Biotemplating synthesis of organized structures inspired by biological processes

Liu, Yin; Zhu, Chenglong; Wan, Fuqiang; Fang, Weijian; Xue, Bingyu; Zheng, Zhuozhi; Ping, Hang; Xie, Hao; Wang, Hao; Wang, Weimin; Fu, Zhengyi

doi:10.1016/j.giant.2022.100108

Cited by 8 publications

(2 citation statements)

References 188 publications

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“…Therefore, using bacteria as templates has the advantages of wide access and potential gene regulation functions, and has a good application prospect. 72 Additionally, bacteria have a high swimming speed and efficiency in the low Reynolds (Re) number flow regime, can sense and respond to external environmental signals, and can be externally detected via fluorescence or ultrasound imaging techniques. 25,73 In particular, bacteria offer several advantages as controllable microactuators: they draw chemical energy directly from their environment, they can be genetically engineered and employed as sensing elements and they are scalable and configurable in that the bacteria can be selectively patterned.…”

Section: Bacterial Template-based Micro/nanorobotsmentioning

confidence: 99%

Intelligent micro/nanorobots based on biotemplates

Chen,

Cai,

Ren

et al. 2024

Mater. Horiz.

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Section: Bacterial Template-based Micro/nanorobotsmentioning

confidence: 99%

Intelligent micro/nanorobots based on biotemplates

Chen,

Cai,

Ren

et al. 2024

Mater. Horiz.

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“…Biotemplating provides a synthesis approach that incorporates inorganic materials into biological structures, leveraging biotemplate geometry, to produce hierarchical composite materials such as aerogels [21]. Biotemplating offers shape-controlled templates, abundant source material, chemical functionalization, and the ability to form three-dimensional porous systems via hydrogels [22][23][24][25][26]. Common biopolymers used in biotemplating include cellulose nanofibers (CNF), alginate, gelatin, silk fibroin, M13 bacteriophage, and bacterial cellulose [25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Cellulose Nanofiber–Alginate Biotemplated Cobalt Composite Multifunctional Aerogels for Energy Storage Electrodes

Zhang,

Trackey,

Verma

et al. 2023

Gels

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Tunable porous composite materials to control metal and metal oxide functionalization, conductivity, pore structure, electrolyte mass transport, mechanical strength, specific surface area, and magneto-responsiveness are critical for a broad range of energy storage, catalysis, and sensing applications. Biotemplated transition metal composite aerogels present a materials approach to address this need. To demonstrate a solution-based synthesis method to develop cobalt and cobalt oxide aerogels for high surface area multifunctional energy storage electrodes, carboxymethyl cellulose nanofibers (CNF) and alginate biopolymers were mixed to form hydrogels to serve as biotemplates for cobalt nanoparticle formation via the chemical reduction of cobalt salt solutions. The CNF–alginate mixture forms a physically entangled, interpenetrating hydrogel, combining the properties of both biopolymers for monolith shape and pore size control and abundant carboxyl groups that bind metal ions to facilitate biotemplating. The CNF–alginate hydrogels were equilibrated in CaCl2 and CoCl2 salt solutions for hydrogel ionic crosslinking and the prepositioning of transition metal ions, respectively. The salt equilibrated hydrogels were chemically reduced with NaBH4, rinsed, solvent exchanged in ethanol, and supercritically dried with CO2 to form aerogels with a specific surface area of 228 m2/g. The resulting aerogels were pyrolyzed in N2 gas and thermally annealed in air to form Co and Co3O4 porous composite electrodes, respectively. The multifunctional composite aerogel’s mechanical, magnetic, and electrochemical functionality was characterized. The coercivity and specific magnetic saturation of the pyrolyzed aerogels were 312 Oe and 114 emu/gCo, respectively. The elastic moduli of the supercritically dried, pyrolyzed, and thermally oxidized aerogels were 0.58, 1.1, and 14.3 MPa, respectively. The electrochemical testing of the pyrolyzed and thermally oxidized aerogels in 1 M KOH resulted in specific capacitances of 650 F/g and 349 F/g, respectively. The rapidly synthesized, low-cost, hydrogel-based synthesis for tunable transition metal multifunctional composite aerogels is envisioned for a wide range of porous metal electrodes to address energy storage, catalysis, and sensing applications.

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Diatom Cribellum‐Inspired Hierarchical Metamaterials: Unifying Perfect Absorption Toward Subwavelength Color Printing

Xie,

Huang,

Yang

et al. 2024

Advanced Materials

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Diatom exoskeletons, known as frustules, exhibit a unique multilayer structure that has attracted considerable attention across interdisciplinary research fields as a source of biomorphic inspiration. These frustules possess a hierarchical porous structure, ranging from millimeter‐scale foramen pores to nanometer‐scale cribellum pores. In this study, this natural template for nanopattern design is leveraged to showcase metamaterials that integrates perfect absorption and subwavelength color printing. The cribellum‐inspired hierarchical nanopatterns, organized in a hexagonal unit cell with a periodicity of 300 nm, are realized through a single‐step electron beam lithography process. By employing numerical models, it is uncovered that an additional induced collective dipole mode is the key mechanism responsible for achieving outstanding performance in absorption, reaching up to 99%. Analysis of the hierarchical organization reveals that variations in nanoparticle diameter and inter‐unit‐cell distance lead to shifts and broadening of the resonance peaks. It is also demonstrated that the hierarchical nanopatterns are capable of color reproduction with high uniformity and fidelity, serving as hexagonal pixels for high‐resolution color printing. These cribellum‐inspired metamaterials offer a novel approach to multifunctional metamaterial design, presenting aesthetic potential applications in the development of robotics and wearable electronic devices, such as smart skin or surface coatings integrated with energy harvesting functionalities.

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Biotemplating synthesis of organized structures inspired by biological processes

Cited by 8 publications

References 188 publications

Intelligent micro/nanorobots based on biotemplates

Intelligent micro/nanorobots based on biotemplates

Cellulose Nanofiber–Alginate Biotemplated Cobalt Composite Multifunctional Aerogels for Energy Storage Electrodes

Diatom Cribellum‐Inspired Hierarchical Metamaterials: Unifying Perfect Absorption Toward Subwavelength Color Printing

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