Bio-inspired materials to control and minimise insect attachment

Bergmann, Johannes B.; Moatsou, Dafni; Steiner, Ullrich; Wilts, Bodo D.

doi:10.1088/1748-3190/ac91b9

Cited by 6 publications

(4 citation statements)

References 277 publications

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“…Adhesion on microrough surfaces has been a notorious problem for biological organisms, as smaller asperities introduce fine points that limit contact area. For organisms with fibrillar adhesives, such as geckos [31,32] or certain insects [33,34], this presents a relatively straightforward problem where the adhesive 'hairs' must be adapted to make proper contact on or in-between asperities. For organisms with soft adhesive pads (e.g.…”

Section: Materials Interactions For Sealingmentioning

confidence: 99%

Stickiness in shear: stiffness, shape, and sealing in bioinspired suction cups affect shear performance on diverse surfaces

Hernandez,

Sandoval,

Yuen

et al. 2024

Bioinspir. Biomim.

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Aquatic organisms utilizing attachment often contend with unpredictable environments that can dislodge them from substrates. To counter these forces, many organisms (e.g. fish, cephalopods) have evolved suction-based organs for adhesion. Morphology is diverse, with some disc shapes deviating from a circle to more ovate designs. Inspired by the diversity of multiple aquatic species, we investigated how bioinspired cups with different disc shapes performed in shear loading conditions. These experiments highlighted pertinent physical characteristics found in biological discs (regions of stiffness, flattened margins, a sealing rim), as well as ecologically relevant shearing conditions. Disc shapes of fabricated cups included a standard circle, ellipses, and other bioinspired designs. To consider the effects of sealing, these stiff silicone cups were produced with and without a soft rim. Cups were tested using a force-sensing robotic arm, which directionally sheared them across surfaces of varying roughness and compliance in wet conditions while measuring force. In multiple surface and shearing conditions, elliptical and teardrop shapes outperformed the circle, which suggests that disc shape and distribution of stiffness may play an important role in resisting shear. Additionally, incorporating a soft rim increased cup performance on rougher substrates, highlighting interactions between the cup materials and surfaces asperities. To better understand how these cup designs may resist shear, we also utilized a visualization technique (frustrated total internal reflection; FTIR) to quantify how contact area evolves as the cup is sheared.

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Section: Materials Interactions For Sealingmentioning

confidence: 99%

Stickiness in shear: stiffness, shape, and sealing in bioinspired suction cups affect shear performance on diverse surfaces

Hernandez,

Sandoval,

Yuen

et al. 2024

Bioinspir. Biomim.

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“…Historically, insects have provided a significant source for bioinspiration in engineered technologies [3][4][5][6] . The precise tuning of their sensory systems results from their physical anatomy and efficient encoding mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Mechanosensory representation of wing deformations

Yarger,

Maeda,

Siwanowicz

et al. 2024

Preprint

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Efficient representation of structural deformations is crucial for monitoring the instantaneous state of biological structures. Insects’ ability to encode wing deformations during flight demonstrates a general morphological computing principle applicable across sensory systems in nature as well as engineered systems. To characterize how relevant features are encoded, we measured and modelled displacement and strain across dragonfly wing surfaces in tethered and free flight. Functional interpretations were supported by neuroanatomical maps, and ablation and perturbation experiments. We find that signal redundancy is reduced by non-random sensor distributions and that morphology limits the stimulus space such that sensory systems can monitor natural states with few sensors. Deviations from the natural states are detected by a flexible population of additional sensors with many distinguishable activation patterns.

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“…They are still the subject of intense research as technological solutions needed in a changing global society to control and minimize the ability of insects to attach to plants. 7…”

Section: Introductionmentioning

confidence: 99%

“…They are still the subject of intense research as technological solutions needed in a changing global society to control and minimize the ability of insects to attach to plants. 7 In this frame, recent studies have demonstrated that nanoparticles of kaolin, zeolite, and calcium carbonate can affect the attachment ability of the Southern green stinkbug Nezara viridula (Hemiptera: pentatomidae), one of the most relevant pentatomid insect pests in the world, 8 to natural and artificial surfaces. 9,10 It is to be emphasized that the ability to firmly adhere to the surface along the whole life cycle is of pivotal importance for insect survival and reproductive success.…”

Section: Introductionmentioning

confidence: 99%