Article
Chemistry, Physical
Yue Zhao, Fan Wu, Yifan Zhao, Ben Jiang, Linlin Miao, Junjiao Li, Chao Sui, Huifeng Tan, Chao Wang
Summary: This study introduced a self-assembling method for preparing a hybrid material of graphene oxide paper and hollow microspheres. The hollow microspheres were found to anchor strongly on the surface of graphene oxide paper, providing better surface wettability and improving interfacial stress-transfer capability. This work offers guidance for the structural designs of graphene-based nanomaterials and expands their applications.
Review
Environmental Sciences
Kaushik Pal, Alaa A. A. Aljabali, Samo Kralj, Sabu Thomas, Fernando Gomes de Souza
Summary: Combining two-dimensional graphene and its hybrid derivatives with liquid crystals, polymers, and nanomaterials enables the formation of hybrid nanocomposites with extraordinary properties, essential for switchable device technologies. Exclusive graphene self-assembly of liquid crystalline polymer nanocomposites exhibits unique functionalities, serving as both alignment and conductive layers for novel switchable device fabrication mechanism. The ultra thin-film nanocomposites based smart switchable devices show promising applications in stretchable electronics, energy storage, photodetectors, high contrast displays, and optoelectronics.
Article
Chemistry, Physical
Sreemannarayana Mypati, Andrew Sellathurai, Marianna Kontopoulou, Aristides Docoslis, Dominik P. J. Barz
Summary: In this study, graphene oxide (GO) was utilized as a dispersing agent to prepare highly-concentrated aqueous graphene nanoplatelet (GNP) dispersions, which were then used for printing graphene films on a flexible substrate with high conductivity. The stability of such dispersions mainly depends on pH value and the ratio of GO and GNP concentrations, and different nematic phases were identified through rheological investigation.
Article
Biophysics
Susmita Prusty, Kunal Pal, Debbethi Bera, Anindita Paul, Madhubroto Mukherjee, Finaz Khan, Anindita Dey, Susmita Das
Summary: The developed novel nanocomposite [CV][DS]-GO exhibits superior antibacterial activity, improved performance, and durability of antibacterial materials, suitable for biofilm-resistant coatings on biomedical devices and surfaces.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2021)
Article
Engineering, Environmental
Jun Shang, Yanni Guo, Deliang He, Wei Qu, Yining Tang, Lei Zhou, Rilong Zhu
Summary: The novel graphene oxide-dicationic ionic liquid composite (GO-DIL) showed good adsorption performance for Cr(VI), with a high maximum adsorption capacity and maintained high adsorption capacity even after multiple cycles. The adsorption process fit well with pseudo-first-order kinetic model and Langmuir model, indicating that adsorption is a spontaneous endothermic process.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Soh Jin Mun, Yul Hui Shim, Geon Woong Kim, Sung Hwan Koo, Hyungju Ahn, Tae Joo Shin, Sang Ouk Kim, So Youn Kim
Summary: This study investigates the hierarchical structures of GO nematic liquid crystal phase during polymer crystallization using SAXS/WAXD techniques. It is found that the co-existence of GO LC and polymer crystals in GO/polymer complex influences the overall liquid crystallinity, with polymer crystallization affecting the microstructure of GO, especially in the case of interfacial crystallization. Furthermore, the interfacial crystallization of PEG on GO enhances both GO alignment and the orientation of PEG crystal.
Article
Chemistry, Physical
Shasha Wang, Xianxian Sun, Fan Xu, Minglong Yang, Weilong Yin, Jianjun Li, Yibin Li
Summary: Researchers successfully enhanced the tensile strength of graphene films by preparing GO/graphene hybrid films using graphene oxide (GO). The tensile strength of the films increased with the concentration of GO, showing excellent fracture toughness.
Article
Materials Science, Multidisciplinary
Fabio Elias Jorge, Lucas Galhardo Pimenta Tienne, Maria de Fatima Vieira Marques, Sergio Neves Monteiro
Summary: This study successfully prepared hybrid nanocomposites using polyaniline as a matrix. By incorporating different morphologies of zinc oxide nanoparticles and graphene oxide, the materials exhibited good thermal stability and thermoelectric properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Environmental Sciences
Nimra Ismail, Muhammad Imran, Muhammad Ramzan, Ayesha Anwar, Ibrahim A. Alsafari, Muhammad Asgher, Hafiz M. N. Iqbal
Summary: This work synthesized a functional porous material, aspartic acid-functionalized graphene oxide-zinc oxide, and studied its potential to remove levofloxacin (LFXN). The adsorbent was characterized using various techniques and found to have an average crystallite size of 17.30 nm. Batch adsorption studies were conducted to understand the adsorption process for LFXN. The kinetics and mechanism were analyzed using different models, revealing that the Langmuir isotherm and pseudo-first-order kinetic model were the most fitting. The GO/Asp-ZnO composite showed promising efficiency in removing LFXN.
