There is an experiment happening on the International Space Station called, Materials International Space Station Experiment - 7 (MISSE7). During the experiment several nanocomposite materials are being tested for endurance in the high radiation and extreme temperature ranges of space. The experiment is being led by the US Air Force in conjunction with several US Universities.
Materials Being Tested
According to NASA, there are 'over 700 new and affordable materials' being tested under the auspices of MISSE7. 'Specimens include solar cells and candidate spacecraft materials'. These materials are expected to be useful in the design of 'solar cells, optics, sensors, electronics, power, coatings, structural materials and protection for the next generation of spacecraft'
More specific examples of the materials being tested are :