GroEL on Quantifoil grid

Fujita, Junnosuke; Makino, Fumiaki; Asahara, Haruyasu; Moriguchi, Maiko; Kumano, S; Anzai, Itsuki; Kishikawa, Jun-ichi; Matsuura, Yoshiharu; Kato, Takayuki; Namba, Keiichi; Inoue, Tsuyoshi

doi:10.6019/empiar-11304

Cited by 3 publications

(3 citation statements)

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“…(Yb 3+ , Er 3+ ) nanoparticles using a sol-gel synthesis approach [32], Balabhadra et al synthesized both cubic and hexagonal-phase NaYF 4 : Yb 3+ /Er 3+ by co-precipitation and hydrothermal methods, respectively [33], and NaYF 4 -aerogel nanoparticle were prepared using a modified hydrothermal method by Alattar et al [34]. The co-precipitation method is mostly used by many researchers for the synthesis of nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and study of optical properties of a Gd³⁺‐doped NaYF₄ phosphor for phototherapy lamp application

Bawanthade,

Mistry,

Ugemuge

et al. 2024

Luminescence

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In recent trends, radiation falls under the narrowband ultraviolet‐B region (305–315 nm) widely used in phototherapy lamp applications in the treatment of skin diseases. In this paper, we report a Gd3+‐doped NaYF4 luminescent material synthesized for the first time using the low‐temperature co‐precipitation method. It crystallized into a face‐centred cubic structure, as confirmed by X‐ray diffraction characterization techniques and Rietveld refinement. The photoluminescence property of the as‐prepared sample shows a highly intense, sharp emission band obtained at 311 nm, which belongs to the narrowband ultraviolet‐B region and corresponds to the transition of the 6P7/2→8S7/2 level of the Gd3+ ions under 272 nm excitation (8S7/2 to 6IJ). The transitions of the Gd3+ ions are detected entirely with different concentrations of Gd3+ ions. Scanning electron microscopy analysis indicated that the average particle was 288 nm. The critical distance for energy transfer was calculated to be equal to 11.5017 Å. Dipole–dipole interaction is responsible for energy transfer, as analyzed by Dexter theory. These excellent optical characteristics, together with their highly efficient and low‐cost synthesis approach, indicate that synthesized NaYF4:Gd3+ phosphors have excessive potential for phototherapeutic lamp applications.

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Section: Introductionmentioning

confidence: 99%

Synthesis and study of optical properties of a Gd³⁺‐doped NaYF₄ phosphor for phototherapy lamp application

Bawanthade,

Mistry,

Ugemuge

et al. 2024

Luminescence

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“…Jo et al reported that K 0.28 MnO 2 •0.15H 2 O containing crystal water was used as the cathode material of PIB. Their results showed that crystal water is of considerable significance in stabilizing the crystal structure during repeated charge/discharge processes and improves the K + storage performance of the material [33]. In addition, modification strategies for constructing columnar support structures to improve electrochemical performance have been applied in lithium-based and sodium-based battery systems [34,35], providing potentially effective new ideas for the modification of layered K x MnO 2 in PIBs.…”

Section: Introductionmentioning

confidence: 99%

Layered K_0.37MnO₂·0.25H₂O as cathode material for potassium ion batteries

et al. 2023

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Lithium supply shortages have prompted the search for alternatives to widespread grid system applications. Potassium-ion batteries (PIBs) have emerged to promising candidates for this purpose. Nonetheless, the large radius of K+ (1.38 Å) impedes the march of satisfactory cathode materials. Here, we used solid-phase synthesis to prepare a layered K0.37MnO2·0.25H2O (KMO) cathode, comprising alternately connected MnO6 octahedra with a large interlayer spacing (0.64 nm) to accommodate the migration and transport of K+ ions. The cathode material achieved initial specific capacities of 102.3 and 88.1 mA h g-1 at current densities of 60 mA g-1 and 1 A g-1, respectively. The storage mechanism of K+ ions in PIBs was demonstrated ex situ using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy measurements. Overall, our proposed KMO was confirmed as an auspicious cathode material for potential use in PIBs.

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“…Recently, a model-free method based on fuzzy control was studied on MRE based vibration systems [41,42]. However, the control performance is highly dependent on the subjective design of the fuzzy membership functions.…”

Section: Introductionmentioning

confidence: 99%

Design of model-free reinforcement learning control for tunable vibration absorber system based on magnetorheological elastomer

Park¹,

Lee²,

Kim³

2021

Smart Mater. Struct.

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This paper proposes a novel model-free reinforcement learning (RL) for vibration control of a magnetorheological elastomer (MRE)-based application. Because the modeling of the MRE stiffness is nonlinear and time-varying depending on various environmental factors, this paper approached the MRE control issue via a model-free learning based method. In this study, an RL model is designed for the MRE-based tunable vibration absorber (TVA) which can control the optimal stiffness of MRE to maximize the vibration suppression. The designed RL algorithm continuously learns and updates the optimal control input of the MRE stiffness adaptively to the dynamic environment without using any prior knowledge of the MRE modeling. From analyzing the mechanism of MRE TVA, the RL algorithm and parameters are carefully designed for a high vibration performance. Also, this study proposed several ideas to make the RL model simpler and converge at a high rate. The experiments confirmed that the proposed RL model showed a rapid convergence to the optimal policy which could minimize the vibration level with respect to the dynamic excitation disturbance. Results showed that the RL model had a similar performance as the conventional tuning method and suppressed the vibration level as much as 57% compared to the one without the controller. Also, the proposed RL algorithm was able to estimate the actual dynamics of the MRE TVA by learning from the environment. Thus, this study showed the feasibility of implementing a model-free RL model to realize an adaptive controller for applications based on highly nonlinear MRE.

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GroEL on Quantifoil grid

Cited by 3 publications

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Synthesis and study of optical properties of a Gd³⁺‐doped NaYF₄ phosphor for phototherapy lamp application

Synthesis and study of optical properties of a Gd³⁺‐doped NaYF₄ phosphor for phototherapy lamp application

Layered K_0.37MnO₂·0.25H₂O as cathode material for potassium ion batteries

Design of model-free reinforcement learning control for tunable vibration absorber system based on magnetorheological elastomer

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GroEL on Quantifoil grid

Cited by 3 publications

References 0 publications

Synthesis and study of optical properties of a Gd3+‐doped NaYF4 phosphor for phototherapy lamp application

Synthesis and study of optical properties of a Gd3+‐doped NaYF4 phosphor for phototherapy lamp application

Layered K0.37MnO2·0.25H2O as cathode material for potassium ion batteries

Design of model-free reinforcement learning control for tunable vibration absorber system based on magnetorheological elastomer

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Synthesis and study of optical properties of a Gd³⁺‐doped NaYF₄ phosphor for phototherapy lamp application

Synthesis and study of optical properties of a Gd³⁺‐doped NaYF₄ phosphor for phototherapy lamp application

Layered K_0.37MnO₂·0.25H₂O as cathode material for potassium ion batteries