Steric‐Repulsion‐Based Magnetically Responsive Photonic Crystals

Luo, Wei; Ma, Hui; Mou, Fangzhi; Zhu, Mingxing; Yan, Jindan; Guan, Jianguo

doi:10.1002/adma.201304134

Cited by 128 publications

(137 citation statements)

References 39 publications

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“…If the distance separating the composing particles within a PCC material can be varied by an external influence, the material can produce specific photonic responses upon stimulation. Such a concept of stimulus-responsive photonic colloidal crystalline arrays (SRPCCAs) has spawned a wide variety of promising sensors for temperature [7,8], pH [9,10], magnetic and electric fields [11][12][13], small molecules and biomolecular analytes [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Metal ion-responsive photonic colloidal crystalline micro-beads with electrochemically tunable photonic diffraction colours

Chiu

Ong

et al. 2016

Sensors and Actuators B: Chemical

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Section: Introductionmentioning

confidence: 99%

Metal ion-responsive photonic colloidal crystalline micro-beads with electrochemically tunable photonic diffraction colours

Chiu

Ong

et al. 2016

Sensors and Actuators B: Chemical

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“…As an important technical extension of responsive PhCs, magnetically tunable photonic systems have been developed through the self‐assembly of uniform superparamagnetic colloidal particles in liquid media, which provide a new platform for chromatic applications. The magnetic fields in these systems play a vital role in color modulation, with the benefits of contactless control, instant action and ease of integration into electronic devices.…”

Section: Introductionmentioning

confidence: 99%

Magnetochromic Photonic Hydrogel for an Alternating Magnetic Field‐Responsive Color Display

Wang

Fan

et al. 2017

Advanced Optical Materials

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or dynamic reflection spectral measurements. [18,19] The colors of the PhCs are related to a wide range of changes in the physical properties of the materials forming the photonic structures rather than specific chemical states responsible for absorption in a characteristic wavelength region. [20] Hence, the materials for fabricating PhCs have no specific chemical requirements. Regardless of its chemical properties, any material with a photonic structure can display iridescence as long as the PBG is located in the region of visible light wavelengths, which leads to the potential for broad applicability in colorimetric response.As an important technical extension of responsive PhCs, magnetically tunable photonic systems have been developed through the self-assembly of uniform superparamagnetic colloidal particles in liquid media, [21][22][23][24] which provide a new platform for chromatic applications. The magnetic fields in these systems play a vital role in color modulation, with the benefits of contactless control, instant action and ease of integration into electronic devices. However, the colloidal stability of such systems is poor due to the chain aggregations of dynamically ordered assemblies induced by the magnetic packing force. [25][26][27] Using a polymer matrix to stabilize the photonic structures is an ideal way to stabilize the diffraction color. Nevertheless, the magnetic field-responsive chromic capability will disappear because the ordered array structure is fixed by a polymer net. Consequently, considerable effort has been devoted to realizing color displays of polymers or hydrogels based on magnetic photonic chains exposed to various external stimuli. Many researchers have experimented with the manipulation of humidity with a saturated salt solution to drive color changes in magnetic polymers. [28][29][30] Other researchers have investigated the thermochromic display of magnetic hydrogels by changing their temperature with a water-bath control system. [31,32] However, nearly all of these previously explored stimuli require physical contact with the polymers or hydrogels, which may limit their applications. Therefore, new approaches for color displays of solidified magnetic polymers or hydrogels that operate in a contactless way are still anticipated.In this work, we develop a novel approach for magnetochromic displays with a solid magnetic photonic hydrogel. Color switching is initiated by an alternating magnetic field As an external stimulus for stimuli-responsive chromic materials, a magnetic field has the benefits of contactless control, instant action, and ease of integration into electronic devices. Hence, the development of a magnetically responsive photonic crystal provides a new platform for color displays. However, magnetically controlled display systems have been primarily limited to liquid systems of colloidal crystals; their application to solid chromic systems has been difficult because the ordered array structure is fixed by a polymer network. A novel solid magnetochromic photonic ...

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“…Polymer composites are involved in a number of fields such as electrochemistry, optics and biology because of their combining characteristics of polymers and grafted functional materials . Polymers used as the substrate of polymer composites for its colloid stability and membrane forming properties . Among them, some polymers have special properties including low toxicity, physiological inertia and excellent biological compatibility .…”

Section: Introductionmentioning

confidence: 99%

Renewable Lanthanide Ionic Liquid/Polymer Composites for High‐Efficient Adsorption of Particulate Matter

Song

Zhang

et al. 2017

Adv Materials Inter

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Particulate matter (PM) in air pollution is becoming a serious environmental threat to public health globally. The removal of PM, particularly the most harmful PM2.5, is a great challenge for industrialized countries. Hybrid polymer materials have extensive applications in many areas. Herein, types of hybrid polymers obtained from lanthanide ionic liquids and polyvinyl pyrrolidone have excellent PM adsorption capacity especially for PM2.5. The highest adsorption efficiency can exceed 99% for both PM2.5 and PM10. The removal efficiency of PM can be maintained above 90% for 15 h, which can be recycled more than five times without the decline of adsorption efficiency. An introduced luminescent lanthanide can be used to survey the adsorption process by the change of fluorescence intensity. After simple treatment, the PM adsorption capacity of the hybrid polymer can be recovered to be similar with the new one. Besides, the hybrid polymers have favorable thermal stability to adapt to different working conditions. Therefore, the hybrid polymers have potential applications in a high‐efficiency and environmental friendly PM removal filter.

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Steric‐Repulsion‐Based Magnetically Responsive Photonic Crystals

Cited by 128 publications

References 39 publications

Metal ion-responsive photonic colloidal crystalline micro-beads with electrochemically tunable photonic diffraction colours

Metal ion-responsive photonic colloidal crystalline micro-beads with electrochemically tunable photonic diffraction colours

Magnetochromic Photonic Hydrogel for an Alternating Magnetic Field‐Responsive Color Display

Renewable Lanthanide Ionic Liquid/Polymer Composites for High‐Efficient Adsorption of Particulate Matter

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