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"biomimetics"
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Synthetic nacre by predesigned matrix-directed mineralization
Although biomimetic designs are expected to play a key role in exploring future structural materials, facile fabrication of bulk biomimetic materials under ambient conditions remains a major challenge. Here, we describe a mesoscale \"assembly-and-mineralization\" approach inspired by the natural process in mollusks to fabricate bulk synthetic nacre that highly resembles both the chemical composition and the hierarchical structure of natural nacre. The millimeter-thick synthetic nacre consists of alternating organic layers and aragonite platelet layers (91 weight percent) and exhibits good ultimate strength and fracture toughness. This predesigned matrix-directed mineralization method represents a rational strategy for the preparation of robust composite materials with hierarchically ordered structures, where various constituents are adaptable, including brittle and heat-labile materials.
Journal Article
Correction: Bions: A Family of Biomimetic Mineralo-Organic Complexes Derived from Biological Fluids
Bions sub-cultures were incubated in cell culture conditions for 2 weeks and the amount of bions was monitored by light absorbance. Bions were retrieved by centrifugation, followed by washing steps and preparation for EDX analysis.
Journal Article
Biomimicry for designers : applying nature's processes and materials in the real world
The importance of biomimetics - imitating life's natural processes - has been known for years and designers have often looked to nature for formal solutions. The natural world contains infinite examples of how to achieve complex behaviours and applications by using simple materials in a clever way, as all organisms make use of limited raw materials to survive. In the popular imagination, the best-known example is the microscopic 'hook' on burrs that led to the development of Velcro, but there are many more applications, from kingfisher beaks inspiring the shape of bullet trains to shark skin being used as a model for advanced swimsuits. This book presents many examples, showing each natural phenomenon alongside its application, with an accessible explanation of the biology and the story of the design. While most are concrete examples that have already been developed, others point the way to what might be possible for an enterprising designer, providing a starting point for creativity. This timely overview is the perfect introduction for designers of all disciplines, and a reminder that inspiration may be just down the garden path.
Book
Future tech : from personal robots to motorized monocycles
Explains and illustrates the most current research and technologies that promise to change our lives dramatically in the future, from machines with the ability of independent thought, to cars that drive themselves, to robots that borrow their nature from nature itself.
Book
Erythrocyte membrane-camouflaged polymeric nanoparticles as a biomimetic delivery platform
Efforts to extend nanoparticle residence time in vivo have inspired many strategies in particle surface modifications to bypass macrophage uptake and systemic clearance. Here we report a top-down biomimetic approach in particle functionalization by coating biodegradable polymeric nanoparticles with natural erythrocyte membranes, including both membrane lipids and associated membrane proteins for long-circulating cargo delivery. The structure, size and surface zeta potential, and protein contents of the erythrocyte membrane-coated nanoparticles were verified using transmission electron microscopy, dynamic light scattering, and gel electrophoresis, respectively. Mice injections with fluorophore-loaded nanoparticles revealed superior circulation half-life by the erythrocyte-mimicking nanoparticles as compared to control particles coated with the state-of-the-art synthetic stealth materials. Biodistribution study revealed significant particle retention in the blood 72 h following the particle injection. The translocation of natural cellular membranes, their associated proteins, and the corresponding functionalities to the surface of synthetic particles represents a unique approach in nanoparticle functionalization.
Journal Article
Living materials fabricated via gradient mineralization of light-inducible biofilms
Living organisms have evolved sophisticated cell-mediated biomineralization mechanisms to build structurally ordered, environmentally adaptive composite materials. Despite advances in biomimetic mineralization research, it remains difficult to produce mineralized composites that integrate the structural features and ‘living’ attributes of their natural counterparts. Here, inspired by natural graded materials, we developed living patterned and gradient composites by coupling light-inducible bacterial biofilm formation with biomimetic hydroxyapatite (HA) mineralization. We showed that both the location and the degree of mineralization could be regulated by tailoring functional biofilm growth with spatial and biomass density control. The cells in the composites remained viable and could sense and respond to environmental signals. Additionally, the composites exhibited a maximum 15-fold increase in Young’s modulus after mineralization and could be applied to repair damage in a spatially controlled manner. Beyond insights into the mechanism of formation of natural graded composites, our study provides a viable means of fabricating living composites with dynamic responsiveness and environmental adaptability.
Coupling light-inducible bacterial biofilm formation with hydroxyapatite mineralization enables the synthesis of living patterned and gradient composite biomaterials with control over the degree of mineralization and the ability to self-heal.
Journal Article