Brilliant dust: Nanoparticle doped on-chip microplasmas for fluorescent detection of biomolecules
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This paper reports on Brilliant Dust, a new nanoparticle-doped on chip microplasma (small-scale electric discharge) device. By changing the nanoparticle species, a multichannel, tunable on-chip Vis/UV optical source is enabled. This source is constructed on a microsandblasted glass structure with metal electrodes that serve to confine and energize vacuum and atmospheric microplasmas. Also confined in these cavities are metaloxide nanoparticles, which as the microplasma is energized charge negatively, levitate, and dope the spectral discharge, creating a dusty microplasma. An array of these on-chip optical sources, doped with different nanoparticles produces a set of tunable, stable visible-to-UV light emitting optical sources. The UV source, doped with chrome-oxide nanoparticles, is utilized to fluoresce thermo-electron M1420MP bio-tagging dye held in an off-chip reservoir, illustrating potential use in a variety of lab-on-a-chip applications. 2006 IEEE.