Say it with love ... and DNA! Researchers from Harvard Medical School have made letters and wingdings out of DNA. Each one of the letter above is made from a single strand of the genetic material:
Each strand is unique, and folds to form a rectangular tile. When mixed, neighbouring tiles stick to each other in a brick-wall pattern, and shorter boundary tiles lock the edges in place.
In their simplest configuration, the tiles produce a solid 64-by-103-nanometre rectangle, but Wei and his team can create more complex shapes by leaving out specific tiles. Using this strategy, they created 107 two-dimensional shapes, including letters, numbers, Chinese characters, geometric shapes and symbols. They also produced tubes and rectangles of different sizes, including one consisting of more than 1,000 tiles.
DNA sans, anyone? Link - via Not Exactly Rocket Science