Surface Magnetism Analysis
Surface Magnetism Analysis - Related Videos
07:55
Analyzing Cell Surface Adhesion Remodeling in Response to Mechanical Tension Using Magnetic Beads
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Cited by 3 •
2017
Cell surface adhesions are central in mechanotransduction, as they transmit mechanical tension and initiate the signaling pathways involved in tissue homeostasis and development. Here, we present a protocol for dissecting the biochemical pathways that are activated in response to tension, using ligand-coated magnetic microbeads and force application to adhesion receptors.
14:11
Quantification of Hydrogen Concentrations in Surface and Interface Layers and Bulk Materials through Depth Profiling with Nuclear Reaction Analysis
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Cited by 21 •
2016
We illustrate the application of 1H(15N,αγ)12C resonant nuclear reaction analysis (NRA) to quantitatively evaluate the density of hydrogen atoms on the surface, in the volume, and at an interfacial layer of solid materials. The near-surface hydrogen depth profiling of a Pd(110) single crystal and of SiO2/Si(100) stacks is described.
07:42
Magnetic Levitation Coupled with Portable Imaging and Analysis for Disease Diagnostics
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Cited by 11 •
2017
We present a magnetic levitation technique coupled with automated imaging and analysis in both a smartphone-compatible device and a device with embedded imaging and processing. This is applied to measure the density distribution of cells with two demonstrated biomedical applications: sickle cell disease diagnosis and separating white and red blood cells.
10:16
Protocol for Microplastics Sampling on the Sea Surface and Sample Analysis
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Cited by 186 •
2016
The protocol below describes the methodology for: microplastics sampling on the sea surface, separation of microplastic and chemical identification of particles. This protocol is in line with the recommendations for microplastics monitoring published by the MSFD Technical Subgroup on Marine Litter.
09:45
Detection of Trypanosoma brucei Variant Surface Glycoprotein Switching by Magnetic Activated Cell Sorting and Flow Cytometry
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Cited by 3 •
2016
African trypanosomes grown in vitro undergo antigenic variation at a low rate, such that populations are made up of parasites expressing a dominant variant surface glycoprotein (VSG) type and a small population of "switched" variants. This protocol describes a fast method for detecting and quantifying these populations.
FAQs
Surface-sensitive measurements can reveal magnetic behavior that bulk measurements may miss because the outermost layers can differ substantially from the interior. Differences in surface composition and structure alter local magnetic moments, domain organization, and interactions. Comparing surface responses with material or device performance therefore helps engineers determine whether an interface is contributing to a desired function or an unexpected limitation.
Hysteresis measurements show how magnetization changes as the applied magnetic field is varied, including the material’s response history. This makes them useful for evaluating whether a surface maintains controlled magnetic behavior under changing operating conditions. For engineered thin films, coatings, sensors, actuators, or storage materials, the resulting response can be related to functional performance rather than treated as an isolated magnetic measurement.
Tracking spin orientation and domain structure adds spatial or directional context to a surface magnetic measurement. Surfaces may exhibit similar overall magnetization while differing in how magnetic regions are organized or how spins are oriented. Examining these features helps connect microscopic surface behavior with the operation of devices that depend on controlled magnetic states at interfaces.
Controlled conditions are important because the measured response depends on how the surface is challenged and observed. Surface magnetism analysis can vary the applied magnetic field or use a magnetic probe while monitoring magnetization, hysteresis, spin orientation, or domains. Keeping those conditions defined makes results more useful for comparing materials, interfaces, and engineered devices.
For an engineering assessment, the workflow begins by selecting the surface or interface relevant to device operation, then applying a controlled magnetic field or magnetic probe and recording the selected response. Engineers may examine magnetization, hysteresis, spin orientation, or domain structure. They can then relate the measurements to surface composition, structure, and the performance requirement under study.
Applications include evaluating thin films and coatings, developing magnetic sensors and actuators, and studying data-storage materials. The analysis is especially useful when device behavior depends on magnetic control at a surface or interface. It can support materials development, failure analysis, and performance optimization by showing how surface composition and structure relate to magnetic function.