Article
Chemistry, Multidisciplinary
Yundong Pu, Sen Yang, Meng Qi, Kuang Sheng, Junfeng Bi, Fukun Fan, Xiaoya Yuan
Summary: In this study, the effect of hybrid GO/HO-G on cement composites was investigated. The results showed that the combination of GO and HO-G led to a better improvement in the strength and durability of mortar compared to using GO or HO-G alone.
Article
Materials Science, Composites
Lichao Gu, Hao Nan, Ruiguang Xing, Gaofei Pan, Yufei Wang, Xin Ge
Summary: This study systematically investigates the effects of different geometries of nanofillers, including BNNS, CNT, and BNNS-CNT hybrid, on the performance of SBR nanocomposites. The results show that the nanofillers significantly enhance the mechanical and thermal properties of the nanocomposites.
POLYMER COMPOSITES
(2023)
Article
Chemistry, Multidisciplinary
Yaru Guo, Shuai Ding, Changshuai Shang, Chenguang Zhang, Menggang Li, Qinghua Zhang, Lin Gu, Boon Chin Heng, Shihan Zhang, Feng Mei, Ying Huang, Xuehui Zhang, Mingming Xu, Jiuhui Jiang, Shaojun Guo, Xuliang Deng, Lili Chen
Summary: A new class of multifunctional PtCuTe nanosheets with strong ROS scavenging and ROS-independent antibacterial properties is reported. It promotes endothelial tip cell formation, enhances vascular tube formation, stimulates macrophage polarization toward M2 phenotype, and improves fibroblast mobility, remarkably superior to the traditional PtCu nanoenzyme. Consequently, PtCuTe application accelerates diabetic wound healing at a rate not reported before.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Erfan Zal Nezhad, Xiang Qu, Farayi Musharavati, Fadi Jaber, Mark R. Appleford, S. Bae, Kaan Uzun, Morgan Struthers, Muhammad E. H. Chowdhury, Amith Khandakar
Summary: In this study, hydroxyapatite/titanium nanotube/carbon nanotube (HA/TNT/CNT) nanocomposites with different CNT contents were fabricated and their mechanical properties, biocompatibility, and tribological characteristics were investigated. The results showed that HA/TNT/CNT with higher CNT content exhibited improved mechanical properties and reduced wear debris volume, with no cytotoxicity in in-vitro biocompatibility tests.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Shunwei Chen, Yuhang Jiang, Shangke Jia, Hao Liu, Guangwei Zhang, Xiujun Han, Ruiqin Zhang
Summary: The study reveals that phenine nanotubes (pNTs) exhibit different semiconductor properties compared to single-walled carbon nanotubes (SWCNTs), with spatial separation in the HOMO and LUMO due to periodic structural vacancies. Chemical modifications such as hydrogenation greatly broaden the light absorption/emission range, while diameter variation has negligible influence on property tuning. Low-dose hydrogenation is predicted to be an effective strategy for enhancing luminescence.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Mathematics
Baotao Chi, Shengmin Bai, Qianjian Guo, Yaoming Zhang, Wei Yuan, Can Li
Summary: The present paper provides a new definition of the dual interpolation curve using adaptive curve refinement techniques. The dual interpolation curve is a curve modeling scheme that utilizes polynomial segments of varying degrees. It maintains desirable properties of conventional curve modeling methods and is particularly useful for solving geometry defeaturing problems in computer-aided technology. The proposed approach combines Lagrange interpolation polynomial and meshless method to characterize non-smooth boundaries for geometry defeaturing.
Article
Chemistry, Multidisciplinary
Yi Kai Cheng, Benoit Denis Louis Campeon, Seiji Obata, Yuta Nishina
Summary: The addition of two-dimensional materials, such as graphene oxide and hexagonal boron nitride, into polymers can significantly enhance their mechanical properties. However, there has been no previous report on the effect of using both types of nanoplatelets simultaneously. In this study, polyimide films containing amine-functionalized hexagonal boron nitride and graphene oxide were fabricated, and it was found that the critical ratio and content of these nanoplatelets within the films significantly influenced their mechanical properties. An optimal weight ratio and content of the nanoplatelets resulted in a significant increase in the tensile modulus and strength of the films.
