Scanning electron microscopy

Xem 1-20 trên 25 kết quả Scanning electron microscopy
  • Calcium carbonate scale inhibition in squeeze treatment by the phosphonate–type scale inhibitors, such as diethylenetriamine penta (methylene phosphonic acid) (DETPMP), ethylene diamine tetra(methyelne phosphonic acid) (EDTMP) or by the mixing of DETPMP, EDTMP and chelants (citric acid (CA), maleic acid (MA), ethylendiamintetraacetic acid (EDTA) has been studied in previous works [5,6].

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  • Tuyển tập các báo cáo nghiên cứu khoa học quốc tế về bệnh thú y đề tài: Site adaptations of Acanthogyrus (Acanthosentis) tilapiae: Observations through light and scanning electron microscopy

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  • Advances in nanotechnology over the past decade have made scanning electron microscopy (SEM) an indispensable and powerful tool for analyzing and constructing new nanomaterials. Development of nanomaterials requires advanced techniques and skills to attain higher quality images, understand nanostructures, and improve synthesis strategies. A number of advancements in SEM such as field emission guns, electron back scatter detection (EBSD), and X-ray element mapping have improved nanomaterials analysis.

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  • Progress in modern science is impossible without reliable tools for characterization of structural, physical, and chemical properties of materials and devices at the micro-, nano-, and atomic scale levels. While structural information can be obtained by such established techniques as scanning and transmission electron microscopy, high-resolution examination of local electronic structure, electric potential and chemical functionality is a much more daunting problem.

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  • Nanotips have been in increasing demand over the last two decades, owing to their crucial role in the main nanotechnology instruments, like scanning probe microscopes and scanning electron and transmission microscopes. Well-defined ultrasharp tips have also attracted a growing interest in molecular electronics, as they are needed for fabrication and characterization of molecular structures. In this chapter we present several methods that have been explored so far for fabricating such ultrasharp tips, with an emphasis on the most recent technique.

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  • The invention of scanning tunneling microscope (STM) by Binnig and his colleagues in 1982 opened up the possibility of imaging material surfaces with spatial resolution much superior to the conventional microscopy techniques. The STM is the first instrument capable of directly obtaining three-dimensional images of solid surfaces with atomic resolution. Even though STM is capable of achieving atomic resolution, it can only be used on electrical conductors. This limitation has led to the invention of atomic force microscope (AFM) by Binnig and his co-workers in 1986.

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  • Film coat quality Michael E.Aulton and Andrew M.Twitchell SUMMARY This chapter discusses the desirable properties of polymer film coats with respect to their end usage. The mechanical properties of films were discussed fully in Chapter 12 and so this chapter concentrates on other aspects of film quality such as gloss and roughness, uniformity of film thickness and defects such as cracking, edge splitting, picking, bridging and foam filling of intagliations, etc.

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  • Microscopic and imaging techniques: – Optical microscopy – Confocal microscopy – Electron microscopy (SEM and TEM, related methods) – Scanning probe microscopy (STM and AFM, related methods) Surface spectrometric techniques: – X-ray fluorescence (from electron microscopy) – Auger electron spectrometry – X-ray photoelectron spectrometry (XPS/UPS/ESCA)

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  • The aim of the study was to investigate the crystallization kinetics and solidification behaviour of Fe60Co8Mo5Zr10W2B15 bulk glass forming alloy. The solidification behaviour in near-equilibrium and non-equilibrium cooling conditions was studied. The eutectic and peritectic reactions were found to exist in the solidification sequence of the alloy. The bulk metallic glass formation was achieved by using two methods: quenching from the liquid state and quenching from the semi-state.

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  • Porous hydroxyapatite ceramic was synthesized by solid phase method using Ca(OH)2 and Ca3(PO4)2 at the temperature interval 200 - 350o C. The samples, after pelleting and sintering, were characterized by X-ray diffractometry (XRD), Fourier transform infra-red spectroscopy (FTIR), scanning electron microscopy (SEM) and thermal gravimetric analysis (TGA). Porous structure of hydroxyapatite was obtained with the 42 – 55% porosity.

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  • Ju Park et al. Nanoscale Research Letters 2011, 6:223 NANO EXPRESS Open Access Optimal synthesis and characterization of Ag nanofluids by electrical explosion of wires in liquids Eun Ju Park1, Seung Won Lee2, In Cheol Bang2, Hyung Wook Park1* Abstract Silver nanoparticles were produced by electrical explosion of wires in liquids with no additive. In this study, we optimized the fabrication method and examined the effects of manufacturing process parameters.

