Intrinsic Temperature Dependence of Raman-Active Modes in Individual Isolated Single- and Double-Walled Carbon Nanotubes.

The intrinsic temperature dependence of Raman-active modes in carbon nanotubes (CNTs), particularly the radial breathing mode (RBM), has been a topic of a long-standing controversy. In this study, we prepared suspended individual CNTs to investigate how their Raman spectra depend on temperature and to understand the effects of environmental conditions on this dependency. We analyzed the intrinsic temperature dependence of the main Raman-active modes, including the RBM, the moiré-activated R feature, and the G-band in double-walled carbon nanotubes (DWCNT) and single-walled carbon nanotubes (SWCNTs) after complete desorption of air.

Visualizing the Submolecular Organization of αβ-Tubulin Subunits on the Microtubule Inner Surface Using Atomic Force Microscopy.

Microtubules (MTs) are dynamic cytoskeletal polymers essential for mediating fundamental cellular processes, including cell division, intracellular transport, and cell shape maintenance. Understanding the arrangement of tubulin heterodimers within MTs is key to their function. Using frequency modulation atomic force microscopy (FM-AFM) and simulations, we revealed the submolecular arrangement of α- and β-tubulin subunits on the inner MT surface.

Monovalent Ion Effect on Liquid-Liquid Phase Separation of Aqueous Polyphosphate-Salt Mixtures.

Polyphosphate (polyP) is one of the most conserved biomacromolecules and can form aggregates, such as polyP granules in bacteria, which are generated through liquid-liquid phase separation (LLPS). Studies have examined the mechanism of polyP aggregation using LLPS systems containing artificial polyP molecules as aggregation system models, where LLPS is typically induced by multivalent salts and polyelectrolytes. Although the typical concentrations of monovalent ions in living cells are approximately 100 times higher than those of divalent ions, the effects of monovalent ions on the LLPS of polyP solutions are little known.

Retraction: Glycolipid nanotube templates for the production of hydrophilic/hydrophobic and left/right-handed helical polydiacetylene nanotubes.

Retraction of 'Glycolipid nanotube templates for the production of hydrophilic/hydrophobic and left/right-handed helical polydiacetylene nanotubes' by Naohiro Kameta , , 2021, , 464-467, https://doi.org/10.1039/D0CC07387C.

Retraction: Photo-responsive hole formation in the monolayer membrane wall of a supramolecular nanotube for quick recovery of encapsulated protein.

[This retracts the article DOI: 10.1039/D2NA00035K.].

Retraction: Time-controllable roll-up onset of polythiophene sheets into nanotubes that exhibit circularly polarized luminescence.

Retraction of 'Time-controllable roll-up onset of polythiophene sheets into nanotubes that exhibit circularly polarized luminescence' by N. Kameta and T. Shimizu, , 2020, , 2999-3006, https://doi.

Retraction: Enhancement of the photocatalytic activity of rhenium(I) complexes by encapsulation in light-harvesting soft nanotubes.

Retraction of 'Enhancement of the photocatalytic activity of rhenium(I) complexes by encapsulation in light-harvesting soft nanotubes' by Naohiro Kameta , , 2017, , 10116-10119, https://doi.org/10.1039/C7CC05337A.

Retraction: Stacking of nanorings to generate nanotubes for acceleration of protein refolding.

Retraction of 'Stacking of nanorings to generate nanotubes for acceleration of protein refolding' by N. Kameta and D. Wing, , 2021, , 1629-1638, https://doi.

Retraction: PEG-nanotube liquid crystals as templates for construction of surfactant-free gold nanorods.

Retraction of 'PEG-nanotube liquid crystals as templates for construction of surfactant-free gold nanorods' by Naohiro Kameta and Hidenobu Shiroishi, , 2018, , 4665-4668, https://doi.org/10.1039/C8CC02013B.

Graphene Bilayer as a Template for Manufacturing Novel Encapsulated 2D Materials.

Bilayer graphene (BLG) has recently been used as a tool to stabilize encapsulated single sheets of various layered materials and tune their properties. It was also discovered that the protecting action of graphene sheets makes it possible to synthesize completely new two-dimensional materials (2DMs) inside the BLG by intercalating various atoms and molecules. In comparison to the bulk graphite, BLG allows for easier intercalation and a much larger increase in the interlayer separation of the sheets.

Direct Measurement of the Diffusion Coefficient of Adhesives from Moisture Distribution in Adhesive Layers Using Near-Infrared Spectroscopy.

In this study, we used near-infrared spectroscopy to measure the moisture penetration in epoxy adhesives and investigated the difference in the diffusion coefficients between the bulk and the adhesive layer. Moisture diffusion was evaluated under 100% RH and water immersion conditions. First, the effects of the curing agents and additives on moisture diffusion in the bulk were gravimetrically evaluated using epoxy-coated quartz glass plates.

prediction of gigantic anomalous Nernst effect in ferromagnetic monolayer transition metal trihalides.

