Gyroid nanoporous scaffold for conductive polymers

Guo, Fengxiao; Schulte, Lars; Zhang, Weimin; Vigild, Martin Etchells; Ndoni, Sokol

doi:10.1039/c0py00322k

Cited by 4 publications

(5 citation statements)

References 9 publications

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“…The role of dimensionality and connectivity of nanostructures inspired from BCPs on charge transport had been investigated previously (see Figure ) . Experimental results showed that the ion conductivity was the highest for the 3D DG structure, while other structures, such as hexagonally arranged cylinders (1D) and lamellar structures (2D) with continuity only in one dimension performed poorly owing to the lack of structural integrity and smaller surface area.…”

Section: Matter Transportmentioning

confidence: 94%

Engineering Gyroid‐Structured Functional Materials via Templates Discovered in Nature and in the Lab

Zhang

2015

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In search of optimal structures for functional materials fabrication, the gyroid (G) structure has emerged as a promising subject of widespread research due to its distinct symmetry, 3D interconnected networks, and inherent chiral helices. In the past two decades, researchers have made great progress fabricating G-structured functional materials (GSFMs) based on G templates discovered both in nature and in the lab. The GSFMs demonstrate extraordinary resonance when interacting with light and matter. The superior properties of GSFMs can be divided into two categories based on the dominant structural properties, namely, dramatic optical performances dominated by short-range symmetry and well-defined texture, and effective matter transport due to long-range 3D interconnections and high integrity. In this review, G templates suitable for fabrication of GSFMs are summarized and classified. State-of-the-art optical applications of GSFMs, including photonic bandgap materials, chiral devices, plasmonic materials, and matamaterials, are systematically discussed. Applications of GSFMs involved in effective electron transport and mass transport, including electronic devices, ultrafiltration, and catalysis, are highlighted. Existing challenges that may hinder the final application of GSFMS together with possible solutions are also presented.

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Section: Matter Transportmentioning

confidence: 94%

Engineering Gyroid‐Structured Functional Materials via Templates Discovered in Nature and in the Lab

Zhang

2015

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“…Block copolymer self-assembly offers an ideal opportunity for designing ordered materials with three-dimensionally (3-D) continuous nanoscale domains. , Such nanoscale network morphologies are particularly useful in applications such as catalysis, solar cells, conducting membranes, and nanoporous templates due to their desirable size-scale and unique transport and mechanical properties. ,− In the recent triblock copolymer literature, numerous network morphologies have been reported at weak and intermediate segregation strengths, including the core–shell gyroid, alternating gyroid, and orthorhombic networks. ,− However, generating stable network structures at higher segregation strength remains a challenge in triblock copolymer systems due to kinetic and thermodynamic restrictions . To stabilize these morphologies in higher molecular weight and chemically incompatible polymer systems, here we detail a strategy to manipulate the interfaces between the copolymer blocks by synthesizing tapered triblock copolymers.…”

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confidence: 99%

Design and Synthesis of Network-Forming Triblock Copolymers Using Tapered Block Interfaces

et al. 2012

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We report a strategy for generating novel dual-tapered poly(isoprene-b-isoprene/styrene-b-styrene-b-styrene/methyl methacrylate-b-methyl methacrylate) [P(I-IS-S-SM-M)] triblock copolymers that combines anionic polymerization, atom transfer radical polymerization (ATRP), and Huisgen 1,3-dipolar cycloaddition click chemistry. The tapered interfaces between blocks were synthesized via a semi-batch feed using programmable syringe pumps. This strategy allows us to manipulate the transition region between copolymer blocks in triblock copolymers providing control over the interfacial interactions in our nanoscale phase-separated materials independent of molecular weight and block constituents. Additionally, we show the ability to retain a desirous and complex multiply-continuous network structure (alternating gyroid) in our dual-tapered triblock material.

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“…Nanostructuring can take the form of nanoporosity, nanowires or nanotubes (Liu et al, 2008 ; Ghasemi-Mobarakeh et al, 2009 ; Xie et al, 2009 ; Kang et al, 2011 ). Nanoporosity has been used to increase the surface area of electrodes as well as modulate the drug-release and biosensing properties of CP systems (Luo and Cui, 2009a , b ; Guo et al, 2011 ; Kang et al, 2011 ; Szultka-Mlynska et al, 2016 ). Nanoporosity is typically achieved by depositing around a template, such as polystyrene beads, which is removed after deposition.…”

Section: Strategies To Improve Bionic Visionmentioning

confidence: 99%

Visual Prosthesis: Interfacing Stimulating Electrodes with Retinal Neurons to Restore Vision

et al. 2017

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The bypassing of degenerated photoreceptors using retinal neurostimulators is helping the blind to recover functional vision. Researchers are investigating new ways to improve visual percepts elicited by these means as the vision produced by these early devices remain rudimentary. However, several factors are hampering the progression of bionic technologies: the charge injection limits of metallic electrodes, the mechanical mismatch between excitable tissue and the stimulating elements, neural and electric crosstalk, the physical size of the implanted devices, and the inability to selectively activate different types of retinal neurons. Electrochemical and mechanical limitations are being addressed by the application of electromaterials such as conducting polymers, carbon nanotubes and nanocrystalline diamonds, among other biomaterials, to electrical neuromodulation. In addition, the use of synthetic hydrogels and cell-laden biomaterials is promising better interfaces, as it opens a door to establishing synaptic connections between the electrode material and the excitable cells. Finally, new electrostimulation approaches relying on the use of high-frequency stimulation and field overlapping techniques are being developed to better replicate the neural code of the retina. All these elements combined will bring bionic vision beyond its present state and into the realm of a viable, mainstream therapy for vision loss.

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Gyroid nanoporous scaffold for conductive polymers

Cited by 4 publications

References 9 publications

Engineering Gyroid‐Structured Functional Materials via Templates Discovered in Nature and in the Lab

Engineering Gyroid‐Structured Functional Materials via Templates Discovered in Nature and in the Lab

Design and Synthesis of Network-Forming Triblock Copolymers Using Tapered Block Interfaces

Visual Prosthesis: Interfacing Stimulating Electrodes with Retinal Neurons to Restore Vision

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