scholarly journals Mechanical Manipulation of a Fiber‐Optical Microprobe Fabricated from Oxide Glasses with Magnetic Force Response

2021 ◽  
pp. 2000100
Author(s):  
Yicong Ding ◽  
Katsuhisa Tanaka ◽  
Lothar Wondraczek
Keyword(s):  
Magnetic Force ◽  
Oxide Glasses ◽  
Force Response ◽  
Fiber Optical ◽  
Mechanical Manipulation

scholarly journals Magnetic Nanoprobes for Spatio-Mechanical Manipulation in Single Cells

2021 ◽  
Author(s):  
Iuliia P Dr. Novoselova ◽  
Andreas Neusch ◽  
Julia-Sarita Brand ◽  
Marius Otten ◽  
Mohammad Reza Safari ◽  
...  
Keyword(s):  
Magnetic Force ◽  
Single Cells ◽  
Nano Particles ◽  
Magnetic Response ◽  
Force Response ◽  
Non Invasive ◽  
Remote Manipulation ◽  
Structure Surface ◽  
Spatial Redistribution ◽  
A Cell

Magnetic nanoparticles (MNPs) are widely known as valuable agents for biomedical ap-plications. Yet, for their successful application within cells they need to fulfill a variety of demands such as monodispersity, biocompatibility or sufficient magnetic response. Given these prerequisites, MNPs may be used for remote, non-invasive manipulation, where their spatial redistribution or force response in a magnetic field provides a fine-tunable stimulus to a cell. Here, we investigate the properties of two different MNPs and their suitability for spatio-mechanical manipulations: sem-isynthetic magnetoferritin nanoparticles and fully synthetic nanoflower-shaped iron-oxide nano-particles. Next to characterizing their structure, surface potential and magnetic response, we monitor the MNP performance in a living cell environment using fluorescence microscopy and confirm their biocompatibility. We then demonstrate their capability to spatially redistribute and to respond to magnetic force gradients inside a cell. Our remote manipulation assays present these tailored mag-netic materials as suitable agents for applications in magnetogenetics, biomedicine or nanomaterial research.

scholarly journals Mechanical manipulation of magnetic nanoparticles by magnetic force microscopy

2017 ◽  
Vol 443 ◽  
pp. 184-189 ◽  
Author(s):  
Jinyun Liu ◽  
Wenxiao Zhang ◽  
Yiquan Li ◽  
Hanxing Zhu ◽  
Renxi Qiu ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Magnetic Force Microscopy ◽  
Magnetic Force ◽  
Force Microscopy ◽  
Mechanical Manipulation

scholarly journals Magnetic Nanoprobes for Spatio-Mechanical Manipulation in Single Cells

Nanomaterials ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2267
Author(s):  
Iuliia P. Novoselova ◽  
Andreas Neusch ◽  
Julia-Sarita Brand ◽  
Marius Otten ◽  
Mohammad Reza Safari ◽  
...  
Keyword(s):  
Biomedical Applications ◽  
Magnetic Force ◽  
Single Cells ◽  
Magnetic Response ◽  
Force Response ◽  
Non Invasive ◽  
Remote Manipulation ◽  
Structure Surface ◽  
Spatial Redistribution ◽  
A Cell

Magnetic nanoparticles (MNPs) are widely known as valuable agents for biomedical applications. Recently, MNPs were further suggested to be used for a remote and non-invasive manipulation, where their spatial redistribution or force response in a magnetic field provides a fine-tunable stimulus to a cell. Here, we investigated the properties of two different MNPs and assessed their suitability for spatio-mechanical manipulations: semisynthetic magnetoferritin nanoparticles and fully synthetic ‘nanoflower’-shaped iron oxide nanoparticles. As well as confirming their monodispersity in terms of structure, surface potential, and magnetic response, we monitored the MNP performance in a living cell environment using fluorescence microscopy and asserted their biocompatibility. We then demonstrated facilitated spatial redistribution of magnetoferritin compared to ‘nanoflower’-NPs after microinjection, and a higher magnetic force response of these NPs compared to magnetoferritin inside a cell. Our remote manipulation assays present these tailored magnetic materials as suitable agents for applications in magnetogenetics, biomedicine, or nanomaterial research.

