Liu, N.N.LiuHaublein, V.V.HaubleinZhou, X.M.X.M.ZhouVenkatesan, U.U.VenkatesanHartmann, M.M.HartmannMackovic, M.M.MackovicNakajima, T.T.NakajimaSpiecker, E.E.SpieckerOsvet, A.A.OsvetFrey, L.L.FreySchmuki, P.P.Schmuki2022-03-052022-03-052015https://publica.fraunhofer.de/handle/publica/24164410.1021/acs.nanolett.5b02663We apply high-energy proton ion-implantation to modify TiO2 nanotubes selectively at their tops. In the proton-implanted region, we observe the creation of intrinsic cocatalytic centers for photocatalytic H-2-evolution. We find proton implantation to induce specific defects and a characteristic modification of the electronic properties not only in nanotubes but also on anatase single crystal (001) surfaces. Nevertheless, for TiO2 nanotubes a strong synergetic effect between implanted region (catalyst) and implant-free tube segment (absorber) can be obtained.en620journal article