The anomalous Hall conductivity of all transition metal trihalides was explored using first-principles calculations. Employing the Fukui-Hatsugai-Suzuki method, we found that ferromagnetic monolayersBr(= Pd, Pt) possessed the quantized anomalous Hall conductivity (QAHC) with and without carrier doping. Due to unique QAHC, their transverse thermoelectric properties ofBr(= Pd, Pt) were investigated.

Calcium-mediated zoledronate loading onto carbon nanohorns.

Previously, we showed that the anti-osteoclast effect of zoledronate (ZOL), a type of bisphosphonate, is enhanced when it is used as a nanocomposite comprising ZOL, an "oxidized single-walled carbon nanohorn (OxCNH) with a spherical shape" and calcium phosphate (CaP). This nanocomposite, termed , is a potential therapeutic agent for patients with bone fragility associated with metastatic bone cancer. Because contains by-products that comprise CaP-ZOL nanocomposites, the aim of this study was to prepare more sophisticated nanocomposites lacking such by-products; it was achieved by reducing the availability of calcium and phosphate ions during the preparation process.

Relationship Between Cryoprotectant Potential and Protein Hydration in Aqueous Zwitterionic Solutions.

The cryoprotectant potential of 3-(1-(2-(2-methoxyethoxy)ethyl)imidazol-3-io)butane-1-carboxylate (OEimCC) for proteins necessitates assessment to elucidate its relationship with protein hydration. To reveal this relationship, we assessed the protein stability (pre-freezing and post-thawing) and melting behavior in dilute aqueous protein-OEimCC solutions containing varying mole fractions (x) of OEimCC (x = 0, 7.7 × 10, and 1.

Quantitative evaluation of particle-binder interactions in ceramic slurries via differential centrifugal sedimentation.

In diverse materials science spanning from fine ceramics to lithium-ion batteries and fuel cells, the particle-binder interactions in slurries play a crucial role in governing the ultimate performance. Despite numerous efforts to date, quantitatively elucidating these hidden interactions has remained a longstanding challenge. Here, we demonstrate a dynamic approach to evaluate adsorptive interactions between ceramic particles and polymeric binders entangled in a slurry utilizing differential centrifugal sedimentation (DCS).

Improving the Long-Term Stability of PbTe-Based Thermoelectric Modules: From Nanostructures to Packaged Module Architecture.

Nanostructured lead telluride PbTe is among the best-performing thermoelectric materials, for both p- and n-types, for intermediate temperature applications. However, the fabrication of power-generating modules based on nanostructured PbTe still faces challenges related to the stability of the materials, especially nanoprecipitates, and the bonding of electric contacts. In this study, in situ high-temperature transmission electron microscopy observation confirmed the stability of nanoprecipitates in p-type PbNaGeTe up to at least ∼786 K.

Superatomic Layer of Cubic MoS Clusters Connected by Cl Cross-Linking.

Superatomic clusters - assemblies of atoms with various sizes, shapes, and compositions - can form hierarchical architectures that exhibit emergent electronic properties not found in their individual units. In particular, cubic MX clusters of chalcogenides (M = transition metal; X = chalcogen) are recognized as versatile building blocks for 3D structures with tunable morphologies and electronic properties. However, tetrahedral MX clusters rarely assemble into 2D architectures, which could offer a distinct class of functional materials from their 3D analogues.

Phosphate-type zwitterionic liquid.

The imidazolium/phosphate zwitterionic liquid synthesised in this study dissolved cellulose and satisfies all other properties required for efficient cellulosic bioethanol production such as liquid at room temperature and low toxicity.

Highly selective methanol adsorption from dilute aqueous solutions using Mn[Fe(CN)]: a Prussian blue analog.

Mn[Fe(CN)] (MnHCF) selectively adsorbs methanol from water with a distribution coefficient of 11 mL g, which is 3-11 times that of activated carbons and zeolites. MnHCF exhibits an adsorption capacity of 0.36 mmol g and can adsorb 1000 mg MeOH per L in aqueous solution, demonstrating its effectiveness for treating methanol-contaminated wastewater.

Vesicles exhibit high-performance removal of per-and polyfluoroalkyl substances (PFAS) depending on their hydrophobic groups.

The removal of per- and polyfluoroalkyl substances (PFAS) from drinking water is urgently needed. Here, we demonstrated high performance of vesicles on PFAS adsorption. Vesicles used in this study were enclosed amphiphile bilayers keeping their hydrophobic groups inside and their hydrophilic groups outside in water.

Tungsten-Doped ZnO as an Electron Transport Layer for Perovskite Solar Cells: Enhancing Efficiency and Stability.

This study delves into enhancing the efficiency and stability of perovskite solar cells (PSCs) by optimizing the surface morphologies and optoelectronic properties of the electron transport layer (ETL) using tungsten (W) doping in zinc oxide (ZnO). Through a unique green synthesis process and spin-coating technique, W-doped ZnO films were prepared, exhibiting improved electrical conductivity and reduced interface defects between the ETL and perovskite layers, thus facilitating efficient electron transfer at the interface. High-quality PSCs with superior ETL demonstrated a substantial 30% increase in power conversion efficiency (PCE) compared to those employing pristine ZnO ETL.