کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1686290 1518762 2006 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structural changes in anatase TiO2 thin films irradiated with high-energy heavy ions
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سطوح، پوشش‌ها و فیلم‌ها
پیش نمایش صفحه اول مقاله
Structural changes in anatase TiO2 thin films irradiated with high-energy heavy ions
چکیده انگلیسی

In order to investigate possible structural changes due to high-density electronic excitation, anatase TiO2 thin film specimens were irradiated with 230 MeV 136Xe15+ ions and 200 MeV 197Au13+ ions. X-ray diffraction (XRD) patterns were measured before and after irradiation. The intensity of the XRD peak assigned to the (0 0 4) planes of anatase TiO2 decreases in an exponential manner as a function of ion-fluence. This result can be explained by the formation of the cylindrical damaged regions (i.e. ion tracks) with diameters of 9.6 and 16.3 nm for 230 MeV Xe and for 200 MeV Au ion irradiations, respectively. The difference in the track diameter between Xe ion irradiation and Au ion irradiation can be attributed to the difference in the electronic stopping power (and to the ion-velocity effect, if any). For 200 MeV Au ion irradiation, splitting of the (0 0 4) peak is observed. The original (0 0 4) TiO2 peak remains in the same position, but the new peak shifts to higher angles as fluence increases.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 250, Issues 1–2, September 2006, Pages 250–253
نویسندگان
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