Water Protects Graphitic Surface from Airborne Hydrocarbon Contamination
Water Protects Graphitic Surface from Airborne Hydrocarbon Contamination
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DOI：
10.1021/acsnano.5b04843
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发表时间：
2016-01-01
期刊：
影响因子：
17.1
通讯作者：
Liu, Haitao
中科院分区：
文献类型：
--
作者：
Li, Zhiting;Kozbial, Andrew;Liu, Haitao
石墨材料（例如石墨烯和石墨）的固有润湿性可容易地在环境空气暴露的5-20分钟内被空气传播的烃遮蔽。我们报告了一种方便的方法，有效地保存一个新鲜制备的石墨表面简单地通过水处理技术。这种方法显著地抑制了烃吸附速率，抑制因子为约1/2。20倍，从而在暴露于空气时保持固有的润湿行为许多小时。后续表征表明，石墨表面形成了一层纳米厚的冰状水，在室温下至少能稳定2-3 h，从而显著降低了气载碳氢化合物在石墨表面的吸附。该方法在石墨烯/石墨基器件的制造、表征、加工和储存期间最小化烃污染方面具有潜在意义。作为一个例子，我们表明，水处理的石墨电极在空气中保持高水平的电化学活性长达1天。
The intrinsic wettability of graphitic materials, such as graphene and graphite, can be readily obscured by airborne hydrocarbon within 5-20 min of ambient air exposure. We report a convenient method to effectively preserve a freshly prepared graphitic surface simply through a water treatment technique. This approach significantly inhibits the hydrocarbon adsorption rate by a factor of ca. 20X, thus maintaining the intrinsic wetting behavior for many hours upon air exposure. Follow-up characterization shows that a nanometer-thick ice-like water forms on the graphitic surface, which remains stabilized at room temperature for at Least 2-3 h and thus significantly decreases the adsorption of airborne hydrocarbon on the graphitic surface. This method has potential implications in minimizing hydrocarbon contamination during manufacturing, characterization, processing, and storage of graphene/graphite-based devices. As an example, we show that a water-treated graphite electrode maintains a high level of electrochemical activity in air for up to 1 day.