Slip-Effect Functional Air Filter for Efficient Purification of PM_2.5.

6d , the variation of pressure drop showed a trend of gradual decrease with the decrease of pore size ( Supplementary Fig.

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Interestingly, the PAN membranes with average filtration efficiency of 66–68% and 86–88% first exhibited a distinct decrease of pressure drop with the reduction of fiber diameter from 168 to 71 nm and subsequently showed an increasing trend (as shown in Fig. 6b ).

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