Advances in detection of magnetic fields induced by electrochemical reactions—a review

Juzeliūnas, Eimutis

doi:10.1007/s10008-006-0199-7

Cited by 8 publications

(2 citation statements)

References 36 publications

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“…It is worth emphasizing that there is a real possibility that the inhomogeneously distributed flux of charged reactants during deposition could induce a local magnetic field that drives the magnetization of the small Fe grains. In fact, such magnetic fields induced by electrochemical reactions have long been observed and investigated for corrosion systems . Since the induced magnetic field in solutions is weak because of the low magnetic susceptibility of the solution medium, its influence on the growth of metal may be negligible, especially in the presence of hydrogen evolution interference.…”

Section: Resultsmentioning

confidence: 99%

Growth and Shape-Ordering of Iron Nanostructures on Au Single Crystalline Electrodes in an Ionic Liquid: A Paradigm of Magnetostatic Coupling

Wei

Yan

et al. 2010

J. Am. Chem. Soc.

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Fe electrodeposition on Au(111) and Au(100) in BMIBF(4) ionic liquid is found to form hitherto unreported shape-ordered nanoscale morphologies of pseudorods and pseudosquare rings, respectively, both composed of grains of 4-7 nm. The manner of growth of the square rings is a ring-on-ring structure with enlarging side length and slightly protruding four corners. The generality of the growth mechanism is verified by the formation of almost exactly the same shape-ordered Fe nanostructures on Pt, i.e., pseudorod structure on Pt(111) and pseudosquare rings Pt(100). These structures are explained within the framework of magnetostatic interactions of spontaneously magnetized grains under crystallographic constraint of the substrate surface, which result in an antiparallel arrangement in magnetization of the grains at pseudorods and magnetic flux closure at the pseudosquare rings. The closed magnetic flux further leads to magnetic field-enhanced growth at the four corners and the outer peripheries of the pseudosquare rings. The observed shape-ordering of the Fe thin film serves as a paradigm of magnetostatic coupling, in which the roles of ionic liquid as surfactant and magnetic media may not be underestimated. The present work adds a new dimension to electrodeposition in ionic liquid, by which new magnetic film structures may be expected.

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Section: Resultsmentioning

confidence: 99%

Growth and Shape-Ordering of Iron Nanostructures on Au Single Crystalline Electrodes in an Ionic Liquid: A Paradigm of Magnetostatic Coupling

Wei

Yan

et al. 2010

J. Am. Chem. Soc.

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“…In order to resolve small structures on objects under investigation, it is crucial to measure fields at similarly small distances above the structures. There are many applications where sub-millimeter spatial resolution is essential, such as integrated microwave circuit characterization [24], corrosion monitoring [25][26][27], and in lab-on-a-chip environments for microfluidic analytical chemistry and bio-sensing [19,[28][29][30], and molecular imaging [31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Widefield microwave imaging in alkali vapor cells with sub-100μm resolution

Horsley

Treutlein

2015

New J. Phys.

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We report on widefield microwave vector field imaging with sub-100 m m resolution using a microfabricated alkali vapor cell. The setup can additionally image dc magnetic fields, and can be configured to image microwave electric fields. Our camera-based widefield imaging system records 2D images with a 6 × 6 mm 2 field of view at a rate of 10 Hz. It provides up to 50 m m spatial resolution, and allows imaging of fields as close as 150 m m above structures, through the use of thin external cell walls. This is crucial in allowing us to take practical advantage of the high spatial resolution, as feature sizes in near-fields are on the order of the distance from their source, and represent an order of magnitude improvement in surface-feature resolution compared to previous vapor cell experiments. We present microwave and dc magnetic field images above a selection of devices, demonstrating a microwave sensitivity of 1.4 T Hz 1 2 m per 50 50 140 m 3 ḿ´voxel, at present limited by the speed of our camera system. Since we image 120 × 120 voxels in parallel, a single scanned sensor would require a sensitivity of at least 12 nT Hz 1 2 to produce images with the same sensitivity. Our technique could prove transformative in the design, characterization, and debugging of microwave devices, as there are currently no satisfactory established microwave imaging techniques. Moreover, it could find applications in medical imaging.

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Monitoring active corrosion of metals in natural environments with magnetometry

Gallo

Popovics

2012

Corrosion Science

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Advances in detection of magnetic fields induced by electrochemical reactions—a review

Cited by 8 publications

References 36 publications

Growth and Shape-Ordering of Iron Nanostructures on Au Single Crystalline Electrodes in an Ionic Liquid: A Paradigm of Magnetostatic Coupling

Growth and Shape-Ordering of Iron Nanostructures on Au Single Crystalline Electrodes in an Ionic Liquid: A Paradigm of Magnetostatic Coupling

Widefield microwave imaging in alkali vapor cells with sub-100μm resolution

Monitoring active corrosion of metals in natural environments with magnetometry

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