Abstract:
We developed a very simple, efficient and environment-friendly synthesis method for
the manufacturing of high-performance chitosan-capped gold nanoparticles that could be used for
biosensing applications. Gold nanoparticles were prepared through the spontaneous reduction of
chloroauric acid by chitosan, which was used as both a reducing and a stabilizing agent. The samples
were heated to a temperature of 60 C under ultrasonic conditions. The composite system made
of chitosan as a matrix and gold nanoparticles demonstrated a high stability in an aqueous buffer
solution. The nanoparticles displayed an enhancement in photonic performance compared with the
same property of individual components as a result of surface plasmon resonance at the interface
between the structural phases of the hybrid structure. The enhanced photonic reactivity of the hybrid
nanostructure may offer new insights for future possible biosensing applications.
