The layer-by-layer (LbL) assembling processes are generally amenable to biomaterials just because of their simplicity and chemical mildness [1,2].Since the LbL assembly is usually performed in aqueous medium and does not require harsh conditions,biomaterials can be assembled under conditions suitable to maintain their specific activities.Particularly,the applications of the LbL assemblies in medical fields such as drug delivery have been paid special attention [3].