Superhydrophobic　copper　films　with　hierarchically　sandbeach-like　morphologies　were　grown　on　Si　substrates　using　direct　current　(DC)　sputtering.　After　the　surfaces　were　hydrophobized　with　1-Octadecanethiol　(ODT),　the　surfaces　became　superhydrophobic.　The　substrate　temperature　during　sputtering　played　a　key　role　in　the　formation　of　the　surface　morphology.　The　films　exhibited　long-term　stability　in　the　temperature　range　of　25　to　100　degrees　C.　The　underwater　stability　of　the　surfaces　was　also　characterized　by　studying　the　water　contact　behavior　on　the　immersed　surfaces　under　different　static　pressures.　After　immersion　in　different　depth　in　water,　the　film　surfaces　changed　from　superhydrophobic　even　to　superhydrophilic,　due　to　the　water　trapped　in　the　surface　structures.　A　model　was　proposed　to　explain　such　change　in　the　surface　wettability.　(C)　2013　Elsevier　B.　V.　All　rights　reserved.