Journal
LANGMUIR
Volume 28, Issue 4, Pages 2206-2210Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la203275x
Keywords
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Funding
- National Science Foundation
- Austen Bioinnovation Institute in Akron (ABIA)
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1047655] Funding Source: National Science Foundation
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We employ the adhesive web building strategy used by modern orb-weaving spiders to produce functional microthreads that are similar in structure (beads-on-a-string (BOAS) morphology) and adhesive properties to the capture-silk threads of the spider web. The diameter and spacing of droplets (beads) are controlled by varying the viscosity, velocity, and surface tension of the coating fluid. Using these functional threads, we also describe the behavior of the BOAS morphology during contact (mimicking the collision of an insect with the web) and during separation (mimicking insect rescue from the web). Our results show that the BOAS structure performs better than a cylindrical structure for adhesion, which may explain why this morphology is so prevalent in spider webs despite the cost of increasing the visibility of the web.
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