X-Ray Microanalysis with High Spatial Resolution and High Counts Rate with a State of the Art Field Emission Scanning Electron Microscope

In this study, monodispersed Tb3+ ions were successfully dispersed in the polyacrylonitrile (PAN) solution. Tb3+/PAN composite fibers were fabricated by electrospinning the PAN solutions containing different amount of Tb3+ ions. Further investigation showed that Tb3+ ions were homogeneously dispersed in the fibers individually. The composite fibers showed a uniform and continuous morphology. The as-spun fibers were characterized by Field Emission Scanning Electron Microscope (FE-SEM) and X-ray diffraction (XRD)

Download Full-text

Analisis Struktur Kristal dan Sifat Kemagnetan Material Komposit Perovskite Manganit Nd0,6Sr0,4MnO3/ZnO

Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics ◽

10.15408/fiziya.v3i1.16158 ◽

2020 ◽

Vol 3 (1) ◽

pp. 1-8

Author(s):

Muhammad Umar Faruqi ◽

Arif Tjahjono ◽

Sitti Ahmiatri Saptari

Keyword(s):

Electron Microscope ◽

Scanning Electron Microscope ◽

Field Emission ◽

Sol Gel ◽

Vibrating Sample Magnetometer ◽

X Ray Diffraction ◽

Space Group ◽

X Ray ◽

Characterization Test ◽

Scanning Electron

AbstrakPerovskite manganit merupakan salah satu rekayasa material yang dapat menghasilkan perubahan fenomena fisika. Telah berhasil dibuat material berbasis perovskite manganit Nd0,6Sr0,4MnO3 menggunakan metode sol-gel¬ dan dikompositkan dengan ZnO (Nd0,6Sr0,4MnO3)1-x/(ZnO)x (x = 0; 0,3; 0,5; 0,7). Hasil pengujian X-Ray Diffraction menunjukkan sampel Nd0,6Sr0,4MnO3 berstruktur tunggal ortorombik dan sampel ZnO pada (Nd0,6Sr0,4MnO3)0,5/(ZnO)0,5 berstruktur heksagonal tunggal. Hasil pengujian Field Emission Scanning Electron Microscope menunjukkan sampel telah homogen dengan rata-rata ukuran butir 0,188 μm. Hasil pengujian Vibrating Sample Magnetometer menunjukkan sampel (Nd0,6Sr0,4MnO3)0,5/(ZnO)0,5 bersifat paramagnetik dan mengalami penurunan sifat magnetik juga suseptibilitas seiring dengan penambahan konsentrasi material ZnO. AbstractPerovskite manganite is one of the manipulation materials that can produce changes in physical phenomena. Perovskite material Nd0,6Sr0,4MnO3 has been made with the sol-gel method and then composites with ZnO (Nd0.6Sr0.4MnO3)1-x/(ZnO)x (x = 0; 0.3; 0.5, 0, 7). The results of the X-Ray Diffraction characterization test showed samples of Nd0,6Sr0,4MnO3 and ZnO each with a single orthorhombic phase with a Pnma space group and a single hexagonal with a P63mc space group. The results of the Field Emission Scanning Electron Microscope characterization test showed that the samples were homogeneous with an average grain size of 0,188 μm. Vibrating Sample Magnetometer characterization test results show composite material (Nd0,6Sr0,4MnO3)1-x/(ZnO)x are paramagnetic and the increasing composition of ZnO material decreases the magnetization and susceptibility value of sample

Download Full-text

High Spatial Resolution Spin-Polarized Scanning Electron Microscope

Japanese Journal of Applied Physics ◽

10.1143/jjap.24.l833 ◽

1985 ◽

Vol 24 (Part 2, No. 10) ◽

pp. L833-L834 ◽

Cited By ~ 9

Author(s):

Kazuyuki Koike ◽

Hideo Matsuyama ◽

Hideo Todokoro ◽

Kazunobu Hayakawa

Keyword(s):

Electron Microscope ◽

Scanning Electron Microscope ◽

Spatial Resolution ◽

High Spatial Resolution ◽

Spin Polarized ◽

Scanning Electron

Download Full-text

X-ray detection performance of a 300KV field-emission Analytical Electron Microscope

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100147090 ◽

1993 ◽

Vol 51 ◽

pp. 250-251

Author(s):

C. E. Lyman ◽

J. I. Goldstein ◽

D.B. Williams ◽

D.W. Ackland ◽

S. von Harrach ◽

...

