Anisotropic silica colloids for light scattering

Jacucci, Gianni; Longbottom, Brooke W.; Parkins, Christopher C.; Bon, Stefan Antonius Franciscus; Vignolini, Silvia

doi:10.1039/d1tc00072a

Cited by 18 publications

(22 citation statements)

References 39 publications

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“…Cao et al [ 259 ] showed a promising way to fabricate large‐sized nanostructures, investigating the influence of the spin coating parameters and solvent vapor annealing on the self‐assembly of multi‐geometrical ordered structure. Further, Jacucci et al [ 260 ] investigated the optimization of the morphology of the scatterer elements rather than the tunability of their refractive index, obtaining silica‐based spheroid‐cylindrical particles as colloids, thus showing a new class of pigment microsphere for ultra‐bright coatings. A vast range of geometrically variable photonic crystals (with different inter‐domain distances, sub‐100 nm) can be achieved by di‐block copolymers resulting from microphase separation (spheres, cylinders, lamellae).…”

Section: Smart and Chromogenic Responsive Materials For Adaptive Displays In Soft Roboticsmentioning

confidence: 99%

A Perspective on Cephalopods Mimicry and Bioinspired Technologies toward Proprioceptive Autonomous Soft Robots

Giordano

Carlotti

Mazzolai

2021

Adv Materials Technologies

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scientific community. [1][2][3][4][5][6][7] Regardless, every time a living being reveals novel adaptive and dynamically reactive mimicry behavior, it inspires and fosters futuristic and unexpected technological outcomes. [8][9][10][11][12] At the biological level, the visual crypsis is the ability of a species to resemble the surroundings by matching the coloration and the geometrical patterns of the habitat. In this sense, a living being can control its appearance optically (thanks to arranged and optimized structures at the mesoscopic scale, by means of pigmentation, or emissive elements) and morphologically (it can show wrinkles and textures on the body to evade detection or observation). [13][14][15][16][17][18] Both these mechanisms are characterized by a time response that ranges from milliseconds to hundreds of seconds. In nature, several species take advantage of cryptic abilities, as, e.g., in cephalopods, [7] crustaceans, [19] reptilians, [1,20,21] insects, [22,23] birds, [24,25] shells, [26,27] plants, [28,29] among many. The biotic color changing and body patterning relate to reproductive, communicative, and defensive and/or predatory strategies. Unfortunately, the nervous or central control-chain system that steers these behaviors in animals and plants, is still somehow fogged for scientists. [7,[30][31][32] A complete knowledge about their central information process systems, can open to astonishing developments in many scientific branches, from neurobiology [33,34] to quantum biology. [35] Undoubtedly, the most debated case of study in the natural world are cephalopods, which not only are highly evolved and specialized in fast adaptive color changing displays, but also are able to actuate their skin to generate 3D patterns, when exposed to specific mechanical, thermal, optical, or chemical stimuli. Soft muscular arrangements, [36][37][38] spatially distributed and expandable absorbing components (namely chromatophores), [39,40] iridescent elements (namely irido phores), [41,42] and bright white scatterers (namely leucophores) [43] are responsible for textural, postural and color changing. Moreover, octopuses are a remarkable intelligent species, able, for example, to open a jar or avoid predators in the order of seconds. [44] Thus, cephalopods are usually regarded as a perfect example of embodied intelligence, [45] thanks to the symbiosis between their body's mechanics and morphology, and the distributed sensory neuro-motor-control system. Their "learning", "mechanical" and "material intelligence" will be our lodestars along this review, resulting in a fascinating connection between Octopus skin is an amazing source of inspiration for bioinspired sensors, actuators and control solutions in soft robotics. Soft organic materials, biomacromolecules and protein ingredients in octopus skin combined with a distributed intelligence, result in adaptive displays that can control emerging optical behavior, and 3D surface textures with rough geometries, with a remarkably high control speed (≈ms). To be able ...

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Section: Smart and Chromogenic Responsive Materials For Adaptive Displays In Soft Roboticsmentioning

confidence: 99%

A Perspective on Cephalopods Mimicry and Bioinspired Technologies toward Proprioceptive Autonomous Soft Robots

Giordano

Carlotti

Mazzolai

2021

Adv Materials Technologies

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“…For instance, by controlling colloidal interactions during assembly, the internal architectures of supraparticles can be varied from those of close-packed spheres 8 to the ones of Janus-like, [9][10][11][12] core-shell, [13][14][15] or mesoporous structures. 2,[16][17][18] Thanks to the existence of a vast range of synthetic nanomaterials and assembly strategies, supraparticles have shown outstanding performance in applications including catalysis, 3,19 photonics, [20][21][22] and microrobotics. [23][24][25] In spite of these advances, producing suprastructures with multiple internal compartments remains a significant challenge.…”

Section: Introductionmentioning

confidence: 99%

Multi-compartment supracapsules made from nano-containers towards programmable release

Reichholf

Xia

et al. 2022

Mater. Horiz.

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“…Photonic balls showing opal or inverse opal structures have been made from colloidal polymers, SiO 2 and TiO 2 . [64][65][66][67][68][69][70][71][72][73] While some elegant self-assembled MOF spherical superstructures have been reported, [74][75][76] fabrication of MOF photonic balls has not been attempted so far.…”

Section: Introductionmentioning

confidence: 99%

Metal–Organic Framework Photonic Balls: Single Object Analysis for Local Thermal Probing

et al. 2021

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Due to their high porosity and chemical versatility, metal–organic frameworks (MOFs) exhibit physical properties appealing for photonic‐based applications. While several MOF photonic structures have been reported, examples of applications thereof are mainly limited to chemical sensing. Herein, the range of application of photonic MOFs is extended to local thermal and photothermal sensing by integrating them into a new architecture: MOF photonic balls. Micrometric‐sized photonic balls are made of monodispersed MOFs colloids that are self‐assembled via spray‐drying, a low‐cost, green, and high‐throughput method. The versatility of the process allows tuning the morphology and the composition of photonic balls made of several MOFs and composites with tailored optical properties. X‐ray nanotomography and environmental hyperspectral microscopy enable analysis of single objects and their evolution in controlled atmosphere and temperature. Notably, in presence of vapors, the MOF photonic balls act as local, label‐free temperature probes. Importantly, compared to other thermal probes, the temperature detection range of these materials can be adjusted “on‐demand.” As proof of concept, the photonic balls are used to determine local temperature profiles around a concentrated laser beam. More broadly, this work is expected to stimulate new research on the physical properties of photonic MOFs providing new possibilities for device fabrication.

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Anisotropic silica colloids for light scattering

Abstract: Scattering enhancers are a class of nanomaterials used in every colored or white material surrounding us: from paints and inks to food and cosmetics to packaging and paper. Such hiding...

Cited by 18 publications

References 39 publications

A Perspective on Cephalopods Mimicry and Bioinspired Technologies toward Proprioceptive Autonomous Soft Robots

A Perspective on Cephalopods Mimicry and Bioinspired Technologies toward Proprioceptive Autonomous Soft Robots

Multi-compartment supracapsules made from nano-containers towards programmable release

Metal–Organic Framework Photonic Balls: Single Object Analysis for Local Thermal Probing

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