Abstract
Abstract It has been examined to disperse the Au nano-particles directly into liquid by replacing the solid substrate with low-vapor oil in a plasma sputtering apparatus. The dispersing particles in oil is much smaller than the conventional methods. Under low density of particles on oil, the intense absorbance peak is detected around 325 nm and the shape and peak of absorption spectra don’t almost change following time, and the size of Au particles is steady. With higher density, the absorbance peak is stronger and shifts to visible light about 20 nm. With prolonging measuring time, absorption peaks fall and a new absorption locating on around 550 nm gradually appears, large numbers of particles gradually convert and produce the new particles sizes around 3-5 nm. under high density, the other intense absorbance peak exists around 540 nm besides the peak of 350 nm. High particles density produces the particles sizes around 5-7 nm, and the contents and sizes of particles are basic invariablenes against measured period.
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