Synthesis of chitosan-stabilized gold nanoparticles in the absence/presence of tripolyphosphate.
Gold nanoparticles were prepared by reducing gold salt with a polysaccharide, chitosan, in the absence/presence of tripolyphosphate (TPP). Here, chitosan acted as a reducing/stabilizing agent. The obtained gold nanoparticles were characterized with UV--vis spectroscopy and transmission electron microscopy. The results indicated that the shape and size distribution of gold nanoparticles changed with the molecular weight and concentration of chitosan. More interestingly, the gelation of chitosan upon contacting with polyanion (TPP) can also affect the shape and size distribution of gold nanoparticles. By adding TPP to chitosan solution before the reduction of gold salt, gold nanoparticles have a bimodal size distribution, and at the same time, polygonal gold particles were obtained in addition to spherical gold nanoparticles.
Huang
Haizhen
H
State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun Jilin 130022, PR China.
Yang
Xiurong
X
D001672:Biocompatible Materials / Q000737:chemistry*; D002686:Chitin / Q000737:chemistry; D048271:Chitosan / Q000737:chemistry*; D004583:Electrons; D006046:Gold / Q000737:chemistry; D046911:Macromolecular Substances; D046529:Microscopy, Electron, Transmission; D008970:Molecular Weight; D049329:Nanostructures; D036103:Nanotechnology / Q000379:methods*; D011122:Polyphosphates / Q000737:chemistry*; D013053:Spectrophotometry; D014466:Ultraviolet Rays; D014961:X-Ray Diffraction
D001672:Biocompatible Materials; D046911:Macromolecular Substances; D011122:Polyphosphates; D002686:Chitin; D006046:Gold; D048271:Chitosan; C005692:triphosphoric acid