The ultimate reduction in size for an engineer is to a single molecule. It’s been done for a car; now it has been reported for the pixel (picture-element).[1]
References
- J.E. Kwon, S. Park, and S.Y. Park, "Realizing Molecular Pixel System for Full-Color Fluorescence Reproduction: RGB-Emitting Molecular Mixture Free from Energy Transfer Crosstalk", Journal of the American Chemical Society, vol. 135, pp. 11239-11246, 2013. http://dx.doi.org/10.1021/ja404256s