Article
Chemistry, Multidisciplinary
Quanfeng He, Lanping Zeng, Lianhuan Han, Matthew M. Sartin, Juan Peng, Jian-Feng Li, Alexander Oleinick, Irina Svir, Christian Amatore, Zhong-Qun Tian, Dongping Zhan
Summary: Studies have shown that the adsorption of atomic hydrogen on single layer graphene can effectively store hydrogen and is suitable for solutions involving hydrogen fuel cells for vehicles. Utilizing a Pt-electrocatalyzed spillover-surface diffusion-chemisorption mechanism, hydrogenation of graphene can be carried out under mild conditions, demonstrating high storage capacity and stability.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
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
Anshul Gupta, Gino Baron, Patrice Perreault, Silvia Lenaerts, Radu-George Ciocarlan, Pegie Cool, Paulo G. M. Mileo, Sven Rogge, Veronique Van Speybroeck, Geert Watson, Pascal Van der Voort, Maarten Houlleberghs, Eric Breynaert, Johan Martens, Joeri F. M. Denayer
Summary: Clathrates, as a promising material for hydrogen storage, have advantages such as low cost, reversible reaction, environmentally friendly nature, and low risk of flammability, despite the lower capacity predicted by simulations. The ability to tailor the properties of clathrates and the rapid technological advancements in this field provide immense opportunities for customization and growth. This review aims to analyze the current developments in solid-state hydrogen storage materials, focusing on hydrogen clathrates, and presents a global overview for future research.
ENERGY STORAGE MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Zhichen Yan, Shuangyue Wang, Xianjue Chen, Geedhika K. Poduval, John A. Stride
Summary: Chemical vapor deposition (CVD) shows great potential in large-scale production of graphene films. A new method has been developed to directly grow graphene films on crystalline silicon wafers with a 300 nm oxide layer using a seeded-CVD growth approach. The use of methane as feedstock and optimized graphene seeds has improved the film formation, which consists of graphene layers formed by the coalescence of expanding graphene seeds according to SEM, X-ray photoelectron and Raman spectroscopies. The films also exhibit regions of single graphene crystallites resulting from lateral growth of the seeds. Moreover, the unilateral conductivity of the graphene films suggests potential application in device fabrication due to the presence of graphene nanoribbons.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Chemistry, Physical
Thiago A. Moura, Wellington Q. Neves, Rafael S. Alencar, Y. A. Kim, M. Endo, Thiago L. Vasconcelos, Deyse G. Costa, Graziani Candiotto, Rodrigo B. Capaz, Paulo T. Araujo, Antonio G. Souza Filho, Alexandre R. Paschoal
Summary: The unique electronic and vibrational properties of linear carbon chains (LCCs) have attracted attention recently. Raman spectroscopy has been widely used to identify LCC and study its properties. This study investigates the optical resonance window of LCCs encapsulated by multi-walled carbon nanotubes (MWCNTs) and a Raman signature assigned to the LCC's longitudinal acoustic phonon mode. First-principles calculations support the conclusions.
Article
Chemistry, Multidisciplinary
Johannes Binder, Aleksandra Krystyna Dabrowska, Mateusz Tokarczyk, Katarzyna Ludwiczak, Rafal Bozek, Grzegorz Kowalski, Roman Stepniewski, Andrzej Wysmolek
Summary: Hydrogen is a crucial component of green energy systems, and intense scientific efforts are needed in the field of materials science for this development. Two-dimensional crystals like hBN have shown promise as effective barriers for molecular hydrogen. However, it is uncertain if large-area hBN layers fabricated through industrial methods maintain these excellent properties. This study demonstrates that electron-beam-induced splitting of water creates hBN bubbles that can store molecular hydrogen for long periods, even under extreme mechanical deformation. Additionally, the epitaxial hBN allows for the direct visualization and monitoring of hydrogen generation through radiolysis of interfacial water, suggesting that hBN is not only a potential candidate for hydrogen storage but also for unconventional hydrogen production schemes.
Article
Polymer Science
Guillaume Pillet, Pascal Puech, Sebastien Moyano, Frederic Neumayer, Wolfgang Bacsa
Summary: The conductivity of thermoplastic polymers can be effectively enhanced by incorporating carbon nanotubes on the surface. Multiwall carbon nanotubes thin films were transferred onto the polymer surface to form composite layers with electrical conductivity up to 8 S/cm, showing variations at 2.8 vol% of nanotubes. The distribution and quantity of nanotubes were studied using transmission electron microscopy and optical transmission measurements.
