The　lotus-leaf-like　superhydrophobic　copper　was　fabricated　by　a　facile　two-step　method　without　the　chemical　modi.　cation,　on　which　the　water　contact　angle　can　reach　158　degrees　and　the　water-sliding　angle　is　less　than　10　degrees.　Reversible　superhydrophobicity　to　superhydrophilicity　transition　was　observed　and　controlled　by　alternation　of　UV　irradiation　and　dark　storage.　More　interestingly,　the　superhydrophobic　surface　exhibits　superoleophilicity　and　all　those　properties　can　be　well　used　in　reversible　switch,　separating　the　water　and　oil　and　so　on.　(C)　2010　Elsevier　B.　V.　All　rights　reserved.