Versatile energy loss conversion for recovering waste alternating potential through polarization transfer medium

Yong, Hyungseok; Heo, Deokjae; Kim, Banseok; Moon, Haksung; Choi, Kyungwho; Kim, Dongseob; Lee, Sang‐Min

doi:10.1016/j.nanoen.2019.104400

Cited by 10 publications

(10 citation statements)

References 28 publications

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“…In a WiSID, the source AC power is mainly transferred through two coupling capacitors, and the power transfer capability of the coupling capacitors is determined by their impedance ( Z CC ), defined as

{Z_{{\rm{CC}}}} = 1{\rm{/}}\left( {2\pi f{C_{{\rm{coupling}}}}} \right)

, where f is the frequency of the source AC field and C coupling is the total capacitance of the coupling capacitors. [ 46–50 ] We systematically examined how power transfer performance of a WiSID varies with factors affecting C coupling , such as the distance between the AC power unit and the sensing display part (physical gap for remote operation), the area of the AC power unit and the sensing display coupling electrode, and the permittivity (polarity) of the gap medium; the results are shown in Figures 1i–k, respectively. The effect of the AC power frequency was also evaluated (Figure S6b, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

“…, where f is the frequency of the source AC field and C coupling is the total capacitance of the coupling capacitors. [46][47][48][49][50] We systematically examined how power transfer performance of a WiSID varies with factors affecting C coupling , such as the distance between the AC power unit and the sensing display part (physical gap for remote operation), the area of the AC power unit and the sensing display coupling electrode, and the permittivity (polarity) of the gap medium; the results are shown in Figures 1i-k, respectively. The effect of the AC power frequency was also evaluated (Figure S6b, Supporting Information).…”

Section: Factors Affecting Direct Capacitive Coupling In a Wisidmentioning

confidence: 99%

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Wireless Stand‐Alone Trimodal Interactive Display Enabled by Direct Capacitive Coupling

Jang

Lee

et al. 2022

Advanced Materials

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With recent advances in interactive displays, the development of a standalone interactive display with no electrical interconnection is of great interest. Here, a wireless stand-alone interactive display (WiSID), enabled by direct capacitive coupling, consisting of three layers: two in-plane metal electrodes separated by a gap, a composite layer for field-induced electroluminescence (EL) and inverse piezoelectric sound, and a stimuli-responsive layer, from bottom to top, is presented. Alternating current power necessary for fieldinduced EL and inverse piezoelectric sound is wirelessly transferred from a power unit, with two in-plane electrodes remotely separated from the WiSID. The unique in-plane power transfer through the stimuli-sensitive polar bridge allows stand-alone operation of the WiSID, making it suitable for the wireless dynamic monitoring of medical fluids. Moreover, a haptic wireless stand-alone trimodal interactive display mounted on a human finger is demonstrated, whereby touch is wirelessly displayed in various outputs of EL, inverse piezoelectric sound, and tactile vibration, making it suitable for a wireless three-mode smart braille display.

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{Z_{{\rm{CC}}}} = 1{\rm{/}}\left( {2\pi f{C_{{\rm{coupling}}}}} \right)

Section: Resultsmentioning

confidence: 99%

Section: Factors Affecting Direct Capacitive Coupling In a Wisidmentioning

confidence: 99%

Wireless Stand‐Alone Trimodal Interactive Display Enabled by Direct Capacitive Coupling

Jang

Lee

et al. 2022

Advanced Materials

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“…In addition, the triboelectrification in human physical activities (gait cycle) generates a low-frequency and non-sinusoidal alternating potential (0–6 Hz) . These waste AC energies can be transferred through various dielectric materials, as shown in eq − normal∇ · ( ϵ 0 ϵ r ∇ V ) = ρ …”

mentioning

confidence: 99%

“…29 These waste AC energies can be transferred through various dielectric materials, as shown in eq 1. 26 •…”

mentioning

confidence: 99%

“…In order to minimize the incidental batteries and wiring, a new approach, material-mediated energy transfer, has been attempted in various fields. − Material-mediated energy transfer utilizes waste AC energy that polarizes the surrounding material by time-varying electric potential from moving electrons (Figure a). From this perspective, electronic devices using AC energy sources generate a low-frequency and sinusoidal alternating potential (50–60 Hz according to national utility frequency) that polarize surrounding materials and dissipate in the form of AC electric fields.…”

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Body-Mediated Bioelectronics for Zero-Powered Ion Release and Electrical Stimulation

et al. 2022

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Development of bioelectronics that can be used permanently in daily life without additional power sources is an important research goal. To this end, myriad permanent systems based on energy harvesting have been reported; however, there are still limitations, such as restrictions regarding specific installations and connections to lines. Herein, we present a new type of bioelectronics based on body-mediated energy transfer for zero-powered ion release and electrical stimulation. Body-mediated bioelectronics (BMB) is a new system that transfers electrical energy generated by various human activities (e.g., walking, using laptop) through the human body without energy loss. To apply the BMB to human skin, a biocompatible and skin-adhesive soft ion-diffusive hydrogel (IDH) was utilized as the bioelectrode. Finally, a BMB patch composed of IDHs with an iontophoretic structure was applied to the human body, and zero-powered electrical stimulation as well as active ion emission were implemented in daily life.

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Unraveling the Missing Link of Bio‐Electrical Stimulation from Body‐Mediated Energy Transfer

Jung

Yong

Lee

et al. 2023

Adv Funct Materials

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As the technologies for treating diseases are attracting continuous attention, physical therapy methods, particularly electrical stimulation (ES), have been widely investigated owing to their high effectiveness. As ES essentially requires an external power source, various efforts are being devoted to achieving the application of ES to the human body using nanogenerators. Various studies have verified the effect of ES by applying the same output generated by the device to in vitro and in vivo bio‐electrical stimulation. However, it is unknown whether the electrical output generated by the device can be transmitted equally in the cell unit, and this is considered a common missing link in bio‐electrical stimulation research. Herein, the missing link between electrical devices and in vitro bio‐electrical stimulations is unraveled by the ex vivo, 2D simulation, and in vitro study of body‐mediated energy transfer (BmET) models. In addition, BmET‐based ES is applied to pre‐osteoblasts, and the increased cellular functions are verified.

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Versatile energy loss conversion for recovering waste alternating potential through polarization transfer medium

Cited by 10 publications

References 28 publications

Wireless Stand‐Alone Trimodal Interactive Display Enabled by Direct Capacitive Coupling

Wireless Stand‐Alone Trimodal Interactive Display Enabled by Direct Capacitive Coupling

Body-Mediated Bioelectronics for Zero-Powered Ion Release and Electrical Stimulation

Unraveling the Missing Link of Bio‐Electrical Stimulation from Body‐Mediated Energy Transfer

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