From cleaning contaminated water and reducing energy consumption in buildings to extending the service life of metals and protecting critical magnetic materials, many of today's technological challenges share a common characteristic: success is often determined by what happens at the surface. While bulk material properties remain centrally important mechanically, the control of surface chemistry, morphology and interfacial processes are increasingly important in governing how materials function through interaction with their environment. As demands grow for greater efficiency, durability and sustainability, advances in surface engineering continue to provide innovative solutions across a broad range of technologies.
The articles featured in this issue demonstrate how targeted control of surfaces and interfaces can deliver substantial improvements in performance. Although the applications span environmental technologies, energy-efficient devices, corrosion protection and advanced functional materials, a common theme emerges – careful manipulation of surface structure and composition enabling the materials to perform beyond the limitations of their untreated counterparts.
Environmental sustainability provides the focus of an excellent contribution from Sun et al.,1 who report a durable superhydrophobic fabric manufactured using a UV-induced surface modifier for oil–water separation. Oil contamination and the treatment of oily wastewater remain significant global challenges, creating demand for robust, scalable and reusable separation technologies. Through the development of a novel n-octadecanethiol divinyltetramethyldisilazane surface modifier, the authors demonstrate how strong covalent attachment to textile fibers can generate a durable superhydrophobic surface that maintains exceptional oil–water separation performance even after repeated use and exposure to ultraviolet irradiation, organic solvents and mechanical abrasion. Beyond the impressive technical performance, the study illustrates how surface chemistry can contribute practical solutions to environmental protection and resource recovery challenges.
A second contribution by Gong et al.2 highlights the important role surface engineering can play in improving energy efficiency. Their work explores graphdiyne-doped tungsten trioxide films for electrochromic smart window applications. By incorporating graphdiyne during hydrothermal synthesis, the authors induce significant changes in crystal structure and morphology, transforming conventional tungsten oxide into a hexagonal nanoflower architecture with enhanced charge transfer and ion diffusion characteristics. The resulting films exhibit high optical modulation, rapid coloring and bleaching behavior, and excellent cycling stability. This study demonstrates how nanoscale control of surface structure can unlock improved functionality in electrochromic materials and support the development of next-generation smart window technologies for energy-efficient buildings.
Corrosion protection remains one of the most significant drivers for innovation in surface engineering, particularly as industry seeks lighter, longer-lasting structural materials. In this issue, Liu et al.3 investigate the influence of ethylenediaminetetraacetic acid on micro-arc oxidation coatings formed on 6061 aluminum alloy. The authors show that careful control of electrolyte composition can significantly modify coating growth, producing denser ceramic layers with improved hardness, wear resistance and corrosion protection. Particularly impressive is the substantial reduction in corrosion current density and improved performance during prolonged salt spray testing. This work provides valuable insight into how relatively simple modifications to coating chemistry can deliver meaningful improvements in protection and durability for engineering alloys operating in aggressive environments.
The journal issue concludes with another noteworthy study addressing corrosion protection, this time for Nd–Fe–B permanent magnets. These materials underpin many technologies ranging from electric motors and robotics to energy conversion systems, yet their long-term performance remains vulnerable to environmental degradation. Sun et al.4 examine the role of sodium hypophosphite during electroless deposition of nickel–phosphorus coatings and show how the concentration of reducing agent influences coating nucleation, phosphorus incorporation and defect formation. By identifying an optimum concentration, the authors achieve dense amorphous coatings that display enhanced corrosion resistance, improved adhesion and minimal impact on magnetic properties. Their findings provide important insight into the relationship between deposition chemistry, coating microstructure and functional performance in advanced magnetic materials.
Although these contributions address very different applications, together they reinforce a common principle – advances in material performance frequently originate from advances at interfaces. Whether enabling efficient oil–water separation, improving the energy performance of buildings, extending the lifetime of lightweight alloys or protecting critical magnetic materials, surface engineering provides powerful opportunities to tailor functionality without fundamentally altering the bulk material itself. In this way, the mechanical considerations of the materials used for specific applications are untouched, with the overall functioanlity of the materials used being enhanced through surface modification. The ability to control chemistry, structure and transport processes at the surface remains one of the most effective strategies for developing materials capable of meeting the technological and environmental demands of the future.
I thank the authors for their contributions to this issue and to the journal more widely, the reviewers for their time and expertise, and our readers for their continued support of Surface Innovations. While the papers presented in this issue provide an excellent snapshot of current activity across the field, innovation continues at a rapid pace. Readers are encouraged to explore newly accepted articles through Emerald EarlyCite, which provides online access to the latest research before assignment to a journal issue, enabling the community to engage quickly with emerging developments and discoveries.
I hope the studies featured here stimulate new ideas, foster new collaborations and inspire further innovation across the broad and evolving landscape of surface and interface science.
