TiO2　nanoparticles　(NPs)　were　deposited　on　Ti　foil　by　fs-PLD　at　room　temperature　under　different　chamber　pressure　from　high　vacuum　(similar　to　10(-6)　mbar)　to　oxygen　pressure　(0.1　mbar,　1　mbar).　The　present　work　focuses　on　investigating　the　effects　of　deposition　conditions　on　crystalline　phase,　morphology　and　photoelectrochemical　properties　of　the　resulting　TiO2　NPs-assembled　films　electrode.　The　results　show　that　the　morphology　of　the　sample　obtained　in　1　mbar　shows　the　sparser　nanoagglomerates　than　that　of　TiO2　NPs　deposited　under　vacuum　or　in　0.1　mbar.　Moreover,　TiO2　NPs　films　with　pure　rutile　phase　and　the　thickness　of　less　than　400　nm　exhibited　the　higher　photocurrent　densities　and　the　greater　charge　carrier　densities.　Combined　with　the　analysis　of　the　photovoltage,　it　can　be　deduced　that　the　optimal　deposition　condition　for　better　PEC　performance　of　TiO2　NPs　films　produced　by　fs-PLD　is　the　higher　chamber　pressure　(1　mbar)　and　longer　deposition　time　(3　h).　Copyright　(C)　2014,　Hydrogen　Energy　Publications,　LLC.　Published　by　Elsevier　Ltd.　All　rights　reserved.