Article
Materials Science, Composites
Yanling Chen, Qin Yao, Sanyin Qu, Wei Shi, Hui Li, Lidong Chen
Summary: In this study, metal Phthalocyanine complex hybrids with single-walled carbon nanotubes were prepared and their thermoelectric properties were investigated. The electrical conductivity of the hybrids increased significantly with higher SWCNT content, surpassing values predicted by the mixture rule. NiPc/SWCNT hybrids exhibited the highest electrical conductivity, with the lowest interface energy barrier contributing to this enhancement.
COMPOSITES COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
Guandong Cui, Zhi Xu, Han Li, Shuchen Zhang, Luping Xu, Alessandro Siria, Ming Ma
Summary: Investigation on the response and performance of individual carbon nanotubes under osmotic forcing is lacking. In this study, we measure the osmotic energy conversion for individual double-walled carbon nanotubes and find a giant power density and slip length. Our results suggest that carbon nanotubes are a good candidate for ultrafast transport and osmotic power harvesting under salinity gradients.
NATURE COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Mohamadreza Keyghobadi-moghaddam, Tayebeh Movlarooy
Summary: The structural, stability, and electronic properties of double-walled GaN nanotubes were investigated using density functional theory. The best favorable nanotubes were found to have chirality differences of 7 and 8, and interlayer spacing of about 6.4 and 4.2 angstroms, respectively. Furthermore, it was discovered that double-walled GaN nanotubes have a narrower bandgap compared to single-walled nanotubes.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Ye Wang, Ya-Nan Gao, Tian-Ning Yue, Xu-Dong Chen, Ming Wang
Summary: In this study, multi-walled carbon nanotube-filled polydimethylsiloxane (CNT/PDMS) composites with high-performance and tunable microwave shielding were prepared by incorporating liquid metals (LMs). The composites exhibited high absorption loss and low reflection loss, effectively reducing secondary microwave pollution. The microwave shielding performance of the composites containing LMs could be regulated by compression.
APPLIED SURFACE SCIENCE
(2021)
Article
Multidisciplinary Sciences
Grigorii Skorupskii, Geraldine Chanteux, Khoa N. Le, Ivo Stassen, Christopher H. Hendon, Mircea Dinca
Summary: Metal-organic frameworks (MOFs) are hybrid materials with high surface areas but generally poor electrical conductivity. Recent research has shown that MOFs with high electrical conductivity have potential applications in energy storage and catalysis. However, there is limited understanding of the role of metal ions in these conductive MOFs.
ANNALS OF THE NEW YORK ACADEMY OF SCIENCES
(2022)
Article
Multidisciplinary Sciences
Haoran Qu, Archith Rayabharam, Xiaojian Wu, Peng Wang, Yunfeng Li, Jeffrey Fagan, Narayana R. Aluru, YuHuang Wang
Summary: Research has shown that single-wall carbon nanotubes can separate n-hexane from cyclohexane through nanopores, despite the fact that the kinetic diameters of these molecules are larger than the pore size. Simulations and experiments have revealed that n-hexane molecules can stretch inside the nanotube pores, challenging current understanding of nanopore selectivity.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Sadegh Nikbakhtian, Tayebeh Movlarooy
Summary: The structural, stability, and electronic properties of double-walled GaAs nanotubes (DWGaAsNTs) were investigated using density functional theory (DFT) and the SIESTA code with Van der Waals corrections. It was found that DWGaAsNTs with differential chirality of 5, (m,m)@(m + 5,m + 5) and 8, (m,0)@(m + 8,0) and inter-layer space of roughly 5.4 and 4.9 Å are the most favorable. All DWGaAsNTs are direct bandgap semiconductors based on the electronic band structure. Additionally, the band gap increases with increasing wall spacing and tube diameter, and the trend is almost constant at larger distances between walls. The double-walled GaAs nanotubes have a narrower bandgap compared to single-walled nanotubes. The implications of this research can be useful for future empirical studies.
INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
M. Amir Bazrafshan, Farhad Khoeini
Summary: The transport properties of S-shaped graphene structures with different vacancies were studied, and it was found that double vacancies have the best figure of merit. The physical properties of the system can be controlled by adjusting parameters, and lengthening the structure can reduce phononic contribution. Single vacancies are better at distinguishing between electronic thermal conductance and electronic conductance. Vacancy engineering can significantly improve thermoelectric performance.
