After centrifugation, particles settled down and also along the centrifuge tube wall. and after drying the pellet in oven, yield of silver powder is too low . Kindly suggest the best way of separating and drying to obtain silver nano powder.
After careful centrifugation, place your particles in oven or incubator at 100 degree centigrade for 2 hr followed by calcination/annealing at 500 degree centigrade dor 3 hr. You will get particles of good quality.