  Recent observations of superconducting like transition at 286 K in Ag and Ag
nanostructures by Thapa et al. (arxiv: 1807.08572) have rekindled the hope for
room temperature superconductivity under ambient conditions. We also
investigated the electrical properties of Ag-Au nanostructure in the form of
thin film grown on SiO2/Si substrate by DC sputtering and observed signature of
zero resistance in the temperatures range of 243 K to 275 K. While the observed
electrical resistance of samples shows intriguing and perplexing behavior under
temperature cycling and external magnetic field; the large spatial
inhomogeneity present in thin film hampers the reproducibility indicating the
stability issues associated with superconducting like phase.