Article
Engineering, Manufacturing
Ayaka Aoki, Toshio Ogasawara, Takuya Aoki, Yuichi Ishida, Yoshinobu Shimamura, Yoku Inoue
Summary: This study utilized polarized Raman spectroscopy to assess the strain in aligned multi-walled carbon nanotube/epoxy composites, aiming to clarify the effective elastic modulus of the carbon nanotubes. The Raman shift rate of the G' band of the carbon nanotubes was found to be 18.84 cm(-1)/% corresponding to the tensile strain of the composite specimen. Through Mori-Tanaka theory and consideration of the three-dimensional orientation distribution of the carbon nanotubes, the effective elastic modulus of the carbon nanotubes was estimated to be 400 GPa. The results demonstrated the utility of Raman spectroscopy in experimentally evaluating the effective elastic modulus of multi-walled carbon nanotubes in composites.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2023)
Article
Chemistry, Multidisciplinary
Samuel Faucher, Matthias Kuehne, Hananeh Oliaei, Rahul Prasanna Misra, Sylvia Xin Li, Narayana R. Aluru, Michael S. Strano
Summary: Recent measurements have shown that fluids under extreme confinement, such as water in narrow carbon nanotubes, deviate significantly from theoretical descriptions. In this study, precise replicas of carbon nanotubes filled with water were generated and analyzed using Raman spectroscopy. The results revealed the presence of submicron vapor-like and liquid-like domains in partially filled nanodroplet states, and a Clausius-Clapeyron-type model was used to calculate the heats of condensation of water inside different diameter carbon nanotubes. The findings suggest the potential of molecular engineering of nanoconfined liquid/vapor interfaces for water treatment or membrane distillation.
Article
Chemistry, Multidisciplinary
Weili Cui, Lei Shi, Kecheng Cao, Ute Kaiser, Takeshi Saito, Paola Ayala, Thomas Pichler
Summary: Carbyne is a one-dimensional allotrope of carbon, which is stable when grown encapsulated in carbon nanotubes. By using isotopic labeling as a tuning mechanism, researchers were able to control its properties and achieve pioneering results with around 11.9% of C-13 labeling.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Review
Materials Science, Multidisciplinary
Zheling Li, Libo Deng, Ian A. Kinloch, Robert J. Young
Summary: Raman spectroscopy is a crucial technique for analyzing carbon-based materials, providing unique insights into their microstructure. It allows for characterization of aspects such as orientation, layers, defects, and doping, enabling standardization and quality control. The application of Raman spectroscopy in studying graphene has aided in the analysis of carbon nanotubes and fibers. The technique can also be used to track deformation in carbon-based materials and study interfacial micromechanics in composites.
PROGRESS IN MATERIALS SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Bassim Arkook, Ahmed Alshahrie, Numan Salah, Mohammad Aslam, Saeed Aissan, Ashwaq Al-Ojeery, Ahmed Al-Ghamdi, Akihisa Inoue, El-Sayed Shalaan
Summary: A composite film of graphene and fibrous multiwall carbon nanotubes was prepared by plasma-enhanced chemical vapor deposition, with the addition of PdMg alloy nanoparticles leading to improved hydrogen storage capacity and absorption-desorption kinetics. The fibrous structure of the MWCNTs alongside the graphene sheets provided a large active region for hydrogen reaction, while the catalytic nature of Pd and high absorption capacity of Mg nanoparticles enhanced the reaction kinetics and hydrogen content.
Article
Chemistry, Physical
Lei Shi, Ryosuke Senga, Kazu Suenaga, Johnny Chimborazo, Paola Ayala, Thomas Pichler
Summary: The recent achievement of confining carbyne in double-walled carbon nanotubes represents a major breakthrough in materials science, but controlling its properties remains a challenge. Researchers have successfully fabricated confined carbyne with tailored properties through localized photothermal heating and in-situ Raman spectroscopy. The evident interaction between the nanotubes and confined carbyne alters the tube's diameter, indicating a potential mechanism for tailoring the properties of the confined carbyne.
Review
Chemistry, Multidisciplinary
Tripti Rimza, Sumit Saha, Chetna Dhand, Neeraj Dwivedi, Shiv Singh Patel, Shiv Singh, Pradip Kumar
Summary: This article discusses the advantages of carbon-based sorbents as hydrogen storage media, highlighting their low cost, environmental friendliness, and availability. It also introduces the application status of some carbon-based materials in solid-state hydrogen storage technology, as well as the predictions of hydrogen uptake performance by some experimental and theoretical studies and the impact of carbon material synthesis methods on their performance.
