Nanoarchitectonics Revolution and Evolution: From Small Science to Big Technology

Ariga, Katsuhiko

doi:10.1002/smsc.202000032

Cited by 64 publications

(29 citation statements)

References 293 publications

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“…[ 8 ] The predominant biomechanical properties (i.e., isotropic strength and fatigue resistance) are attributed to spatially layered structures, and sophisticated hierarchical architectures ranging from nano/micro‐ to macroscopic levels, despite their limited constituents (collagen and elastin, Figure a). [ 7,8,21 ] Herein, inspired by such distinct structure–mechanics relationship, we report a kind of hydrogel featuring 2D isotropic fatigue‐resistance. The fabrication involves the formation of preferentially aligned lamellar micro/nanostructures within a hydrogel material through a bidirectional freeze‐casting process, [ 1,22–25 ] followed by further compression annealing (Figure 1b).…”

Section: Introductionmentioning

confidence: 99%

Bioinspired 2D Isotropically Fatigue‐Resistant Hydrogels

et al. 2022

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Engineering conventional hydrogels with muscle‐like anisotropic structures can efficiently increase the fatigue threshold over 1000 J m−2 along the alignment direction; however, the fatigue threshold perpendicular to the alignment is still as low as ≈100–300 J m−2, making them nonsuitable for those scenarios where isotropic properties are desired. Here, inspired by the distinct structure–properties relationship of heart valves, a simple yet general strategy to engineer conventional hydrogels with unprecedented yet isotropic fatigue resistance, with a record‐high fatigue threshold over 1,500 J m−2 along two arbitrary in‐plane directions is reported. The two‐step process involves the formation of preferentially aligned lamellar micro/nanostructures through a bidirectional freeze‐casting process, followed by compression annealing, synergistically contributing to extraordinary resistance to fatigue crack propagation. The study provides a viable means of fabricating soft materials with isotropically extreme properties, thereby unlocking paths to apply these advanced soft materials toward applications including soft robotics, flexible electronics, e‐skins, and tissue patches.

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Section: Introductionmentioning

confidence: 99%

Bioinspired 2D Isotropically Fatigue‐Resistant Hydrogels

et al. 2022

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“…The synthesis of advanced functional materials deserves special attention because their use is critical in revolutionary technologies. [ 1 ] The performance of these materials depends on their synthesis recipes, especially fine structure regulations. [ 2 ] Large quantities of organic solvents and reagents are usually required in the fabrication of these materials.…”

Section: Introductionmentioning

confidence: 99%

Molecular Imprinting: Green Perspectives and Strategies

et al. 2021

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Large quantities of organic solvents and reagents are usually required in the fabrication of these materials. Moreover, the use of excess reagents in solvent extraction, purification, filtration/ centrifugation, and cleaning processes is essential for adequate product purity. Because of the numerous practical applications of advanced materials, some are synthesized on a large scale and commercialized. [3] The excessive consumption of nonrenewable, hazardous chemicals is an unsustainable practice and a prominent criticism of these materials. Nonetheless, the use of advanced materials in sensing applications, medicine, electronics, and catalysis is inevitable. [4] During various research activities, such as fabricating advanced materials, as well as in the subsequent stage, i.e., industrial operations, new challenges have arisen that impact not only almost every aspect of human life but also other living creatures and ecosystems. It is estimated that the impact of these practices will endure into the next century. [5] Since the advancement of science, industry, and technology is inevitable, scientists have been persuaded to search for methods to counteract or minimize the negative impacts of human activities. [6] Thus, green chemistry has advanced and green principles have been defined for most sciences, including synthesis, [7] analytical chemistry, [8] engineering, [9] and pharmaceutical science. [10] Fortunately, contemporary society has great awareness of deleterious environmental side effects, resulting in a sense Advances in revolutionary technologies pose new challenges for human life; in response to them, global responsibility is pushing modern technologies toward greener pathways. Molecular imprinting technology (MIT) is a multidisciplinary mimic technology simulating the specific binding principle of enzymes to substrates or antigens to antibodies; along with its rapid progress and wide applications, MIT faces the challenge of complying with green sustainable development requirements. With the identification of environmental risks associated with unsustainable MIT, a new aspect of MIT, termed green MIT, has emerged and developed. However, so far, no clear definition has been provided to appraise green MIT. Herein, the implementation process of green chemistry in MIT is demonstrated and a mnemonic device in the form of an acronym, GREENIFICATION, is proposed to present the green MIT principles. The entire greenificated imprinting process is surveyed, including element choice, polymerization implementation, energy input, imprinting strategies, waste treatment, and recovery, as well as the impacts of these processes on operator health and the environment. Moreover, assistance of upgraded instrumentation in deploying greener goals is considered. Finally, future perspectives are presented to provide a more complete picture of the greenificated MIT road map and to pave the way for further development.

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“…Nanoarchitectonics is a conceptual methodology to combine nanotechnology with other research fields such as organic chemistry, supramolecular chemistry, materials chemistry, microfabrication technology, and bio-related science [ 91 , 92 ]. Functional material systems are prepared from nanoscale units such as atoms, molecules, and nanomaterials through combinations and selections of building units and processes including atom/molecular manipulation, chemical transformation, self-assembly/self-organization, field-controlled organization, material processing, and bio-related treatments [ 93 ].…”

Section: Introductionmentioning

confidence: 99%

Nanoarchitectonics for Hierarchical Fullerene Nanomaterials

2021

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Nanoarchitectonics is a universal concept to fabricate functional materials from nanoscale building units. Based on this concept, fabrications of functional materials with hierarchical structural motifs from simple nano units of fullerenes (C60 and C70 molecules) are described in this review article. Because fullerenes can be regarded as simple and fundamental building blocks with mono-elemental and zero-dimensional natures, these demonstrations for hierarchical functional structures impress the high capability of the nanoarchitectonics approaches. In fact, various hierarchical structures such as cubes with nanorods, hole-in-cube assemblies, face-selectively etched assemblies, and microstructures with mesoporous frameworks are fabricated by easy fabrication protocols. The fabricated fullerene assemblies have been used for various applications including volatile organic compound sensing, microparticle catching, supercapacitors, and photoluminescence systems.

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Nanoarchitectonics Revolution and Evolution: From Small Science to Big Technology

Cited by 64 publications

References 293 publications

Bioinspired 2D Isotropically Fatigue‐Resistant Hydrogels

Bioinspired 2D Isotropically Fatigue‐Resistant Hydrogels

Molecular Imprinting: Green Perspectives and Strategies

Nanoarchitectonics for Hierarchical Fullerene Nanomaterials

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