Article
Chemistry, Physical
Weilu Gao, Davoud Adinehloo, Xinwei Li, Ali Mojibpour, Yohei Yomogida, Atsushi Hirano, Takeshi Tanaka, Hiromichi Kataura, Ming Zheng, Vasili Perebeinos, Junichiro Kono
Summary: This study investigates the chirality-dependent electronic transport properties of single-chirality SWCNT films, revealing pronounced electronic localization phenomena and providing insights for designing and deploying macroscopic SWCNT solid-state devices. The research highlights the importance of understanding chirality-dependent behaviors in SWCNTs for various applications.
Review
Biochemistry & Molecular Biology
Shu-Yu Guo, Peng-Xiang Hou, Feng Zhang, Chang Liu, Hui-Ming Cheng
Summary: This review presents the potential of single-wall carbon nanotubes (SWCNTs) as candidate materials for flexible gas sensors. It introduces the sensing mechanism, structure parameters, design, fabrication, and performance of SWCNT-based gas sensors, and discusses the principles and possible approaches to further improve their performance.
Article
Chemistry, Multidisciplinary
Dusan Vobornik, Maohui Chen, Shan Zou, Gregory P. P. Lopinski
Summary: This study identifies two issues that can impact the accuracy of AFM measurements of single-wall carbon nanotubes' diameter. The proposed protocol effectively reduces errors associated with these issues. An analysis method is developed to minimize uncertainties in the extraction of diameters from measured images. The method is successfully applied to measure the diameter distribution of individual highly semiconducting enriched nanotubes in networks.
Article
Materials Science, Multidisciplinary
Md Ishfak Tahmid, Md Asaduz Zaman Mamun, Ahmed Zubair
Summary: This study presents an extensive investigation on the optical characteristics of SWCNTs and MWCNTs using the FDTD simulation technique, showing that absorption enhancement is achieved by changing geometrical shapes. Different shapes of CNTs exhibit varied absorption and reflectance rates at specific wavelengths and tube heights.
OPTICAL MATERIALS EXPRESS
(2021)
Article
Nanoscience & Nanotechnology
Emilio Di Ianni, Peter Moller, Tanya Cholakova, Henrik Wolff, Nicklas Raun Jacobsen, Ulla Vogel
Summary: Carbon black nanoparticles with large surface area/volume ratio may cause oxidative stress and inflammation, and the study found that surface area is correlated with inflammation while mass is correlated with genotoxicity.
Article
Chemistry, Multidisciplinary
Silvia Aidee Solorio-Rodriguez, Andrew Williams, Sarah Sos Poulsen, Kristina Bram Knudsen, Keld Alstrup Jensen, Per Axel Clausen, Pernille Hogh Danielsen, Hakan Wallin, Ulla Vogel, Sabina Halappanavar
Summary: This study aimed to determine the influence of single or multi-walled structures and surface functionalization on pulmonary toxicity of carbon nanotubes (CNTs) and to identify the underlying mechanisms. Mice were exposed to different doses of SWCNTs or MWCNTs, and inflammation and DNA damage were assessed. Transcriptomics analysis showed similar responses across all CNTs, with inflammation, cellular stress, metabolism, and DNA damage responses being affected. One pristine SWCNT was found to be the most potent and potentially fibrogenic, warranting further toxicity testing.
Review
Chemistry, Multidisciplinary
Xiaojun Wei, Shilong Li, Wenke Wang, Xiao Zhang, Weiya Zhou, Sishen Xie, Huaping Liu
Summary: Structural control of single-wall carbon nanotubes (SWCNTs) is crucial for their property modulation and functional design. Various separation techniques have been developed to achieve high-purity semiconducting/metallic SWCNTs, single-chirality species, and even their enantiomers. These advancements have promoted property modulation and development of SWCNT-based optoelectronic devices.
