Correction to: Scientific Reports https://doi.org/10.1038/s41598-018-29065-7, published online 17 July 2018

The Acknowledgements section in this Article is incomplete.

“We gratefully acknowledge the financial support from New York University Abu Dhabi (NYUAD) through the NYUAD Research Enhancement Fund as well as the ADEK Award for Research Excellence 2015 (Award number: AARE-073). The device fabrication was conducted in the microfabrication core facility of NYUAD.”

should read:

“We gratefully acknowledge the financial support from New York University Abu Dhabi (NYUAD) through the NYUAD Research Enhancement Fund as well as the ADEK Award for Research Excellence 2015 (Award number: AARE-073). The device fabrication was conducted in the microfabrication core facility of NYUAD.

V.S. Pham and Q.V. Do are funded by Vietnam National Foundation for Science and Technology Development (NAFOSTED) under grant number 107.03-2016.11.”