In-situ synthesis of gold nanoparticles for multifunctionalization of silk fabrics

• Gold nanoparticles are in-situ synthesized on silk fabrics by heating.
• The colors of silk fabrics are adjusted by controlling gold content.
• Treated silk fabrics exhibit significant antibacterial and UV-blocking properties.
• Colored silk fabrics possess good colorfastness to washing and light irradiation.

A simple in-situ synthesis route for gold nanoparticles (NPs) was developed to realize multifunctions for silk fabrics. The gold NPs were prepared in a heated solution containing white silk fabric samples. The silk fabrics were colored red and brown by the gold NPs because of their localized surface plasmon resonance (LSPR) property. Gold nanospheres on silk were obtained at a low gold content, and gold nanoplates were synthesized as the gold content increased. The silk fabrics treated with gold NPs showed good light fastness. Moreover, the gold NPs endowed silk fabrics with strong antibacterial activity, excellent UV protection property and enhanced thermal conductivity.

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