Scalable Gecko‐Inspired Adhesives via Diffraction‐Grated Molds: A Low‐Cost, Directional PDMS System
Article Swipe
Motaz Hassan
,
Ajay Mahajan
,
Xiaosheng Gao
,
D. Dane Quinn
,
Siamak Farhad
·
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.1002/eng2.70352
YOU?
·
· 2025
· Open Access
·
· DOI: https://doi.org/10.1002/eng2.70352
Geckos achieve exceptional adhesion through hierarchical micro/nanoscale setae exploiting van der Waals forces, a mechanism challenging to replicate synthetically due to fabrication complexity. This study presents a cost‐effective, lithography‐free method for gecko‐inspired adhesives by casting PDMS onto commercial diffraction‐grated sheets. The resulting microstructure exhibits directional adhesion, passive detachment, and a non‐adhesive default state. Shear and peel tests across 8.06–103.23 cm 2 contact areas demonstrated a maximum shear stress of 19.10 kPa (supporting up to 7.105 kg) and peel forces below 1 N at 90°, confirming controlled release. Durability testing showed performance recovery after contamination and cleaning, ensuring reusability. The fabrication method eliminates cleanroom requirements, using RTV silicone, 3D‐printed fixtures for rapid, scalable prototyping, and diffraction‐grated molds. Current limitations include single‐level microstructures and absent nanoscale features, reducing efficacy on varying surface structures. Future work will integrate resin‐printed molds to introduce wedge‐shaped/angled structures and microporous filters for nanoscale fidelity, aiming to develop hierarchical adhesives that rival state‐of‐the‐art systems. These advancements target high performance while maintaining affordability and scalability for diverse applications, from robotics to industrial automation. By bridging the gap between biological inspiration and manufacturable design, this approach offers a practical pathway toward reusable, high‐capacity adhesives with broad real‐world utility.
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- Landing Page
- https://doi.org/10.1002/eng2.70352
- OA Status
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- 60
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- https://openalex.org/W4414587507
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https://doi.org/10.1002/eng2.70352Digital Object Identifier
- Title
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Scalable Gecko‐Inspired Adhesives via Diffraction‐Grated Molds: A Low‐Cost, Directional
PDMS SystemWork title - Type
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articleOpenAlex work type
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enPrimary language
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2025Year of publication
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2025-09-28Full publication date if available
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Motaz Hassan, Ajay Mahajan, Xiaosheng Gao, D. Dane Quinn, Siamak FarhadList of authors in order
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https://doi.org/10.1002/eng2.70352Publisher landing page
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goldOpen access status per OpenAlex
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https://doi.org/10.1002/eng2.70352Direct OA link when available
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| abstract_inverted_index.utility. | 198 |
| abstract_inverted_index.adhesion, | 46 |
| abstract_inverted_index.adhesives | 33, 152, 194 |
| abstract_inverted_index.cleaning, | 96 |
| abstract_inverted_index.cleanroom | 103 |
| abstract_inverted_index.features, | 125 |
| abstract_inverted_index.fidelity, | 147 |
| abstract_inverted_index.integrate | 135 |
| abstract_inverted_index.introduce | 139 |
| abstract_inverted_index.mechanism | 15 |
| abstract_inverted_index.nanoscale | 124, 146 |
| abstract_inverted_index.practical | 189 |
| abstract_inverted_index.replicate | 18 |
| abstract_inverted_index.resulting | 42 |
| abstract_inverted_index.reusable, | 192 |
| abstract_inverted_index.silicone, | 107 |
| abstract_inverted_index.Durability | 88 |
| abstract_inverted_index.biological | 180 |
| abstract_inverted_index.commercial | 38 |
| abstract_inverted_index.confirming | 85 |
| abstract_inverted_index.controlled | 86 |
| abstract_inverted_index.eliminates | 102 |
| abstract_inverted_index.exploiting | 9 |
| abstract_inverted_index.industrial | 173 |
| abstract_inverted_index.structures | 141 |
| abstract_inverted_index.(supporting | 72 |
| abstract_inverted_index.automation. | 174 |
| abstract_inverted_index.challenging | 16 |
| abstract_inverted_index.complexity. | 23 |
| abstract_inverted_index.detachment, | 48 |
| abstract_inverted_index.directional | 45 |
| abstract_inverted_index.exceptional | 3 |
| abstract_inverted_index.fabrication | 22, 100 |
| abstract_inverted_index.inspiration | 181 |
| abstract_inverted_index.limitations | 118 |
| abstract_inverted_index.maintaining | 163 |
| abstract_inverted_index.microporous | 143 |
| abstract_inverted_index.performance | 91, 161 |
| abstract_inverted_index.scalability | 166 |
| abstract_inverted_index.structures. | 131 |
| abstract_inverted_index.3D‐printed | 108 |
| abstract_inverted_index.advancements | 158 |
| abstract_inverted_index.demonstrated | 64 |
| abstract_inverted_index.hierarchical | 6, 151 |
| abstract_inverted_index.prototyping, | 113 |
| abstract_inverted_index.real‐world | 197 |
| abstract_inverted_index.reusability. | 98 |
| abstract_inverted_index.8.06–103.23 | 59 |
| abstract_inverted_index.affordability | 164 |
| abstract_inverted_index.applications, | 169 |
| abstract_inverted_index.contamination | 94 |
| abstract_inverted_index.requirements, | 104 |
| abstract_inverted_index.synthetically | 19 |
| abstract_inverted_index.manufacturable | 183 |
| abstract_inverted_index.microstructure | 43 |
| abstract_inverted_index.non‐adhesive | 51 |
| abstract_inverted_index.single‐level | 120 |
| abstract_inverted_index.high‐capacity | 193 |
| abstract_inverted_index.micro/nanoscale | 7 |
| abstract_inverted_index.microstructures | 121 |
| abstract_inverted_index.resin‐printed | 136 |
| abstract_inverted_index.gecko‐inspired | 32 |
| abstract_inverted_index.cost‐effective, | 28 |
| abstract_inverted_index.lithography‐free | 29 |
| abstract_inverted_index.diffraction‐grated | 39, 115 |
| abstract_inverted_index.wedge‐shaped/angled | 140 |
| abstract_inverted_index.state‐of‐the‐art | 155 |
| cited_by_percentile_year | |
| countries_distinct_count | 1 |
| institutions_distinct_count | 5 |
| citation_normalized_percentile.value | 0.53076725 |
| citation_normalized_percentile.is_in_top_1_percent | False |
| citation_normalized_percentile.is_in_top_10_percent | False |