Journal ArticleDOI
Stretchable nanoparticle conductors with self-organized conductive pathways
Yoonseob Kim,Jian Zhu,Bongiun Yeom,Matthew Di Prima,Xianli Su,Jin-Gyu Kim,Seung-Ho Jo Yoo,Ctirad Uher,Nicholas A. Kotov +8 more
Reads0
Chats0
TLDR
Stretchable conductors of polyurethane containing spherical nanoparticles deposited by either layer-by-layer assembly or vacuum-assisted flocculation are demonstrated, demonstrating the electronic tunability of mechanical properties, which arise from the dynamic self-organization of the nanoparticles under stress.Abstract:
Research in stretchable conductors is fuelled by diverse technological needs. Flexible electronics, neuroprosthetic and cardiostimulating implants, soft robotics and other curvilinear systems require materials with high conductivity over a tensile strain of 100 per cent (refs 1-3). Furthermore, implantable devices or stretchable displays need materials with conductivities a thousand times higher while retaining a strain of 100 per cent. However, the molecular mechanisms that operate during material deformation and stiffening make stretchability and conductivity fundamentally difficult properties to combine. The macroscale stretching of solids elongates chemical bonds, leading to the reduced overlap and delocalization of electronic orbitals. This conductivity-stretchability dilemma can be exemplified by liquid metals, in which conduction pathways are retained on large deformation but weak interatomic bonds lead to compromised strength. The best-known stretchable conductors use polymer matrices containing percolated networks of high-aspect-ratio nanometre-scale tubes or nanowires to address this dilemma to some extent. Further improvements have been achieved by using fillers (the conductive component) with increased aspect ratio, of all-metallic composition, or with specific alignment (the way the fillers are arranged in the matrix). However, the synthesis and separation of high-aspect-ratio fillers is challenging, stiffness increases with the volume content of metallic filler, and anisotropy increases with alignment. Pre-strained substrates, buckled microwires and three-dimensional microfluidic polymer networks have also been explored. Here we demonstrate stretchable conductors of polyurethane containing spherical nanoparticles deposited by either layer-by-layer assembly or vacuum-assisted flocculation. High conductivity and stretchability were observed in both composites despite the minimal aspect ratio of the nanoparticles. These materials also demonstrate the electronic tunability of mechanical properties, which arise from the dynamic self-organization of the nanoparticles under stress. A modified percolation theory incorporating the self-assembly behaviour of nanoparticles gave an excellent match with the experimental data.read more
Citations
More filters
Journal ArticleDOI
Room-Temperature Metallic Fusion-Induced Layer-by-Layer Assembly for Highly Flexible Electrode Applications
Yongkwon Song,Donghee Kim,Sungkun Kang,Younji Ko,Jongkuk Ko,June Huh,Yongmin Ko,Yongmin Ko,Seung Woo Lee,Jinhan Cho +9 more
Journal ArticleDOI
Stretching Silver: Printed Metallic Nano Inks in Stretchable Conductor Applications
Jiseok Kim,Woo Soo Kim +1 more
TL;DR: In this article, the authors highlighted the biomimicry of humans' skin while maintaining full functionality and the stretchability of electronic devices overcomes restrictions on applications for flexible electronics and provides even more options for applications since stretchability ensures that electronic devices are conformable to any curved surface and can even be wrapped around irregularly shaped objects and attached onto surfaces, stretching out and restoring back regularly or irregularly.
Journal ArticleDOI
2D Percolation Design with Conductive Microparticles for Low‐Strain Detection in a Stretchable Sensor
Journal ArticleDOI
Elastomeric Conducting Polyaniline Formed Through Topological Control of Molecular Templates
Hangjun Ding,Mingjiang Zhong,Haosheng Wu,Sangwoo Park,Jacob Mohin,Luke Klosterman,Zhou Yang,Huai Yang,Krzysztof Matyjaszewski,Christopher J. Bettinger +9 more
TL;DR: A strategy for creating elastomeric conducting polyaniline networks through molecular templating of conjugated polymer networks that have prospective applications in devices for energy storage and conversion, consumer electronics, and bioelectronics.
Journal ArticleDOI
Shape memory-based tunable resistivity of polymer composites
Hongsheng Luo,Zhou Xingdong,Yuanyuan Ma,Guobin Yi,Xiaoling Cheng,Yong Zhu,Xihong Zu,Nanjun Zhang,Binghao Huang,Lifang Yu +9 more
TL;DR: In this paper, a conductive composite in bi-layer structure was fabricated by embedding hybrid nanofillers, namely carbon nanotubes (CNTs) and silver nanoparticles (AgNPs), into a shape memory polyurethane (SMPU).
References
More filters
Journal ArticleDOI
Carbon Nanotubes--the Route Toward Applications
TL;DR: Many potential applications have been proposed for carbon nanotubes, including conductive and high-strength composites; energy storage and energy conversion devices; sensors; field emission displays and radiation sources; hydrogen storage media; and nanometer-sized semiconductor devices, probes, and interconnects.
Journal ArticleDOI
Fuzzy Nanoassemblies: Toward Layered Polymeric Multicomposites
TL;DR: In this article, a general approach for multilayers by consecutive adsorption of polyanions and polycations has been proposed and has been extended to other materials such as proteins or colloids.
Journal ArticleDOI
Materials and mechanics for stretchable electronics
TL;DR: Inorganic and organic electronic materials in microstructured and nanostructured forms, intimately integrated with elastomeric substrates, offer particularly attractive characteristics, with realistic pathways to sophisticated embodiments, and applications in systems ranging from electronic eyeball cameras to deformable light-emitting displays are described.
Journal ArticleDOI
Skin-like pressure and strain sensors based on transparent elastic films of carbon nanotubes
Darren J. Lipomi,Michael Vosgueritchian,Benjamin C. K. Tee,Sondra L. Hellstrom,Jennifer A. Lee,Courtney H. Fox,Zhenan Bao +6 more
TL;DR: Transparent, conducting spray-deposited films of single-walled carbon nanotubes are reported that can be rendered stretchable by applying strain along each axis, and then releasing this strain.
Journal ArticleDOI
Stretchable active-matrix organic light-emitting diode display using printable elastic conductors
Tsuyoshi Sekitani,Hiroyoshi Nakajima,Hiroki Maeda,Takanori Fukushima,Takuzo Aida,Kenji Hata,Takao Someya +6 more
TL;DR: The manufacture of printable elastic conductors comprising single-walled carbon nanotubes (SWNTs) uniformly dispersed in a fluorinated rubber is described, which is constructed a rubber-like stretchable active-matrix display comprising integrated printed elastic conductor, organic transistors and organic light-emitting diodes.