To fill the gap in the measurement of large diameter single-wall carbon nanotube (SWCNT) and further predict the variation rule of mass flux versus diameter, this work measured the water flow velocity and mass flux coefficient in an individual SWCNT with a 3.07 nm diameter. A mechanical method is used to obtain the large diameter SWCNT by removing the internal tube of a double-wall carbon nanotube, and then the water flow velocity through this SWCNT was measured by an electrical method. The water flow velocity of large diameter SWCNT can reach to 146.1 32.5 μm s⁻¹, and the enhancement factor compared with no-slip Hagen–Poiseuille relation is about 14.5. A mass flux coefficient is defined to describe the mass flow ability through SWCNT and calculated by the experiment data. Although the enhancement factor decreased to ∼1/4 of the normal size SWCNT (∼1.5 nm), the mass flux coefficient in the large diameter SWCNT increased efficiently, and which is about 5.7 times to the normal size SWCNT. Based on the above measurement result, a reported simulation result can be revised and then verified to describe the enhancement factor versus diameter, and the mass flux coefficient of the SWCNT can be further predicted. According to the prediction result, in the bulk-like liquid region, the mass flux of an individual SWCNT can reach to maximum when the diameter is around 2.9 nm, which would provide a new idea for the design of the SWCNT-based nanodevices in the future.

为了填补大直径单壁碳纳米管（SWCNT）测量中的空白并进一步预测质量通量随直径的变化规律，这项工作测量了直径为3.07 nm的单个SWCNT中的水流速和质量通量系数。 。使用机械方法通过去除双壁碳纳米管的内管来获得大直径SWCNT，然后通过电学方法测量通过该SWCNT的水流速。大直径SWCNT的水流速可达到146.1 32.5 μ米每秒^-1，与无滑移哈根-泊苏伊关系相比，增强因子约为14.5。定义质量通量系数以描述通过SWCNT的质量流动能力，并通过实验数据进行计算。尽管增强因子减小到正常尺寸SWCNT的约1/4（约1.5 nm），但大直径SWCNT中的质量通量系数有效提高，约为正常尺寸SWCNT的5.7倍。基于上述测量结果，可以对报告的仿真结果进行修改，然后进行验证，以描述增强因子与直径的关系，从而可以进一步预测SWCNT的质量通量系数。根据预测结果，在大块状液体区域中，当直径约为2.9 nm时，单个SWCNT的质量通量可以达到最大，