Massachusetts Institute of Technology

Srinivas Prasad Bengaluru Subramanyam

Kripa K Varanasi

J David Smith

Sushant Anand

Konrad Rykaczewski

Konrad Rykaczewksi

In certain embodiments, the invention is directed to apparatus comprising a liquid-impregnated surface, said surface comprising an impregnating liquid and a matrix of solid features spaced sufficiently close to stably contain the impregnating liquid therebetween or therewithin, and methods thereof. In some embodiments, one or both of the following holds: (i) 0<ϕ≤0.25, where ϕ is a representative fraction of the projected surface area of the liquid-impregnated surface corresponding to non-submerged solid at equilibrium; and (ii) S<0, where Sis spreading coefficient, defined as γ−γ−γ, where γ is the interfacial tension between the two phases designated by subscripts w, a, and o, where w is water, a is air, and o is the impregnating liquid.

Apparatus and methods employing liquid-impregnated surfaces

In certain embodiments, the invention is directed to apparatus comprising a liquid-impregnated surface, said surface comprising an impregnating liquid and a matrix of solid features spaced sufficiently close to stably contain the impregnating liquid therebetween or therewithin, and methods thereof. In some embodiments, one or both of the following holds: (i) 0&#x3c;&#x3d5;&#x2264;0.25, where &#x3d5; is a representative fraction of the projected surface area of the liquid-impregnated surface corresponding to non-submerged solid at equilibrium; and (ii) S&#x3c;0, where Sis spreading coefficient, defined as &#x3b3;&#x2212;&#x3b3;&#x2212;&#x3b3;, where &#x3b3; is the interfacial tension between the two phases designated by subscripts w, a, and o, where w is water, a is air, and o is the impregnating liquid.

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Cambridge, MA, United States of America

Srinivas Prasad Bengaluru Subramanyam