Ion and water transport in charge-modified graphene nanopores
Qiu Ying-Hua, Li Kun, Chen Wei-Yu, Si Wei, Tan Qi-Yan, Chen Yun-Fei†
       
(a) Current through nanopores versus pore charge, (b) percent of Cl ion current to the total current versus pore charge ( e is elementary charge). The positive and negative numbers on the horizontal axis correspond to positive and negative charges on the pores.