Multi-stimuli responsive chromism with tailorable mechanochromic sensitivity for versatile interactive sensing under ambient conditions

Zeng, Songshan; Sun, Haotian; Park, Cheonjin; Zhang, Monica; Zhu, Mengting; Yan, Ming; Chov, Nora; Li, Edward; Smith, Andrew T.; Xu, Gefan; Li, Shuliang; Hou, Zaili; Li, Yuntao; Wang, Bing; Zhang, Dianyun; Sun, Luyi

doi:10.1039/c9mh00851a

Cited by 52 publications

(38 citation statements)

References 39 publications

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“…These characteristics make PDMS one of the most popular stretchable and transparent substrates for biomedical, mechanochromic, and photoelectric devices. [ 5–7 , 8 ]…”

Section: Figurementioning

confidence: 99%

Transparency Change Mechanochromism Based on a Robust PDMS‐Hydrogel Bilayer Structure

Zeng

Xian

et al. 2020

Macromol. Rapid Commun.

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transparency, excellent resistance to UV radiation, high chemical stability, and reasonably low cost. [1-4] The fabrication of PDMS parts is typically a rapid-prototyping process often achieved by molding or spin-coating a viscous prepolymer with a curing agent. The cross-linking degree depends on the ratio of the prepolymer and the curing agent, which endows PDMS with tunable elastic modulus and stretchability. These characteristics make PDMS one of the most popular stretchable and transparent substrates for biomedical, mechanochromic, and photoelectric devices. [5-7,8] However, the hydrophobic nature of PDMS is a significant obstacle for its combination with hydrophilic materials requiring a strong interfacial adhesion. Various methods have been reported to improve the surface hydrophilicity of PDMS, including surface oxidization via plasma [9-11] or UV-ozone treatment, [12,13] silanization treatment, [14,15] and surface coating with hydrophilic materials. [16,17] Unfortunately, the surface hydrophilicity of PDMS generated by the above methods is typically temporary, which usually only Hydrogels and polydimethylsiloxane (PDMS) are complementary to each other, since the hydrophobic PDMS provides a more stable and rigid substrate, while the water-rich hydrogel possesses remarkable hydrophilicity, biocompatibility, and similarity to biological tissues. Herein a transparent and stretchable covalently bonded PDMS-hydrogel bilayer (PHB) structure is prepared via in situ free radical copolymerization of acrylamide and allylamineexfoliated-ZrP (AA-e-ZrP) on a functionalized PDMS surface. The AA-e-ZrP serves as cross-linking nano-patches in the polymer gel network. The covalently bonded structure is constructed through the addition reaction of vinyl groups of PDMS surface and monomers, obtaining a strong interfacial adhesion between the PDMS and the hydrogel. A mechanical-responsive wrinkle surface, which exhibs transparency change mechanochromism, is created via introducing a cross-linked polyvinyl alcohol film atop the PHB structure. A finite element model is implemented to simulate the wrinkle formation process. The implication of the present finding for the interfacial design of the PHB and PDMS-hydrogel-PVA trilayer (PHPT) structures is discussed.

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“…These characteristics make PDMS one of the most popular stretchable and transparent substrates for biomedical, mechanochromic, and photoelectric devices. [ 5–7 , 8 ]…”

Section: Figurementioning

confidence: 99%

Transparency Change Mechanochromism Based on a Robust PDMS‐Hydrogel Bilayer Structure

Zeng

Xian

et al. 2020

Macromol. Rapid Commun.

Self Cite

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“…Smart materials exhibit obvious changes under stimuli, such as light, electricity, mechanical force, heating, pH, and their combinations. [17][18][19][20][21][22][23][24][25] Specically, some remarkable reports have achieved multiple transformations of output in response to the stimulus input, rather than just output in a static form, which could further realize multilevel security. [26][27][28][29] Consequently, to simultaneously satisfy the requirements of high capacity information storage and anticounterfeiting, a suitable medium needs to meet at least two criteria: (1) expansion of 2D physical space to multidimensional space, and (2) multilevel transformations under stimulation.…”

Section: Introductionmentioning

confidence: 99%

Simultaneously achieving high capacity storage and multilevel anti-counterfeiting using electrochromic and electrofluorochromic dual-functional AIE polymers

Lü

Wang

et al. 2021

Chem. Sci.

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“…To this end, the introduction of color‐changing elements is necessary for interactive displays in view of human's better sensitivity to color perception. However, current colorimetric sensors (e.g., electrochromic dyes, [ 9 ] thermochromic dyes, [ 5a,10 ] and mechanochromic dyes [ 11 ] ) are subject to low brightness and low response speed due to inherent limitations of those chromic dyes. [ 5a,6b ] Moreover, those dyes can switch between only two color states, leading to relatively low‐contrast and low‐resolution visual interaction.…”

Section: Introductionmentioning

confidence: 99%

Interactively Full‐Color Changeable Electronic Fiber Sensor with High Stretchability and Rapid Response

Wang

Niu

et al. 2020

Adv Funct Materials

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Smart interactive electronic devices can dynamically respond to and visualize environmental stimuli. Inspired by the rapid color changes of natural creatures, an interactive electronic fiber sensor with high stretchability and tunable coloration is presented. It is based on an ingenious multi-sheath design on a piezoresistive electronic fiber coupled with a mechanochromic photonic crystal microtubule. It has the unique capabilities of sensing and visualizing its deformation simultaneously, by reconstructing conductive paths and regulating the lattice spacing of the photonic sheath. In particular, it exhibits dynamic color switching spanning the full visible region (from red to blue), fast optical/electrical response (≈80 ms), and a large working range (0-200%), allowing its application as a user-interactive sensor for dynamically monitoring large joint movements and muscle microvibrations of the human body in real time. This investigation provides a general platform for emerging interactive devices, which are promising for applications in wearable electronics, human-machine interactions, and intelligent robots.

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Multi-stimuli responsive chromism with tailorable mechanochromic sensitivity for versatile interactive sensing under ambient conditions

Abstract: A 3D integration strategy is applied to fabricate multi-stimuli responsive chromic devices that respond to UV, temperature, and mechanical stretching.

Cited by 52 publications

References 39 publications

Transparency Change Mechanochromism Based on a Robust PDMS‐Hydrogel Bilayer Structure

Transparency Change Mechanochromism Based on a Robust PDMS‐Hydrogel Bilayer Structure

Simultaneously achieving high capacity storage and multilevel anti-counterfeiting using electrochromic and electrofluorochromic dual-functional AIE polymers

Interactively Full‐Color Changeable Electronic Fiber Sensor with High Stretchability and Rapid Response

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