Isotropically stretchable gold conductors on elastomeric substrates

Görrn, Patrick; Cao, Wenzhe; Wagner, S.

doi:10.1039/c1sm05705g

Cited by 46 publications

(37 citation statements)

References 26 publications

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“…Our highly stretchable nanobelts (12 belts together) could be stretched to over 130% without a notable increase in resistance (Figure 3 e). There are reports on stretchable conductors prepared by fabricating out-of-plane wavy or in-plane S-shape metal belts structures on elastomer substrates, [ 56,57,68,69 ] but none of them have reached the level of stretchability and the small change of resistance during deformation as reported here. The maximum stress appears not to be limited by the failure of the gold nanobelts, but rather to the failure of the maximum prestrain length of the substrate material.…”

Section: Communicationmentioning

confidence: 71%

Highly Stretchable Gold Nanobelts with Sinusoidal Structures for Recording Electrocorticograms

et al. 2015

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Section: Communicationmentioning

confidence: 71%

Highly Stretchable Gold Nanobelts with Sinusoidal Structures for Recording Electrocorticograms

et al. 2015

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“…14 Other researchers reported 10% change in resistance over 20% strain which is the equivalent of a 0.5 gauge factor. 21 However, the gauge factor of our wrinkled thin film wires increased sharply after 100% strain. This increase can be explained by the nucleation and elongation of fractures in the metal thin film, as expected of any thin film under high tensile strain.…”

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confidence: 79%

Highly stretchable wrinkled gold thin film wires

Kim¹,

Park²,

Nguyen³

et al. 2016

Applied Physics Letters

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With the growing prominence of wearable electronic technology, there is a need to improve the mechanical reliability of electronics for more demanding applications. Conductive wires represent a vital component present in all electronics. Unlike traditional planar and rigid electronics, these new wearable electrical components must conform to curvilinear surfaces, stretch with the body, and remain unobtrusive and low profile. In this paper, the piezoresistive response of shrink induced wrinkled gold thin films under strain demonstrates robust conductive performance in excess of 200% strain. Importantly, the wrinkled metallic thin films displayed negligible change in resistance of up to 100% strain. The wrinkled metallic wires exhibited consistent performance after repetitive strain. Importantly, these wrinkled thin films are inexpensive to fabricate and are compatible with roll to roll manufacturing processes. We propose that these wrinkled metal thin film wires are an attractive alternative to conventional wires for wearable applications. Rapid growth in the fields of flexible electronics and wearable technology has created a surge of research into new materials and component designs in an effort to create electronics better suited for the human body.1-6 Therefore, there is a critical need to develop wires that can withstand repeated large strains and can be manufactured into discreet, low cost, and dense arrays. Unlike traditional electronics which are planar and rigid, these new electrical components must conform to curvilinear surfaces and stretch with the body. These components, especially for body-worn consumer and medical applications, must also endure frequent exposure to moisture as well as large strains while maintaining favorable electronic properties. Conductive wires that exhibit constant conductivity under high dynamic strains are of great interest.5 Such a stretchable wire would find application in many wearable systems because they would be used to electronically interface multiple components. Additionally, stretchable conductive wires can provide mechanical isolation for rigid components worn on the body where there is not yet a stretchable substitute. Active areas of research for creating these wires can be categorized into developing new composite materials, liquid metals, and mechanical design optimization of metal thin films.In developing stretchable wires, one of the active areas of research has been in developing new electronic materials that are able to withstand strains greater than that of metal thin films, which are known to have fracture limits of around 1% strain.7 For example, Chun et al. have shown that by mixing a silver nanoparticle and multi-walled carbon nanotube composite (Ag-MWNT) with polyvinylidenefluoride (PVDF), they were able to develop an elastic conductor with conductivities of up to 5710 S cm À1 at 0% strain and 20 S cm À1 at 140% strain. 8 Lee et al. have developed a highly transparent graphene and silver nanowire hybrid structure with a sheet resistance of 33 X/sq th...

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“…Thin fi lm gold ( ∼ 70 GPa) exhibits limited ductility and can withstand small bending strains without cracking during mechanical stress. [ 8 ] Any material chosen as source/drain (S/D) contacts must possess the correct work function, such that low ohmic contact is made with the semiconductor, indicated by a reduction in contact resistance of the device: this holds true for the Au/pentacene interface. [ 9 ] The gate dielectric is Parylene-C, chosen due to its biocompatibility, compatibility with chemical vapor deposition processing and hydrophobicity.…”

Section: Doi: 101002/adma201203976mentioning

confidence: 99%

Mechanical Cycling Stability of Organic Thin Film Transistors on Shape Memory Polymers

et al. 2013

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Organic thin film transistors on shape memory polymers are fabricated by full photolithography. Devices show high mobility (0.2 cm(2) V(-1) s(-1)) and close to zero threshold voltage (-4.5 V) when characterized as fabricated. After 1, 10, and 100 deformation cycles and in a deformed, metastable shape memory transition state, changes in mobility and V(th) are measured and indicate sustained device functionality.

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Isotropically stretchable gold conductors on elastomeric substrates

Cited by 46 publications

References 26 publications

Highly Stretchable Gold Nanobelts with Sinusoidal Structures for Recording Electrocorticograms

Highly Stretchable Gold Nanobelts with Sinusoidal Structures for Recording Electrocorticograms

Highly stretchable wrinkled gold thin film wires

Mechanical Cycling Stability of Organic Thin Film Transistors on Shape Memory Polymers

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