Inspired by the recently reported translucency of monolayer graphene (GE) to wetting, atomistic simulations are employed to evaluate water flow enhancement induced by GE deposited on the inner surfaces of hydrophilic nanochannels. The flow in the coated channels exhibits a slip length of approximately 3.0 nm. Moreover, by contrasting the flow rates in channels with coated walls against flow rates in the corresponding uncoated channels, an “effective” flow enhancement from 3.2 to 3.7 is computed. The probability density function of the water dipole orientation indicates that the flow enhancement is related to a thinner structured water layer at the solid–liquid interface. This study provides quantitative evidence that GE employed as coating reduces substantially hydraulic losses in hydrophilic nanoconfinement.

受最近报道的单层石墨烯（GE）对润湿的半透明性的启发，采用原子模拟来评估由沉积在亲水性纳米通道内表面上的GE诱导的水流增强。涂覆通道中的流动表现出约3.0nm的滑移长度。此外，通过将带有涂层壁的通道中的流量与相应的未涂层通道中的流量进行对比，可以计算出从3.2到3.7的“有效”流量增强。水偶极子方向的概率密度函数表明，流动增强与固液界面较薄的结构化水层有关。这项研究提供了定量的证据，证明GE用作涂料可大大降低亲水性纳米约束的水力损失。