Abstract
The flexoelectric coefficients e 1 and e 3 for splay and bend are measured using two experiments. The first experiment measures the sum (e 1 + e 3) using a π-cell and applying an ac voltage across the device. The second experiment measures the difference (e 1 − e 3) using a TN-cell and applying an in-plane quasi-dc voltage.
Acknowledgments
The authors would like to thank the EPSRC for funding the project and MERCK for supplying materials and devices. LAP-J would also like to acknowledge the Royal Society for funding.