کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5426853 1395910 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Oxidation of Au nanoparticles on HOPG using atomic oxygen
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Oxidation of Au nanoparticles on HOPG using atomic oxygen
چکیده انگلیسی

Various Au nanostructures prepared on highly ordered pyrolytic graphite (HOPG) were oxidized using atomic oxygen under ultrahigh-vacuum conditions, and the oxygen species formed in the Au nanostructures were characterized using X-ray photoelectron spectroscopy (XPS). For an Au thin film, only a single oxygen species could be identified in the O 1s spectrum, which can be attributed to Au-oxide. For Au nanoparticles smaller than ∼10 nm, in contrast, two different oxygen species were detected, which are suggested to be Au-oxide and subsurface oxygen (or dissolved oxygen), respectively. CO titration experiments confirm the formation of different oxygen species depending on the particle size.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 600, Issue 3, 1 February 2006, Pages 507-513
نویسندگان
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