Sensing and memorising liquids with polarity-interactive ferroelectric sound

Kim, Jong Sung; Kim, Eui Hyuk; Park, Chanho; Kim, Gwangmook; Jeong, Beomjin; Kim, Kang Lib; Lee, Seungwon; Hwang, Ihn; Han, Hyowon; Lee, Seokyeong; Shim, Wooyoung; Huh, June

doi:10.1038/s41467-019-11478-1

Cited by 29 publications

(21 citation statements)

References 54 publications

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“…With some reservations, such configuration can be considered to be related to double-insulation AC-driven tandem LEDs 15 . We should also mention recent paper on liquid-interactive ferroelectric sound devices based on the planar AC architecture with a top liquid electrode, in which the vertically oscillating AC field generates sound from a piezoelectric layer and utilized for the detection of the polarity of the top liquid polar bridge 30 .…”

Section: Resultsmentioning

confidence: 99%

Three-phase electric power driven electroluminescent devices

Perepichka

Bai

et al. 2021

Nat Commun

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Current power supply networks across the world are mostly based on three-phase electrical systems as an efficient and economical way for generation, transmission and distribution of electricity. Now, many electrically driven devices are relying on direct current or single-phase alternating current power supply that complicates utilization of three-phase power supply by requiring additional elements and costly switching mechanisms in the circuits. For example, light-emitting devices, which are now widely used for displays, solid-state lighting etc. typically operate with direct current power sources, although single-phase alternating current driven light-emitting devices have also gained significant attention in the recent years. Yet, light-emitting devices directly driven by a three-phase electric power has never been reported before. Benefiting from our precious work on coplanar electrodes structured light-emitting devices, in this article we demonstrate proof of a concept that light-emitting components can be driven by three-phase electric power without utilizing intricate back-end circuits and can compose state detection sensors and pixel units in a single device inspiring from three primary colors. Here we report a three-phase electric power driven electroluminescent devices fabricated featuring of flexibility and multi-functions. The design consists of three coplanar electrodes with dielectric layer(s) and light emission layer(s) coated on a top of input electrodes. It does not require transparent electrodes for electrical input and the light emission occurs when the top light-emitting layers are connected through a polar bridge. We demonstrate some applications of our three-phase electric power driven electroluminescent devices to realize pixel units, interactive rewritable displays and optical-output sensors. Furthermore, we also demonstrate the applicability of three-phase electrical power source to drive organic light-emitting devices with red, green and blue-emitting pixels and have shown high luminance (up to 6601 cd/m2) and current efficiency (up to 16.2 cd/A) from fabricated three-phase organic light-emitting devices. This novel geometry and driving method for electroluminescent devices is scalable and can be utilized even in a wider range of other types of light-emitting devices and special units.

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Section: Resultsmentioning

confidence: 99%

Three-phase electric power driven electroluminescent devices

Perepichka

Bai

et al. 2021

Nat Commun

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“…A function generator (Agilent 33220A) connected with a high-voltage amplifier (TREK 623B) was used for EL driving of the NV-MED. The device structure and the entire measurement system used to evaluate the impedance and luminance were the same ones in our previous research paper 8 , 11 , 16 . All measurements were performed under ambient conditions in air.…”

Section: Methodsmentioning

confidence: 99%

“…Owing to the tremendous demand for electronic skin (e-skin), which can artificially mimic the properties of human skin such as the ability to sense pressure, temperature, and humidity, most HIDs have emphasised on the visualisation of these functions, giving rise to a variety of human-interactive pressure [6][7][8][9][10][11] , temperature 12 , and humidity 13,14 displays. The visualisation of phenomena that is rarely sensible, such as magnetic fields, ultrasonic waves, and odourless toxic gases or liquids, can further broaden the utilisation of HIDs [15][16][17][18][19] .…”

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confidence: 99%

3D motion tracking display enabled by magneto-interactive electroluminescence

et al. 2020

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Development of a human-interactive display enabling the simultaneous sensing, visualisation, and memorisation of a magnetic field remains a challenge. Here we report a skin-patchable magneto-interactive electroluminescent display, which is capable of sensing, visualising, and storing magnetic field information, thereby enabling 3D motion tracking. A magnetic field-dependent conductive gate is employed in an alternating current electroluminescent display, which is used to produce non-volatile and rewritable magnetic field-dependent display. By constructing mechanically flexible arrays of magneto-interactive displays, a spin-patchable and pixelated platform is realised. The magnetic field varying along the z-axis enables the 3D motion tracking (monitoring and memorisation) on 2D pixelated display. This 3D motion tracking display is successfully used as a non-destructive surgery-path guiding, wherein a pathway for a surgical robotic arm with a magnetic probe is visualised and recorded on a display patched on the abdominal skin of a rat, thereby helping the robotic arm to find an optimal pathway.

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“…Deformable microelectronics is one of the most rapidly growing research fields owing to the tremendous demand for the development of highly integrated human-interactive wearable and patchable electronic and photonic skins. [1][2][3] A deformable microelectronic system consisting of numerous photoelectronic components requires high-resolution and high-conductance interconnectors with excellent mechanical resilience to be directly micropatterned onto a microcircuitry board. Existing interconnectors based on conventional metals are impractical for such applications based on their intrinsic fragility under deformation.…”

Section: Doi: 101002/adma202002178mentioning

confidence: 99%

Autonomous Surface Reconciliation of a Liquid‐Metal Conductor Micropatterned on a Deformable Hydrogel

et al. 2020

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Spreading liquid droplets on solid surfaces is a core topic in physical chemistry with significant technological implications. Liquid metals, which are eutectic alloys of constituent metal atoms with low melting temperatures, are practically useful, but difficult to spread on solid surfaces because of their high surface tension. This makes it difficult to use liquid metals as deformable on‐board microcircuitry electrodes, despite their intrinsic deformability. In this study, it is discovered that eutectic gallium–indium (EGaIn) can be spread onto the surface of chemically cross‐linked hydrogels consisting of aliphatic alkyl chains with numerous hydroxyl groups (OH), thus facilitating the development of directly micropatterned EGaIn electrodes. More importantly, EGaIn patterned on a hydrogel autonomously reconciliates its surface to form a firm hydrogel interface upon mechanical deformation of the hydrogel. This autonomous surface reconciliation of EGaIn on hydrogels allows researchers to reap the benefits of chemically modified hydrogels, such as reversible stretching, self‐healing, and water‐swelling capability, thereby facilitating the fabrication of superstretchable, self‐healable, and water‐swellable liquid‐metal electrodes with very high conductance tolerance upon deformation. Such electrodes are suitable for a variety of deformable microelectronic applications.

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Sensing and memorising liquids with polarity-interactive ferroelectric sound

Cited by 29 publications

References 54 publications

Three-phase electric power driven electroluminescent devices

Three-phase electric power driven electroluminescent devices

3D motion tracking display enabled by magneto-interactive electroluminescence

Autonomous Surface Reconciliation of a Liquid‐Metal Conductor Micropatterned on a Deformable Hydrogel

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