Bioinspired Adhesive Mechanisms and Applications

Biological organisms have evolved a remarkable variety of adhesion strategies that allow reversible, strong attachment to diverse substrates under dry, wet or contaminated conditions. These strategies often exploit hierarchical surface architectures, from macroscopic pads to microscopic fibrils or microcups, to maximise contact area and control interfacial forces. Key principles include directional adhesion through anisotropic structures, capillarity and wet adhesion aided by secreted fluids, van der Waals interactions at nanoscales, and suction-like mechanisms in soft tissues. Translating these concepts into engineering has led to adhesives for soft robotics, wearable haptic interfaces, medical devices, microassembly and underwater manipulation. Advances in materials synthesis, microfabrication and smart control systems now enable switchable, self‐healing and adaptive adhesives that can conform to complex geometries, sense their environment and modulate attachment on demand. Such innovations promise sustainable, energy-efficient solutions for gripping, mobility and surface functionalisation across biomedical, industrial and consumer technologies.

Research from Nature Portfolio

Recent studies have reproduced insect footpad strategies by creating fibrillar adhesive arrays with integrated pore networks. These synthetic pads combine capillarity and humidity-induced softening to enhance pull-off forces by two orders of magnitude and to maintain adhesion independent of preload. The work demonstrates how controlled liquid transport and nanoscale contact splitting can be harnessed for robust, reversible adhesion in variable environmental conditions. In parallel, research on insect-inspired attachment devices has shown that the combination of claw-like microhooks and soft adhesive pads yields superior performance on rough and inclined terrains. Artificial prototypes mimic the frictional self-locking of claws for small curvatures, while adhesive pads provide large contact areas on flatter surfaces. The synergy between these two elements produces attachment forces exceeding those of either mechanism alone, offering new design rules for versatile gripping systems.

Bioinspired Adhesive Mechanisms and Applications publication trend

The graph below shows the total number of articles in bioinspired adhesive mechanisms and applications across all publications each year (not limited to Nature Index journals).

Technical terms

Hierarchical surface architecture: Multiscale structures combining macro-, micro- and nanoscale features to optimise contact and adhesion strength.

Fibrillar adhesion: Reversible attachment based on arrays of fine fibers or setae that conform to surface irregularities and maximise real contact area.

Capillarity: Adhesion arising from liquid bridges at the interface, exploiting surface tension and wetting phenomena.

Directional adhesion: Anisotropic contact structures that adhere strongly in one direction while releasing easily in the opposite direction.

Electroactive polymer: A material that changes shape or mechanical properties in response to an electric field, enabling active control of adhesion.

References

1. Super‐adaptive electroactive programmable adhesive materials to challenging surfaces: From intelligent soft robotics to XR haptic interfaces. InfoMat (2024).
2. Humidity-enhanced wet adhesion on insect-inspired fibrillar adhesive pads. Nature Communications (2015).
3. The synergy between the insect-inspired claws and adhesive pads increases the attachment ability on various rough surfaces. Scientific Reports (2016).
4. Octopus-inspired adhesive skins for intelligent and rapidly switchable underwater adhesion. Science Advances (2022).
5. Functional surface microstructures inspired by nature – From adhesion and wetting principles to sustainable new devices. Progress in Materials Science (2021).