Keyword(s):

Electron Microscope ◽

Field Emission ◽

Spatial Resolution ◽

High Spatial Resolution ◽

Detection Performance ◽

Electron Gun ◽

X Rays ◽

X Ray ◽

Analytical Electron ◽

Analytical Electron Microscope

A major goal of analytical electron micrsocopy (AEM) is to detect small amounts of an element in a given matrix at high spatial resolution. While there is a tradeoff between low detection limit and high spatial resolution, a field emission electron gun allows detection of small amounts of an element at sub-lOnm spatial resolution. The minimum mass fraction of one element measured in another is proportional to [(P/B)·P]-1/2 where the peak-to-background ratio P/B and the peak intensity P both must be high to detect the smallest amount of an element. Thus, the x-ray detection performance of an analytical electron microscope may be characterized in terms of standardized measurements of peak-to-background, x-ray intensity, the level of spurious x-rays (hole count), and x-ray detector performance in terms of energy resolution and peak shape.This paper provides measurements of these parameters from Lehigh’s VG Microscopes HB-603 field emission AEM. This AEM was designed to provide the best x-ray detection possible.

Download Full-text

High spatial resolution scanning electron microscope: evaluation and structural analysis of nanostructured materials. Part 2

Analytics ◽

10.22184/2227-572x.2018.08.5.448.456 ◽

2018 ◽

Vol 8 (5) ◽

pp. 448-456

Author(s):

Osamu Terasaki ◽

Yanhang Ma ◽

Yuusuke Sakuda ◽

Hideyuki Takahashi ◽

Kenichi Tsutsumi ◽

...

Keyword(s):

Electron Microscope ◽

Structural Analysis ◽

Scanning Electron Microscope ◽

Nanostructured Materials ◽

Spatial Resolution ◽

High Spatial Resolution ◽

Scanning Electron

Download Full-text

STUDY OF MULTIELEMENTAL CONCENTRATIONS AND NANO-MICRO STRUCTURAL MORPHOLOGY IN MYRTACEAE FAMILY MEDICINAL PLANTS BY FIELD EMISSION SCANNING ELECTRON MICROSCOPE-ENERGY DISPERSIVE X-RAY SPECTROSCOPY METHOD

Asian Journal of Pharmaceutical and Clinical Research ◽

10.22159/ajpcr.2019.v12i2.29054 ◽

2019 ◽

pp. 432-435

Author(s):

TEERTHE SS ◽

KERUR BR

Keyword(s):

Trace Elements ◽

Electron Microscope ◽

Medicinal Plants ◽

Scanning Electron Microscope ◽

Field Emission ◽

Energy Dispersive ◽

World Health ◽

Structural Morphology ◽

X Ray ◽

Scanning Electron

Objective: The essential multielemental analysis was carried out in nano- and microscale surface morphology of two useful selected species of Myrtaceae family medicinal plants such as Eucalyptus and Guava using “field emission scanning electron microscope”–“energy dispersive X-ray spectroscopy” (FESEM-EDS). To understand the elemental analysis of medicinal plant used in Bidar, Gulbarga/Kalaburagi and Yadgir districts of the Northeast Karnataka region. Methods: In the present investigation, Myrtaceae family’s medicinal plants selected. The analysis of the samples were thorough nano-micro photograph obtained by using FESEM and specific weight percent of elemental concentration analyzed by EDX/EDS. Results: The elemental concentrations such as C, O, magnesium, Al, Si, S, Cl, K, Ca, Mn, Fe, Cu, and Zn were estimated in all the collected medicinal plants and found to be within the World Health Organization (WHO’s) recommended values. FESEM morphology indicates that fine plane irregularly shaped particles, with size an average diameter 200 nm–1 μm, are found in both plants. Conclusion: The Indian Traditional Medicinal Plants have been used as a potential source for general and therapeutic medicinal purposes, including as a home remedy, Ayurvedic, and herbal drugs for the treatment of different types of human diseases. The WHO established maximum permissible limits for the consumption of major, minor, and trace elements to ensure the safe uses of medicinal plants as a drug material so as to cure the diseases. The present investigation suggests that the collected medicinal plants have good alignments of secondary metabolites, functional groups, and intake of trace elements, which are useful for treatment and preparation of new Ayurvedic, herbal, and pharmaceutical drug, pellets of very small size for alignment of different diseases.

