Quantitative analysis of interaction between domain walls and magnetic nanoparticles

2011 ◽  
Vol 109 (7) ◽  
pp. 07D506 ◽  
Author(s):  
Todd Klein ◽  
Daniel Dorroh ◽  
Yuanpeng Li ◽  
Jian-Ping Wang
Keyword(s):  
Quantitative Analysis ◽  
Magnetic Nanoparticles ◽  
Domain Walls

scholarly journals Simulations of super-structure domain walls in two dimensional assemblies of magnetic nanoparticles

2015 ◽  
Vol 118 (4) ◽  
pp. 043901 ◽  
Author(s):  
J. Jordanovic ◽  
M. Beleggia ◽  
J. Schiøtz ◽  
C. Frandsen
Keyword(s):  
Magnetic Nanoparticles ◽  
Domain Walls ◽  
Two Dimensional ◽  
Super Structure ◽  
Structure Domain

scholarly journals Quantitative analysis of the direct piezoelectric response of bismuth ferrite films by scanning probe microscopy

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Kento Kariya ◽  
Takeshi Yoshimura ◽  
Katsuya Ujimoto ◽  
Norifumi Fujimura
Keyword(s):  
Quantitative Analysis ◽  
Domain Structure ◽  
Scanning Probe Microscopy ◽  
Domain Walls ◽  
Piezoelectric Properties ◽  
Bismuth Ferrite ◽  
Scanning Probe ◽  
Piezoelectric Response ◽  
Probe Microscopy ◽  
Piezoelectric Force Microscopy

AbstractPolarisation domain structure is a microstructure specific to ferroelectrics and plays a role in their various fascinating characteristics. The piezoelectric properties of ferroelectrics are influenced by the domain wall contribution. This study provides a direct observation of the contribution of domain walls to the direct piezoelectric response of bismuth ferrite (BiFeO3) films, which have been widely studied as lead-free piezoelectrics. To achieve this purpose, we developed a scanning probe microscopy-based measurement technique, termed direct piezoelectric response microscopy (DPRM), to observe the domain structure of BiFeO3 films via the direct piezoelectric response. Quantitative analysis of the direct piezoelectric response obtained by DPRM, detailed analysis of the domain structure by conventional piezoelectric force microscopy, and microscopic characterisation of the direct piezoelectric properties of BiFeO3 films with different domain structures revealed that their direct piezoelectric response is enhanced by the walls between the domains of spontaneous polarisation in the same out-of-plane direction.

Quantitative Analysis on Cellular Uptake of Clustered Ferrite Magnetic Nanoparticles

2019 ◽  
Vol 15 (4) ◽  
pp. 471-480
Author(s):  
Yu Jin Kim ◽  
Bum Chul Park ◽  
Young Soo Choi ◽  
Min Jun Ko ◽  
Young Keun Kim
Keyword(s):  
Quantitative Analysis ◽  
Magnetic Nanoparticles ◽  
Cellular Uptake

Interaction of Domain Walls and Magnetic Nanoparticles in Giant Magnetoresistive Nanostrips for Biological Applications

2013 ◽  
Vol 49 (7) ◽  
pp. 3414-3417 ◽  
Author(s):  
Todd Klein ◽  
Jonathan Lee ◽  
Wei Wang ◽  
Tofizur Rahman ◽  
Rachel Isaksson Vogel ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Domain Walls ◽  
Biological Applications

scholarly journals The Preparation of Glucan-Fe3O4Magnetic Nanoparticles and Its In Vivo Distribution in Mice

2014 ◽  
Vol 2014 ◽  
pp. 1-4 ◽  
Author(s):  
Fengdan Jin
Keyword(s):  
Quantitative Analysis ◽  
Magnetic Nanoparticles ◽  
Low Temperature ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Absorption Spectrometry ◽  
Analysis Method ◽  
In Vivo Distribution ◽  
Quantitative Analysis Method

The glucan-Fe3O4magnetic nanoparticles were prepared by hydrothermal method. The mixture of FeCl2and glucan was stirred vigorously for half an hour under low temperature (15°C). KOH of 1 mol/L was dropwise added, slowly, into the solution until the pH to 12. Immediately, KNO3was added and the temperature was raised to 75°C for an hour. All the processes of Fe3O4crystal particles generation were under nitrogen. An atomic absorption spectrometry quantitative analysis method was built to determine the in vivo distribution of the glucan-Fe3O4magnetic nanoparticles in mice. The diameter of glucan-Fe3O4magnetic nanoparticles was about 25 nm and they were up taken by the liver primarily after intravenous administration via the tail.

An Improved Quantitative Image Analyser

1977 ◽  
Vol 35 ◽  
pp. 226-227
Author(s):  
J.P. Fallon ◽  
P.J. Gregory ◽  
C.J. Taylor
Keyword(s):  
Feature Extraction ◽  
Quantitative Analysis ◽  
Frequency Content ◽  
General Sense ◽  
Physical Measurements ◽  
Quantitative Image ◽  
Image Analyser ◽  
Automatic Methods ◽  
Quantitative Results

Quantitative image analysis systems have been used for several years in research and quality control applications in various fields including metallurgy and medicine. The technique has been applied as an extension of subjective microscopy to problems requiring quantitative results and which are amenable to automatic methods of interpretation.Feature extraction. In the most general sense, a feature can be defined as a portion of the image which differs in some consistent way from the background. A feature may be characterized by the density difference between itself and the background, by an edge gradient, or by the spatial frequency content (texture) within its boundaries. The task of feature extraction includes recognition of features and encoding of the associated information for quantitative analysis.Quantitative Analysis. Quantitative analysis is the determination of one or more physical measurements of each feature. These measurements may be straightforward ones such as area, length, or perimeter, or more complex stereological measurements such as convex perimeter or Feret's diameter.

Quantification of Silica Uptake by Alveolar Macrophages - An Emperical Scanning Electron Microprobe Method

1982 ◽  
Vol 40 ◽  
pp. 332-333
Author(s):  
V. V. Damiano ◽  
R. P. Daniele ◽  
H. T. Tucker ◽  
J. H. Dauber
Keyword(s):  
Quantitative Analysis ◽  
Alveolar Macrophages ◽  
Bulk Sample ◽  
Silica Particles ◽  
Empirical Method ◽  
Phagocytic Cells ◽  
Calibration Standards ◽  
X Ray ◽  
Accurate Quantitative Analysis ◽  
Scanning Electron

An important example of intracellular particles is encountered in silicosis where alveolar macrophages ingest inspired silica particles. The quantitation of the silica uptake by these cells may be a potentially useful method for monitoring silica exposure. Accurate quantitative analysis of ingested silica by phagocytic cells is difficult because the particles are frequently small, irregularly shaped and cannot be visualized within the cells. Semiquantitative methods which make use of particles of known size, shape and composition as calibration standards may be the most direct and simplest approach to undertake. The present paper describes an empirical method in which glass microspheres were used as a model to show how the ratio of the silicon Kα peak X-ray intensity from the microspheres to that of a bulk sample of the same composition correlated to the mass of the microsphere contained within the cell. Irregular shaped silica particles were also analyzed and a calibration curve was generated from these data.

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