The present disclosure relates to gripping surfaces and devices comprising the same, wherein the gripping surface comprises a shape tunable surface microstructure, wherein the height, width and spatial periodicity of the microstructures corresponds to an integer multiple of Schallamach wave amplitudes and wavelengths of a target surface, wherein the device microstructures and induced Schallamach waves are entrained by applying strain to the device.

An adhesive strip including a support, a substrate and a plurality of fixing elements protruding from the substrate. The fixing elements and substrate are formed from a photo-curable adhesive composition that includes component A: a (meth)acrylate monomer or oligomer having at least two (meth)acrylate groups and having an average molecular weight M.sub.w from 700 g/mol to 7000 g/mol; component B: a (meth)acrylate monomer or oligomer having at least two (meth)acrylate groups and having an average molecular weight M.sub.w equal or greater than 150 g/mol and less than 700 g/mol; component C: a photoinitiator; and component D: a polythiol. A reclosable fastener can be formed with the adhesive strip such as a reclosable male-to-male adhesive based on a fastener having two adhesive strips.

A method of assembly of micro-scale objects includes forming a pattern of a first functional moiety on a surface of a substrate, contacting the surface of the substrate with a first liquid suspension including first micro-scale feedstock elements functionalized with a second functional moiety, complimentary to the first functional moiety, on first portions of the first micro-scale feedstock elements and functionalized with a third functional moiety on second portions of the first micro-scale feedstock elements, aligning the first portions of the first micro-scale feedstock elements with the surface of the substrate, and facilitating bonding the second functional moieties to the first functional moieties to form a first microstructure pattern of the first micro-scale feedstock elements on the surface of the substrate.

Systems and methods are provided for an electroactuated adhesion system containing a dry adhesive material and at least two patterned electrodes. The two or more patterned electrodes may be capable of promoting or increasing adhesion of the electroactuated adhesion system while simultaneously preventing or mitigating the accumulation of dust, contaminants, or particulates on the surface of the adhesive material.

A dry adhesive including a non-woven fabric of nanofibers comprising a polymeric material. The nanofibers include an average diameter within a range of from 50 nm to 10000 nm, and the non-woven fabric of nanofibers has a thickness within a range of from 0.1 μm to 100 μm. The dry adhesive has a shear adhesion strength that is higher than the normal adhesion strength. Additionally disclosed is a dry adhesive fiber mat including substantially aligned fibers extending lengthwise from a first region to a second region, each of the fibers having a diameter that is less than or equal to 10 microns. The dry adhesive fiber mat is selectively repositionable to, from, and between a mechanically interlocked state wherein the fibers at the first region are intimately positioned within void spaces between the fibers at the second region and a separated state not intimately positioned as such.

Gecko-like adhesive application devices suited for dynamic applications are disclosed, where the device can be easily applied to target substrates, exhibiting a firm hold, and subsequently released therefrom. Gecko-like adhesive application devices that are suited for sustained holding after easy application (e.g., on vertical or inclined surfaces or ceiling) also are disclosed.

A reversible adhesive apparatus includes a base and an adhesive layer. The base is configured with a series of concave and convex shapes at a top surface of the base according to some embodiments. The base is configured with a raised portion and a surrounding portion at a top surface of the base according to some other embodiments. The adhesive layer is disposed on top of the base. The adhesive layer configured to provide reversible adhesion on a top surface of the adhesive layer.

The present disclosure relates to gripping surfaces and devices comprising the same, wherein the gripping surface comprises a shape tunable surface microstructure, wherein the height, width and spatial periodicity of the microstructures corresponds to an integer multiple of Schallamach wave amplitudes and wavelengths of a target surface, wherein the device microstructures and induced Schallamach waves are entrained by applying strain to the device.

A structured surface has at least two types of projections which differ from one another at least in terms of their vertical height. As a result, the adhesion of the structured surface can be switched between at least three different states.

The invention provides a composite capable of achieving both excellent followability to an adherend and excellent adhesion. The composite has a support and a plurality of structures fixed to at least one surface of the support, and the structure has a shaft member consisting of a flexible material extending from a proximal end fixed to the support, and an adhesive part arranged at a distal end of the shaft member.