Stretchable and bendable carbon nanotube on PDMS super-lyophobic sheet for liquid metal manipulation

Kim, Dae-Young; Jung, Daewoong; Yoo, Jun Hyeon; Lee, Yunho; Lee, Gil S.; Yoo, Koangki; Lee, Jeong

doi:10.1088/0960-1317/24/5/055018

Cited by 38 publications

(31 citation statements)

References 28 publications

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“…Several methods exist to avoid adhesion of the oxide‐coated metal. Rough surfaces (Figure b) helps prevent adhesion, yet it is challenging to fabricate non‐wetting surfaces on the interior of small microcapillaries. Alternatively, pre‐filling the channel with a “carrier fluid” prior to injection of the metal creates a “slip layer” between the metal plug and the wall, which prevents adhesion .…”

Section: Reconfigurablementioning

confidence: 99%

Stretchable and Soft Electronics using Liquid Metals

2017

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can be patterned into non-spherical shapes using both conventional and unconventional methods to form highly conductive, durable, and stretchable wires, interconnects, and antennas. The deformation limits of conductors formed with liquid metal are only limited -in principle -by the mechanical properties of the encasing material. The geometrical changes to the metal during deformation can be harnessed to form softer-than-skin sensors of strain and touch. Liquid metals can also be utilized as active components in memory devices, diodes, electrodes, and capacitors built entirely from soft materials. In addition, liquid metals can form circuits that are self-healing and shape-reconfigurable.There are many exciting and promising applications that harness the unique properties of liquid metals. Recent advances, opportunities, and challenges with liquid metals based on gallium within the context of stretchable and soft electronics are discussed here.

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Section: Reconfigurablementioning

confidence: 99%

Stretchable and Soft Electronics using Liquid Metals

2017

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“…Recently, artificial skin‐like wrinkling materials have been proposed as a powerful multifunctional structure for several applications including flexible electronics, self‐assembling 3D architectures, bioactive materials, particle sieves, and membrane technologies . These multifunctional materials are commonly fabricated by deposition of flat 2D solid thin films such as silica, gold, carbon nanotubes, graphene, and thin polystyrene films on prestretched elastomeric substrates. Relaxation of the prestretched substrate wrinkles the top film into a multiscale nano–micro rough hierarchical structure, with demonstrated potential for enabling tunable wettability …”

Section: Introductionmentioning

confidence: 99%

Strain Engineering of Wave‐like Nanofibers for Dynamically Switchable Adhesive/Repulsive Surfaces

Wong

Gutruf

Sriram

et al. 2015

Adv Funct Materials

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399wileyonlinelibrary.com number of coatings utilized in tissue engineering, [ 5 ] microfl uidics, [ 6,7 ] and drug delivery. [ 8 ] In particular, owing to their advantages of not requiring bulk peristaltic systems, dynamically switchable [ 1,9 ] superhydrophobic and hydrophilic surfaces [ 10,11 ] are a potential cornerstone of next generation microfl uidics devices. [ 7,12 ] Recently, tunable [ 11 ] surfaces based on arrays of aligned nanopillars have been achieved by controlled shapeshifting of surface texturing and wettability. [ 8,13 ] However, the wide-spread utilization of such lithography-based ordered structures [ 14 ] is limited due to their limited scalability and high fabrication cost. Thus, the ability to achieve dynamic tuning of surface wetting with disordered morphologies is critical for their commercial application.Strain-induced modifi cation of the morphological features of a fi lm such as wrinkling and buckling is a fl exible actuation mechanism that is found in a multitude of scales in nature. These range from biocellular epidermal layers of skin [ 15 ] to geological wrinkles. [ 16 ] In synthetic processes, the spontaneous wrinkling of thin fi lms [ 17 ] has traditionally been treated as a defect, with signifi cant efforts directed toward the fabrication of perfectly fl at surfaces. [ 18 ] Recently, artifi cial skin-like wrinkling materials have been proposed as a powerful multifunctional structure for several applications including fl exible electronics, [ 19,20 ] self-assembling 3D architectures, [ 21,22 ] bioactive materials, [ 5,23 ] particle sieves, [ 15 ] and membrane technologies. [ 4,24 ] These multifunctional materials are commonly fabricated by deposition of fl at 2D solid thin fi lms such as silica, [ 15,23 ] gold, [ 5,25 ] carbon nanotubes, [ 26 ] graphene, [ 27 ] and thin polystyrene fi lms [ 28 ] on prestretched elastomeric substrates. Relaxation of the prestretched substrate wrinkles the top fi lm into a multiscale nano-micro rough hierarchical structure, with demonstrated potential for enabling tunable wettability. [ 5 ] Here, we demonstrate an alternative concept to achieve dynamically reversible wetting from hydrophobic to superhydrophobic and switchable droplet adhesion/repulsion. Our method is based on the facile and scalable incorporation of polystyrene nanofi ber layers on soft elastic substrates. By anisotropic stretching and self-relaxation of the elastic substrate, the originally 1D nanofi bers are reversibly transformed into Engineering surfaces that enable the dynamic tuning of their wetting state is critical to many applications including integrated microfl uidics systems, fl exible electronics, and smart fabrics. Despite extensive progress, most of the switchable surfaces reported are based on ordered structures that suffer from poor scalability and high fabrication costs. Here, a robust and facile bottom-up approach is demonstrated that allows for the dynamical and reversible switching between lotus leaf (repulsive) and rose petal (adhesive) states by strain engin...

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“…This method produced patterns of randomly oriented CNTs embedded in PDMS. To produce vertically aligned CNTs on PDMS, Kim et al used CVD to grow vertically aligned CNTs on a silicon wafer. With nanoimprint equipment, they transferred CNTs to a cured layer of PDMS by simply contacting the vertically aligned CNTs to the PDMS substrate.…”

Section: Processing Of Carbon Nanomaterials For Flexible Sensorsmentioning

confidence: 99%

Fabrication and Patterning Methods of Flexible Sensors Using Carbon Nanomaterials on Polymers

Costa

Choi

2020

Advanced Intelligent Systems

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Flexible sensors composed of carbon nanostructures and elastic materials have been developed for healthcare monitoring, environmental monitoring, disposable biochemical or electrochemical sensors, and many other applications. Fabrication approaches for such sensors and their advantages and current issues related to patterning high-performance flexible sensors are reviewed. A focus is placed on patterning techniques for carbon-based flexible sensors including carbon nanotubes, graphene, and other carbon nanostructures. First, novel patterning techniques for nanomaterials are described, along with their current challenges. Next, emerging flexible sensors including humidity, temperature, strain, and pressure sensors are discussed. Finally, the challenges and perspectives for flexible sensors are addressed. REVIEW www.advintellsyst.com

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Stretchable and bendable carbon nanotube on PDMS super-lyophobic sheet for liquid metal manipulation

Cited by 38 publications

References 28 publications

Stretchable and Soft Electronics using Liquid Metals

Stretchable and Soft Electronics using Liquid Metals

Strain Engineering of Wave‐like Nanofibers for Dynamically Switchable Adhesive/Repulsive Surfaces

Fabrication and Patterning Methods of Flexible Sensors Using Carbon Nanomaterials on Polymers

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