scanning electron microscope Articles
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Temperature dependent exciton radiative lifetime in ZnO nanorods
In this paper, we report the fabrication of ZnO nanorods using vapour phase transportation. The morphology of ZnO nanorods is characterised using scanning electron microscope. The optical properties of the nanorods are studied using time-integrated photoluminescence and time-resolved photoluminescence. It is found that the exciton radiative lifetime increases with temperature. The mechanism for ...
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Effect of sludge retention time on characteristics of dynamic membrane in sequencing bioreactors
The characteristics of self-forming dynamic membrane (DM) in sequencing bioreactors under different sludge retention times (SRT) (SRT = 5, 10, 20, 40, 60 days) were studied using a scanning electron microscope, particle sizing distribution and others. The results indicated that the SRT has an evident effect on the characteristics of DM. The content of extracellular polymeric substances and ...
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The Canadian Centre for Electron Microscopy: a national facility for ultrahigh resolution electron microscopy
The Canadian Centre for Electron Microscopy is described and the facilities available to Canadian researchers and international collaborators are presented. The facility offers aberration-corrected transmission electron microscopy instrumentation, conventional transmission electron microscopes, scanning electron microscopes and a suite of sample preparation facilities. The advantages and benefits ...
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Electrochemical dechlorination of 2,4-dichlorophenol in aqueous solution on palladium-loaded meshed titanium electrode
Electrochemical dechlorination of 2,4-dichlorophenol (2,4-DCP) in aqueous solution was investigated on palladium-loaded meshed titanium (Pd/Ti) electrode at ambient temperature. Pd/Ti electrode was prepared with an electrodepositing method. Scanning Electron Microscope (SEM) micrographs show that Pd microparticles uniformly disperse on the meshed Ti supporting electrode with spheroidal structure. ...
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Scanning Electron Microscope (SEM): A Powerful Tool for Unveiling the Microscopic World
The scanning electron microscope (SEM) allows us to observe the world in a level of detail that was previously unattainable. SEMs scan a sample's surface with a concentrated electron beam to create high-resolution images. SEM images can be used to examine a variety of materials, including biological tissues, metals, ceramics, and polymers. How does a scanning electron microscope work? A beam of ...
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Effect of accelerators and stabilisers on crystallinity of binary and ternary electroless nickel alloys
Autocatalytic binary and ternary Ni-P, Ni-W-P alloys films were prepared using alkaline citrate-based baths. The effect of succinic acid and thiourea on the formation characteristics was investigated. The addition of these additives caused a change in phosphorus and tungsten contents of the deposits. The coating thicknesses were determined by using scanning electron microscope and the ...
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Catalyst characterisation of Fe-doped-titanium dioxide
Fe (5 wt. %) doped TiO2 was synthesised using a hydrothermal method. This material was characterised by X-Ray diffraction (XRD), Raman spectroscopy, scanning electron microscope (SEM) imaging, BET surface area, X-Ray photoelectron spectroscopy (XPS) and ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS). The BET surface area was 136 m²/g and crystal sizes of 1.6 microns. SEM ...
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Micromechanisms of dynamic fracture in biopolyester
A biopolymer is a naturally occurring polymeric substance formed from individual molecules in a biological system. Biopolymers can also be synthetic by manipulation of the individual molecules once obtained outside the biological system. In the present investigation, attempts are made to investigate the basic mechanisms of dynamic fracture in a polyester biopolymer. Izod impact tests of polyester ...
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E–beam lithography processing of Au–nanowire contacts for development of gas sensors based on tungsten–oxide nanorods self–assembled on mica
This work describes the processing of Au nanowire arrays on insulating substrate developed to contact tungsten–oxide nanorods self–organised on the mica surface. The combination of electron beam lithography in scanning electron microscope and lift–off process is shown to be effective in fabricating nanocontact finger patterns with a line width of about 270 nm and 400 nm on bare and WO3 nanorod ...
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The effect of Ce doped in Ti/SnO2-Sb2O3/SnO2-Sb2O3-CeO2 electrode and its electro-catalytic performance in caprolactam wastewater
Ti/SnO2-Sb2O3/SnO2-Sb2O3-CeO2 anodes were prepared by brush coating with high temperature oxidation. The anodes were characterized by X-ray diffractometer (XRD), scanning electron microscope and cyclic voltammetry. The surface of the electrode shows more compact and exist shallower mud cracks than the others by coating with 1% Ce to the surface of Ti/SnO2-Sb2O3 electrode. The XRD patterns show ...
