Journal
ACS PHOTONICS
Volume 3, Issue 5, Pages 754-757Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsphotonics.6b00131
Keywords
quantum dots; diffraction-limited color printing; electrohydrodynamic NanoDrip printing; RGB color printing
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Funding
- Swiss National Science Foundation [146180]
- European Research Council under the European14 Union's Seventh Framework Programme (FP)/ERC Grant [339905]
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Color printing at the diffraction limit has been recently explored by fabricating nanoscale plasmonic structures with electron beam lithography. However, only a limited color range and constant intensity throughout the structure have been demonstrated. Here we show an alternative, facile approach relying on the direct, open-atmosphere electrohy-drodynamic rapid NanoDrip printing of controlled amounts of red, green, and blue (RGB) quantum dots at a resolution of 250 nm. The narrow emission spectrum of the dots allows the coverage of a very broad color space, exceeding standard RGB (sRGB) of modern display devices. We print color gradients of variable intensity, which to date could not be achieved with diffraction-limited resolution. Showcasing the capabilities of the technology, we present a photorealistic printed image of a colorful parrot with a pixel size of 250 nm.
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