High sensitivity measurement of magnetic fields using microcantilevers

Cowburn, R. P.; Moulin, A. M.; Welland, Mark E.

doi:10.1063/1.119381

Cited by 35 publications

(13 citation statements)

References 14 publications

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“…The reduction of the oxidized polymer removed the surface stress, and the lever was retracted to its original position. Biorecognition events such as antibody-antigen [342] or nucleic acid-DNA [343] binding processes were similarly reported to stimulate the mechanical deflection of cantilevers. The electrostatic repulsions between surface-hybridized DNA were reported to induce a surface stress that resulted in the mechanical deflection of the lever.…”

Section: Magnetomechanical Detection Of Biorecognition Eventsmentioning

confidence: 99%

“…The electrostatic repulsions between surface-hybridized DNA were reported to induce a surface stress that resulted in the mechanical deflection of the lever. [343] The use of a cantilever array for the parallel micromechanical detection of different target DNAs or different mutants was also suggested. The force exerted on a lever that is modified with magnetic particles and subjected to an external magnetic field could drive the deflection of the cantilever.…”

Section: Magnetomechanical Detection Of Biorecognition Eventsmentioning

confidence: 99%

See 1 more Smart Citation

Integrated Nanoparticle–Biomolecule Hybrid Systems: Synthesis, Properties, and Applications

2004

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Nanomaterials, such as metal or semiconductor nanoparticles and nanorods, exhibit similar dimensions to those of biomolecules, such as proteins (enzymes, antigens, antibodies) or DNA. The integration of nanoparticles, which exhibit unique electronic, photonic, and catalytic properties, with biomaterials, which display unique recognition, catalytic, and inhibition properties, yields novel hybrid nanobiomaterials of synergetic properties and functions. This review describes recent advances in the synthesis of biomolecule-nanoparticle/nanorod hybrid systems and the application of such assemblies in the generation of 2D and 3D ordered structures in solutions and on surfaces. Particular emphasis is directed to the use of biomolecule-nanoparticle (metallic or semiconductive) assemblies for bioanalytical applications and for the fabrication of bioelectronic devices.

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Section: Magnetomechanical Detection Of Biorecognition Eventsmentioning

confidence: 99%

Section: Magnetomechanical Detection Of Biorecognition Eventsmentioning

confidence: 99%

Integrated Nanoparticle–Biomolecule Hybrid Systems: Synthesis, Properties, and Applications

2004

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“…Bei Reduktion des oxidierten Polymers verschwindet die Oberflächenspannung, und der Federhebel kehrt in seine Ausgangsposition zurück. Biologische Erkennungsprozesse wie Antikörper‐Antigen‐342 und Nucleinsäure‐DNA‐Wechselwirkungen343 sind gleichermaßen geeignet, einen Federhebel mechanisch auszulenken. Zum Beispiel induziert die elektrostatische Abstoßung zwischen oberflächenhybridisierten DNA‐Molekülen eine Oberflächenspannung und damit eine mechanische Auslenkung des Federhebels 343…”

Section: Biomolekular Funktionalisierte Magnetische Partikelunclassified

Integrierte Hybridsysteme aus Nanopartikeln und Biomolekülen: Synthese, Eigenschaften und Anwendungen

2004

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Metall‐ oder Halbleiter‐Nanopartikel und Nanostäbchen haben ähnliche Dimensionen wie Proteine (Enzyme, Antigene, Antikörper) oder DNA. Die Integration von Nanopartikeln (mit ihren besonderen elektronischen, photonischen und katalytischen Eigenschaften) mit Biomaterialien (mit ihren einzigartigen Erkennungsmechanismen sowie katalytischen und inhibierenden Fähigkeiten) ergibt hybride Nanobiomaterialien mit synergistischen Eigenschaften und Funktionen. Dieser Aufsatz beschreibt die aktuellsten Entwicklungen bei der Synthese von Hybridsystemen aus Biomolekülen und Nanopartikeln oder Nanostäbchen und deren Anwendung zum Aufbau von geordneten 2D‐ und 3D‐Strukturen in Lösung und auf Oberflächen. Schwerpunkte sind der Einsatz von Biomolekül‐Nanopartikel‐Konjugaten für die Bioanalytik sowie zur Herstellung bioelektronischer Funktionseinheiten und Nanoleiterbahnen aus Metall, Halbleitern oder magnetischen Materialien.

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“…Such an application was proposed in our earlier publications 13,15 and was recently investigated by Cowburn et al, 26 who used ferromagnetic ␥-Fe 2 O 3 particles at the end of a microcantilever.…”

Section: Calibration and Resolutionmentioning

confidence: 99%

Torsion cantilever as magnetic torque sensor

Rossel

Willemin

Gasser

et al. 1998

Review of Scientific Instruments

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High sensitivity magnetic head for a shaft torque sensorA macroscopic cantilever for capacitive torque magnetometry has been developed and tested. It is based on torsion arms in order to obtain better damping against external vibrations than with ordinary cantilevers of similar size but anchored on one side. Microfabricated out of silicon-on-insulator wafers by deep reactive ion etching, the sensor consists of a long ͑14 mm͒ and thin ͑40 m͒ cantilever with two capacitive plates, anchored at its center to a rigid frame by two torsion bars having a rectangular cross section (80ϫ40 m 2 ). By comparing the theoretical and experimental resonance frequencies in three different oscillation modes, we show that the elastic properties of the torque sensor can be evaluated with good accuracy. Calibrations performed with a piece of Fe 2 O 3 audiotape and a cylindrical NdFeB magnet yield a torque sensitivity better than 5 ϫ10 Ϫ13 N m under optimized conditions. This device can also be used as a sensitive Gauss meter to detect magnetic fields down to 10 nT.

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High sensitivity measurement of magnetic fields using microcantilevers

Cited by 35 publications

References 14 publications

Integrated Nanoparticle–Biomolecule Hybrid Systems: Synthesis, Properties, and Applications

Integrated Nanoparticle–Biomolecule Hybrid Systems: Synthesis, Properties, and Applications

Integrierte Hybridsysteme aus Nanopartikeln und Biomolekülen: Synthese, Eigenschaften und Anwendungen

Torsion cantilever as magnetic torque sensor

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