3D Tailored Crumpling of Block‐Copolymer Lithography on Chemically Modified Graphene

Kim, Ju Young; Lim, Joonwon; Jin, Hyeong Min; Kim, Bong Hoon; Jeong, Seong‐Jun; Choi, Daeseon; Li, Dong Jun; Kim, Sang Ouk

doi:10.1002/adma.201504590

Cited by 62 publications

(60 citation statements)

References 54 publications

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“…The idea of utilizing out‐of‐plane deformation can be further extended out to 3D designs. By taking inspirations from classical Japanese paper arts such as Origami and Kirigami, multifunctional systems with reconfigurable 3D configurations are applicable to biological systems, sensors/actuators, and wearable electronics . Kirigami inspired designs are of particular interest owing to the unique periodic cutting pattern that defines Kirigami.…”

Section: Introductionmentioning

confidence: 99%

Kirigami‐Inspired Textile Electronics: K.I.T.E.

Kim

Zhou

et al. 2019

Adv Materials Technologies

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Electronic textiles (e‐textiles) are in prime position to revolutionize the field of wearable electronics owing to their ubiquitous use and universal acceptance. However, mechanical incompatibility between the rigid conductive components on the soft textile platforms creates fragile e‐textile systems with poor electromechanical attributes. In this work, a novel design strategy to inkjet print reactive silver inks onto woven textiles with Kirigami‐inspired patterning to create e‐textiles with enhanced electromechanical features is introduced. By controlling the print processing and curing conditions, uniform conductive coatings with sheet resistances of 0.09 Ω sq−1 are achieved such that they do not interfere with the textiles innate flexibility, breathability, comfort, and fabric hand. The electromechanical coupling of the printed textiles shows a direct dependence on the anisotropic nature of the woven structures. Introducing Kirigami patterning creates robust devices that enhance and stabilize the electrical conductivity (ΔR/R0 < −20%) over large strain regimes (>150%). Furthermore, an electrocardiogram monitoring system fabricated from Kirigami e‐textiles exhibits stable signal acquisition under extreme deformations from arm joint flexion. The distinct properties of Kirigami patterning on e‐textiles enable unprecedented electromechanical performance in wearable textile electronics.

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Section: Introductionmentioning

confidence: 99%

Kirigami‐Inspired Textile Electronics: K.I.T.E.

Kim

Zhou

et al. 2019

Adv Materials Technologies

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“…Using active catalysts as electrode materials is one common strategy to promote oxygen reduction reaction (ORR), and for this specific purpose, many catalysts of high potential were synthesized, exhibiting highly comparable performance relative to precious Pt [3][4][5]. Despite the enormous reports on active ORR catalysts, few pay attention onto the packing models of catalytic materials for electrode, while the efficiency of mass transportation especially in ORR was reported to be another key aspect to achieve high performance [6][7][8]. Commonly, too dense packing or overlap might bury the active sites and lead to insufficient usage of active materials.…”

Section: Introductionmentioning

confidence: 99%

N-doped crumpled graphene: bottom-up synthesis and its superior oxygen reduction performance

Zhang

Jin

et al. 2016

Sci. China Mater.

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The crumpled graphene (CrG) was fabricated by applying defluorination of polyvinylidenefluoride (PVDF) on highly curved surface of CaC2 particle through bottom-up synthetic strategy. The limited reaction depth between PVDF and CaC2 leads to the formation of CrG with thin layer (3−6 layer graphene) and reasonable high specific surface area (~324.8 m 2 g −1 ). CrG with N incorporation (N-CrG) was applied as electrode material for reducing oxygen (i.e., oxygen reduction reaction, ORR) in alkaline, showing close onset potential to that of Pt/C and better mass-diffusion behavior. Surprisingly, with increased mass loading of catalysts, N-CrG exhibits steady current increase while Pt/C shows clear current plateau. Meanwhile, the N-CrG sample reveals high cycling stability and tolerance to contaminant, demonstrating its high potential for practical applications. Additionally, the bottom-up synthetic pathway to CrG via polymer dehalogenation on solid alkaline may find more applications which require controlled morphology and thickness of deposited thin graphitic carbon layers.

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“…b) Catalytic electrodes: HER of Pt nanocatalyst/crumpled chemical modified graphene (CMG) (squares), Pt nanocatalyst/flat graphene (circles), and Pt/C (triangles). The right inset images demonstrate the ease of H 2 release from crumpled Pt‐graphene electrode . Reproduced with permission .…”

Section: Wrinkling and Crumpling Of 2d Materials Films On Flat Substratesmentioning

confidence: 99%

From Flatland to Spaceland: Higher Dimensional Patterning with Two‐Dimensional Materials

et al. 2017

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The creation of three-dimensional (3D) structures from two-dimensional (2D) nanomaterial building blocks enables novel chemical, mechanical or physical functionalities that cannot be realized with planar thin films or in bulk materials. In this Progress Report, we review the use of emerging 2D materials to create complex out-of-plane surface topographies and 3D material architectures. We focus on recent approaches that yield periodic textures or patterns, and present four techniques as case studies: (i) wrinkling and crumpling of planar sheets, (ii) encapsulation by crumpled nanosheet shells, (iii) origami folding and kirigami cutting to create programmed curvature, and (iv) 3D printing of 2D material suspensions. Work to date in this field has primarily used graphene and graphene oxide as the 2D building blocks, and we consider how these unconventional approaches may be extended to alternative 2D materials and their heterostructures. Taken together, these emerging patterning and texturing techniques represent an intriguing alternative to conventional materials synthesis and processing methods, and are expected to contribute to the development of new composites, stretchable electronics, energy storage devices, chemical barriers, and biomaterials.

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3D Tailored Crumpling of Block‐Copolymer Lithography on Chemically Modified Graphene

Cited by 62 publications

References 54 publications

Kirigami‐Inspired Textile Electronics: K.I.T.E.

Kirigami‐Inspired Textile Electronics: K.I.T.E.

N-doped crumpled graphene: bottom-up synthesis and its superior oxygen reduction performance

From Flatland to Spaceland: Higher Dimensional Patterning with Two‐Dimensional Materials

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