We found that gold particles, prepared by reduction of HAuCl₄ with trisodium citric acid in the solutions of weak acidity, with a diameter of about 17 nm have different ratios between unsmooth surfaces and smooth surfaces. Gold particles with a diameter of about 7 nm have the structure in which amorphous coexist with crystalline. This paper put forward that study on synthesis of the gold particles of partial amorphous structure and growth increase of unsmooth surfaces and growth control of smooth surfaces should be the future developing direction. [DOI: 10.1380/ejssnt.2009.134]