The Russians perfected a far less energy-hogging method that uses centrifuges to spin the uranium hexafluoride at 50, 000rpm so that heavier u-238 separates from lighter u-235.
The only unambiguously effective method of reducing the long-term carbon and energy cost of air travel is to fly less a behavioral change, not a technological one.
Dr. Sen Kim claims to have achieved the separation of Hydrogen using just 0.1kwh of energy compared to the traditional 4 - 4.5kwh required using the ol' electrolytic method.
With this project she will develop a new label-free biomolecular detection method, based on a technique called Plasmon Resonance Energy Transfer (PRET), to monitor biochemical pathways involved in the differentiation of stem cells.