Article
Chemistry, Multidisciplinary
Lili Zhang, Ziwei Xu, Tian-liang Feng, Maoshuai He, Thomas Willum Hansen, Jakob Birkedal Wagner, Chang Liu, Hui-Ming Cheng
Summary: This study uses environmental transmission electron microscopy to observe for the first time the breaking of symmetry during the growth of a single-wall carbon nanotube. It reveals the role of topological defects and the importance of the tube-catalyst interface.
Article
Engineering, Electrical & Electronic
Jiri Stulik, Josef Slauf, Radek Polansky, Martin Mergl, Martin Kalbac
Summary: An ammonia gas sensor material based on sulfonic functionalized single-wall carbon nanotubes modified by poly(3,4-ethylenedioxythiophene) was prepared and its sensing performance was studied. The sensor showed excellent response to ammonia at room temperature and the ability to detect ammonia at sub-ppm concentration.
IEEE SENSORS JOURNAL
(2022)
Article
Chemistry, Physical
Xin Luo, Xiaojun Wei, Lin Liu, Zhihui Yao, Feibing Xiong, Weiya Zhou, Sishen Xie, Huaping Liu
Summary: In this work, a novel sodium hyodeoxycholate (SHC) surfactant was used for the separation of single-chirality single-wall carbon nanotubes (SWCNTs). With optimized concentrations of the SHC-based mixed surfactants, chirality-selective adsorption and desorption of SWCNTs on a gel column were achieved. Single-chirality (6,5) SWCNTs were successfully separated with a purity estimated to be 97%, surpassing most reported purities for traditional surfactant-based separations. The high-purity chirality separation demonstrated in this work lays an important foundation for the industrial production and applications of single-chirality SWCNTs.
Article
Chemistry, Multidisciplinary
Fabian L. Thiemann, Christoph Schran, Patrick Rowe, Erich A. Muller, Angelos Michaelides
Summary: This study investigates water transport in carbon nanotubes and boron nitride nanotubes using machine learning-based molecular dynamics simulations. The simulations reveal that water experiences less friction on carbon surfaces compared to boron nitride, resulting in faster water flow in carbon nanotubes. The difference in friction arises from different mechanisms, with oxygen motion playing a role in carbon nanotubes and hydrogen-nitrogen interactions in boron nitride nanotubes.
Article
Physics, Applied
Beibei Xu, Xiaojian Wu, Mijin Kim, Peng Wang, YuHuang Wang
Summary: This study experimentally observed near-infrared electroluminescence from organic color-centers intentionally introduced on single-wall carbon nanotubes aligned across a pair of gold electrodes. The electroluminescent quantum defects show potential for electrical pumping and on-chip integration, paving the way for potential applications of OCCs in display, sensor, and spin-based devices, as well as other quantum technologies.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Futian Wang, Dehua Yang, Linhai Li, Yumin Liu, Xiaojun Wei, Weiya Zhou, Hiromichi Kataura, Huaping Liu, Sishen Xie
Summary: The study systematically investigated the effect of electronic types and diameters of single-wall carbon nanotubes on their intersubband plasmons, showing that the characteristics of intersubband plasmons are dominated by the electronic states of the nanotubes. High-performance SWCNT-based near-infrared electrochromic devices were fabricated by mixing small-diameter metallic SWCNTs with semiconducting SWCNTs due to their high conductivity and negligible intersubband plasmon signals.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Fei Wang, Xiaoju Men, Haobin Chen, Feixue Mi, Mengze Xu, Xiaoxiao Men, Zhen Yuan, Pik Kwan Lo
Summary: A novel organic NIR-II conjugated polymer nanoparticles were developed for effective cancer photoacoustic imaging and photothermal therapy, showing high photothermal conversion efficiency, good photostability, and excellent biocompatibility. In vitro and in vivo tests demonstrated efficient photothermal therapy effect in ablating cancer cells and inhibiting tumor growth under laser irradiation, with rapid clearance capability and negligible systematic toxicity.
