Introduction to the Scanning Electron Microscope
David C Joy; Introduction to the Scanning Electron Microscope, Microscopy and Microanalysis, Volume 9, Issue S02, 1 August 2003, Pages 1556–1557, https://doi.or
Materials Literature
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Microwave Exfoliation of Vermiculite and Phlogopite
Abstract Vermiculites and phlogopites can be exfoliated by chemical and thermal treatment methods to obtain chemically inert, adsorbent, fire-resistant, low-density materials with excellent thermal and acoustic insulation properties. The water content of the clay generally determines the extent of exfoliation and the…
An Estimate of Carbon-14 Inventory at Wolsong Nuclear Power Plant in the Republic of Korea
In this paper, carbon-14 inventory of Wolsong Nuclear Power Plant (NPP) which has CANDU type reactors was estimated for 1984–2002. The carbon-14 inventory can be estimated based on a simple relation: [carbon-14 inventory]=[carbon-14 production]—[carbon-14 emission]. The second term can be calculated whereas the third…
A Study on the Action of Ozone and on the Thermal Stability of Nanodiamond
Ultradisperse detonation diamond (UDD), a nanodiamond having particle size around 4 nm has been treated with ozone in an aqueous slurry. The reaction kinetics appeared to be relatively slow and long ozonation times were needed in order to functionalize the surface of a special nanodiamond sample with a very low degree…
Preparation of ZnO Thin Films on Sapphire Substrates by Sol-Gel Method
ZnO films have been prepared on (0001) sapphire substrates by the sol-gel method from a 2-methoxyethanol solution of zinc acetate dihydrate stabilized by monoethanolamine. The structural properties of the films have been characterized by X-ray diffraction, compared with the films on silica glass substrates. The crysta…
Morphology and Crystallization Kinetics of Melt Miscible Polyolefin Blends
Abstract Blends of copolymers of ethylene/hexene (9 CH 3 /1 000 C) and ethylene/butene (77 CH 3 /1 000 C) synthesized with metallocene catalysts were prepared by co‐precipitation from solution. A phase diagram for this blend had been obtained in a preceding work, where the blends were found to be miscible in the melt…
Nanoscale Oxygen Generators: MgO2-Based Fillings of BN Nanotubes
Boron nitride (BN) nanotubes having only tens of nanometers in diameter and open tip-ends were uniformly filled with a MgO 2 -based material. The crystal structures and chemical compositions of the tubes and filling media were analyzed using high-resolution and energy-filtered electron microscopy, electron diffraction…
Characterization of extruded ethylene‐vinyl alcohol copolymer based barrier blends with interest in food packaging applications
Abstract Based on previous work a number of optimum extruded blends with high contents of a high barrier ethylene‐vinyl alcohol copolymer were selected and characterized in terms of phase morphology, water sorption and barrier properties. Blend components were an ethylene vinyl‐alcohol copolymer (EVOH with 32 mol% eth…
Ultrasonic disinfection of wastewater effluents for high-quality reuse
Cavitation, induced by ultrasound at low frequencies, is an effective means for the disintegration of bacterial cells. Two effects can be observed: at low ultrasound doses bacteria flocs can be declumped by mechanical shear stresses, and at increased doses ultrasound cavitation has an impact on the cell walls such tha…
Theory of local distortion in ErO6 cluster: Spontaneous symmetry reduction in lanthanoid octahedrons
Molecular orbital calculations for an ErO6 cluster predicted a stable C4v pseudo-octahedron with an Er displacement of ∼0.1 Å from the center of the octahedron with an Er–O bond length of 2.27 Å. In this particular configuration, the hybridization balance of O 2p–Er 6s with O 2p–Er 5d minimizes electron transfer from…
Dendrimers as luminescent hosts for metal cations and organic molecules
Dendrimers are multibranched compounds exhibiting a well-defined chemical structure with the possibility of encapsulating metal ions or organic molecules in their internal dynamic cavities. When the hosting dendrimer and/or the guest are luminescent, quenching/sensitization processes may occur that can be exploited fo…
Characterization of Microbially Fe(III)-Reduced Nontronite: Environmental Cell-Transmission Electron Microscopy Study
Abstract Microstructural changes induced by the microbial reduction of Fe(III) in nontronite by Shewanella oneidensis were studied using environmental cell (EC)-transmission electron microscopy (TEM), conventional TEM, and X-ray powder diffraction (XRD). Direct observations of clays by EC-TEM in their hydrated state a…
Electric fatigue in Pb(Nb,Zr,Sn,Ti)O3 thin films grown by a sol–gel process
Antiferroelectric Pb(Nb,Zr,Sn,Ti)O3 (PNZST) thin films were deposited via a sol–gel process on LaNiO3-buffered Pt/Ti/SiO2/Si substrates. The highly (100)-oriented LaNiO3 buffer layer facilitated the formation of high-quality PNZST films with a strong (100) preferred orientation. These films showed improved electric fa…
Phosphorus dendrimers: from synthesis to applications
Various methods of synthesis of phosphorus dendrimers are presented, in particular a fast method which allows creating each generation in only one step, while multiplying by 5 the number of end-groups. These methods of synthesis can easily be modified to place selectively on the surface, inside, within the branches or…
Influence of surface morphology on the wettability of cluster-assembled carbon films
We have evaluated the surface energy and characterized the wettability of cluster-assembled carbon films deposited on polyethylene, Si and Al substrates by a sessile-drop method using water and glycerol. The effective surface energy of nanostructured carbon is of the order of 30 mJ/m 2 as calculated using the Fowkes a…
Xanthates and related compounds as versatile agents in colloid science
Xanthates, thiocarbamates and trithiocarbonates are highly useful compounds in surface and colloid science and in the context of nanotechnology of particles, self-assembly and surfaces. Similar to thiols they have a strong affinity to metal and metal ion-containing surfaces and particles. However they are relatively r…
The negative-difference effect during the localized corrosion of magnesium and of the AZ91HP alloy
Galvanostatic tests with pure magnesium and with the AZ91HP alloy were performed in NaCl solutions, and the volume of hydrogen evolved during the tests was measured. In order to examine the negative-difference effect, a concept was developed to separate the hydrogen evolution (H.E.) on the passive surface and the H.E.…
Quantum Transport Effects in Nanosized Graphite Sheets. II. Enhanced Transport Effects by Heteroatoms
Quantum transport effects in various nanosized graphite sheets are studied on the basis of the Landauer model. To derive heteroatomic effects in quantum transport, nanosized graphite sheets that involve B, N, and O atoms are treated. Important rules for effective quantum transport are found: (I) two atoms connected wi…
Crystallization and Melting Behaviors of PPC‐BS/PVA Blends
Abstract The isothermal crystallization and melting behaviors of poly(propylene carbonate) end‐capped with benzenesulfonyl/poly(vinyl alcohol) (PPC‐BS/PVA) blends over rich PVA composition range were first investigated by differential scanning calorimetry (DSC). PPC‐BS/PVA interaction parameter, χ 12 , calculated from…
Analysis of Semiconductor Cluster Beam Polarization Taking Small Permanent Dipole Moments into Account
Abstract Deflections of semiconductor cluster beams in an inhomogeneous electric field deliver enhanced polarizabilities for cold isolated Ga N As M clusters with odd number of atoms n = N + M up to n =17. One speculated that the high polarizabilities result from their electronic open shell structure. This was qualita…