Journal ArticleDOI
Mechanical Buckling: Mechanics, Metrology, and Stretchable Electronics
TLDR
In this article, the buckling model of single-walled carbon nanotube arrays and cross-linked carbon-based monolayers is used to check the mechanical buckling phenomenon down to the nano-molecular scale, and the results provide useful information for the realization of flexible and/or stretchable organic electronics.Abstract:
Mechanical buckling usually means catastrophic failure in structural mechanics systems. However, controlled buckling of thin films on compliant substrates has been used to advantage in diverse fields such as micro-/nanofabrication, optics, bioengineering, and metrology as well as fundamental mechanics studies. In this Feature Article, a mechanical buckling model is presented, which sprang, in part, from the buckling study of high-quality, single-crystalline nanomaterials. To check the mechanical-buckling phenomenon down to the nano-/molecular scale, well-aligned single-walled carbon nanotube arrays and cross linked carbon-based monolayers are transferred from growth substrate onto elastomeric substrate and then they are buckled into well-defined shapes that are amenable to quantitative analysis. From this nano- or molecular-scale buckling, it is shown that the mechanical moduli of nanoscale materials can easily be determined, even using a model based on continuum mechanics. In addition, buckling phenomena can be utilized for the determination of mechanical moduli of organic functional materials such as poly(3-hexylthiophene) (P3HT) and P3HT/6,6-phenyl-C61-butyric acid methyl ester (PCBM) composite, which are widely used for organic transistors and organic photovoltaics. The results provide useful information for the realization of flexible and/or stretchable organic electronics. Finally, the fabrication and applications of “wavy, stretchable” single-crystal Si electronics on elastomeric substrates are demonstrated.read more
Citations
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Journal ArticleDOI
Fiber‐Based Wearable Electronics: A Review of Materials, Fabrication, Devices, and Applications
TL;DR: This article attempts to critically review the current state-of-arts with respect to materials, fabrication techniques, and structural design of devices as well as applications of the fiber-based wearable electronic products.
Journal ArticleDOI
Highly Stretchable Resistive Pressure Sensors Using a Conductive Elastomeric Composite on a Micropyramid Array
Chwee-Lin Choong,Mun-Bo Shim,Byoung-Sun Lee,Sanghun Jeon,Sanghun Jeon,Dong-Su Ko,Tae-Hyung Kang,Jihyun Bae,Lee Sung-Hoon,Kyung-Eun Byun,Jungkyun Im,Yong Jin Jeong,Chan Eon Park,Jong-Jin Park,U-In Chung +14 more
TL;DR: A stretchable resistive pressure sensor is achieved by coating a compressible substrate with a highly stretchable electrode that contains an array of microscale pyramidal features and the electrode comprises a polymer composite.
Journal Article
Soft matter with hard skin : From skin wrinkles to templating and material characterization
Jan Genzer,Jan Groenewold +1 more
TL;DR: This paper discusses how and why wrinkles/buckles form in various materials, and describes several examples from everyday life that demonstrate that wrinkling or buckling is indeed a commonplace phenomenon that spans a multitude of length scales.
Journal ArticleDOI
Super-elastic graphene ripples for flexible strain sensors.
TL;DR: This simple and controllable process of buckled graphene provides a feasible fabrication for graphene flexible electronic devices and strain sensors due to its novel mechanical and electrical properties.
Journal ArticleDOI
Stretchable and self-healing polymers and devices for electronic skin
TL;DR: In this paper, a review of the most recent advances in stretchable and self-healing polymers and devices for Electronic Skin (E-skin) applications is presented. But, the majority of organic materials can generally be rendered flexible, such materials are not stretchable, which is a key mechanical property necessary to realize applications of E-skin for prosthetics, artificial intelligence, systems for robotics, personal health monitoring, biocompatibility, and communication devices.
References
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Journal ArticleDOI
Spontaneous formation of ordered structures in thin films of metals supported on an elastomeric polymer
TL;DR: In this paper, the authors describe the appearance of complex, ordered structures induced by the buckling of thin metal films owing to thermal contraction of an underlying substrate, and account qualitatively for the size and form of the patterned features in terms of the nonuniform stresses developed in the film near steps on the polymer substrate.
PatentDOI
Stretchable form of single crystal silicon for high performance electronics on rubber substrates
TL;DR: In this article, the authors present stretchable and printable semiconductors and electronic circuits capable of providing good performance when stretched, compressed, flexed, or otherwise deformed.
Journal ArticleDOI
Stretchable and foldable silicon integrated circuits.
Dae-Hyeong Kim,Jong Hyun Ahn,Won Mook Choi,Hoon-Sik Kim,Tae-Ho Kim,Jizhou Song,Yonggang Huang,Zhuangjian Liu,Chun Lu,John A. Rogers +9 more
TL;DR: A simple approach to high-performance, stretchable, and foldable integrated circuits that integrate inorganic electronic materials, including aligned arrays of nanoribbons of single crystalline silicon, with ultrathin plastic and elastomeric substrates.
Journal ArticleDOI
Morphology evolution via self-organization and lateral and vertical diffusion in polymer:fullerene solar cell blends.
Mariano Campoy-Quiles,Toby A. M. Ferenczi,Tiziano Agostinelli,Pablo G. Etchegoin,Youngkyoo Kim,Youngkyoo Kim,Thomas D. Anthopoulos,Paul N. Stavrinou,Donal D. C. Bradley,Jenny Nelson +9 more
TL;DR: This paper proposes a morphology evolution that consists of an initial crystallization of P3HT chains, followed by diffusion of PCBM molecules to nucleation sites, at which aggregates ofPCBM then grow.