Article
Chemistry, Physical
Changping Yu, Lili Zhang, Gang Zhou, Feng Zhang, Zichu Zhang, Anping Wu, Pengxiang Hou, Huiming Cheng, Chang Liu
Summary: Carbon nanotube-based derivatives with unique structure and physicochemical properties have been extensively researched. However, the controlled growth mechanism and synthesis efficiency of these derivatives are still unclear. In this study, a defect-induced strategy was proposed for the efficient heteroepitaxial growth of SWCNTs@h-BN films. Air plasma treatment was used to generate defects on the SWCNTs' wall, and atmospheric pressure chemical vapor deposition was performed to grow h-BN on the SWCNTs' surface. Controlled experiments and first-principles calculations revealed that the induced defects on the SWCNTs' wall serve as nucleation sites for efficient heteroepitaxial growth of h-BN.
Article
Toxicology
Naohide Shinohara, Tetsuya Nakazato, Kumiko Ohkawa, Moritaka Tamura, Norihiro Kobayashi, Yasuo Morimoto, Takako Oyabu, Toshihiko Myojo, Manabu Shimada, Kazuhiro Yamamoto, Hiroaki Tao, Makoto Ema, Masato Naya, Junko Nakanishi
JOURNAL OF APPLIED TOXICOLOGY
(2016)
Article
Public, Environmental & Occupational Health
Junko Nakanishi, Yasuo Morimoto, Isamu Ogura, Norihiro Kobayashi, Masato Naya, Makoto Ema, Shigehisa Endoh, Manabu Shimada, Akira Ogami, Toshihiko Myojyo, Takako Oyabu, Masashi Gamo, Atsuo Kishimoto, Takuya Igarashi, Sosuke Hanai
Review
Toxicology
Eileen D. Kuempel, Marie-Claude Jaurand, Peter Moller, Yasuo Morimoto, Norihiro Kobayashi, Kent E. Pinkerton, Linda M. Sargent, Roel C. H. Vermeulen, Bice Fubini, Agnes B. Kane
CRITICAL REVIEWS IN TOXICOLOGY
(2017)
Review
Public, Environmental & Occupational Health
Norihiro Kobayashi, Hiroto Izumi, Yasuo Morimoto
JOURNAL OF OCCUPATIONAL HEALTH
(2017)
Review
Chemistry, Multidisciplinary
Yasuo Morimoto, Masanori Horie, Norihiro Kobayashi, Naohide Shinohara, Manabu Shimada
ACCOUNTS OF CHEMICAL RESEARCH
(2013)
Article
Ophthalmology
Makoto Ema, Akitaka Matsuda, Norihiro Kobayashi, Masato Naya, Junko Nakanishi
CUTANEOUS AND OCULAR TOXICOLOGY
(2013)
Article
Toxicology
Makoto Ema, Shoji Masumori, Norihiro Kobayashi, Masato Naya, Shigehisa Endoh, Junko Maru, Masayo Hosoi, Fuyumi Uno, Madoka Nakajima, Makoto Hayashi, Junko Nakanishi
JOURNAL OF APPLIED TOXICOLOGY
(2013)
Article
Toxicology
Makoto Ema, Tadashi Imamura, Hiroshi Suzuki, Norihiro Kobayashi, Masato Naya, Junko Nakanishi
JOURNAL OF APPLIED TOXICOLOGY
(2013)
Article
Medicine, Legal
Makoto Ema, Jin Tanaka, Norihiro Kobayashi, Masato Naya, Shigehisa Endoh, Junko Maru, Masayo Hosoi, Miho Nagai, Madoka Nakajima, Makoto Hayashi, Junko Nakanishi
REGULATORY TOXICOLOGY AND PHARMACOLOGY
(2012)
Article
Medicine, Legal
Masato Naya, Norihiro Kobayashi, Makoto Ema, Sawako Kasamoto, Masahito Fukumuro, Shigeaki Takami, Madoka Nakajima, Makoto Hayashi, Junko Nakanishi
REGULATORY TOXICOLOGY AND PHARMACOLOGY
(2012)
Article
Chemistry, Physical
Kumiko Shimizu, Reiji Kubota, Norihiro Kobayashi, Maiko Tahara, Naoki Sugimoto, Tetsuji Nishimura, Yoshiaki Ikarashi
Article
Food Science & Technology
Kumiko Shimizu, Tomoharu Sano, Reiji Kubota, Norihiro Kobayashi, Maiko Tahara, Tomoko Obama, Naoki Sugimoto, Tetsuji Nishimura, Yoshiaki Ikarashi
Article
Chemistry, Applied
Yutaka Abe, Norihiro Kobayashi, Miku Yamaguchi, Motoh Mutsuga, Asako Ozaki, Eri Kishi, Kyoko Sato
Summary: A simple and rapid analytical method was developed for the determination of formaldehyde (FA) and acetaldehyde (AA) contents in water. The study showed that the concentrations of FA and AA in PET-bottled mineral water on the Japanese market have not changed significantly over the last decade.
