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The hydrogen-free diamond-like carbon (DLC) films were prepared at different laser intensities by pulsed laser ablating a graphite target in vacuum circumstance at room temperature. By varying the laser intensities from 2.5×10 8 to 7.5×10 8 W/cm 2 the room-temperature photoluminescence (PL) was found in the range of 580–800nm. The PL integrated intensity was decreased with...
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