Electrooptics of β-FeOOH particle in aqueous media

Peikov, Viktor; Sasai, Ryo; Tanigawa, Masato; Петканчин, Ивана; Yamaoka, Kiwamu

doi:10.1016/j.jcis.2005.10.062

Cited by 4 publications

(2 citation statements)

References 27 publications

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“…with no birefringence) occurs in two steps. 41,42 As the rod volume fraction used in the experiment (f = 0.66%) is close to the binodal value and corresponds to the semidilute regime where the motion of each rod is hindered by its neighbors, this results in a decrease of the rotational diffusion compared to free rods, and D r has then the following form: 43 13 We interpret the latter behavior as a reminiscent planar anchoring of the particles on the glass substrates, which leads then to a residual nematic-like order close to the interface.…”

Section: Switching Time (On/off States)mentioning

confidence: 99%

“…the electric field. Therefore, the rotational diffusion coefficient (D r ) can be extracted from the time response τ s via τ s = 1/6D r [41,42]. As the rod volume fraction used in the experiment (φ=0.66%) is close to the binodal and corresponds to the semi-dilute regime where the motion of each rod is hindered by its neighbors, this results in a decrease of the rotational diffusion compared to free rods, and D r has then the following form [43]:…”

Section: Switching Time (On/off States)mentioning

confidence: 99%

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Electric field induced birefringence in non-aqueous dispersions of mineral nanorods

et al. 2015

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Lanthanum phosphate (LaPO4) nanorods dispersed in the non-aqueous solvent of ethylene glycol form a system exhibiting large intrinsic birefringence, high colloidal stability and the ability to self-organize into liquid crystalline phases. In order to probe the electro-optical response of these rod dispersions we study here the electric-field-induced birefringence, also called Kerr effect, for a concentrated isotropic liquid state with an in-plane a.c. sinusoidal electric field, in conditions of directly applied (electrodes in contact with the sample) or externally applied (electrodes outside the sample cell) fields. Performing an analysis of the electric polarizability of our rod-like particles in the framework of Maxwell-Wagner-O'Konski theory, we account quantitatively for the coupling between the induced steady-state birefringence and the electric field as a function of the voltage frequency for both sample geometries. The switching time of this non-aqueous transparent system has been measured, and combined with its high Kerr coefficients and its features of optically isotropic "off-state" and athermal phase behavior, this represents a promising proof-of-concept for the integration of anisotropic nanoparticle suspensions into a new generation of electro-optical devices.

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Section: Switching Time (On/off States)mentioning

confidence: 99%

Section: Switching Time (On/off States)mentioning

confidence: 99%

Electric field induced birefringence in non-aqueous dispersions of mineral nanorods

et al. 2015

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Reversing-pulse electric birefringence of multicomponent systems: The formulation and signal simulation for two axially symmetric components in equilibrium and the appearance of unusual signal patterns

Yamaoka

2007

Colloids and Surfaces B: Biointerfaces

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Biomimetic Aramid Nanofiber/β-FeOOH Composite Coating for Polypropylene Separators in Lithium–Sulfur Batteries

Kuang,

Feng,

Yang

2024

ACS Appl. Mater. Interfaces

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Aramid nanofibers (ANFs), with attractive mechanical and thermal properties, have attracted much attention as key building units for the design of high-performance composite materials. Although great progress has been made, the potential of ANFs as fibrous protein mimetics for controlling the growth of inorganic materials has not been fully revealed, which is critical for avoiding phase separation associated with typical solution blending. In this work, we show that ANFs could template the oriented growth of β-FeOOH nanowhiskers, which enables the synthesis of ANFs/β-FeOOH hybrids as composite coatings for polypropylene (PP) separators in Li–S batteries. The modified PP separator exhibits enhanced mechanical properties, heightened thermal performance, optimized electrolyte wettability, and improved ion conductivity, leading to superior electrochemical properties, including high initial specific capacity, better rate capability, and long cycling stability, which are superior to those of the commercial PP separators. Importantly, the addition of β-FeOOH to ANFs could further contribute to the suppression of lithium polysulfide shuttling by chemical immobilization, inhibition of the growth of lithium dendrites because of the intrinsic high modulus and hardness, and promotion of reaction dynamics due to the catalytic effect. We believe that our work may provide a potent biomimetic pathway for the development of advanced battery separators based on ANFs.

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Electrooptics of β-FeOOH particle in aqueous media

Cited by 4 publications

References 27 publications

Electric field induced birefringence in non-aqueous dispersions of mineral nanorods

Electric field induced birefringence in non-aqueous dispersions of mineral nanorods

Reversing-pulse electric birefringence of multicomponent systems: The formulation and signal simulation for two axially symmetric components in equilibrium and the appearance of unusual signal patterns

Biomimetic Aramid Nanofiber/β-FeOOH Composite Coating for Polypropylene Separators in Lithium–Sulfur Batteries

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