chapter  15
10 Pages

Wetting.the.Surface:.From.Self-Cleaning.Leaves.to.Energy.Storage.Devices

The.surface.is.an.important.part.of.virtually.every.physical.object.and.often.plays.an.overriding. role.in.many.processes,.beyond.just.connectivity.and.structural.support,.but.more.deeply.into.areas. involving. chemical. and. biological. interactions.. In. some. instances,. the. surface. provides. an. easy. entry.into.the.biological.or.chemical.systems;.in.others.it.protects.the.elements.surrounded.by.the. surfaces..An.ever-increasing.amount.of.surface-related.research.and.development.(R&D).work.is. being.performed.in.nearly.every.field.of.science..In.this.overview,.we.focus.our.attention.on.a.single. aspect.of.surface.properties:.its.topographical.heterogeneity.that.gives.rise.to.interesting.wetting. properties. of. naturally. occurring. biological. objects.. We. then. compare. how. this. phenomenon. is. implemented.in.a.variety.of.man-made.objects..It.will.also.be.shown.how.surface.roughness.modifies.wetting.of.solid.surfaces,.which.is.not.confined.to.the.droplets.rolling.off.the.surfaces.but.can. also.be.implemented.in.such.a.seemingly.unrelated.subject.as.a.novel.energy.storage.device.