Correction to: Scientific Reports https://doi.org/10.1038/s41598-017-17391-1, published online 07 December 2017

The Acknowledgements section in this Article is incorrect.

“This work was undertaken at the University of Nottingham funded by the Engineering and Physical Sciences Research Council (EPSRC) through the grants EP/I033335/2 “EPSRC Centre for Innovative Manufacturing in Additive Manufacturing” and EP/N024818/1 “Formulation for 3D Printing”, and by the Air Force Office of Scientific Research (AFOSR) through award FA9550-14-1-0048. ES wants to acknowledge the EPSRC grant for the Kratos LiPPS XPS instrument EP/K005138/1.”

should read:

“This work was supported by the Engineering and Physical Sciences Research Council [grant number EP/I033335/2, EP/N024818/1, EP/K005138/1]; the Air Force Office of Scientific Research (AFOSR) [grant number FA9550-14-1-0048].”