About the Authors

David M. Benton

d.benton@aston.ac.uk

Affiliation Aston Institute of Photonic Technologies, Aston University, Aston Triangle, Birmingham, United Kingdom

Competing Interests

The author has declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: DMB. Performed the experiments: DMB. Analyzed the data: DMB. Contributed reagents/materials/analysis tools: DMB. Wrote the paper: DMB.