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Adsorption properties of Rosmarinus officinalis oil as green corrosion inhibitors on C38 steel in 0.5 M H₂SO₄

Rosmarinus officinalis essential oil obtained by hydrodistillation was tested as corrosion inhibitor of steel in 0.5~M H₂SO₄ using weight loss measurements, and electrochemical polarisation methods. Results obtained indicate that the corrosion rate is reduced and R.officinalis oil adsorbs on the metal surface and then inhibits corrosion process. Its inhibition efficiency increases with oil increasing content to reach 61 % at 1 g/L. Polarisation curves indicate that RO acts as a cathodic inhibitor. The inhibition efficiency of naturally oil remains slightly constant with the rise of temperature. Chemical analysis of R.~officinalis essential oil was carried out using capillary GC and GC/MS. The oil composition was characterized by high amount of oxygenated monoterpene (77 %) with 1,8-cineol (52.1 %) as main component. Discussion of adsorption was investigated on the basis of essential oil composition. Finally, the isotherm adsorption of essential oil on the steel has been also reported.

关键词: Rosmarinus officinalis oil

Antibacterial Characterization of Silver Nanoparticles against E. Coli ATCC-15224

材料科学技术（英文）

关键词:

有机EL和LED与无机EL和LED发光机制的异同

李文连

液晶与显示 doi:10.3969/j.issn.1007-2780.2001.01.007

比较了有机EL和LED与无机EL和LED的主要差异。有机EL属于电注入发光，无机EL属于高场激发下的碰撞离化机制，而且有机LED和无机LED的激发和发光机制也不同。无机半导体中往往存在着局域载流子，而有机LED必须从电极注入，在未注入载流子之前，它们是绝缘体。不能简单地用无机LED中的p-n结理论来解释有机LED的发光现象。

关键词: 有机电致发光 , 半导体 , 发光

有机EL与无机EL和LCD的比较及其未来前景

李文连

液晶与显示 doi:10.3969/j.issn.1007-2780.2002.01.005

通过比较有机EL与无机EL、LCD在平板显示应用方面的差异,展示了OELD的美好应用前景.由于无机薄膜EL缺乏高亮度蓝基色成分以及驱动电压是100V左右的交流,难于制成低压彩色超薄显示器;无机分散型EL屏采用的是十几微米厚的粉末材料,也难于制成高分辨率超薄显示器,因此它们都无法与OELD相比.OELD显示器体积可以是LCD的1/2,功耗也大大低于LCD,所以OELD将有望取代LCD.评述了当前OELD的最新发展趋势:采用荧光染料掺杂式的模糊界面结构的电致荧光器件和采用荧光染料掺杂式的电致磷光器件是当前OELD发展的主要潮流.文中还评述了采用低折射率材料提高外量子效率的情况.

关键词: 电致发光 , 磷光 , 发光平板显示