NANOSCALE ADVANCES
(2022)
Article
Materials Science, Multidisciplinary
Adnan I. Khdair, A. Ibrahim
Summary: This paper investigates the mechanical and tribological properties of Cu-graphene nanosheets (GN) nanocomposites and presents a method to avoid reaction between Cu and C. Results show that the addition of GNs significantly improves the properties of Cu nanocomposites, but careful consideration should be given to the amount of GNs added. The optimum GN content is determined to be 0.5vol%, leading to improved hardness, wear rate, and coefficient of friction.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Review
Chemistry, Physical
Susmi Anna Thomas, Jayesh Cherusseri
Summary: BCN is a new-generation ultrathin two-dimensional nanomaterial with unique properties, which has applications in catalysis, electrochemical energy storage, and energy generation. Supercapacitors, as high-power electrochemical energy storage systems, have wide applications in electric vehicles and smart grids. This review summarizes the recent developments on supercapacitors based on electrode-active materials prepared from ultrathin layered 2D BCN-based nanostructures, including synthesis methods, properties, and future outlook.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Agronomy
Daipeng Lu, Wei Wang, Encai Bao, Shilin Wang, Xue Wu, Zongchun Bai, Yuxin Tang
Summary: This study investigated the cutting device used in the seedling grafting process and determined the optimal combination of structural and working parameters. The study found that the sliding angle and cutting edge angle affect the cutting stress, while the cutting speed and cutter clearance affect the cutting force. Experimental results showed that the simulated values matched well with the experimental data.
Article
Nanoscience & Nanotechnology
Weimin Xie, Xiaozheng Liang, Hao Wang, Xiaoguang Zhao, Yili Tang, Mingjie Wu, Huaming Yang
Summary: In this study, a novel and efficient strategy to synthesize nanocellulose/clay/sodium alginate (CRS) macrofibers with high strength, great toughness, and flame retardancy was reported. The anisotropic structure of the fibers, achieved by arranging and orienting nanoclay, resulted in excellent mechanical and thermal functional properties. This facile and high-efficiency strategy has the potential for scalable manufacturing of high-strength, super tough, and flame-retardant fibers.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Nataliya A. Sakharova, Andre F. G. Pereira, Jorge M. Antunes, Bruno M. Chaparro, Jose V. Fernandes
Summary: This study numerically evaluates the elastic properties of InN nanosheets and nanotubes using the nanoscale continuum modelling approach. The obtained results serve as a solid foundation for further investigations into the mechanical behavior of InN nanostructures.
Review
Materials Science, Multidisciplinary
Victor Morales-Florez, Arturo Dominguez-Rodriguez
Summary: This review article provides a comprehensive overview and discussion on the fabrication methods and mechanical properties improvement of ceramic matrix composites using different carbon allotropes as reinforcements. Although significant improvements have been achieved, there are still some critical issues that need to be addressed in order to fully exploit the potential of this reinforcement strategy.
PROGRESS IN MATERIALS SCIENCE
(2022)
Article
Engineering, Mechanical
Bruno Faria, Nuno Silvestre
Summary: Phenine Nanotubes (PhNT) have lower mechanical properties compared to carbon nanotubes (CNTs), but they offer advantages in terms of higher tensile strain endurance and flexible sidewalls due to superior porosity.
EXTREME MECHANICS LETTERS
(2022)
Article
Computer Science, Information Systems
Bolin Wang, Wenling Wu
Summary: The Internet of Things (IoT) technology simplifies and enhances our lives by interacting with sensors and devices globally and using the collected smart data. However, IoT devices are susceptible to cyberattacks due to their resource-constrained architecture. The emergence of lightweight cryptography offers a solution for IoT challenges. As the amount of data in IoT devices is expected to grow rapidly with the promotion of 5G technology, the design and analysis of lightweight block ciphers becomes crucial. MANTIS, a tweakable block cipher, is suitable for IoT with its goal of low-latency implementations and has gained attention in prior cryptanalysis. This study reveals a novel property of MANTIS and provides evidence through the introduction of a key-independent distinguisher. The researchers demonstrate the validity of the distinguisher and identify similar properties in other AES-like permutations. Future explorations in this field are proposed.
