Stability of microstructure at high temperatures in silver nanoparticles coated with an in situ grown thin graphitic carbon layer

摘要

Finely dispersed silver nanoparticles (AgNPs) coated with an in situ grown stabilization layer of graphitic carbon (similar to 1 nm thickness) on the surface were obtained by a simple sol-gel type process. The novel technique permits precise control over the shape and surface structure of the AgNPs and ensures a narrow size distribution. Structural, optical, and thermal stability of the AgNPs were studied and the results were discussed in correlation with the effects of the surface layer. Such type of highly stable (even at high temperatures) and monodispersed AgNPs are promising for numerous applications in wide domains starting from photonics to catalysis. (C) 2018 Elsevier B.V. All rights reserved.