TEM studies of amorphization processes and amorphous structures

1988 ◽  
Vol 46 ◽  
pp. 448-449
Author(s):  
T. E. Mitchell ◽  
R. B. Schwarz
Keyword(s):  
Amorphous Materials ◽  
Fission Products ◽  
Rapid Quenching ◽  
Surface Films ◽  
List Type ◽  
Oxide Glasses ◽  
Crystalline Materials ◽  
Amorphous Structures ◽  
Amorphous Surface ◽  
Interfacial Films

Traditional oxide glasses occur naturally as obsidian and can be made easily by suitable cooling histories. In the past 30 years, a variety of techniques have been discovered which amorphize normally crystalline materials such as metals. These include [1-3]:Rapid quenching from the vapor phase.Rapid quenching from the liquid phase.Electrodeposition of certain alloys, e.g. Fe-P.Oxidation of crystals to produce amorphous surface oxide layers.Interdiffusion of two pure crystalline metals.Hydrogen-induced vitrification of an intermetal1ic.Mechanical alloying and ball-milling of intermetal lie compounds.Irradiation processes of all kinds using ions, electrons, neutrons, and fission products.We offer here some general comments on the use of TEM to study these materials and give some particular examples of such studies.Thin specimens can be prepared from bulk homogeneous materials in the usual way. Most often, however, amorphous materials are in the form of surface films or interfacial films with different chemistry from the substrates.

Parasitic element influence on laser driver performances for 1.3 μm fiber optical communication

1993 ◽  
Vol 3 (9) ◽  
pp. 1751-1759 ◽  
Author(s):  
N. Hassaine ◽  
K. Sauv ◽  
A. Konczykowska ◽  
R. Lefevre
Keyword(s):  
Optical Communication ◽  
Parasitic Element ◽  
Laser Driver ◽  
Fiber Optical ◽  
Fiber Optical Communication

Influence of unbalanced magnetic force on shaft deflection in permanent magnet synchronous motor with fractional slot concentrated windings

2020 ◽  
Vol 64 (1-4) ◽  
pp. 1461-1468
Author(s):  
Ting Dong ◽  
Juyan Huang ◽  
Bing Peng ◽  
Ling Jian
Keyword(s):  
Permanent Magnet ◽  
Magnetic Force ◽  
Permanent Magnet Synchronous Motor ◽  
Operational Reliability ◽  
Topology Structure ◽  
Permanent Magnet Synchronous Motors ◽  
Synchronous Motors ◽  
Shaft Deflection ◽  
Large Length ◽  
Fractional Slot

The calculation accuracy of unbalanced magnetic forces (UMF) is very important to the design of rotor length, because it will effect the shaft deflection. But in some permanent magnet synchronous motors (PMSMs) with fractional slot concentrated windings (FSCW), the UMF caused by asymmetrical stator topology structure is not considered in the existing deflection calculation, which is very fatal for the operational reliability, especially for the PMSMs with the large length-diameter ratio, such as submersible PMSMs. Therefore, the part of UMF in the asymmetrical stator topology structure PMSMs caused by the choice of pole-slot combinations is analysized in this paper, and a more accurate rotor deflection calculation method is also proposed.

Modelling Light Transmission in a Fiber-Optical Reflection System

2004 ◽  
Vol 9 (1) ◽  
pp. 55-63
Author(s):  
V. Kleiza
Keyword(s):  
Optical Sensors ◽  
Light Transmission ◽  
External Cavity ◽  
Linear Displacement ◽  
Fiber System ◽  
Light Emitting ◽  
Optical Media ◽  
Reflected Light ◽  
Fiber Optical ◽  
Fiber Optical Sensors

Light transmission in the reflection fiber system, located in external optical media, has been investigated for application as sensors. The system was simulated by different models, including external cavity parameters such as the distance between light emitting and receiving fibers and mirror positioning distance. The sensitivity to a linear displacement of the sensors was studied as a function of the distance between the tips of the light emitting fiber and the center of the pair reflected light collecting fibers, by positioning a mirror. Physical fundamentals and operating principles of the advanced fiber optical sensors were revealed.

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