Correction to: NPG Asia Materials

https://doi.org/10.1038/am.2016.99 published online 22 July 2016

In Results and discussion, ‘…, frequency doubled 532 nm YAG laser…’ should read ‘…, frequency doubled 532 nm laser…’.

The authors had misrecognized one of the product specifications of the laser used for the experiments. However, it has no effects on the experimental results, discussions, and conclusions. The authors apologize for any inconvenience caused.

The original article has been corrected.