SCIENTIFIC REPORTS
(2022)
Article
Materials Science, Multidisciplinary
Zakaria Saadi, Simon G. King, Jose Anguita, Vlad Stolojan, S. Ravi P. Silva
Summary: Thermoelectric materials offer a promising solution for recovering wasted energy, but their efficiency is low and the best materials are brittle, toxic, and expensive. This study demonstrates that flexible films of double-walled carbon nanotubes can achieve low thermal conductivity and high electrical conductivity, leading to the development of flexible, cheaper, and more efficient thermoelectric generators.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Chemistry, Physical
Ayse Nihan Basmaci
Summary: This study investigates the behaviors of electromagnetic wave propagation in a double-walled carbon nanotube, discussing the effects of material property parameters and the interaction between the inner and outer tubes. Nonlocal effects of the DWCNT on electromagnetic wave propagation and the specific frequencies of propagation are examined, with results showing convergence of frequencies at higher wavenumbers and decreasing frequencies with increasing nonlocal and material parameters.
Article
Chemistry, Multidisciplinary
Jun Gao, Yaxin Jiang, Sibo Chen, Hongjie Yue, He Ren, Zhenxing Zhu, Fei Wei
Summary: This study demonstrates that molecular evolution is a characteristic of the preparation of ultralong carbon nanotubes, where chiral assembly is achieved through template auto-catalysis growth, and environmental factors affect the evolutionary growth.
Article
Chemistry, Multidisciplinary
Georgy Gordeev, Soren Wasserroth, Han Li, Benjamin Flavel, Stephanie Reich
Summary: The study demonstrates the impact of moire patterns on the vibrational properties of double-walled carbon nanotubes and validates their influence on optical transition energies. Shifts in the radial breathing mode and optical transition energies were observed, providing a method for future experimental assignments.
Article
Nanoscience & Nanotechnology
Jake Dudley Mehew, Marina Y. Timmermans, David Saleta Reig, Stefanie Sergeant, Marianna Sledzinska, Emigdio Chavez-Angel, Emily Gallagher, Clivia M. Sotomayor Torres, Cedric Huyghebaert, Klaas-Jan Tielrooij
Summary: Nanomaterials, particularly carbon nanotubes (CNTs), are promising candidates for applications requiring high thermal conductivity. In this study, the thermal conductivity of free-standing double-walled CNT films was measured using all-optical Raman thermometry, showing significantly enhanced thermal conduction compared to single-walled CNT films. This research contributes to a better understanding of these nanomaterials and their suitability for extreme ultraviolet (EUV) lithography.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Bin-Hao Chen
Summary: The adsorption properties of hydrogen molecules in twisted double-walled carbon nanotubes were investigated, and it was found that the amount of stored hydrogen and the kinetic diameter of hydrogen molecules are influenced by the degree of twisting. Additionally, the adsorption heat was found to depend on the extent of twisting.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Samuel E. Clark, Andrew W. Heard, Charlie T. McTernan, Tanya K. Ronson, Barbara Rossi, Petr Rozhin, Silvia Marchesan, Jonathan R. Nitschke
Summary: A double-walled tetrahedral metal-organic cage was assembled in solution using silver(I), 2-formyl-1,8-naphthyridine, halide, and a threefold-symmetric triamine. The cage has an inner set of tetrahedron walls that are surrounded by the outer four, with significant interior volume for binding anionic guests. External binding clefts located at the edges of the cage can bind small aromatic guests. The exchange of halide ions on the silver clusters allows for modulation of the cavity volume, enabling targeted binding behavior.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Materials Science, Composites
Khaoula Bouzidi, Didier Chaussy, Alessandro Gandini, Emmanuel Flahaut, Roberta Bongiovanni, Davide Beneventi
Summary: A new ink formulation utilizing a fully bio-based thermosetting resin, cellulose powders, and carbon nanotubes was developed for additive manufacturing by direct ink writing. Electrical and rheological characterization helped determine optimal processing conditions and printability window. The study's results open possibilities for integrating conductive circuits in 3D-printed structures or printing bulk semi-conductive complex structures using low-cost DIW 3D printing and renewable raw materials.
COMPOSITES SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Physical
Dmitry Levshov, Marina Avramenko, Maksiem Erkens, Huy-Nam Tran, Thi Thanh Cao, Van Chuc Nguyen, Emmanuel Flahaut, Valentin N. Popov, Ahmed-Azmi Zahab, Jean-Louis Sauvajol, Raul Arenal, Wim Wenseleers, Sofie Cambre, Matthieu Paillet
Summary: Measuring electronic Raman scattering (ERS) has become a efficient method for structural characterization of metallic single-wall carbon nanotubes (SWCNT), but its application to other types of SWCNT-based structures, such as double-wall carbon nanotubes (DWCNT), is not well studied. In this work, the authors combine electron diffraction, Rayleigh and Raman spectroscopies to investigate the ERS process in 21 individual DWCNTs with different electronic configurations. They observe partial suppression of ERS intensity in DWCNTs compared to SWCNTs, mainly due to dielectric screening of Coulomb interactions. Based on their experimental findings, the authors propose an adapted method for structural identification of DWCNT samples from ERS data, which can be applied to characterize emerging 1D VDW heterostructures based on metallic SWCNTs.