IEEE INTERNET OF THINGS JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Emmanuel Picheau, Anthony Impellizzeri, Dmitry Rybkovskiy, Maxime Bayle, Jean-Yves Mevellec, Ferdinand Hof, Hassan Saadaoui, Laure Noe, Abraao Cefas Torres Dias, Jean-Luc Duvail, Marc Monthioux, Bernard Humbert, Pascal Puech, Christopher P. Ewels, Alain Penicaue
Summary: Above a critical diameter, carbon nanotubes collapse into flattened forms, leading to unique Raman spectra changes. The presence of edge cavities and curvature changes near the edges activate a D band despite overall continuity in the structure. The differing perspectives of chemists and physicists on defects in carbon structures may lead to confusion for researchers in nanotechnologies.
Article
Chemistry, Physical
Silvio D. Silva-Santos, Anthony Impellizzeri, Acrisio L. Aguiar, Catherine Journet, Charline Dalverny, Berangere Toury, Jose M. De Sousa, Chris P. Ewels, Alfonso San-Miguel
Summary: Pressure application in multiwalled boron nitride nanotubes leads to the formation of new structures including BN nanoribbons and folded structures, resulting from the breaking of internal tubes. Both experiments and modeling show that polygonization of tube shapes is a prominent characteristic of multiwalled boron nitride nanotubes even at ambient pressure.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Ferdinand Hof, Anthony Impellizzeri, Emmanuel Picheau, Xiaoyang Che, Alain Penicaud, Christopher P. Ewels
Summary: The study revisited the structure of iodine monochloride intercalated into graphite, revealing the intercalation process and properties. It was found that the intercalated ICl can be fully reversed and cycled multiple times.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
D. Rybkovskiy, V. O. Koroteev, A. Impellizzeri, A. A. Vorfolomeeva, E. Yu Gerasimov, A. Okotrub, A. Chuvilin, L. G. Bulusheva, C. P. Ewels
Summary: The missing 1D-phosphorus allotrope, red phosphorus chains, is identified to form inside tip-opened single-walled carbon nanotubes. Comprehensive experimental and theoretical studies reveal the presence of linear P8]P2 chains and fibrous cross-linked double-chains of red phosphorus in intermediate diameter cavities. These findings provide a comprehensive understanding of the diameter dependence of confined 1D-phosphorus allotropes.
Article
Chemistry, Physical
James G. McHugh, Pavlos Mouratidis, Anthony Impellizzeri, Kenny Jolley, Dogan Erbahar, Chris P. Ewels
Summary: Dislocations are crucial for understanding plastic deformation and damage evolution in materials. In this study, the prismatic dislocations in graphite were investigated using density functional theory calculations. The energetics, structure, and mobility of different prismatic core structures were evaluated. The role of interlayer stacking in dislocation glide and climb was also considered. The results suggest that the prismatic dislocation core is stable at high temperatures and its breaking can facilitate damage recovery.
Article
Chemistry, Multidisciplinary
Yuri Tanuma, Paul Dunk, Toru Maekawa, Chris P. Ewels
Summary: In this study, we used laser-induced vaporisation to evaporate and ionise carbon nanobelts and analysed the resultant ions through mass-spectrometry. We simulated systematic hydrogen-loss studies and found that the initial hydrogen loss led to the formation of carbyne chains and pentagon-chains while maintaining the nanobelt rings. However, the alternative routes towards the formation of closed-cages were shown to be less stable than chain formation and were not observed experimentally. These results provide important insights into the collision degradation routes of curved molecular carbon species and their implications in astrochemical environments.