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A Simple Guide to How Aerosol Particle Counters Work
Overview Aerosol particle counters are built to rapidly count and size contaminant particles in cleanroom air and other controlled environments. Users tend to see this as a device where a button is pressed and absolute results tumble out. However, when measuring anything small, it is important to be aware of the technology within the instrument to understand the relevance of the data generated, ...
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Removal of aniline from aqueous solutions by activated carbon coated by chitosan
In this work, activated carbon (AC) coated by chitosan was synthesized and characterized by Fourier transform infrared spectrophotometer and scanning electron microscope (SEM) techniques. The removal of aniline from aqueous solutions by AC coated by chitosan was investigated. The factors affecting the adsorption of aniline onto AC coated by chitosan, including the ratio of AC to chitosan, ...
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Preparation and characterization of iron oxide nanoparticles coated with chitosan for removal of Cd(II) and Cr(VI) from aqueous solution
This study investigated the applicability of magnetite Fe3O4 nanoparticles coated with chitosan (CMNs) for the removal of some toxic heavy metals from simulated wastewater. Magnetic nanomaterials were synthesized using the co-precipitation method and characterized by transmission electron microscope, scanning electron microscope, X-ray diffraction, and Fourier transformer infrared spectroscopy. ...
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Nanomanipulation and characterisation of individual nano-objects inside a SEM
This paper describes the use of nanomanipulation for deforming, picking up and positioning nano-objects in situ in a field emission scanning electron microscope using an in-house built manipulator. Our experiments demonstrate that physical manipulation can be used in a wide range of different experiments and systems. The scope of possibilities is quite large, from mounting nanodevices to ...
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The Measurement of Gas Bubble Size Distributions in a Three Phase Laboratory Gassy Soil
The technique developed can be used to measure the total void, gas void, or particle size distribution in both gassy and saturated sediments provided the void spaces, or particles, can be approximated to spheres. Here the technique is demonstrated for measuring gas bubble size distribution in a reconstituted estuarine silty clay, which has been impregnated with methane gas using the method ...
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Adsorption characteristics of Cu2+ on NiFe2O4 magnetic nanoparticles
Magnetic NiFe2O4 nanoparticles have been synthesized and used as adsorbents for copper removal from aqueous solution. The NiFe2O4 nanoparticles were characterized by scanning electron microscope, transmission electron microscope, X-ray diffraction, and Fourier transform infrared spectroscopy. The batch removal of Cu2+ ions from aqueous solutions using NiFe2O4 magnetic nanoparticles under ...
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Kinetics and mechanism of desilication reaction in sodium chromate solution using sodium aluminate
It is essential to control silica levels in sodium chromate solution during the process of electrolytic synthesis of sodium dichromate. On the basis of previous work, the desilication conditions were systematically studied and pH was found to have the most serious impact on the desilication process. The desilication rate under optimal conditions obtained from the orthogonal experiment results ...
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Structure changes and water filtration properties of electrospun polyamide nanofibre membranes
Nanofibre membranes are studied extensively in water treatment. Inappropriate storage, however, could alter their performance, e.g. regarding water filtration. This shows the need for investigating this effect in more detail so as to offer a solution for long-term behaviour and stability. In this study, polyamide nanofibre membranes were treated under different conditions, simulating the ...
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One-step hydrothermal synthesis of CTAB-modified SiO2 for removal of bisphenol A
A stable SiO2 material marked as CTAB-Ms(x) was synthesized by a novel sol-gel method. It was modified with hexadecyl trimethyl ammonium bromide (CTAB), which resulted in high adsorption capacity. Its microstructure and surface functional groups were characterized by scanning electron microscope, transmission electron microscope and Fourier transform infrared. The results showed that ...
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Equilibrium, kinetics and process design of acid yellow 132 adsorption onto red pine sawdust
Linear and non-linear regression procedures have been applied to the Langmuir, Freundlich, Tempkin, Dubinin–Radushkevich, and Redlich–Peterson isotherms for adsorption of acid yellow 132 (AY132) dye onto red pine (Pinus resinosa) sawdust. The effects of parameters such as particle size, stirring rate, contact time, dye concentration, adsorption dose, pH, and temperature were ...
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