01837nas a2200157   4500008004100000022001400041245012400055210006900179260011000248300001600358490000600374520112900380100001601509700002401525856013001549       2014                        eng d  a2046-206900aGreen synthesis of noble metal nanoparticles using cysteine-modified silk fibroin: catalysis and antibacterial activity0 aGreen synthesis of noble metal nanoparticles using cysteinemodif  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcSEP  a46285-462920 v43 a<p>Noble metal nanoparticles (NPs) have shown remarkable potential for numerous applications. In this work, a simple, one-pot, green method for the synthesis of gold, silver, palladium, and platinum NPs by using thiol-modified silk fibroin (SF-SH) has been described. The incorporation of thiol groups into silk fibroin (SF) yields small, mono-dispersed metal nanoparticles with good colloidal stability. UV-Vis, transmission electron microscopy (TEM), and X-ray powder diffraction (XRD) analyses show the formation of NPs, and thermo-gravimetric analysis (TGA) data reveal interaction of the NPs with thiol-modified SF. We also show that all the NP-SF conjugates catalyse the reduction of p-nitrophenol to p-aminophenol in the presence of NaBH4 at room temperature. The NP-SF conjugate materials were processed into different material formats like porous scaffolds and films without compromising their individual properties. The Au-SF-SH composite scaffold was used successfully in the heterogeneous catalysis of p-nitrophenol reduction using NaBH4 while the Ag-SF-SH conjugated film showed good antibacterial activity.</p>1 aDas, Soumen1 aDhar, Basab, Bijayi  uhttps://library.ncl.res.in/content/green-synthesis-noble-metal-nanoparticles-using-cysteine-modified-silk-fibroin-catalysis-0