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We report that gold nanocrystals can be prepared from vapor phase using chloroauric acid (HAuCl 4 ) as the precursor. By tuning the vapor-phase deposition parameters, the size and space distribution of the gold nanocrystals can be well controlled on substrates. Systematic control experiments demonstrate that intermediate AuCl and AuCl 3 products pyrolyzed from HAuCl 4 play...
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