Article
Toxicology
Motoki Hojo, Ai Maeno, Yoshimitsu Sakamoto, Aya Ohnuki, Yukie Tada, Yukio Yamamoto, Kiyomi Ikushima, Ryota Inaba, Jin Suzuki, Yuhji Taquahashi, Satoshi Yokota, Norihiro Kobayashi, Makoto Ohnishi, Yuko Goto, Takamasa Numano, Hiroyuki Tsuda, David B. Alexander, Jun Kanno, Akihiko Hirose, Akiko Inomata, Dai Nakae
Summary: Repeated administration of MWNT-7 by intratracheal instillation over a 2-year period indicates that MWNT-7 is carcinogenic to both the lung and pleura of rats, which differs from the results of the 2 carcinogenicity tests by inhalation or intratracheal instillation.
PARTICLE AND FIBRE TOXICOLOGY
(2022)
Article
Genetics & Heredity
Katsuyoshi Horibata, Hironao Takasawa, Motoki Hojo, Yuhji Taquahashi, Miyuki Shigano, Satoshi Yokota, Norihiro Kobayashi, Kei-ichi Sugiyama, Masamitsu Honma, Shuichi Hamada
Summary: In this study, a lung micronucleus assay was developed to analyze the in vivo genotoxicity of multiwalled carbon nanotubes (MWNT-7) in different exposure scenarios. The results showed a significant increase in micronucleated cells in the cellular fraction of Clara cells and AT-II cells in both MWNT-7-treated and positive control groups. The erythrocyte micronucleus assay also detected an increase in micronucleated reticulocytes only in the positive control group.
GENES AND ENVIRONMENT
(2022)
Article
Medicine, Legal
Fiona Sewell, Ian Ragan, Graham Horgan, David Andrew, Thomas Holmes, Irene Manou, Boris P. Mueller, Tim Rowan, Barbara G. Schmitt, Marco Corvaro
Summary: There are currently three test guidelines for acute oral toxicity studies, but the subjectivity of one guideline may be hindering its wider use. In order to address this, the NC3Rs and EPAA collaborated to analyze historical data and provide recommendations on the recognition of 'evident toxicity'.
REGULATORY TOXICOLOGY AND PHARMACOLOGY
(2024)
Article
Medicine, Legal
Michael DeVito, Bas Bokkers, Majorie B. M. van Duursen, Karin van Ede, Mark Feeley, Elsa Antunes Fernandes Gaspar, Laurie Haws, Sean Kennedy, Richard E. Peterson, Ron Hoogenboom, Keiko Nohara, Kim Petersen, Cynthia Rider, Martin Rose, Stephen Safe, Dieter Schrenk, Matthew W. Wheeler, Daniele S. Wikoff, Bin Zhao, Martin van den Berg
Summary: In October 2022, the World Health Organization reevaluated the toxic equivalency factors (TEFs) for chlorinated dioxin-like compounds in a panel convened in Lisbon. This effort utilized an updated database, Bayesian dose response modeling, and meta-analysis to derive Best-Estimate TEFs. Applying these new TEFs may result in lower total toxic equivalents for dioxin-like chemicals.
REGULATORY TOXICOLOGY AND PHARMACOLOGY
(2024)