Wettability plays a vital role in fundamental researches and practical applications.Wettability control and patterning have been widely studied in various fields.Although researches have grown rapidly,the methods are ...Wettability plays a vital role in fundamental researches and practical applications.Wettability control and patterning have been widely studied in various fields.Although researches have grown rapidly,the methods are still restricted by limitations including complicated processes,high equipment requirements and shortage of methods to treat complex surfaces.Here we report a simple,low cost,array-based wettability control and patterning method via in-situ modification by flexible plasma stamp.Wettability control and patterning on surfaces of superhydrophobic aluminum,superhydrophobic PDMS and silicon,even plant leaf and fruit are achieved.The relationships between the wettability and the treatment time are investigated.We elucidate that the wetting states can also be reversible.The surface modification mechanism of in-situ plasma treatment is further investigated.Utilizing the step by step treatment,gradient and arbitrary wettability patterning on surfaces have been obtained.Notably,the patterned wettability on the inner surface of a tube has been realized,which has never been reported.Finally,in-situ wettability patterning is applied to achieve microfluidics channels on the inner surface of superhydrophobic tube.This work will bring new insights into the study of wetting field and stimulate more applications on wettability control and patterning.展开更多
Ultrashort pulsed laser-induced periodic surface structures(LIPSS)can be generated on difFerent kinds of materials,which are widely utilized for modifying surface properties such as wettability,adhesion,and tribologic...Ultrashort pulsed laser-induced periodic surface structures(LIPSS)can be generated on difFerent kinds of materials,which are widely utilized for modifying surface properties such as wettability,adhesion,and tribological,as well as optical performances.Previous studies have focused mainly on one-dimensional LIPSS(i.e.,line structure)generation.In this study,a picosecond pulsed laser was used to irradiate stainless-steel surfaces for generating two-dimensional LIPSS,namely nanodot structures,by cross-scanning the laser beam for a different number of times.The obtained nanodot structures were found to be super hydrophilic just after laser irradiation,but turned to be hydrophobic after exposure in air for a few days.By cross・scanning the laser beam for the same number of times,local LIPSS rewriting was realized.This study showed the possibility of improving the homogeneity of the surface properties of steel materials through laser-induced nanodot structuring.展开更多
基金This work was supported by the NSFC(Grant Nos.51975215,11504111,and 61574060)the Science and Technology Commission of Shanghai Municipality(Project No.19511120100)the financial support from the initial funding for scientific research of East China Normal University.
文摘Wettability plays a vital role in fundamental researches and practical applications.Wettability control and patterning have been widely studied in various fields.Although researches have grown rapidly,the methods are still restricted by limitations including complicated processes,high equipment requirements and shortage of methods to treat complex surfaces.Here we report a simple,low cost,array-based wettability control and patterning method via in-situ modification by flexible plasma stamp.Wettability control and patterning on surfaces of superhydrophobic aluminum,superhydrophobic PDMS and silicon,even plant leaf and fruit are achieved.The relationships between the wettability and the treatment time are investigated.We elucidate that the wetting states can also be reversible.The surface modification mechanism of in-situ plasma treatment is further investigated.Utilizing the step by step treatment,gradient and arbitrary wettability patterning on surfaces have been obtained.Notably,the patterned wettability on the inner surface of a tube has been realized,which has never been reported.Finally,in-situ wettability patterning is applied to achieve microfluidics channels on the inner surface of superhydrophobic tube.This work will bring new insights into the study of wetting field and stimulate more applications on wettability control and patterning.
文摘Ultrashort pulsed laser-induced periodic surface structures(LIPSS)can be generated on difFerent kinds of materials,which are widely utilized for modifying surface properties such as wettability,adhesion,and tribological,as well as optical performances.Previous studies have focused mainly on one-dimensional LIPSS(i.e.,line structure)generation.In this study,a picosecond pulsed laser was used to irradiate stainless-steel surfaces for generating two-dimensional LIPSS,namely nanodot structures,by cross-scanning the laser beam for a different number of times.The obtained nanodot structures were found to be super hydrophilic just after laser irradiation,but turned to be hydrophobic after exposure in air for a few days.By cross・scanning the laser beam for the same number of times,local LIPSS rewriting was realized.This study showed the possibility of improving the homogeneity of the surface properties of steel materials through laser-induced nanodot structuring.