Download Full-text

Experimental study of petrophysical properties of a tight formation by considering the clay minerals and flow sensitivities

Earth Sciences Research Journal ◽

10.15446/esrj.v20n2.54508 ◽

2016 ◽

Vol 20 (2) ◽

pp. 1 ◽

Cited By ~ 2

Author(s):

Guangfen Liu ◽

Shoujun Li ◽

Daihong Gu ◽

Yang Lu ◽

Emmanuel Asamoah

Keyword(s):

Electron Microscope ◽

Scanning Electron Microscope ◽

Clay Minerals ◽

Field Emission ◽

Petrophysical Properties ◽

X Ray Diffraction ◽

Acid Sensitivity ◽

X Ray ◽

Scanning Electron ◽

Tight Formation

Quantitative X-ray diffraction analysis of rock, X-ray diffraction analysis of clay minerals types and components, Field Emission Scanning Electron Microscope (FESEM) and sensitivity flow experiments methods were used toresearch the effects of clay minerals on the porosity and permeability of Ordos Basin’s tight Chang 7 reservoir (Zhenbei area). These methods were also used to analyze the type, degree, and factors affecting reservoir sensitivity. The research showed that the reservoir possessed poor water, salt, and alkali sensitivity, poor to strong acid sensitivity and none to poor velocity sensitivity. Acid sensitivity among them had comparatively large differences, mainly because acid sensitivity was not only affected by chlorite but also by components of carbonate minerals. Stress sensitivity experiment results showed that the maximum degree of permeability damage in the rocks of this reservoir was median to very strong; irreversible damage level was weak to strong. Consequently, the experimental studies are favorable to not only determine the factor dominating the petrophysical properties of the tight formation, but also to optimize the follow-up development strategies, e.g. injection schedule and hydraulic fracturing implement. Estudio Experimental de las propiedades petrofísicas de una formación compacta al considerar las arcillas minerales y las respuestas de flujo ResumenEste trabajo utilizó análisis cuantitativos de rocas por difracción de rayos X, análisis de los tipos y componentes de arcillas minerales por difracción de rayos X, análisis con el microscopio electrónico de efecto de campo (FESEM, del inglés Field Emission Scanning Electron Microscope) y ensayos de respuesta de flujo para investigar los efectos de las arcillas minerales en la porosidad y permeabilidad del depósito Chang 7, en la cuenca del Ordos (región Zhenbei). Estos métodos también se utilizaron para analizar el tipo, el grado y los factores que afectan la respuesta del depósito. La investigación demuestra que el depósito posee poca agua, sal y respuesta alcalina, baja a fuerte respuesta de acidez, y ninguna a baja respuesta de velocidad. Entre estas características, la respuesta de acidez presentó grandes diferencias comparativas debido a que está afectada tanto por el clorito como por los componentes de minerales carbonatos. Los resultados de los ensayos de respuesta de tensión muestran que el máximo grado de daño por permeabilidad en las rocas del depósito es de mediano a muy fuerte; el nivel de daño irreversible va de débil hasta fuerte. Por lo tanto lo estudios experimentales son favorables no solo para determinar el factor dominante en las propiedades petrofísicas de la formación compacta sino también para optimizar las futuras estrategias de desarrollo, como una programación de las tareas de inyección y la implementación de la fractura hidráulica.

Download Full-text