Article
Chemistry, Multidisciplinary
Rui Lobo, Noe Alvarez, Vesselin Shanov
Summary: The study compared advanced carbon nanostructured electrodes under similar hydrogen uptake/desorption conditions using recent molecular beam-thermal desorption spectrometry. Results showed that the carbon nanostructured electrodes exhibited enhanced hydrogen adsorption and storage capabilities, with carbon nanotube threads showing potential to replace heavier metals or alloys as hydrogen storage media.
Article
Materials Science, Multidisciplinary
J. Vera, E. Mosquera-Vargas, J. E. Diosa
Summary: Polymeric membrane films based on poly(vinyl alcohol) (PVA) and chitosan (CS) were prepared with the addition of phosphoric acid. The modified membranes showed lower glass transition temperature and melting point, as well as higher conductivity, making them suitable for the fabrication of electrolyte membranes for fuel cells.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Physics, Condensed Matter
N. Chidhambaram, S. Senthil Kumari, W. Nirmala, S. Gobalakrishnan, T. Arun, R. Udayabhaskar, Mauricio J. Morel
Summary: This study presents an insightful investigation on the integrative impact of tin and graphene on the physical features of ZnO-Sn@Graphene nanopowders. The results demonstrate that the in situ synthesis strategy restricts the growth of nanoparticles on graphene sheets, resulting in dispersed semiconductor nanoparticles. Additionally, the amalgamation of ZnO-Sn with graphene significantly reduces the optical bandgap value and enhances the efficiency of photogenerated charge carriers separation and photoluminescence quenching.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Spectroscopy
Edgar Mosquera-Vargas, Carlos Marin
Summary: The structural changes of n-alkanes during melting and freezing processes were investigated using Raman spectroscopy. Different n-alkanes undergo different phase transitions, including the rotator phase and the alpha phase. During freezing, even n-alkanes form the rotator phase before the crystalline solid phase.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Multidisciplinary Sciences
J. D. Lopez, J. E. Diosa, G. Garcia, E. Mosquera, H. Correa
Summary: In this study, molecular dynamic calculations were performed using a proposed inter-ionic temperature-dependent potential to investigate the thermodynamic and structural properties of lead fluoride. The results successfully simulated the anomaly in the dependence of the lattice parameter on temperature.
Review
Multidisciplinary Sciences
Rodrigo A. Munoz Meneses, Gerardo Cabrera-Papamija, Fiderman Machuca-Martinez, Luis A. Rodriguez, Jesus E. Diosa, Edgar Mosquera-Vargas
Summary: Pollution caused by plastic materials poses a negative impact on the health of the planet. Finding solutions to transform discarded plastics into new materials is crucial for establishing a circular and sustainable production model.
Article
Materials Science, Multidisciplinary
J. Martinez, S. Dionizio, N. Gutierrez, E. Mosquera, J. E. Diosa, G. Bolanos, O. Moran
Summary: Heterostructures composed of bismuth ferrite (BiFeO3) and vanadium dioxide (VO2) films were successfully fabricated, and their properties were investigated. The study revealed that the structural transition of VO2 has an impact on the ferroelectric properties of BiFeO3.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
C. J. Aguilar, E. Mosquera, F. Gracia, J. E. Diosa, J. E. Rodriguez-Paez
Summary: Porous nanostructures of PrMnO3 were synthesized using the sol-gel method with different solvents, ethanol and ethylene glycol. The choice of solvent was found to significantly affect the properties of PrMnO3, and the magnetic behavior of the nanostructures also varied with temperature.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Chemistry, Multidisciplinary
Jhonatan Martinez, Edgar Mosquera-Vargas, Victor Fuenzalida, Marcos Flores, Gilberto Bolanos, Jesus Diosa
Summary: Thin films of BiFeO3, VO2, and BiFeO3/VO2 were grown on monocrystalline substrates, and their surface characteristics were studied using various techniques. The films exhibited good adhesion, homogeneous ordering, and low roughness, indicating a good coupling between the materials. The films also showed potential for applications such as resistive memories and solar cells.
Article
Engineering, Multidisciplinary
Edgar Mosquera-Vargas, Daniela Herrera-Molina, Jesus E. Diosa
Summary: TiO2 nanoparticles and TiO2/CS nanocomposites were successfully synthesized and characterized. The degradation capability of these materials towards methyl orange under ultraviolet light was investigated.
