摘要：Discriminating between different liquids using surfaces with special wettability holds significant implications for both fundamental research and practical ***,current differentiation surfaces still struggle with challenges such as complex microstructure design,a limited detection range,and poor *** this study,we present a new platform for droplet discrimination achieved through a combination of groove structures and a liquid-like polydimethylsiloxane(PDMS)brushes *** PDMS brushes coating exhibits excellent stability and low adhesion across a wide range of liquids with surface tensions ranging from 27.5 to 72.8 mN/m,while the groove structure provides distinct energy barriers for droplet ***,liquids with varying surface tensions can be effectively discriminated,as evidenced by the increased sliding angles(SAs)observed as liquids with lower surface tension moving across the ***,we utilized a three dimensional(3D)model of the droplet developed using Surface Evolver,and conducted energy variation calculations during droplet sliding across the groove to analyze the SA differences among liquids with different surface ***,we proposed two simple differentiation platforms that successfully demonstrated effective droplet *** work introduces a novel strategy for droplet discrimination,offering innovative ideas for the design of functional *** findings may potentially be applied in other fields involving droplet manipulation,such as droplet-based microchemical reactions and bio-detection.

摘要：Osmotic energy between river water and seawater has attracted interest as a new source of sustainable *** membranes in a reverse electrodialysis configuration can capture energy from salinity ***,current membrane materials suffer from high resistances,low stabilities,and low charge densities,which limit their further ***,we designed a high-performance nanofluidic membrane using carboxylic cellulose nanofibers functionalized with graphene oxide nanolamellas with cement-and-pebble microstructures and stable skeletons for enhanced ion transmembrane *** mixing artificial river water and seawater,the composite membrane achieved a high output power density up to 5.26 W m^(−2).Additionally,the membrane had an excellent acid resistance,which enabled long-term use with over 67 W m^(−2) of power *** performance of this composite membrane benefited from the mechanically strong cellulose fibers and the bonding between nanofibers and *** this work,we highlight promising directions in industrial waste treatment using energy extracted from chemical potential gradients.

摘要：Recently,smart superwetting porous materials have aroused much attention,and it is well known that tunable surface wettability and pore structure/size are extremely important for their ***,only one factor can be regulated on existing materials,which significantly restricts their controllability,functions,and applications.A new material was prepared by electrodepositing a layer of polypyrrole on a shape memory sponge,on which switchable superhydrophobicity/superhydrophilicity and adjustable pore size within the range of about 28 nm to 895μm can be *** synergistically tuning the wettability and pore size,both ON/OFF water permeation and accurate flux can be ***,we also applied the sponge for molecule release,and diverse release manners with precise/smart controllability can be *** paper reports for the first time a smart material with controllability in both surface wetting and pore size,which provides a new strategy for the preparation of novel smart superwetting porous materials.

摘要：Smart-controlled surface wettability from superhydrophilicity to superhydrophobicity has been extensively explored,and stimulus-responsive strategies have been widely accepted as a useful method to realize ***,achieving smart and precise wetting control remains challenging because most previous studies focused on stimulating single surface chemistry or ***,a dualstimulus-responsive strategy that can synergistically stimulate surface chemistry and microstructures is demonstrated on the pH-responsive molecule poly(2-(diisopropylamino)ethyl methacrylate(PDPAEMA)-modified temperature-triggered shape memory polymer(SMP)*** responsive PDPAEMA and SMP can provide the surface with tunable surface chemistry and microstructures,***,the wetting of the surface between various states can be reversibly and precisely controlled from superhydrophilicity to superhydrophobicity with contact angle(CA)differences of less than 15° under the cooperative effect between the adjustable surface microstructure and *** surface is further utilized as a platform to create gradient wettings based on its excellent ***,this work presents a strategy for surface wetting control by combining tunable surface microstructures and *** prepared samples with a special wetting controllability can be applied to numerous fields,including adaptive liquid microlenses,accurate drug release,and selective *** work also proposes novel expectations in designing smart functional surfaces.

摘要：Tissue implant-related infections are among the most serious complications after surgical implantation,including orthopedics and *** with antibacterial ion release systems are efficient and economical antibiotic substitutes to fight against bacterial ***,the excessive amount of released antibacterial ions may cause biological toxicity while killing *** raises a fundamental issue on how to properly control the amounts of ions and their ***,we develop low-dose antibacterial ions-incorporated ferroelectric implants(copper-doped potassium sodium niobate,K0.5Na0.5NbO3-Cu,KNNCu)whose surface potential can be tuned via external *** released Cu2+ions can be targeted to bacteria via endogenous electric field(EEF)between KNNCu implants and negatively charged ***,the antibacterial efficacy of the implants is determined by the amount of Cu^2+ions that reaches bacteria,instead of the total amount of released Cu2+*** amount of Cu2+ions reaching bacteria from the high-surface-potential implant is 2.4 times that from the lowsurface-potential implant within 12 h,resulting in the increased antibacterial ratio from about 65%to 100%,while remaining low cell *** work provides insights into the specific role of the EEF in guiding mass transport between charged materials and living organisms,and a new perspective for the design of high-performance antibacterial biomaterials.