scholarly journals Development of an in-situ SEOP 3 He Neutron Spin Filter for Magnetic Imaging Techniques

2017 ◽  
Vol 88 ◽  
pp. 231-236 ◽  
Author(s):  
H. Hayashida ◽  
K. Hiroi ◽  
T. Oku ◽  
H. Kira ◽  
K. Sakai ◽  
...  
Keyword(s):  
Imaging Techniques ◽  
Neutron Spin ◽  
Spin Filter ◽  
Magnetic Imaging

In situ SEOP polarised 3He neutron spin filter for incident beam polarisation and polarisation analysis on neutron scattering instruments

2009 ◽  
Vol 404 (17) ◽  
pp. 2659-2662 ◽  
Author(s):  
S. Boag ◽  
E. Babcock ◽  
K.H. Andersen ◽  
M. Becker ◽  
T.R. Charlton ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Incident Beam ◽  
Neutron Spin ◽  
Spin Filter ◽  
Polarisation Analysis ◽  
Beam Polarisation

Development of a compact in situ polarized 3He neutron spin filter at Oak Ridge National Laboratory

2014 ◽  
Vol 85 (7) ◽  
pp. 075112 ◽  
Author(s):  
C. Y. Jiang ◽  
X. Tong ◽  
D. R. Brown ◽  
S. Chi ◽  
A. D. Christianson ◽  
...  
Keyword(s):  
National Laboratory ◽  
Neutron Spin ◽  
Spin Filter ◽  
Oak Ridge ◽  
Oak Ridge National Laboratory

scholarly journals Nanoscale magnetic imaging of ferritins in a single cell

2019 ◽  
Vol 5 (4) ◽  
pp. eaau8038 ◽  
Author(s):  
Pengfei Wang ◽  
Sanyou Chen ◽  
Maosen Guo ◽  
Shijie Peng ◽  
Mengqi Wang ◽  
...  
Keyword(s):  
Single Cell ◽  
Imaging Techniques ◽  
Nitrogen Vacancy ◽  
Nanometer Scale ◽  
Magnetic Imaging ◽  
Intracellular Proteins ◽  
Nv Center ◽  
A Cell ◽  
Endogenous Proteins

The in situ measurement of the distribution of biomolecules inside a cell is one of the important goals in life science. Among various imaging techniques, magnetic imaging (MI) based on the nitrogen-vacancy (NV) center in diamond provides a powerful tool for the biomolecular research, while the nanometer-scale MI of intracellular proteins remains a challenge. Here, we use ferritin as a demonstration to realize the MI of endogenous proteins in a single cell using the NV center as the sensor. With the scanning, intracellular ferritins are imaged with a spatial resolution of ca. 10 nm, and ferritin-containing organelles are colocalized by correlative MI and electron microscopy. The approach paves the way for nanoscale MI of intracellular proteins.

scholarly journals Quantum magnetic imaging of iron organelles within the pigeon cochlea

2021 ◽  
Vol 118 (47) ◽  
pp. e2112749118
Author(s):  
Robert W. de Gille ◽  
Julia M. McCoey ◽  
Liam T. Hall ◽  
Jean-Philippe Tetienne ◽  
E. Pascal Malkemper ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Magnetic Particle ◽  
Imaging Techniques ◽  
Iron Storage ◽  
Magnetic Imaging ◽  
Geomagnetic Fields ◽  
The Individual ◽  
Individual Particles

The ability of pigeons to sense geomagnetic fields has been conclusively established despite a notable lack of determination of the underlying biophysical mechanisms. Quasi-spherical iron organelles previously termed “cuticulosomes” in the cochlea of pigeons have potential relevance to magnetoreception due to their location and iron composition; however, data regarding the magnetic susceptibility of these structures are currently limited. Here quantum magnetic imaging techniques are applied to characterize the magnetic properties of individual iron cuticulosomes in situ. The stray magnetic fields emanating from cuticulosomes are mapped and compared to a detailed analytical model to provide an estimate of the magnetic susceptibility of the individual particles. The images reveal the presence of superparamagnetic and ferrimagnetic domains within individual cuticulosomes and magnetic susceptibilities within the range 0.029 to 0.22. These results provide insights into the elusive physiological roles of cuticulosomes. The susceptibilities measured are not consistent with a torque-based model of magnetoreception, placing iron storage and stereocilia stabilization as the two leading putative cuticulosome functions. This work establishes quantum magnetic imaging as an important tool to complement the existing array of techniques used to screen for potential magnetic particle–based magnetoreceptor candidates.

scholarly journals Magnetic Shield Design of In-situ SEOP Polarized 3He Neutron Spin Filter System

2013 ◽  
Vol 42 ◽  
pp. 200-205 ◽  
Author(s):  
H. Kira ◽  
Y. Sakaguchi ◽  
J. Suzuki ◽  
T. Oku ◽  
M. Nakamura ◽  
...  
Keyword(s):  
Neutron Spin ◽  
Spin Filter ◽  
Magnetic Shield ◽  
Filter System ◽  
Shield Design

scholarly journals Developments of In-Situ SEOP Polarized3He Neutron Spin Filter in Japan

2011 ◽  
Vol 294 ◽  
pp. 012014 ◽  
Author(s):  
H Kira ◽  
Y Sakaguchi ◽  
T Oku ◽  
J Suzuki ◽  
M Nakamura ◽  
...  
Keyword(s):  
Neutron Spin ◽  
Spin Filter

Coherent electron nanodiffraction from clean silver nano particles in a UHV STEM

1993 ◽  
Vol 51 ◽  
pp. 1058-1059
Author(s):  
J. Liu ◽  
M. Pan ◽  
G. E. Spinnler
Keyword(s):  
Supported Catalysts ◽  
Imaging Techniques ◽  
Nano Particles ◽  
Metal Particles ◽  
Shape Structure ◽  
Dynamical Simulations ◽  
Small Metal Particles ◽  
Extract Information

Small metal particles have peculiar chemical and physical properties as compared to bulk materials. They are especially important in catalysis since metal particles are common constituents of supported catalysts. The structural characterization of small particles is of primary importance for the understanding of structure-catalytic activity relationships. The shape and size of metal particles larger than approximately 5 nm in diameter can be determined by several imaging techniques. It is difficult, however, to deduce the shape of smaller metal particles. Coherent electron nanodiffraction (CEND) patterns from nano particles contain information about the particle size, shape, structure and defects etc. As part of an on-going program of STEM characterization of supported catalysts we report some preliminary results of CEND study of Ag nano particles, deposited in situ in a UHV STEM instrument, and compare the experimental results with full dynamical simulations in order to extract information about the shape of Ag nano particles.

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