Collective wetting transitions of submerged gas-entrapping microtextured surfaces  

作　　者：Sankara Arunachalam Himanshu Mishra 

机构地区：[1]Environmental Science and Engineering Program,Biological and Environmental Sciences and Engineering Division,King Abdullah University of Science and Technology(KAUST),Thuwal,Kingdom of Saudi Arabia [2]Water Desalination and Reuse Center,King Abdullah University of Science and Technology(KAUST),Thuwal,Kingdom of Saudi Arabia

出　　处：《Droplet》2024年第3期102-106,共5页液滴（英文）

摘　　要：Numerous natural and industrial processes entail the spontaneous entrapment of gas/air as rough/patterned surfaces are submerged under water.As the wetting transitions ensue,the gas diffuses into the water leading to the fully water-filled state.However,the standard models forwetting do not accountfor the microtexture’s topography on collective wetting transitions.In other words,it is not clear whether the lifetime of n cavities arranged in a one-dimensional(I-D)line or a two-dimensional(II-D)(circular or square)lattice would be the same or not as a single 0-D cavity.In response,we tracked the time-dependentfates of gas pockets trapped in I-D and II-D lattices and compared them with wetting transitions in commensurate 0-D cavities.Interestingly,the collective wetting transitions in the I-D and the II-D arrays had a directionality such thatthe gas from the outermost cavities was lostthe first,while the innermost gotfilled by water the last.In essence,microtexture’s spatial organization afforded shielding to the loss of the gas from the innermost cavities,which we probed as a function of the microtexture’s pitch,surface density,dimensionality,and hydrostatic pressure.These findings advance our knowledge of wetting transitions in microtextures and inspiring surface textures to protect electronic devices against liquid ingression.

关 键 词：TOPOGRAPHY TRANSITIONS SUBMERGED 

分 类 号：O35[理学—流体力学]