scholarly journals Progress of Scanning Electron Microscopy (SEM) and Electron Probe Microanalysis (EPMA) for Pulp and Paper Specimens. (Part II). Observation at High Magnification by Using Field Emission-SEM (FE-SEM) and Atomic Force Microscope (AFM).

1999 ◽  
Vol 53 (7) ◽  
pp. 901-912
Author(s):  
Tadahira Hamada
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Atomic Force Microscope ◽  
Field Emission ◽  
Electron Probe Microanalysis ◽  
Electron Probe ◽  
Pulp And Paper ◽  
High Magnification ◽  
Atomic Force ◽  
Scanning Electron

Comparative Study of Field Emission-Scanning Electron Microscopy and Atomic Force Microscopy to Assess Self-assembled Monolayer Coverage on Any Type of Substrate

1999 ◽  
Vol 5 (6) ◽  
pp. 413-419 ◽  
Author(s):  
Bernardo R.A. Neves ◽  
Michael E. Salmon ◽  
Phillip E. Russell ◽  
E. Barry Troughton
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Atomic Force Microscopy ◽  
Comparative Study ◽  
Field Emission ◽  
Self Assembled Monolayer ◽  
Force Microscopy ◽  
Atomic Force ◽  
Self Assembled ◽  
Scanning Electron

Abstract: In this work, we show how field emission–scanning electron microscopy (FE-SEM) can be a useful tool for the study of self-assembled monolayer systems. We have carried out a comparative study using FE-SEM and atomic force microscopy (AFM) to assess the morphology and coverage of self-assembled monolayers (SAM) on different substrates. The results show that FE-SEM images present the same qualitative information obtained by AFM images when the SAM is deposited on a smooth substrate (e.g., mica). Further experiments with rough substrates (e.g., Al grains on glass) show that FE-SEM is capable of unambiguously identifying SAMs on any type of substrate, whereas AFM has significant difficulties in identifying SAMs on rough surfaces.

scholarly journals GREEN TECHNOLOGY MEDIATED SYNTHESIS OF SILVER NANOPARTICLES FROM MOMORDICA CHARANTIA FRUIT EXTRACT AND ITS BACTERICIDAL ACTIVITY

2017 ◽  
Vol 10 (3) ◽  
pp. 196 ◽  
Author(s):  
S C Joshi ◽  
Utkarsh Kaushik ◽  
Aproova Upadhyaya ◽  
Priyanka Sharma
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Silver Nanoparticles ◽  
Atomic Force Microscope ◽  
Momordica Charantia ◽  
Diffusion Method ◽  
Fruit Extract ◽  
Atomic Force ◽  
Vis Spectroscopy ◽  
Scanning Electron

ABSTRACTObjective: The synthesis of nanoparticles from biological processes is evolving a new era of research interests in nanotechnology. Silver nanoparticlesare usually synthesized by chemicals and physical method, which are quite toxic and flammable in nature. This study deals with an environmentfriendly biosynthesis process of antibacterial silver nanoparticles using Momordica charantia fruit.Methods: AgNO3 (5 mM) was allowed to react with fruit extract of M. charantia. Biosynthesis of AgNPs was optimized by changing temperature,pH, and solvent. The silver nanoparticles so formed were characterized using ultraviolet-visible (UV-VIS) spectroscopy, Fourier transform infraredspectroscopy (FTIR), dynamic light scattering (DLS), atomic force microscope (AFM), and scanning electron microscopy (SEM).Results: UV-VIS spectra show absorption peak between 420 and 430 nm. The FTIR analysis showed the alcoholic, lactam, and nitro group presentin the plant extract, which were responsible for the reduction in AgNPs. The SEM images showed the size distribution of the nanoparticles and theaverage size was found to be 50-100 nm. By DLS analysis and AFM analysis, average sizes of the silver nanoparticles were of 150 nm. The results ofthese analyses confirmed the formation of silver nanoparticles. Silver nanoparticles were tested against Bacillus cereus and Staphylococcus epidermidisstrains using disc diffusion method and were found to be effective.Conclusion: Silver nanoparticles so synthesized in this study using fruit extract of M. charantia are simple, easy, and effective technique of nanoparticlesproduction.Keywords: Silver nanoparticles, Momordica charantia, Optimization, Antibacterial, Atomic force microscope, Scanning electron microscopy.

FACET PREPARATION OF SILICON NANO-WAVEGUIDES BY CLEAVING THE SOI CHIP

2011 ◽  
Vol 20 (04) ◽  
pp. 509-523 ◽  
Author(s):  
SHAIMAA MAHDI ◽  
MORITZ GREHN ◽  
AWS AL-SAADI ◽  
MICHAEL HÖFNER ◽  
STEFAN MEISTER ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Atomic Force Microscope ◽  
Optical Transmission ◽  
Silicon On Insulator ◽  
Atomic Force ◽  
Telecommunication Wavelength ◽  
Facet Surface ◽  
Fs Laser ◽  
Scanning Electron

Optical facet preparation of silicon-on-insulator (SOI) waveguides was done by polishing after saw dicing or cleaving after two different techniques of scoring by a mechanical saw and fs-laser. Cleaving after fs-laser scoring leads to smooth facet surface of air covered SOI waveguides; polishing after dicing is more efficient with SiO2covered waveguides. The prepared end facets were investigated using an atomic force microscope (AFM) and scanning electron microscopy (SEM). The SOI waveguides were characterized by optical transmission of telecommunication wavelength (1.5 μm).

Dentin in Severe Fluorosis: a Quantitative Histochemical Study

2007 ◽  
Vol 86 (9) ◽  
pp. 857-861 ◽  
Author(s):  
F. Rojas-Sánchez ◽  
M. Alaminos ◽  
A. Campos ◽  
H. Rivera ◽  
M.C. Sánchez-Quevedo
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Dental Caries ◽  
Electron Probe Microanalysis ◽  
Electron Probe ◽  
Histochemical Study ◽  
Fluoride Exposure ◽  
Quantitative Electron Probe Microanalysis ◽  
Scanning Electron

Dentin responds to different alterations in the enamel with hypermineralization, and is a biomarker of fluoride exposure. We hypothesized that severe fluorosis would lead to hypermineralization of the dentin when the enamel was severely affected. We used scanning electron microscopy and quantitative electron-probe microanalysis to compare dentin and enamel from healthy and fluorotic teeth. The dentin in fluorotic teeth was characterized by a highly mineralized sclerotic pattern, in comparison with control teeth (p < 0.001) and fluorotic enamel lesions (p < 0.001). Enamel near the lesions showed hypercalcification in comparison with dentin (p < 0.001). In response to the effects of severe fluorosis in the enamel, the dentin showed hypermineralization, as found in other enamel disorders. The hypermineralization response of the dentin in our samples suggests that the mechanism of the response should be taken into account in dental caries and other dental disorders associated with severe fluorosis.

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