Highly Stretchable Patterned Gold Electrodes Made of Au Nanosheets

Moon, Geon Dae; Lim, Guh‐Hwan; Song, Jun Hyuk; Shin, Minkwan; Yu, Taekyung; Lim, Byungkwon; Jeong, Unyong

doi:10.1002/adma.201300794

Cited by 167 publications

(168 citation statements)

References 32 publications

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“…The resistivity of the Au membrane has been calculated to be 4.0 Â 10 À 8 Om. This value is comparable to the corresponding Au value (r bulk ¼ 2.2 Â 10 À 8 Om) and epitaxial Au films 31 and is 1-2 orders of magnitude lower than the thermally evaporated Au film 32 . It indicates that our ultrathin Au membrane possess good conductivity.…”

Section: Discussionsupporting

confidence: 60%

Novel polymer-free iridescent lamellar hydrogel for two-dimensional confined growth of ultrathin gold membranes

et al. 2014

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Hydrogels are generally thought to be formed by nano-to micrometre-scale fibres or polymer chains, either physically branched or entangled with each other to trap water. Although there are also anisotropic hydrogels with apparently ordered structures, they are essentially polymer fibre/discrete polymer chains-based network without exception. Here we present a type of polymer-free anisotropic lamellar hydrogels composed of 100-nm-thick water layers sandwiched by two bilayer membranes of a self-assembled nonionic surfactant, hexadecylglyceryl maleate. The hydrogels appear iridescent as a result of Bragg's reflection of visible light from the periodic lamellar plane. The particular lamellar hydrogel with extremely wide water spacing was used as a soft two-dimensional template to synthesize singlecrystalline nanosheets in the confined two-dimensional space. As a consequence, flexible, ultrathin and large area single-crystalline gold membranes with atomically flat surface were produced in the hydrogel. The optical and electrical properties were detected on a single gold membrane.

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Section: Discussionsupporting

confidence: 60%

Novel polymer-free iridescent lamellar hydrogel for two-dimensional confined growth of ultrathin gold membranes

et al. 2014

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“…However, the application of these materials in large-area, integrated devices may be restricted by their relatively poor electrical properties and their high cost. The second strategy is to use highly conductive metallic nanostructures, such as rectangular-patterned gold nanosheets 14 (strain (ε) = 100% on Ecoflex substrate) or silver nanoparticles embedded in composite materials 15 (ε = 140% on elastomeric rubber fiber).…”

Section: Introductionmentioning

confidence: 99%

A highly stretchable, helical copper nanowire conductor exhibiting a stretchability of 700%

et al. 2014

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Recent advances in unconventional foldable and stretchable electronics have forged a new field in electronics. However, traditional conducting metal oxides and metal thin films are inappropriate as electrodes for stretchable devices because they are vulnerable to tensile strain as well as bending strain. In this study, we describe the fabrication of annealing-free, copper nanowire (CuNW)-based stretchable electrodes using an inexpensive metal source through a simple and scalable process at low temperature without a vacuum. We also introduce a reversible and extremely stretchable (up to 700% of strain) helical, CuNW-based conducting spring, which has not been previously used for stretchable electrodes. NPG Asia Materials (2014) 6, e132; doi:10.1038/am.2014.88; published online 26 September 2014 INTRODUCTION Recent advances in unconventional foldable and stretchable electronics show great potential for future wearable applications, including smart skins, electronic eye-type imagers, skin-like pressure sensors, electronic textiles and muscle-like soft actuators. 1-5 Most of these applications require sufficient elasticity for bending, stretching, twisting and deformation into complex, non-planar shapes while maintaining good electrical properties and reliability. Stretchability is the most crucial property for the development of next-generation wearable devices. To date, two primary strategies have been suggested for the fabrication of stretchable electronic parts apart from complex lithography-based approaches that can shape inorganic conductive materials or metals into buckled geometries, including island-bridge systems. [6][7][8][9] The first strategy is the inclusion of micro-or nano-scale conductive carbon materials into elastic polymer matrices. 1,10-13 For example, carbon-based materials, such as carbon nanotubes and graphene, have been extensively researched for stretchable/foldable conductors. Ma et al. 13 fabricated helical ribbon-structured composites composed of carbon nanotubes and Ag flakes using a shape-memory polymer, demonstrating stable resistivity up to a strain of 600%. However, the application of these materials in large-area, integrated devices may be restricted by their relatively poor electrical properties and their high cost. The second strategy is to use highly conductive metallic nanostructures, such as rectangular-patterned gold nanosheets 14 (strain (ε) = 100% on Ecoflex substrate) or silver nanoparticles embedded in composite materials 15 (ε = 140% on elastomeric rubber fiber).Recently, networks of one-dimensional metal nanowires, accompanied by a simple, scalable process (for example, solution-phase

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“…A number of studies have explored the development of wearable strain sensors to detect human motion in medical, sports, and entertainment applications. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] In general, typical human joint movements generate strains of 50%, [14] so a highly stretchable strain sensor capable of measuring strains larger than 50% is necessary for wearable motion-detection applications. Although conventional strain sensors have a well-established technology www.advancedsciencenews.com www.mme-journal.de sensor is very simple compared with traditional strain sensors, which require complex nanomaterial formations or complicated lithography processes.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of a Highly Sensitive Stretchable Strain Sensor Utilizing a Microfibrous Membrane and a Cracking Structure on Conducting Polymer

Jeon

Hong

Cho

et al. 2017

Macro Materials & Eng

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Recently, the detection of human motion has attracted considerable attention for the development of smart healthcare systems. Flexible or stretchable strain sensors are required to measure deformations on arbitrarily shaped human skin areas caused by human motion, and numerous studies have explored the development of such sensors. Here, a highly sensitive stretchable strain sensor is introduced, which consists of elastic fibrous membrane coated with conducting polymer. The membrane can be utilized to detect applied strain by measuring the conductance change caused by the change in the nanocracking structure on the coated conducting polymer layer. Furthermore, by collecting aligned microfibers as the fibrous membrane during electrospinning process, the sensor exhibits higher sensitivity (more than 40‐fold higher than the nonaligned version). Although limitations still remain in the repeatability and the applicability of the sensor, the developed sensor will demonstrate great potential for measuring applied strain and stress over a wide sensing range with high sensitivity is expected.

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Highly Stretchable Patterned Gold Electrodes Made of Au Nanosheets

Abstract: Multilayered Au nanosheets are suggested as a novel class of material for fabricating stretchable electrodes suitable for organic-based electronic devices. The electrodes show no difference in resistivity during repeated stretching cycles of up to ϵ = 40%.

Cited by 167 publications

References 32 publications

Novel polymer-free iridescent lamellar hydrogel for two-dimensional confined growth of ultrathin gold membranes

Novel polymer-free iridescent lamellar hydrogel for two-dimensional confined growth of ultrathin gold membranes

A highly stretchable, helical copper nanowire conductor exhibiting a stretchability of 700%

Fabrication of a Highly Sensitive Stretchable Strain Sensor Utilizing a Microfibrous Membrane and a Cracking Structure on Conducting Polymer

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