توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Catalyst Rippling and Interface Growth of CNTs Over the Hot Filmanet Grown Fe–Cr Thin Films
اطلاعات انتشار: سومین کنفرانس نانوساختارها، سال
تعداد صفحات: ۴
In this study a Hot Filament Chemical Vapor Deposition (HFCVD) technique was used to prepare Fe–Cr films on Si substrate as catalysts for Thermal CVD (TCVD) growing of Carbon Nanotubes (CNTs) from liquid petroleum gas (LPG) at 800°C. To characterize the catalysts or CNTs, X–ray Photoelectron Spectroscopy (XPS), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and Raman spectroscopy were used. The XPS combined with different stages of Ar sputtering revealed that in the depth of catalyst layers, the relative Fe–Cr concentrations are higher than the top–surface. SEM images of samples after TCVD indicates a significant CNT growing at the backside of catalyst compared with its top which is accompanied with formation of cone–shape structures, rippling, cracking and rolling of catalyst layer. We attributed these observations to the more catalytic activity of the sub–surface beside the poor activity of the top–surface as well as the presence of individual active islands over the surface.<\div>
نمایش نتایج ۱ تا ۱ از میان ۱ نتیجه