Janus Suprabead Displays Derived from the Modified Photonic Crystals toward Temperature Magnetism and Optics Multiple Responses

Wang, Huanhuan; Yang, Shengyang; Yin, Su-Na; Chen, Li; Chen, Su

doi:10.1021/acsami.5b01436

Cited by 85 publications

(89 citation statements)

References 52 publications

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“…As previously reported, PNIPAM‐containing photonic structures involving thin films and spherical supra‐beads can respond to ambient temperatures due to the volume phase transition ability of PNIPAM gels . In our case, the as‐synthesized PC films also remain thermosensitive (Figure S6, Supporting Information).…”

Section: Resultssupporting

confidence: 82%

Highly Crystallized Brilliant Polymeric Photonic Crystals via Repulsion‐Induced Precipitation Assembly toward Multiresponsive Colorimetric Films

Tan

Wang

et al. 2016

Macro Materials & Eng

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The construction of high‐quality 3D polymeric photonic crystal (PC) films featuring fascinating tunable optical properties in a facile and time‐efficient way remains a major concern. Herein, the rapid assembly of highly crystallized brilliant flexible 3D polymeric PC films and their application for multiresponsive colorimetric sensing are demonstrated. Monochromatic PC films with remarkably distinct structural color, narrow half‐band width (27 nm), and broad tunability of band‐gaps (from blue to red) are generated within seconds from highly concentrated and charged colloids (51 vol%, −57.6 mV) embedded in poly(N‐isopropylacrylamide) matrix. A repulsion‐induced precipitation assembly is found to be responsible for the ultrafast formation of close‐packed PC colloidal arrays. Besides, the resultant PC films exhibit ultrasensitive and fast response to external stimuli, revealed by interesting droplet diffusion experiments. Thus these PC films can serve as efficient colorimetric sensing materials to visually determine diverse species including trace ionic strength (2.9 ppm), minor surfactant (1 × 10−3m), alcohol, and pH variation (1.0–13.9).

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Section: Resultssupporting

confidence: 82%

Highly Crystallized Brilliant Polymeric Photonic Crystals via Repulsion‐Induced Precipitation Assembly toward Multiresponsive Colorimetric Films

Tan

Wang

et al. 2016

Macro Materials & Eng

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“…Anisotropic colloids including Janus microspheres have been employed in displays and anisotropic, bicolored Janus microspheres have been applied as pigments in electronic paper . As an example, Janus microspheres having black and white hemispheres have been prepared via the in situ polymerization of monomer droplets including pigments, produced using a microfluidic device.…”

Section: Applications Of Nanostructured Composite Microspheresmentioning

confidence: 99%

Fabrication of Nanostructured Composite Microspheres Based on the Self‐Assembly of Polymers and Functional Nanomaterials

Yabu

2019

Part & Part Syst Charact

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Achieving the specific properties required for the applications discussed above necessitates control over the morphologies of the polymer particles as well as the precise alignment of functional nanoparticles at particle interiors and surfaces. Studies using seed polymerization and related so-called second generation particle preparation techniques have succeeded in preparing polymer microspheres having anisotropic morphologies. [10] These techniques for the synthesis of nonspherical polymer microparticles are both powerful and practical, although the particle shape has been found to be greatly affected by the preparation conditions employed. These conditions involve numerous parameters, and so controlling the particle morphology remains challenging. In addition to first and second generation particle preparation technologies employing emulsion polymerization, recent studies have demonstrated the fabrication of nanostructured microspheres based on the phase separation of polymers. [11,12] These methods can be considered as the third generation of progress in this field and allow the tuning of particle morphologies in association with phase separation theories developed during prior work with bulk polymer blends, alloys, and composites. The alignment of nanoparticles in phase separated polymer microspheres could lead to nanostructured particles with many practical applications. Figure 1 presents some of the many methods developed for the synthesis of polymer microspheres. This diagram indicates representative existing approaches used to obtain controlled particle sizes, as well as specific phases in the interior and at the surfaces of such microspheres, and can be divided into two main categories; top-down and bottom-up. These two types of procedures differ with regard to the process used to form internal and surface structures. The polymerization or crosslinking of uniformly sized oil/water (O/W) or water/oil (W/O) emulsion droplets formed by microfluidic devices is a well-known topdown fabrication technique used to produce structured polymer microspheres with sizes on the scale of tens of micrometers. [13] Taking advantage of the laminar flow inside narrow capillaries, multiple phases can be formed in the interiors of the emulsion droplets, resulting in the formation of multiphase polymer microspheres. [14] In contrast, in the case of bottom-up approaches, the phase separation of polymers is used to create internal and surface nanostructures. The latter methods have received considerable attention because they permit size control on a variety of size scales as well as morphological tuning. [15] This Review examines recent developments in the morphological control of polymer microspheres fabricated via the phase separation of polymers as well as the alignment of functional nanoparticles inside microspheres prepared by so-called bottom-up synthesis techniques. Several methods for adjusting the internal and surface morphologies of polymer microspheres based on the phase separation of polymer blends and block copoly...

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“…Perhaps the second most studied application of JPs after emulsion stabilization, and one with similar commercial potential, is their use in multicolored, switchable displays. One recent example is the synthesis of “Janus Suprabeads” (JSs) consisting of CdS quantum dots and Fe 3 O 4 nanoparticles joined by N‐isopropylacrylamide (NIPam) . The CDS quantum dots exhibit yellow fluorescence under UV light but are otherwise red.…”

Section: Applications Of Magnetic Jpsmentioning

confidence: 99%

Section: Applications Of Magnetic Jpsmentioning

confidence: 99%

Magnetic Anisotropic Particles: Toward Remotely Actuated Applications

Teo

Young

Loh

2016

Part & Part Syst Charact

100

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The latest breakthroughs in the synthetic preparation of nanomaterials have led to an expanding library of novel, complex and shape controlled structures with unique characteristics. Anisotropic Janus particles (JPs) are asymmetrical and are able to endow diverse chemical and physical characteristics with directionality within a single particle. They are typically distributed into three classes, viz polymeric, inorganic and polymeric‐inorganic and is made in a variation of morphologies including spherical, mushroom, snowman shaped, rod or cylindrical. Herein, we focus on JPs with a magnetic component, with emphasis on their fabrication, unique characteristics and recent applications.

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Janus Suprabead Displays Derived from the Modified Photonic Crystals toward Temperature Magnetism and Optics Multiple Responses

Cited by 85 publications

References 52 publications

Highly Crystallized Brilliant Polymeric Photonic Crystals via Repulsion‐Induced Precipitation Assembly toward Multiresponsive Colorimetric Films

Highly Crystallized Brilliant Polymeric Photonic Crystals via Repulsion‐Induced Precipitation Assembly toward Multiresponsive Colorimetric Films

Fabrication of Nanostructured Composite Microspheres Based on the Self‐Assembly of Polymers and Functional Nanomaterials

Magnetic Anisotropic Particles: Toward Remotely Actuated Applications

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