Handwritten, Soft Circuit Boards and Antennas Using Liquid Metal Nanoparticles

Lin, Yiliang; Cooper, Christopher B.; Wang, Meng; Adams, Jack A.; Genzer, Jan; Dickey, Michael D.

doi:10.1002/smll.201502692

Cited by 254 publications

(247 citation statements)

References 42 publications

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“…Recent advances in material science and chemical engineering have resulted in conductive polymers for the creation of flexible and stretchable electronics [128], conductive yarns [152], foils [137], liquid metals [44,128,125], and non-rigid micro and nano-structures [83,193]. These new materials are well suited for interfacing with the organic and dynamic contours of the human body.…”

Section: Enabling Flexible and Stretchable Applicationsmentioning

confidence: 99%

Finding Common Ground

Große-Puppendahl

Holz

Cohn

et al. 2017

Proceedings of the 2017 CHI Conference on Human Factors in Computing Systems

164

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For more than two decades, capacitive sensing has played a prominent role in human-computer interaction research. Capacitive sensing has become ubiquitous on mobile, wearable, and stationary devices-enabling fundamentally new interaction techniques on, above, and around them. The research community has also enabled human position estimation and whole-body gestural interaction in instrumented environments. However, the broad field of capacitive sensing research has become fragmented by different approaches and terminology used across the various domains. This paper strives to unify the field by advocating consistent terminology and proposing a new taxonomy to classify capacitive sensing approaches. Our extensive survey provides an analysis and review of past research and identifies challenges for future work. We aim to create a common understanding within the field of human-computer interaction, for researchers and practitioners alike, and to stimulate and facilitate future research in capacitive sensing.

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Section: Enabling Flexible and Stretchable Applicationsmentioning

confidence: 99%

Finding Common Ground

Große-Puppendahl

Holz

Cohn

et al. 2017

Proceedings of the 2017 CHI Conference on Human Factors in Computing Systems

164

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“…1 Gallium (melting point, mp 29.8 °C) and its alloys, such as eutectic gallium indium (EGaIn, 2 mp 15.5 °C) and gallium indium tin (Galinstan, 3 mp –19 °C), are promising alternatives to mercury due to their negligible vapor pressure 4 and low-toxicity. 5 Gallium-based liquid metals have applications in microfluidic systems and soft electronics, 6 such as stretchable wires, 7 soft circuits, 8 inductors, 9 antennas, 10 pumps, 11 electrodes, 12 sensors 13 and memristors. 14 In particular, colloidal droplets of liquid metal have applications as pumps, 11 mixers, 15 sensors, 16 soft circuit elements, 17 catalysts, 18 and drug delivery systems.…”

Section: Introductionmentioning

confidence: 99%

Shape-transformable liquid metal nanoparticles in aqueous solution

et al. 2017

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“…Electrical components can be easily inserted in these soft circuit boards without the need for soldering. 25 Of course, these handwritten circuit boards cannot match the resolution or sophistication currently achievable with traditional PCB.…”

Section: Handwritten Circuits Via 'Mechanical Sintering'mentioning

confidence: 98%

“…The EGaIn nanoparticles are not conductive because of the presence of a surface oxide. 25 When pressure is applied, the particles merge to form conductive paths. This path creates circuits that are soft, flexible, and can be shaped in any pattern.…”

Section: Handwritten Circuits Via 'Mechanical Sintering'mentioning

confidence: 99%

Recent applications of liquid metals featuring nanoscale surface oxides

Neumann

Dickey

2016

SPIE Proceedings

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This proceeding describes recent efforts from our group to control the shape and actuation of liquid metal. The liquid metal is an alloy of gallium and indium which is non-toxic, has negligible vapor pressure, and develops a thin, passivating surface oxide layer. The surface oxide allows the liquid metal to be patterned and shaped into structures that do not minimize interfacial energy. The surface oxide can be selectively removed by changes in pH or by applying a voltage. The surface oxide allows the liquid metal to be 3D printed to form free-standing structures. It also allows for the liquid metal to be injected into microfluidic channels and to maintain its shape within the channels. The selective removal of the oxide results in drastic changes in surface tension that can be used to control the flow behavior of the liquid metal. The metal can also wet thin, solid films of metal that accelerates droplets of the liquid along the metal traces .Here we discuss the properties and applications of liquid metal to make soft, reconfigurable electronics.

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Handwritten, Soft Circuit Boards and Antennas Using Liquid Metal Nanoparticles

Cited by 254 publications

References 42 publications

Finding Common Ground

Finding Common Ground

Shape-transformable liquid metal nanoparticles in aqueous solution

Recent applications of liquid metals featuring nanoscale surface oxides

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