A tunable morphing polyelectrolyte system for smart ocular applications

Sun, Ansu, Sridhar, Sreepathy, Chen, Sherry, Li, Yifan and Xu, Bin (2021) A tunable morphing polyelectrolyte system for smart ocular applications. In: Transducers 2021: 21st International Conference on Solid-State Sensors, Actuators and Microsystems. IEEE, Piscataway, NJ, pp. 1464-1467. ISBN 9781665448451, 9781665412674

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Official URL: https://doi.org/10.1109/Transducers50396.2021.9495...


For the first time, a focal-length tunable intra-ocular lens (IOL) device has been realized by a standard-shaped, homogeneous “one material” system. Different to existing technologies, this poly(N-isopropylacrylamide) gel (PNIPAM) based polyelectrolyte system doesn’t require any additional materials (e.g. metal electrodes, movable mechanical structures) to achieve a controllable lens shape transformation for the focal-length shifting actuation. The designed morphological deformation mechanism employs ionic-strength responsive mechanical buckling via controlled swelling of PNIPAM in phosphate buffered saline (PBS) with similar concentration to human eye liquid. This unique approach will unlock great potential in a wide range of smart ocular applications.

Item Type: Book Section
Additional Information: This work was supported by EPSRC UK Fluid Network (grant no. EP/N032861, https://fluids.ac.uk/). The authors would also like to acknowledge other support from the EPSRC (grant Nos. EP/N007921 and EP/L026899). Data associated with this article are available via Northumbria Research Data Management scheme.
Uncontrolled Keywords: PNIPAM, PNIPAAm, responsive polymer, intraocular lens, focal length, swelling
Subjects: F200 Materials Science
F300 Physics
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: John Coen
Date Deposited: 10 May 2021 11:35
Last Modified: 07 Oct 2021 14:00
URI: http://nrl.northumbria.ac.uk/id/eprint/46123

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