Optically reconfigurable chiral microspheres of self-organized helical superstructures with handedness inversion

Wang, Ling; Chen, Dong; Gutiérrez-Cuevas, Karla G.; Bisoyi, Hari Krishna; Fan, Jing; Zola, Rafael S.; Li, Guoqiang; Urbas, Augustine; Bunning, Timothy J.; Weitz, David A.; Li, Quan

doi:10.1039/c7mh00644f

Cited by 89 publications

(58 citation statements)

References 39 publications

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“…There is a report on the formation of the LC droplet using this method [11]. Moreover, the color control of a cholesteric liquid crystal droplet with photoresponsive chiral dopant was reported, and the color ranged from blue to red [12,13], and also it was demonstrated for the lasing application [14]. By encapsulating this LC droplet with a polymer core, the coloring particle was successfully developed [15].…”

Section: Methodsmentioning

confidence: 99%

Formation of Photo-Responsive Liquid Crystalline Emulsion by Using Microfluidics Device

Dogishi

Endo

Sohn

et al. 2017

Entropy

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Photo-responsive double emulsions made of liquid crystal (LC) were prepared by a microfluidic device, and the light-induced processes were studied. The phase transition was induced from the center of the topological defect for an emulsion made of (N-(4-methoxybenzylidene)-4-butylaniline (MBBA), and strange texture change was observed for an emulsion made of 4-cyano-4 -pentylbiphenyl (5CB) doped with azobenzene. The results suggest that there are defect-involved processes in the phase change of LC double emulsions.

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Section: Methodsmentioning

confidence: 99%

Formation of Photo-Responsive Liquid Crystalline Emulsion by Using Microfluidics Device

Dogishi

Endo

Sohn

et al. 2017

Entropy

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“…[100,201,[205][206][207][208][209][210][211][212] These controllable actions enable CLCs to be used in ground-breaking devices and application. This is because they possess a self-organized helical structure that can be controlled and switched by many stimuli.…”

Section: Cholesteric Lcsmentioning

confidence: 99%

Dynamic Control of Light Direction Enabled by Stimuli‐Responsive Liquid Crystal Gratings

et al. 2018

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the duality consolidation, the idea of controlling light and how it interacts with matter has always been an exciting topic. Visible light, as we perceive it, is a small portion of the electromagnetic spectrum composed of mutually perpendicular oscillating electric and magnetic fields that propagate through space and presents wave-like and particle-like behavior. Since the elements comprising matter possess dynamic electron clouds, the electromagnetic nature of light prompts different responses when it interacts with different materials, depending on its intensity, frequency, the arrangement of molecules, and so on. Whenever light interacts with matter, it might be absorbed, re-emitted, scattered, or transmitted. Although these effects are well known, the combination of them with new, innovative materials pushes optics forward. In fact, advances in optics have often occurred through the development of materials with improved optical properties, thus creating remarkable applications that tremendously influence our daily lives. These exciting applications include image processing and recording, lasing, data storage, display devices, detector systems, propulsion systems, and optical tweezers, which have enabled remote micromanipulation of colloidal particles and promising applications in various biomedical and biological applications. [1][2][3] There is, however, one component that stands out: the diffraction grating. It is generally regarded as one of the most important devices in the development of several fields of science. [4] Such importance comes from the fact that a diffraction grating is a device with a periodic structure capable of changing the propagation and splitting the spectrum The ability to control light direction with tailored precision via facile means is long-desired in science and industry. With the advances in optics, a periodic structure called diffraction grating gains prominence and renders a more flexible control over light propagation when compared to prisms. Today, diffraction gratings are common components in wavelength division multiplexing devices, monochromators, lasers, spectrometers, media storage, beam steering, and many other applications. Next-generation optical devices, however, demand nonmechanical, full and remote control, besides generating higher than 1D diffraction patterns with as few optical elements as possible. Liquid crystals (LCs) are great candidates for light control since they can form various patterns under different stimuli, including periodic structures capable of behaving as diffraction gratings. The characteristics of such gratings depend on several physical properties of the LCs such as film thickness, periodicity, and molecular orientation, all resulting from the internal constraints of the sample, and all of these are easily controllable. In this review, the authors summarize the research and development on stimuli-controllable diffraction gratings and beam steering using LCs as the active optical materials. Dynamic gratings fabricated by applying external f...

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“…LCs serve as model supramolecular systems. They have been regarded as an important class of soft materials owing to their large response to small stimuli . Moreover, they play very critical roles in living systems.…”

Section: Liquid Crystals Driven By Photothermal Effectmentioning

confidence: 99%

Soft Materials Driven by Photothermal Effect and Their Applications

Bisoyi

Urbas

2018

Advanced Optical Materials

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129

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Remote driving of functional hybrid soft materials for various applications is emerging as an enabling pursuit. Toward this end, soft materials driven by photothermal agents have been attracting tremendous attention from both fundamental science and technological applications points of view. These stimuli‐responsive materials combine the beneficial attributes of both classes of promising materials, i.e., soft materials and photothermal agents. Both inorganic and organic photothermal agents have been incorporated into the matrices of soft materials. Metal nanoparticles, carbon nanomaterials, and organic photothermal agents have been impregnated into the matrices of liquid crystals, polymers, and gels that can be remotely driven by light irradiation. In this review, the remote driving of functional hybrid soft materials and their various applications are discussed. Photothermal functional nanocomposites are demonstrated to act as actuators, therapeutic agents, drug delivery systems, microvalves, etc. Smart and adaptive systems are realized by dispersing photothermal agents into soft matter matrices. Challenges and opportunities in this fascinating frontier are outlined.

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Optically reconfigurable chiral microspheres of self-organized helical superstructures with handedness inversion

Cited by 89 publications

References 39 publications

Formation of Photo-Responsive Liquid Crystalline Emulsion by Using Microfluidics Device

Formation of Photo-Responsive Liquid Crystalline Emulsion by Using Microfluidics Device

Dynamic Control of Light Direction Enabled by Stimuli‐Responsive Liquid Crystal Gratings

Soft Materials Driven by Photothermal Effect and Their Applications

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