Article
Chemistry, Analytical
Mariana Sendova, Jose A. Jimenez
Summary: A comprehensive analysis was conducted on glass containing Eu2O3 and Dy2O3, or Eu2O3, Dy2O3, and CuO melted with nanodiamond powder. The analysis included measurements of optical absorption, photoluminescence emission and excitation spectra, and colorimetry. The study found that nanodiamond facilitated the stabilization of blue-emitting Cu+ and Eu2+ ions, along with yellow-emitting Dy3+ and red-emitting Eu3+ ions, resulting in white light-emitting glass. The proposed analysis methods provide helpful tools for understanding and designing materials for tunable white light-emitting devices.
Article
Environmental Sciences
Lauris Evariste, Florence Mouchet, Eric Pinelli, Emmanuel Flahaut, Laury Gauthier, Maialen Barret
Summary: Graphene-based nanomaterials like graphene oxide (GO) have unique properties and high technological application potential. GO is likely to be released into aquatic ecosystems, so it is important to evaluate its ecotoxicological potential. Previous studies have shown that GO exposure inhibited the growth of X. laevis tadpoles and caused metabolic and genotoxic effects. This study investigates the potential link between gut microbial communities and host physiological alterations in response to GO exposure. The results suggest that the gut microbiota could be a target for ecotoxicological studies as changes in its structure and function may lead to host fitness loss.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Plant Sciences
Manisha Mahanta, Saikat Gantait, Epsita Mukherjee, Somnath Bhattacharyya
Summary: This study reports the in vitro mass propagation of Gerbera jamesonii Bolus ex Hooker f., a highly demanded cut-flower in the floriculture industry, induced by meta-Topolin (mT). The subsequent acclimatization process and cyto-genetic fidelity assessment of the plantlets were also carried out. Different cytokinins and cytokinin-like plant growth regulators were supplemented in the basal Murashige and Skoog (MS) medium, and the growth performance of the shoot tip explants was compared. The developed protocol for large-scale production of true-to-type planting materials of gerbera is of great commercial importance.
SOUTH AFRICAN JOURNAL OF BOTANY
(2023)
Review
Materials Science, Biomaterials
Georgios Kougkolos, Muriel Golzio, Lionel Laudebat, Zarel Valdez-Nava, Emmanuel Flahaut
Summary: Hydrogels are soft 3D materials composed of cross-linked hydrophilic polymer chains, which have extensive applications in biomedicine due to their similarity to native tissue, biocompatibility, and tunability. However, hydrogels are usually poor conductors of electric current because of the insulating nature of commonly-used hydrophilic polymer chains. To meet the requirements of certain biomedical applications, the electrical conductivity of hydrogels needs to be improved. The incorporation of conductive nanomaterials in hydrogels enables the combination of electrical conductivity with the soft nature, flexibility, and high water content of hydrogels.
JOURNAL OF MATERIALS CHEMISTRY B
(2023)
Article
Chemistry, Multidisciplinary
A. Badon, J. -B Marceau, C. Allard, F. Fossard, A. Loiseau, L. Cognet, E. Flahaut, G. Recher, N. Izard, R. Martel, E. Gaufres
Summary: By confining alpha-sexithiophene (6T) molecules in boron nitride nanotubes (6T@BNNTs), fluorescence anisotropy can be induced in a transparent host. The experiments show that individual 6T@BNNTs exhibit high polarization extinction ratio at room temperature, and the fluorescence anisotropy is consistent with the alignment of encapsulated 6T molecules along the nanotube axis. By stretching a flexible transparent polymer film mixed with 6T@BNNTs, macroscopic fluorescence anisotropy can be induced within the film. This work demonstrates the use of dyes@BNNT system as a convenient platform to induce fluorescence anisotropy in photonic materials.
MATERIALS HORIZONS
(2023)
Article
Environmental Sciences
M. Connolly, G. Moles, F. Candotto Carniel, M. Tretiach, G. Caorsi, E. Flahaut, B. Soula, E. Pinelli, L. Gauthier, F. Mouchet, J. M. Navas
Summary: Tests using algae and/or cyanobacteria, invertebrates (crustaceans) and fish are crucial for assessing the ecotoxicity of substances and classifying them as hazardous or not to the aquatic environment. However, testing two dimensional (2D) graphene nanoforms requires additional attention and adaptations due to their unique attributes. This review critically analyzes existing studies and approaches to testing, providing important insights for future assessments and regulatory requirements.
