Fig. 6From: Gold nanoparticles with chitosan, N-acylated chitosan, and chitosan oligosaccharide as DNA carriersTEM micrographs from a 4.7 nm acylated chitosan AuNPs, b 3.5 nm chitosan AuNPs (0.1 M NaBH4), c 7.4 nm oligosaccharide chitosan AuNPs (COS@1), d 15.6 nm oligosaccharide chitosan AuNPs (COS@2), e 10 nm oligosaccharide chitosan AuNPs (COS@3), and f 14 nm oligosaccharide chitosan AuNPs (COS@4)Back to article page