Bio-inspired non-iridescent structural coloration enabled by self-assembled cellulose nanocrystal composite films with balanced ordered/disordered arrays

Dong, Xiu; Zhang, Ze-Lian; Zhao, Yanli; Dong, Li Hua; Wang, Zili; Wang, Chen; Song, Fei; Wang, Xiuli; Wang, Yu‐Zhong

doi:10.1016/j.compositesb.2021.109456

Cited by 27 publications

(9 citation statements)

References 54 publications

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“…39−41 The morphology of as-prepared CNCs is determined using TEM (Figure 1a), whose average length and width are calculated to be 183 ± 12 and 17 ± 2 nm, respectively; this is comparable to the relevant works. 35,36,42 As reported before, CNCs obtained by sulfuric acid hydrolysis are negatively charged due to sulfate groups (Figure S3). Herein, the ζ potentials of CNC/HEA/ Glu suspensions with the Glu mass ratios of 0, 0.2, and 0.4 are −56.0, −55.4, and −53.1 mV, respectively (Figure 1b), which are greater than a critical value (−25 mV), guaranteeing the stable dispersion of CNCs in water without flocculation.…”

Section: ■ Results and Discussionsupporting

confidence: 62%

“…The results indicate the successful introduction of sulfate groups on the CNC surface . Additionally, the characteristic planes of (101), (101̅), (002), and (040) of cellulose I at 14.94, 16.68, 22.79, and 34.21°, respectively, are observed for the pristine cotton and CNC (Figure S2), suggesting the well maintenance of the crystalline domain of cellulose during the acid hydrolysis process. − The morphology of as-prepared CNCs is determined using TEM (Figure a), whose average length and width are calculated to be 183 ± 12 and 17 ± 2 nm, respectively; this is comparable to the relevant works. ,, As reported before, CNCs obtained by sulfuric acid hydrolysis are negatively charged due to sulfate groups (Figure S3). Herein, the ζ potentials of CNC/HEA/Glu suspensions with the Glu mass ratios of 0, 0.2, and 0.4 are −56.0, −55.4, and −53.1 mV, respectively (Figure b), which are greater than a critical value (−25 mV), guaranteeing the stable dispersion of CNCs in water without flocculation .…”

Section: Resultsmentioning

confidence: 97%

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Bioinspired Optical Flexible Cellulose Nanocrystal Films with Strain-Adaptive Structural Coloration

et al. 2022

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Recent advances of photonic crystals are driven to mechanical sensors and smart wearable devices; however, for chiral photonic cellulose nanocrystal (CNC) materials, vivid structural coloration and reversible mechanochromism like chameleon skin remain a big challenge. Here, we report a ternary co-assembly and post-UV-irradiation polymerization strategy to develop flexible and elastic CNC composite films, which, notably, have naked-eye-visible brilliant structural colors and stretching-induced color change covering a broad wavelength region at a moderate deformation (like skin). By adjusting the stretching, the film is designed as a smart skin to adapt to surrounding environments for camouflage. This work offers a universal strategy for constructing biomimic optically functional cellulose skins.

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Section: ■ Results and Discussionsupporting

confidence: 62%

Section: Resultsmentioning

confidence: 97%

Bioinspired Optical Flexible Cellulose Nanocrystal Films with Strain-Adaptive Structural Coloration

et al. 2022

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“…According to a previous work, CNC films exhibiting structural colors are prepared through self-assembly into chiral nematic liquid crystalline textures. The zeta potential of neat CNC suspension is −36.06 mV due to the sulfonic groups (Figure S1); the negative charge is sufficient for the stability of the suspension .…”

Section: Results and Discussionmentioning

confidence: 99%

A Surface Diffusion Barrier Strategy toward Water-Resistant Photonic Materials for Accurate Detection of Ethanol

Wang

Deng

Dong

et al. 2022

ACS Appl. Mater. Interfaces

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Photonic materials that enable visual detection of chemicals have shown great potential for wide applications in chemical, environmental, biotechnological, and food industries, but until now, using hydrophilic photonic materials for tracing watersoluble chemicals remains a major challenge due to the strong water interference. Here, we demonstrate a two-step co-assembly and subsequent surface coating strategy to develop an ethanolsensitive and anti-water interference photonic crystal film. By using citric acid as a co-assembly phase, high ethanol sensing is realized because of the strong intermolecular affinity. By controlling the thickness of the outer polyvinyl butyral layer, selective ethanol penetration but a water barrier is enabled. Notably, the composite photonic films are free-standing, highly flexible, and controllably structurally colored. We further present using the composite film to quantitatively trace ethanol/water mixtures and potentially track drunk driving as a colorimetric sensor. The heuristic two-step modification strategy proposed in this work not only overcomes the limitation of water interference for hydrophilic colorimetric sensors but also provides references to develop more new photonic materials with water resistance that need to be applied in water/humid environments.

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“…Its bionic porous structure provides the possibility to monitor the local temperature field in the capsule space. Moreover, similar to a nutrient delivery system of plants, this bionic structure is expected to be used as a carrier for special drugs in the field of biomedicine while realizing real-time temperature monitoring. − Our work possibly enriches the application range of luminescence thermometry and paves a way for setting up a novel 3D optical thermometer.…”

Section: Introductionmentioning

confidence: 96%

Bioinspired CS@PAN Electrospun Fibrous Aerogels with Vertical Capsule Vessels for Self-Feedback Temperature Sensing

Kong

Shen

et al. 2022

ACS Appl. Electron. Mater.

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Unconventional sensors with characteristics of portability, safety, remote manipulation, and high spatiotemproal resolution are highly desirable to detect varied temperature under specific conditions such as local temperature fields of the microenvironment. Herein, a 3D high-performance optical thermometry platform driven by the up-conversion green fluorescence of Er3+/Yb3+ co-doped electrospun fibrous aerogels is developed. The system simply consists of polycrystalline-encapsulated (Y1–x–y Er x Yb y )2O2S/polyacrylonitrile (YOS-EY/PAN) electrospun fibers and chitosan (CS). The flexible fibers form a hierarchically ordered bionic cellular structure through bio-based cross-linking, which avoids toxic chemical cross-linking. Additionally, the intense green emission is ascribed to 2H11/2/4S3/2 → 4I15/2 transitions, as the main indicator to determine the relative sensitivity of 1.22% K–1 at 303 K. More importantly, multipoint dispersed lanthanide (Ln) between cell walls confers stronger temperature sensing capability to aerogels. The successful strategy provides insights for the development of luminescence thermometry and opens a window for multidimensional temperature sensing.

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Bio-inspired non-iridescent structural coloration enabled by self-assembled cellulose nanocrystal composite films with balanced ordered/disordered arrays

Cited by 27 publications

References 54 publications

Bioinspired Optical Flexible Cellulose Nanocrystal Films with Strain-Adaptive Structural Coloration

Bioinspired Optical Flexible Cellulose Nanocrystal Films with Strain-Adaptive Structural Coloration

A Surface Diffusion Barrier Strategy toward Water-Resistant Photonic Materials for Accurate Detection of Ethanol

Bioinspired CS@PAN Electrospun Fibrous Aerogels with Vertical Capsule Vessels for Self-Feedback Temperature Sensing

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