A nanotube/metal combination can convert CO2, water, and sunlight directly into methane and other hydrocarbons.
An article on nanoscale patterning has two cool advances. First, a way of using mis-cut crystals to template the ordered deposition of 3-nm magnets. Second, and even more interesting to me, a layer of perovskite barely too thin to conduct electricity can be drawn on with a scanning probe, and made to conduct in patterns. This has been used to make transistors with 2 nm features. The drawing process is reversible up to 100 times. It is possible, say the researchers, that circuitry might rewrite itself.
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