GROWTH MODEL OF TEXTURED DIAMOND (111) FILM IN CH4/O2/H2 ATMOSPHERE

Partially oriented and highly textured diamond films on Si( 111 ) substrates were achieved by hot-filament chemical vapor deposition(HFCVD). High nucleation density greater than 5×10⁸cm^-2 was realiged in 3 min by near-surface glow discharge. The os-grown films were characterized by scanning electron microscopy(SEM), X-ray diffraction(XRD) and Raman spectroscopy. It was found that by adding a small amount of oxygen to the mixture of CH₄/H₂, the appearance of facet(111) was well controlled, and the secondary nucleation on the facet(111) was suppressed greatly. Growth feature of homoepitaxy on diamond (111) surface was demonstrated to be in Stranski-Krastanov model by SEM.     

GROWTH MODEL OF TEXTURED DIAMOND (111) FILM IN CH4/O2/H2 ATMOSPHERE

Partially oriented and highly textured diamond films on Si( 111 ) substrates were achieved by hot-filament chemical vapor deposition(HFCVD). High nucleation density greater than 5×10⁸cm^-2 was realiged in 3 min by near-surface glow discharge. The os-grown films were characterized by scanning electron microscopy(SEM), X-ray diffraction(XRD) and Raman spectroscopy. It was found that by adding a small amount of oxygen to the mixture of CH₄/H₂, the appearance of facet(111) was well controlled, and the secondary nucleation on the facet(111) was suppressed greatly. Growth feature of homoepitaxy on diamond (111) surface was demonstrated to be in Stranski-Krastanov model by SEM.     

均相伏安免疫法测定人体免疫球蛋白IgG、IgA 和IgM

本文叙述了一个用均相伏安免疫法测定人体免疫球蛋白G、A、M (IgG、IgA、IgM)—抗原(在我们的情况下)和羊抗人体免疫球蛋白G、A、M(抗IgG、抗IgA、抗IgM)-抗体(在我们的情况下)的简单而快速的方法.在NH_3-NH_4C1-KC1支持电解质中,抗原或抗体用差分脉冲极谱在-1.19V和-1.37V(VS. 1NAg-AgC1)出现两个还原峰.经过抗原和抗体的免疫反应后,相对波高差与在固定浓度抗IgG(抗IgA、抗IgM)时的IgG(IgA、IgIM)浓度成正比。Ag或Ab检测下限为10-10M.这种方法可被用于临床分析.