Recent experimental observation of a new phase of water-square ice [1] sandwiched between graphene layers at room temperature by TEM images, sparked considerable controversy and debates. One comment [2] suggested that the original experimental data can be better explained by salt (for example, NaCl) contaminants precipitating as nanocrystals in the dried-out graphene liquid cells and common oxide contaminants in graphene. Further experimental and theoretical studies are required to assess the existence of the square ice in graphene nanochannels. In the proposal, we will prepare similar samples as conditions given by ref [1] and make series of INS measurements. Since INS is very sensitive to scattering on water hydrogen, we expect to get direct information on vibrational spectra of confined water, the translational and librational modes of which are strongly affected by the local geometries. The 2D square-ice in graphene sheets has also been simulated, and the obtained vibrational difference from the spectra of normal 3D cubic and hexagonal ices. The INS measurements will provide a unique opportunity for us to confirm that the local water structures are squared or otherwise.