Review
Chemistry, Analytical
Arun Thirumurugan, Ananthakumar Ramadoss, Shanmuga Sundar Dhanabalan, Sathish-Kumar Kamaraj, Natarajan Chidhambaram, Suyambrakasam Gobalakrishnan, Carolina Venegas Abarzua, Yerko Alejandro Reyes Caamano, Rednam Udayabhaskar, Mauricio J. Morel
Summary: MXene is a new emerging material with wider physicochemical characteristics for various applications. The formation of hybrid composites with other materials makes MXene interesting for multifunctional applications. The selection of magnetic nanomaterials for MXene composites is important for utilizing magnetic characteristics.
Article
Materials Science, Multidisciplinary
Edison Rivera, Rodrigo A. Munoz-Meneses, Lorena Marin, Malka Mora, Jesus A. Tabares, Milton Manotas-Albor, Luis A. Rodriguez, Jesus E. Diosa, Edgar Mosquera-Vargas
Summary: Hematite submicron particles were successfully synthesized from the oil-contaminated ferric oxide precursor obtained from the hot-rolled steel industry in Colombia. The samples, which are difficult to recycle for the steel industry, cause irreparable environmental damage due to poor disposal. By proposing a synthetic route that involves washes with solvent and alcohols, the oil was completely removed, and functional magnetic particles were obtained. Characterization studies showed the majority phase changed from wustite to hematite after the synthesis process, and the structural, optical, and magnetic properties of the samples were studied.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Lidia E. Santibanez-Velasquez, Alexis Guzman, Mauricio J. Morel
Summary: In this research, tailing samples were leached using hydrochloric acid to investigate the effects of time, temperature, and acid concentration on the extraction of iron, copper, aluminum, calcium, and magnesium. The results showed that iron concentration increased with acid concentration, while copper was affected by time and temperature, and aluminum decreased with acid concentration. Calcium and magnesium showed no clear trend in variation.
Article
Chemistry, Multidisciplinary
Marcel Gabriel Clerc, Alvaro Hugo Cornejo, Sebastian Echeverria-Alar, Gregorio Gonzalez-Cortes, Paulina Ivette Hidalgo, Patricio Javier Luo, Mauricio Javier Morel, Jorge Vergara, Mario Wilson
Summary: Chiral liquid crystal mixtures are important for their ability to produce optically active three-dimensional structures. This study investigates the phase transitions in a mixture of a chiral oxadiazole derivative liquid crystal and a traditional nematic liquid crystal. The properties of the mixture can be used to create various material functionalities depending on the composition.
Article
Biochemistry & Molecular Biology
Raju Prasanna-Kumari, Daniela Herrera-Molina, Arturo Fernandez-Perez, Jesus E. Diosa, Edgar Mosquera-Vargas
Summary: CdS:Al thin films were prepared on a glass substrate by the CBD method and characterized by XRD, Raman spectroscopy, AFM, SEM, UV-vis and PL spectroscopies. XRD analysis confirmed a hexagonal structure with preferred (002) orientation in all samples. The crystallite size and surface morphology varied with aluminum content. Raman spectra showed LO vibrational modes and their overtones. The optical properties of CdS thin films were found to be influenced by the incorporation of aluminum.
Review
Chemistry, Analytical
Durga Prasad Pabba, Mani Satthiyaraju, Ananthakumar Ramasdoss, Pandurengan Sakthivel, Natarajan Chidhambaram, Shanmugasundar Dhanabalan, Carolina Venegas Abarzua, Mauricio J. Morel, Rednam Udayabhaskar, Ramalinga Viswanathan Mangalaraja, Radhamanohar Aepuru, Sathish-Kumar Kamaraj, Praveen Kumar Murugesan, Arun Thirumurugan
Summary: This article presents the superior advantages of 2D MXenes for nanogenerators and reviews the recent progress in this field. The topics covered include the applications of MXenes in nanogenerators, renewable energy, classifications and working principles of nanogenerators, materials for energy harvesting, and combinations of MXene with other active materials. Furthermore, the synthesis and properties of MXene, MXene nanocomposites with polymeric materials, and internal improvement mechanisms of MXenes for nanogenerators using 3D printing technologies are discussed in detail. Finally, the key points of this review are summarized, and some thoughts on potential approaches for better performance of nanogenerators using MXene-based nanocomposite materials are presented.
