In situ synthesis of silver/chemically reduced graphene nanocomposite and its use for low temperature conductive paste

Abstract

In this work, we succeeded in the synthesis of Ag/chemically reduced graphene (Ag/G) nanocomposite by a facile in situ one-pot solvothermal route. X-ray diffraction, X-ray photoelectron spectroscopy, Raman spectra and Fourier transform infrared spectroscopy results revealed the formation of Ag and the reduction of graphite oxide to graphene during the one-pot process. Scanning electron microscopy observation indicated that spherical Ag particles with a size less than 100 nm are wrapped by graphene. The Ag/G nanocomposite was used in a low temperature conductive paste. Thermal analysis was conducted to determine the proper curing process of the Ag/G conductive paste. The Ag/G conductive paste that contains 0.6 wt% graphene exhibits low sheet resistance (22 mΩ/sq/25 µm) and good stability after cured at 150 °C for 30 min, which made us believe that the Ag/G nanocomposite is a promising candidate for conductive paste.