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Composite overlay of optical and electron microscope images of a carbon nanotube lamp filament between electrodes about 1 μm apart. The nanotube itself is not visible in the image. Colored contours indicate the size and shape of the incandescence intensity distribution. [Yuwei Fan, S. B. Singer, Raymond Bergstrom, and B. C. Regan, Phys. Rev. Lett. 102, 187402 (2009)] |


