Inspired by the unique structural design of diaspores of flowering plants, hook-and-loop fasteners have been developed to offer strong bonding, reusability, andlow maintenance requirements. However, conventional hook-and-loop fastenersalso require a significant separation force for release. Herein, a 3D hook-and-loopfastener made of a shape memory polymer (SMP) is presented. The SMP hookpatch with an array of microhooks is fabricated using projection microstereoli-thography (PμSL) and molding. The robust bonding of the hook-and-loop fas-tener is demonstrated at room temperature, and a significant reduction inseparation force when heated, enabling on-demand easy separation of the hook-and-loop fastener through temperature control. Moreover, the deformation of theSMP hooks that occurs during separation can be recovered by heating, allowingfor repeated uses. The SMP hook-and-loop fastener with tunable bond strengthholds great potential for applications in various industrial fields that require easyassembly, robust bonding, and on-demand release with low separation force.

Nanofluidic systems have garnered considerable attention in research due to their distinctive physical characteristics and the challenges they present in microfluidic applications. The fabrication of nanostructures within these systems has emerged as a critical research area, because of their critical importance. As nanofabrication research advances, the demand for cost-effective, high throughput methods has increased, highlighting the necessity for fabrication techniques that do not depend on complex cleanroom facilities. In this paper, we present a straightforward yet effective and economical method for creating nanostructures over large areas using only a conventional 3D printer. Our proposed two-step approach includes a 3D printing step followed by a simple thermomechanical deformation step. We demonstrate the successful generation of nanopores across extensive areas, verified through SEM imaging and quantitative pore size measurements. Furthermore, we utilized the fabricated nanopore structure to demonstrate overlimiting responses and a nanofluidic diode, which indicates the presence of nanostructures. While the repeatability and reproducibility are relatively lower than ones fabricated by sophisticated nanofabrication techniques, we expect that this research will significantly lower the barriers associated with advanced nanofabrication facilities, thereby promoting progress in nanoengineering research.