Spatially Pressure‐Mapped Thermochromic Interactive Sensor

Kim, Gwangmook; Cho, Sungjun; Chang, KyungHi; Kim, Wook Sung; Kang, Hansaem; Ryu, Sung Pil; Myoung, Jae‐Min; Park, Jinwoo; Park, Cheolmin; Shim, Wooyoung

doi:10.1002/adma.201606120

Cited by 96 publications

(78 citation statements)

References 40 publications

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“…In this context, Yu et al 27 developed an adaptive optoelectronic camouflage on the basis of the integration of thermochromic dyes with arrays of actuators and photo-detectors laminated on transparent and flexible substrates. A second example is reported by Kim et al, 28 demonstrating the mechanism and performance of a resistive pressure sensor and its integration into a dynamic and interactive thermochromic panel.…”

Section: ■ Introductionmentioning

confidence: 99%

Visible Thermochromism in Vanadium Pentoxide Coatings

Kumar

Qadir

Maury

et al. 2017

ACS Appl. Mater. Interfaces

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OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. ABSTRACT: Although di-vanadium pentoxide (V 2 O 5 ) has been a candidate of extensive research for over half a century, its intrinsic thermochromism has not been reported so far. Films of V 2 O 5 grown on silicon, glass, and metal substrates by metal organic chemical vapor deposition in this study exhibit a thermally induced perceptible color change from bright yellow to deep orange. Temperature-dependent UV− vis spectroscopy and X-ray diffraction allow the correlation between the reversible continuous red shift of the absorption and the anisotropic thermal expansion along the (001) direction, that is, perpendicular to the sheets constituting the layered structure. Furthermore, the possibility of tuning the thermochromic behavior was demonstrated via a chemical doping with chromium.

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Section: ■ Introductionmentioning

confidence: 99%

Visible Thermochromism in Vanadium Pentoxide Coatings

Kumar

Qadir

Maury

et al. 2017

ACS Appl. Mater. Interfaces

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“…This approach, commonly studied in the area of stimuli-interactive displays, utilizes the active matrix circuitry associated with active circuit elements such as transistors to provide precise spatial recognition 3 . For instance, tunable coloration/light emission have been successfully demonstrated by combining optical elements with pressure sensors, allowing for the visualization of pressure; examples include organic light emitting diodes (OLEDs) 18 and electroluminescent 19 , electrochromic 20 , thermochromic 21,22 , and triboelectrification devices 23 . The visualization of a large strain of over 50% is required for wearable and skin-mountable sensors.…”

Section: Introductionmentioning

confidence: 99%

Block copolymer structural color strain sensor

et al. 2018

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The development of electrically responsive sensors based on the capacitance, voltage, and resistance that can detect and simultaneou sly visualize the large strain involved with human motion is in great demand. Here, we demonstrate a highly stretchable, large strain capacitive sensor that can visualize strain based on the strain-responsive structural color (SC). Our device contains an elastomeric sensing film that produces a capacitance change under strain, in which a selfassembled block copolymer (BCP) photonic crystal (PC) film with 1D periodic in-plane lamellae aligned parallel to the film surface is embedded for the efficient visualization of strain. The capacitance change arises from changes in the dimensions of the elastomer film under strain. The mechanochromic BCP PC film responds to strain, giving rise to an SC change with strain. The initial red SC of the sensor blueshifts and turns blue when the sensor is stretched to 100%, resulting in a full-color SC alteration as a function of the strain. Our BCP SC strain sensor exhibits a fast strain response with multi-cycle reliability of both the capacitance and SC changes over 1000 cycles. This property allows for efficient visible recognition not only of the strained positions during finger bending and poking with a sharp object but also of the shapes of the strained objects.

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“…Thermochromic materials have received increasing interest as it can present different colors with the change of ambient temperature, showing various functions such as sensing, indicating and monitoring, etc . The applications of thermochromic materials can endow the substrates with function of temperature responsive color change.…”

Section: Introductionmentioning

confidence: 99%

Raspberry‐Shaped Thermochromic Energy Storage Nanocapsule with Tunable Sunlight Absorption Based on Color Change for Temperature Regulation

Wan

Wang

Chen

et al. 2019

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A novel raspberry‐shaped thermochromic energy storage nanocapsule (RTESN) is successfully designed and fabricated with switchable sunlight absorption capacity based on color change for temperature regulation. The RTESN is developed by grafting amino‐modified silica shell thermochromic nanoparticles (amino‐TLD@SiO2) on the surface of epoxy‐functionalized energy storage nanocapsules (paraffin@PSG), with a total particle size about 450 nm. RTESN exhibits a deep color under low temperatures, which can absorb sunlight for heating. During the continuous thermal energy supply, paraffin@PSG is capable of storing thermal energy owing to its large latent heat capacity of 118.7 J g–1, thereby maintaining the slow temperature increase. When the temperature is higher than the phase change temperature of paraffin@PSG, the color of amino‐TLD@SiO2 turns to white with more reflection of sunlight so that it reduces the absorption of thermal energy and prevents the further increase of temperature. The thermal regulation behavior is confirmed by setting up a wooden house with the surface covered with RTESN. Compared with the blank wooden house, the RTESN covered wooden house (RTESN‐H) displays thermal insulation performances during heating and cooling with a maximum temperature difference of 7 °C.

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Spatially Pressure‐Mapped Thermochromic Interactive Sensor

Cited by 96 publications

References 40 publications

Visible Thermochromism in Vanadium Pentoxide Coatings

Visible Thermochromism in Vanadium Pentoxide Coatings

Block copolymer structural color strain sensor

Raspberry‐Shaped Thermochromic Energy Storage Nanocapsule with Tunable Sunlight Absorption Based on Color Change for Temperature Regulation

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