Article
Chemistry, Physical
Anthony Impellizzeri, Michele Amato, Chris P. Ewels, Alberto Zobelli
Summary: This paper discusses the effect of folding on the electronic structure of hexagonal boron nitride monolayers. Through density functional theory simulations, it is found that folding can result in different stacking configurations and variations in the fundamental band gap.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Viktoria V. Ivanovskaya, Alberto Zobelli, Andrea Basagni, Stefano Casalini, Luciano Colazzo, Francesco de Boni, Dimas G. de Oteyza, Mauro Sambi, Francesco Sedona
Summary: The growth of poly-p-phenylene chains and subsequent narrow graphene ribbons on silver surfaces is investigated. The study reveals the formation of organometallic molecules and chains during the debromination step, unlike on gold surfaces. The presence of intercalated bromine atoms hinders the formation of well-structured graphene ribbons at the dehydrogenation temperature.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Multidisciplinary Sciences
Manuela Meloni, Matthew J. Large, Jose Miguel Gonzalez Dominguez, Sandra Victor-Roman, Giuseppe Fratta, Emin Istif, Oliver Tomes, Jonathan P. Salvage, Christopher P. Ewels, Mario Pelaez-Fernandez, Raul Arenal, Ana Benito, Wolfgang K. Maser, Alice A. K. King, Pulickel M. Ajayan, Sean P. Ogilvie, Alan B. Dalton
Summary: This study demonstrates the use of explosive percolation to achieve a low-loading composite material with enhanced electrical properties by in-situ reduction of graphene oxide. The authors show that the materials with correlated localisation of percolating particles and emergent conductive paths can realize sharp transitions and high conductivities characteristic of the explosively-grown network.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Ruben Canton-Vitoria, Takato Hotta, Yuri Tanuma, Ioanna K. Sideri, Nikos Tagmatarchis, Chris Ewels, Ryo Kitaura
Summary: We successfully functionalized MoS2 and WS2 with Zn-porphyrin through 1,2-dithiolane addition, creating mixed 0-2 dimensional materials. The localization of porphyrins on the basal plane of TMDs resulted in a new emission band in the NIR region, originating from charge-separated states. The optical response of excitonic species was enhanced, and sensing time-response improved after functionalization, while the stability of WS2 and MoS2 against atmospheric photodegradation was also enhanced.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Yuri Tanuma, Tilen Knaflic, Bastien Anezo, Christina Stangel, Jannis Volkmann, Nikos Tagmatarchis, Hermann A. Wegner, Denis Arcon, Christopher P. Ewels
Summary: We investigated the effect of introducing C60 to (C59N)2 and [10]cycloparaphenylene ([10]CPP) using EPR measurements and DFT calculations. The incorporation of C60 resulted in the formation of stable [10]CPP D C59N-C60 center dot C [10]CPP heterodimer radicals. These radicals displayed a strong EPR signal at g = 2.0022 with a long spin coherence lifetime of 440 μs at room temperature. The [10]CPP D C59N-C60 center dot C [10]CPP oligomer was found to be more stable than C59N center dot C [10]CPP radicals and became the predominant species after thermal activation. The formation of this oligomer was thermally activated with an experimental activation energy of 0.189 eV.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Electrochemistry
Thibaud Guillemin, Camille Douard, Anthony Impellizzeri, Christopher P. Ewels, Bernard Humbert, Christophe Lethien, Scott W. Donne, Jean Le Bideau, Thierry Brousse
Summary: We investigated the contribution of pseudocapacitance to the overall capacitance of MnO2 electrodes in pure and alkaline-doped ionic liquids using step potential electrochemical spectroscopy (SPECS) and in situ Raman spectroscopy. Pseudocapacitive charge storage accounted for over half of the total capacitance with alkaline-doped ionic liquids. In situ Raman spectroscopy provided insight into the reversible ion intercalation in the MnO2 structure.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Abraao Cefas Torres-Dias, Anthony Impellizzeri, Emmanuel Picheau, Laure Noe, Alain Penicaud, Christopher Ewels, Marc Monthioux
Summary: This study reports the intercalation of iodine chains in highly crystalline multiwalled carbon nanotubes. The intercalation occurs between the concentric graphene shells instead of the central cavity. The filling is asymmetric with respect to the longitudinal axis of the nanotubes. Computational modelling and high-resolution transmission electron microscopy support the formation of asymmetric intershell channels and explain the opening of aligned intergraphene nanocavities.
C-JOURNAL OF CARBON RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Yuri Tanuma, Anastasios Stergiou, Andreja Buzan Bobnar, Mattia Gaboardi, Jeremy Rio, Jannis Volkmann, Hermann A. Wegner, Nikos Tagmatarchis, Christopher P. Ewels, Denis Arcon
Summary: Robust spin-1/2 molecular entities can be created in situ in the solid state by thermally-assisted homolysis of parent diamagnetic [10]cycloparaphenylene supramolecular complexes, offering a promising platform for building complex qubit circuits.
Article
Chemistry, Physical
A. Impellizzeri, A. A. Vorfolomeeva, N. Surovtsev, A. Okotrub, C. P. Ewels, D. Rybkovskiy
Summary: This study presents a comprehensive theoretical and experimental comparative study on different phosphorus allotropes and their monolayer equivalents, demonstrating the reliability and accuracy of applying the Placzek approximation to density functional theory calculated frequencies. By combining Density functional theory (DFT) modelling, Placzek approximation for intensities with experimental Raman spectroscopy, accurate characterisation of phosphorus species can be achieved.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
