منابع مشابه
Magnetically modulated optical nanoprobes
We have developed magnetically modulated optical nanoprobes ~MagMOONs! to magnetically modulate the signal from fluorescent probes and thus separate it from autofluorescence, electronic offsets, and other background signals. These microand nanosized particles emit fluorescence signals, indicating chemical concentrations, and blink in response to rotating magnetic fields. Demodulating the signal...
متن کاملAspherical magnetically modulated optical nanoprobes „MagMOONs..
Aspherical magnetic particles orient in a magnetic field due to magnetic shape anisotropy. They also emit different fluxes of light from their different geometric faces due to self-absorption and total internal reflection within the particles. The particles rotate in response to rotating magnetic fields and appear to blink as they rotate. We have made pancake and chain shaped particles and magn...
متن کاملMicrorheology with modulated optical nanoprobes (MOONs)
Metal-capping of one hemisphere of a nano or microparticle breaks the particle’s optical symmetry, allowing its orientation to be tracked using fluorescence and reflection. Tracking orientation and rotation allows the torques acting on the particles be inferred. In addition to serving as rotational nanoviscometers these probes report on local Brownian, magnetic and biomechanical torques. r 2005...
متن کاملOptical imaging through scattering media via magnetically modulated fluorescence.
A weak (< 1000 G) magnetic field can influence photochemical processes through its effect on electron spin dynamics in a photogenerated radical pair. In a solution of pyrene and dimethylaniline this effect manifests as magnetic field-dependent exciplex fluorescence. Here we describe magnetofluorescence imaging (MFI). A localized magnetic null defines a fluorescence detection volume, which is sc...
متن کاملMagnetically modulated therapeutic systems.
Magnetically targeted drug delivery by particulate carriers is an efficient method of delivering drugs to localized disease sites, such as tumors. High concentrations of chemotherapeutic or radiological agents can be achieved near the target site without any toxic effects to normal surrounding tissue. Non-targeted applications of magnetic microspheres and nanospheres include their use as contra...
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ژورنال
عنوان ژورنال: Applied Physics Letters
سال: 2003
ISSN: 0003-6951,1077-3118
DOI: 10.1063/1.1544435