@article {837591,
	title = {Dynamic polymer systems with self-regulated secretion for the control of surface properties and material healing},
	journal = {Nat. Mater.},
	volume = {14},
	year = {2015},
	note = {The work was supported by the DoE under award $\#$ DE-SC0005247 (polymer synthesis and self-repair) and the DoD Office of Naval Research under award N00014-11-1-0641 (wetting and anti-fouling properties). We thank J. Alvarenga for his help with the flow-cell design and measurements, and Y. Hu and M. Aizenberg for discussion.},
	pages = {790-795},
	abstract = {Approaches for regulated fluid secretion, which typically rely on fluid encapsulation and release from a shelled compartment, do not usually allow a fine continuous modulation of secretion, and can be difficult to adapt for monitoring or function-integration purposes. Here, we report self-regulated, self-reporting secretion systems consisting of liquid-storage compartments in a supramolecular polymer-gel matrix with a thin liquid layer on top, and demonstrate that dynamic liquid exchange between the compartments, matrix and surface layer allows repeated, responsive self-lubrication of the surface and cooperative healing of the matrix. Depletion of the surface liquid or local material damage induces secretion of the stored liquid via a dynamic feedback between polymer crosslinking, droplet shrinkage and liquid transport that can be read out through changes in the system{\textquoteright}s optical transparency. We foresee diverse applications in fluid delivery, wetting and adhesion control, and material\&nbsp;self-repair.},
	doi = {10.1038/nmat4325},
	url = {https://www.nature.com/articles/nmat4325},
	author = {Cui, J. and D. Daniel and Grinthal, A. and K. Lin and Aizenberg, J.}
}
