Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
ACS Appl Mater Interfaces. 2009 Apr;1(4):927-33. doi: 10.1021/am900032p.
Ultrathin carbon layers, on the order of 3-6 nm in thickness, were formed on glass substrates by spin coating and pyrolysis of polymer precursors. The organic precursors used were poly(furfuryl alcohol), coal tar pitch, and a photoresist. The carbon coatings were characterized by ellipsometry, optical profilometry, water contact angle, confocal Raman spectroscopy, UV-vis spectroscopy, and atomic force microscopy. We also report the transparency, hydrophobicity, friction, weathering resistance, and electrical conductivity of the carbon-coated glass. The results reveal that up to 97% transparent, ultrathin carbon films could be formed on glass substrates with a root-mean-square roughness of less than approximately 0.3 nm. This carbon layer modified the otherwise hydrophilic surface of the glass to yield a water contact angle of 85 degrees . The coatings were also found to provide a water barrier against weathering under hot and humid conditions. A 4.5-nm-thick carbon film on glass had a sheet resistance of 55.6 kOmega m and a conductivity of 40 S/cm.
通过旋转涂布和热解聚合物前驱体，在玻璃基底上形成了厚度约为 3-6nm 的超薄碳层。使用的有机前驱体为聚糠醇、煤焦油沥青和光刻胶。通过椭圆光度法、光学轮廓仪、水接触角、共焦拉曼光谱、紫外-可见光谱和原子力显微镜对碳涂层进行了表征。我们还报告了涂覆碳的玻璃的透光性、疏水性、摩擦性、耐候性和导电性。结果表明，在玻璃基底上可以形成高达 97%透明的、厚度小于约 0.3nm 的超薄碳膜。这种碳层将玻璃原本亲水的表面改性为水接触角为 85 度。涂层还发现能在湿热条件下提供抗风化的水屏障。玻璃上 4.5nm 厚的碳膜的方阻为 55.6kΩm，电导率为 40S/cm。
