Correction to: NPG Asia Materials https://doi.org/10.1038/s41427-018-0024-7; Article published online 11 April 2018

After online publication of this article, the authors noticed an error in the supplementary information section in the manuscript.

The correct supplementary table of this article should have read as below.

“In Table S1, column of the contact angle, the “4.824” of Normal 7 and “6.310” of Normal 8 should revise as “108.7” of Normal 7 and “101.6” of Normal 8, respectively.”

The authors apologize for any inconvenience caused.

Table 1