Explanipedia

Nutritional Availability of Methylated Selenometabolites in Gut Microbiota, Dimethyldiselenide and Dimethylselenide, in Rats Open

Kazuaki Takahashi, Sumio Iijima, Yasumitsu Ogra · 2025

Selenium (Se) is an essential micronutrient for animals. Various chemical forms of Se exist in nature, each with distinct physiological, nutritional, and toxicological properties. In this study, we aimed to determine whether dimethyldisele…

Atomic-resolution STEM-EDS studies of cation ordering in Ti-Nb oxide crystals Open

Sumio Iijima, Ichiro Ohnishi, Zheng Liu · 2021

Atomic resolution imaging of cation ordering in niobium–tungsten complex oxides Open

Sumio Iijima, Wenhui Yang, Syo Matsumura, Ichiro Ohnishi · 2021

Energy dispersive X-ray emission imaging at atomic resolution is a powerful tool to solve order–disorder problems in complex metal oxide crystals, supplementing conventional X-ray or neutron diffraction. Here, we use this method, based on …

Carbon nanohorn coating by electrodeposition accelerate bone formation on titanium implant Open

Sari Takada, Eri Hirata, Masatoshi Sakairi, Eijiro Miyako, Yuta Takano , et al. · 2021

Direct contact between bone and implant materials is required for dental implants. Titanium is used for the implant material owing to its mechanical and biological properties. The anodisation as the surface treatment was employed to enhanc…

Vertically Aligned, Small-diameter Single-walled Carbon Nanotube Growth from Ir Catalysts Open

Takahiro Maruyama, Takuya Okada, Kamal Sharma, Tomoko Suzuki, Takahiro Saida , et al. · 2020

We demonstrated that vertically aligned single-walled carbon nanotubes (VA-SWCNTs) can be grown by alcohol catalytic chemical vapor deposition (CVD) using an Ir catalyst in a cold-wall CVD system. VA-SWCNTs were directly grown on SiO2/Si s…

Time-dependent degradation of carbon nanotubes correlates with decreased reactive oxygen species generation in macrophages Open

Mengmeng Yang, Minfang Zhang, Hideaki Nakajima, Masako Yudasaka, Sumio Iijima , et al. · 2019

Mei Yang,1 Minfang Zhang,1 Hideaki Nakajima,1 Masako Yudasaka,1,2 Sumio Iijima,2 Toshiya Okazaki11Nanotube Application Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Jap…

Time-dependent degradation of carbon nanotubes correlates with decreased reactive oxygen species generation in macrophages Open

Mei Yang, Minfang Zhang, H. Nakajima, Masako Yudasaka, Sumio Iijima , et al. · 2019

Introduction and objective: With the increase in carbon nanotube-based products on the commercial market, public concern regarding the possible toxicity of these nanomaterials has attracted much attention. Although previous studies …

A Simple Method for Removal of Carbon Nanotubes from Wastewater Using Hypochlorite Open

Minfang Zhang, Yinmei Deng, Mei Yang, H. Nakajima, Masako Yudasaka , et al. · 2019

Immobilization of a carbon nanomaterial-based localized drug-release system using a bispecific material-binding peptide Open

Katsutoshi Kokubun, Sachiko Matsumura, Masako Yudasaka, Sumio Iijima, Kiyotaka Shiba · 2018

This oxSWNHs-immobilized system can be used to modify the surface of Ti in implants and be loaded with drugs that stimulate osteogenesis and bone regeneration.

Single-Walled Carbon Nanotube Synthesis By Chemical Vapor Deposition Using Platinum-Group Metal Catalysts Open

T. Maruyama, Takahio Saida, Shigeya Naritsuka, Sumio Iijima · 2018

Single-walled carbon nanotubes (SWCNTs) are generally synthesized by chemical vapor deposition (CVD) using Fe, Co, and Ni as catalysts. However, due to the Ostwald ripening of metal catalysts, the diameter distribution of the grown SWCNTs …

Hypochlorite degrades 2D graphene oxide sheets faster than 1D oxidised carbon nanotubes and nanohorns Open

Leon Newman, Neus Lozano, Minfang Zhang, Sumio Iijima, Masako Yudasaka , et al. · 2017

Electrochemical immunosensor for the determination of 8-isoprostane aging biomarker using carbon nanohorns-modified disposable electrodes Open