Review
Chemistry, Physical
Mathieu Leroy, Emmanuel Flahaut, Camille Larue
Summary: The use of carbon based nanomaterials (CNMs) in various sectors is increasing, leading to their inevitable release into the environment. Terrestrial ecosystems, especially agrosystems, are considered major sinks for CNMs due to their accumulation in sewage sludge used for crop production. This study raises questions about the current risk assessment paradigm regarding the additive effects of a cocktail of contaminants and explores strategies to ensure food safety.
Article
Materials Science, Multidisciplinary
Mauricio Pavia, Melanie Emo, Fahad Alnjiman, Enrico Andreoli, Jean-Francois Pierson, Emmanuel Flahaut, Ewa Kazimierska, Brigitte Vigolo
Summary: This work explores a novel approach to disperse purified double-walled carbon nanotubes in high ionic strength aqueous media, i.e. a copper ion solution, to further prepare double-walled carbon nanotubes/Cu composites by co-electrodeposition. The capability of different surfactants to disperse the carbon nanotubes in the copper ion solution is analyzed, and Pluronic-P123 shows the best dispersive level. The dispersion mechanism suggests that the hydrophobic nature of Pluronic-P123 promotes efficient steric repulsions, enabling stable dispersion in the copper electrolyte.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Valentina Castagnola, Lieselot Deleye, Alice Podesta, Edra Jaho, Fabrizio Loiacono, Doriana Debellis, Martina Trevisani, Dinu Zinovie Ciobanu, Andrea Armirotti, Francesco Pisani, Emmanuel Flahaut, Ester Vazquez, Mattia Bramini, Fabrizia Cesca, Fabio Benfenati
Summary: Due to their biocompatibility and high cargo capability, graphene-based materials are considered as an ideal brain delivery system. In this study, we used two in vitro models to investigate the interactions between graphene oxide and few-layer graphene with the blood-brain barrier. Our results show that the two graphene materials have good biocompatibility and do not significantly affect the integrity and functionality of the barrier, but their translocation across the barrier is rare.
Article
Chemistry, Multidisciplinary
Ruben Acevedo, Brigitte Soula, Anne Marie Galibert, Emmanuel Flahaut
Summary: Oxidized carbon nanotubes were filled with an aqueous solution of nano-energetic materials using a simple impregnation method. The study compared different energetic materials, with a focus on an inorganic compound belonging to the Werner complexes. The research showed a significant increase in released energy upon heating, which was attributed to the confinement of the nano-energetic material either by filling the inner channel of carbon nanotubes or insertion in the triangular channels between adjacent nanotubes when they form bundles.
Article
Chemistry, Multidisciplinary
Petr Rozhin, Slavko Kralj, Brigitte Soula, Silvia Marchesan, Emmanuel Flahaut
Summary: Supramolecular hydrogels formed from simple peptides can be improved by the addition of carbon nanomaterials, although their interaction with the peptide structure needs to be investigated. This study compares the performance of single-walled and double-walled carbon nanotubes as additives for a tripeptide hydrogel, with the latter showing superior results. Various spectroscopic techniques, thermogravimetric analysis, microscopy, and rheology data provide detailed insights into the structure and behavior of these nanocomposite hydrogels.
Article
Agricultural Engineering
Saroj Laha, Tsama Subrahmanyeswari, Sandeep Kumar Verma, Suchita N. Kamble, Sudhir Singh, Somnath Bhattacharyya, Saikat Gantait
Summary: In this study, a simple and eco-friendly method for synthesizing silver nanoparticles (AgNPs) using leaf extract of in vitro banana plantlets was established. The synthesized AgNPs were characterized and then used to study their effects on the growth and rebaudioside-A content of stevia under in vitro conditions. The results showed that 400 μM AgNPs concentration in 'semi-solid followed by liquid' medium exhibited the best growth response and highest rebaudioside-A production.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Biochemistry & Molecular Biology
Venkateswara Rao Sodisetti, Andreas Lemmerer, Daniel Wamwangi, Somnath Bhattacharyya
Summary: A one-step chemical approach was used to synthesize lanthanide-EDTA chelates and graft them onto MWCNT surfaces, resulting in high magnetic bistability retention. The study showed that different Ln-CNT hybrid molecular systems displayed distinct magnetic behaviors, indicating the importance of selecting lanthanide ions for designing multi-functional SMM-CNT hybrids.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
