کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5356397 1503651 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Triggering the atomic layers control of hexagonal boron nitride films
ترجمه فارسی عنوان
کنترل لایه اتمی کنترل فیلم های نیتروژن بور شش ضلعی
کلمات کلیدی
نیترید بور بور شش ضلعی، لایه اتمی کنترلشده، رسوبات بخار شیمیایی، فویل نیکل، مکانیسم رشد،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
چکیده انگلیسی
In this work, we report the successful synthesis of large scale hexagonal boron nitride films with controllable atomic layers. The films are grown on thin nickel foils via ambient pressure chemical vapor deposition with borazine as the precursor. The atomic layers of h-BN films can be controlled in a narrow range by adjusting growth time and the cooling rates. Transmission electron microscope results shows the h-BN films exhibit high uniformity and good crystalline. X-ray photoelectron spectroscopy shows the B/N elemental ratio is about 1.01. The h-BN films exhibit a pronounced deep ultraviolet absorption at 203.0 nm with a large optical band gap of 6.02 ± 0.03 eV. The results suggest potential applications of h-BN films in deep ultraviolet and dielectric materials. Growth mechanisms of h-BN films with thickness control are discussed, especially when the synthesized h-BN films after a higher cooling rate show an in-plane rotation angle between bilayers. Both epitaxial growth and diffusion-segregation process are involved in the synthesis of bilayer h-BN films.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 313, 15 September 2014, Pages 647-653
نویسندگان
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