Nanotechnology Now - Press Release: Light in concert with force reveals how materials become harder when illuminated: When indented by a probe in darkness, wafers of some semiconductors are putty-like. When illuminated by light whose wavelength matches the band gap, they become hard, as electrons and holes freed by

Nanotechnology Now - Press Release: Light in concert with force reveals how materials become harder when illuminated: When indented by a probe in darkness, wafers of some semiconductors are putty-like. When illuminated by light whose wavelength matches the band gap, they become hard, as electrons and holes freed by

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