. "Titania nanoparticles"@en . "Semiconductor"@en . "Nano-particle"@en . . . "Modelling"@en . "Electronic paramag- netic resonance spectroscopy"@en . "EPR"@en . "Thin film"@en . "Martel" . "Ball milling"@en . "Photo-catalytic properties"@en . "Kinetic of photo-generated species"@en . "Photo-generated radicals"@en . "David" . . . . <0000-0001-5203-5158> . "David Martel" .