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  • Zhou et al. Nanoscale Research Letters 2011, 6:364 NANO EXPRESS Open Access Electro-synthesis of novel nanostructured PEDOT films and their application as catalyst support Cuifeng Zhou1, Zongwen Liu1*, Yushan Yan2, Xusheng Du3*, Yiu-Wing Mai3 and Simon Ringer1 Abstract Poly(3,4-ethylenedioxythiophene) (PEDOT) films doped with nitric and chlorine ions have been electrochemically deposited simply by a one-step electrochemical method in an aqueous media in the absence of any surfactant.

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  • Alubaidy et al. Nanoscale Research Letters 2011, 6:375 NANO EXPRESS Open Access Synthesis of magnetic nanofibers using femtosecond laser material processing in air Mohammed-Amin Alubaidy1, Krishnan Venkatakrishnan1* and Bo Tan2 Abstract In this study, we report formation of weblike fibrous nanostructure and nanoparticles of magnetic neodymiumiron-boron (NdFeB) via femtosecond laser radiation at MHz pulse repetition frequency in air at atmospheric pressure.

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  • Thin sections and polished sections of the mortars were prepared in an impregnation unit under vacuum with an epoxy resin. These were polished with 15 μm Al2O3 abrasive and the final lapping was performed with diamond pastes (15–1 μm). Thin-sections were analysed by light polarized microscopy using a petrographic polarizing Olympus BH2 microscope equipped with an Olympus DP-10 digital camera.

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  • .Lecture Notes in Earth Sciences Editors: S. Bhattacharji, Brooklyn G. M. Friedman, Brooklyn and Troy H. J. Neugebauer, Bonn A. Seilacher, Tuebingen anThis book represents the author's doctorals thesis. Therefore, although it is a monograph, it represents the results of numerous discussions and cooperations. First of all I am grateful to Christian Dullo (GEOMAR, Kiel/Germany) for supervising my work on this thesis, for valuable suggestions, and for providing support whenever I...

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  • This paper present the results of research on designing mold for vacuum infusion technique for preparation the polymer composite material. Specimens of varrious methods of vacuum technique have been prepared and their mechanical and structural properties have been studied. The results show that material obtained from vacuum assisted technique have a preciously mechanical properties, increased in average 45% in comparison with hand lay up method. The scanning electronic microscopy has been used for investigation on void appearance of composite materials.

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  • Catalytic oxidation of m-xylene was carried out over the copper oxide catalyst loaded on SiO2 300 m2/g. The various techniques were used to characterize the catalysts x-ray diffraction, TPRH2, N2 adsorption-desorption, scanning electron microscopy (SEM), tranmission electron microscopy (TEM) and CO pulse chemisorptions. The results indicate that the impregnated solution concentration exerts an influence on the catalytic activity.

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  • Lead dioxide has been electrodeposited onto 304 stainless steel in three-solution with different compound and pH by ganvanostatic method. The X-Ray diffraction and scanning electron microscopy (SEM) techniques have been used to determine morphologic structure of lead dioxide. The obtained results have shown that lead dioxide has two forms crystal and, the faradic yield of electrodeposition process lead dioxide in the acid and alkali solution is more than in the neutral solution.

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  • It was the first time that zeolite NaY with the SiO2/Al2O3 ratio of 3.8 was synthesized from phlogopite taken in Yen Bai of Vietnam in the presence of organic complex, NaOH and liquid glass. Synthesized samples were characterized by X-ray diffraction (XRD), Infrared lattice vibration (IR), scanning electron microscopy (SEM), differential thermal analysis (DTA), thermogravimetric analysis (TGA) and Surface area by BET technique. The obtained results showed that the synthesized samples were well crystallized.

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  • The HN-06 compound was found as compatibilizer for natural rubber (NR)-chloroprene rubber (CR) blend. The blend containing 0.8 wt% HN-06 compound gave good compatibility and it can be observed by scanning electron microscopy (SEM) image of two rubbers layer’s interface. Blend of NR/CR/HN-06 = 70/30/0.8 wt% have high mechanical properties the tensile strength 25.1 MPa, the tear strength 43.1 N/mm, the abrasion loss 0.044 g, good ozone and oil resistance.

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