphous carbon (alpha-C) or silicon monoxide film is examined by in-situ heating up to a temperature in the range 500-850 degrees C in a transmission electron microscope. It is demonstrated that some grids can generate nano-particles either due to the surface diffusion of metal atoms on amor...

Due to the recent droughts, the retube of Sezela evaporators was delayed for a few years, resulting in a need for a low cost carbon steel tube to retube five evaporators. A recent failure highlighted the importance of the heat treatment and expansion characteristics of these tubes. This paper discusses the failure of a carbon steel tube, the development of the heat treatment of locally manufact...

Abstract The introduction of carbon nanotubes (CNTs) in the preparation nano-lead oxide (PbO) can effectively solve problem easy agglomeration oxide. This study used concentrated nitric acid and sulfuric mixed (volume ratio 1:3) to oxidize at 90 °C temperature for 0.5 h. Using oxidized CNTs as carriers, Pb(OAc) 2 · 3H O precursor, ammonia a precipitator, PbO/CNTs complexes were prepared by chem...

in this work the synthesis of polyaniline/chitosan/functionalized single- walled carbon nanotube nanocomposite is carried out. for this purpose single -walled carbon nanotubes were reacted with thionyl chloride to change the hydroxyl to acyl chloride groups for improving the react ability. in other step, aniline monomers and chitosan were polymerized in the presence of iron (iii) chloride to sy...

Drug delivered can have significant effect on its efficacy. Some drugs have an optimum concentration range with in which maximum benefit is derived and concentrations above (or) below the range can be toxic or produce no therapeutic effect. Various drug delivery and drug targeting systems are currently under development. The main goal for developing such delivery systems is to minimize drug deg...

l Precise control over the electronic properties of the carbon nanotubes is key to their practical application in plastic electronics. In the present work, we have extended carbon nanotube functionalization via a 2-2 cycloaddition to electron withdrawing non-fluorinated olefins as well. Our results show that this is a fairly general approach, independent of specifics of the adderid, to converti...