Esther Sánchez‐Tirado, A. González, Masako Yudasaka, Sumio Iijima, Fernando Langa , et al. · 2016

One-dimensional nanowires of pseudoboehmite (aluminum oxyhydroxide γ-AlOOH) Open

Sumio Iijima, Takashi Yumura, Zheng Liu · 2016

Significance Pseudoboehmite (PB) is a poorly crystallized variant of boehmite, but its crystal structure and morphology have not been clearly understood. In particular, PB gel crystals are formed in an aqueous solution, so the interface be…

Radiolabeling, whole-body single photon emission computed tomography/computed tomography imaging, and pharmacokinetics of carbon nanohorns in mice Open

Minfang Zhang, Dhifaf A. Jasim, Cécilia Ménard‐Moyon, António Nunes, Sumio Iijima , et al. · 2016

In this work, we report that the biodistribution and excretion of carbon nanohorns (CNHs) in mice are dependent on their size and functionalization. Small-sized CNHs (30-50 nm; S-CNHs) and large-sized CNHs (80-100 nm; L-CNHs) were chemical…

Sorption Kinetics on Open Carbon Nanohorn Aggregates: The Effect of Molecular Diameter Open

Brice Russell, Pravin Khanal, M. Mercedes Calbi, Masako Yudasaka, Sumio Iijima , et al. · 2016

We present the results of a study of the kinetics of adsorption on aggregates of open carbon nanohorns using argon and CF4 sorbates. We measured the equilibration times for each value of the sorbent loading along eight adsorption isotherms…

Carbon nanohorns allow acceleration of osteoblast differentiation<i>via</i>macrophage activation Open

Eri Hirata, Eijiro Miyako, Nobutaka Hanagata, Natsumi Ushijima, Norihito Sakaguchi , et al. · 2016

Carbon nanohorns have been used to enhance the rate of differentiaton of mesenchymal stem cells into obsteoblastsviamacrophage activation.

Room-temperature Y-type emission of perylenes by encapsulation within single-walled carbon nanotubes Open

Masayoshi Tange, Toshiya Okazaki, Zheng Liu, Kazu Suenaga, Sumio Iijima · 2016

Fluorescent materials that exhibit large Stokes shifts are useful for suppressing aggregation-caused quenching. Controlling the self-trapped exciton (STE) states in organic dyes with a dimeric structure is one way of tuning Stokes shifts. …

Ultrafast electron transfer in all-carbon-based SWCNT–C<sub>60</sub>donor–acceptor nanoensembles connected by poly(phenylene–ethynylene) spacers Open

Myriam Barrejón, Habtom B. Gobeze, María J. Gómez‐Escalonilla, J.L.G. Fierro, Minfang Zhang , et al. · 2016

Building all-carbon based functional materials for light energy harvesting applications could be a solution to tackle and reduce environmental carbon output. However, development of such all-carbon based donor-acceptor hybrids and demonstr…

Postsynthesis of h‐BN/Graphene Heterostructures Inside a STEM Open

Zheng Liu, Luiz H. G. Tizei, Yohei Sato, Yung‐Chang Lin, Chao‐Hui Yeh , et al. · 2015

Combinations of 2D materials with different physical properties can form heterostructures with modified electrical, mechanical, magnetic, and optical properties. The direct observation of a lateral heterostructure synthesis is reported by …

Synthesis, characterization and photoinduced charge separation of carbon nanohorn–oligothienylenevinylene hybrids Open

María Vizuete, María J. Gómez‐Escalonilla, Myriam Barrejón, J.L.G. Fierro, Minfang Zhang , et al. · 2015

Two new nanohybrids combining carbon nanohorns (CNHs) and oligothienylenevinylenes (nTVs) have been prepared. Light excitation of these nanohybrids induces charge-separated states.

Measurements of the transport gap in semiconducting multiwalled carbon nanotubes with varying diameter and length Open

Davie Mtsuko, Akira Koshio, Masako Yudasaka, Sumio Iijima, M. Ahlskog · 2015

Low temperature transport in multiwalled carbon nanotubes (MWNTs) has been studied at different diameters and lengths, within 2–10 nm, and 0.3–3.5μm, respectively. In a majority of the samples, semiconductivity showed up as a transport gap…

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