ENVIRONMENTAL RESEARCH
(2023)
Article
Chemistry, Physical
Shan-Juan Zou, Ying-Fan Chen, Ying Zhang, Xiao-Feng Wang, Nan You, Hong-Tao Fan
Summary: In this study, nanocomposites of alpha-Fe2O3 nanoparticles on reduced graphene oxide (RGO) were prepared using a one-pot method, showing high adsorption capacity for Tetracyclines antibiotics (TAs) and fitting well with Langmuir and pseudo-second-order equations. The relatively low adsorption of oxytetracycline was attributed to its weak interactions with RGO and slack complexation with alpha-Fe2O3.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Timur Khamidullin, Ivan Lounev, Alexander Solodov, Iskander Vakhitov, Seyyed Alireza Hashemi, Ayrat M. Dimiev
Summary: This study introduces graphene oxide sheets into epoxy resin, and orients them with an external magnetic field to create composites with significant anisotropy in electric properties. The developed protocol allows for the fabrication of anisotropic materials with high performance, showing promising applications for antennas, radars, vibration sensors, dielectric lenses, etc. The physics behind the electrical conductivity of the composite materials is defined as interfacial polarization.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Bulti Pramanick, Trivender Kumar, Sumanta Chowdhury, Aditi Halder, Prem Felix Siril
Summary: This study demonstrates the significant enhancement of electrocatalytic activity in Pd nanostructures through crystal engineering and support on graphene. Graphene, as a catalyst support, preserves the surface sites of Pd nanoparticles, enhances electronic conductivities, and improves mass transfer and charge transfer.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Rui Zhao, Xinyue Xu, Liang Hu
Summary: A composite hydrogel with superior mechanical properties and sensitivity was prepared for fabricating high-performance wearable sensors. The sensors showed high sensitivity to changes in strain and pressure, along with the ability to cyclically recover and self-heal.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Talia Tene, Stefano Bellucci, Marco Guevara, Edwin Viteri, Malvin Arias Polanco, Orlando Salguero, Eder Vera-Guzman, Sebastian Valladares, Andrea Scarcello, Francesca Alessandro, Lorenzo S. Caputi, Cristian Vacacela Gomez
Summary: In this study, pristine reduced graphene oxide (rGO) was used to remove cationic pollutants from water, such as methylene blue and mercury ions. The pristine rGO showed high adsorption capacity and short adsorption time, and exhibited a mixed physisorption-chemisorption process. These findings provide a new perspective for the removal of cationic pollutants using oxidized graphene materials.
Article
Optics
M. M. Jahanbakhshian, M. A. Kiani, M. Arshadi Pirlar, R. Karimzadeh
Summary: The electro-optic effect is an important mechanism for refractive index tuning, and this research measured the quadratic electro-optic coefficient for a graphene oxide film. The results showed a significantly higher coefficient compared to other materials, indicating the potential for improving devices based on this effect. The graphene oxide film's giant electro-optic Kerr coefficient can reduce power consumption and device complexity by requiring a lower electric field.
Article
Instruments & Instrumentation
Lin Yang, Jiliang Liu, Shirish Chodankar, Stephen Antonelli, Jonathan DiFabio
Summary: This work introduces the instrumentation and software used for microbeam scattering and structural mapping at the Life Science X-ray Scattering beamline at NSLS-II. The adjustable beam size and simultaneous collection of scattering data at small and wide angles are achieved using a two-stage focusing scheme and multiple Pilatus detectors. Fly scans are implemented to minimize time interval between scattering patterns, and an in-vacuum sample environment is developed to reduce background scattering. The processing of data involves quantifying features from reciprocal coordinates and constructing structural maps. The paper presents examples of mapping onion epidermal cell walls and tomographic sectioning of an intact poplar stem.
JOURNAL OF SYNCHROTRON RADIATION
(2022)
Article
Materials Science, Multidisciplinary
Roxana Dinu, Ugo Lafont, Olivier Damiano, Alice Mija
Summary: This study proposes a chemical combination of aromatic bio-based epoxy monomers with potential bio-based anhydrides to produce thermosetting materials with competitive performances. The resulting materials have high bio-based carbon content, high glass transition temperatures, high storage moduli, high thermal stability, and low water absorption values, making them suitable for applications in space, aerospace, or naval industry.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Optics
Riccardo Castagna, Andrea Di Donato, Rachele Castaldo, Roberto Avolio, Oriano Francescangeli, Daniele Eugenio Lucchetta
Summary: In this work, we report the fabrication and photonic activation of a novel photomobile polymer film based on a double layered asymmetric configuration. The film, made of PVC/isoprene tape with a layer of graphene-oxide attached, exhibits significant bending under illumination at different intensities and with coherent and incoherent light sources. The bending effect is more efficient under high light intensities or NIR radiation for incoherent light sources. The presence of the graphene-oxide layer is responsible for the restoration of the position of the film, as indicated by permanent bending when the exposed side is painted black.
Article
Chemistry, Physical
Chung-Hao Liu, Catherine Cheu, John G. Barker, Lin Yang, Mu-Ping Nieh
Summary: A well-defined discoidal bicelle composed of three lipids, DPPC, DHPC, and DPPG, can serve as a generalized template for the synthesis of hydrophobic polymer nano-rings. Styrene monomers migrate to the rim region during polymerization, forming well-defined nano-rings. This facile synthesis method is applicable to various hydrophobic monomers, and the nano-rings have a large interfacial area, making them potential building blocks for functional materials.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Analytical
Riccardo Castagna, Cristiano Riminesi, Andrea Di Donato, Oriano Francescangeli, Daniele Eugenio Lucchetta
Summary: In this study, we investigated the use of highly transparent holographic phase reflection and transmission volume gratings as linear compression and rotation sensors. The gratings were recorded in a holographic mixture based on multi-reticulated acrylate and haloalkanes. We used a simplified version of the mixture used in previous works and observed interesting features associated with the roles of rhodamine 6G dye at different writing wavelengths. The reflection gratings achieved a maximum diffraction efficiency of around 50% and showed a shift in the reflection peak when used as linear compression sensors. The transmission gratings achieved a maximum diffraction efficiency of around 45% and demonstrated high sensitivity to small rotations in a free-standing configuration.
Article
Chemistry, Physical
Riccardo Castagna, Cristiano Riminesi, Andrea Di Donato, Oriano Francescangeli, Daniele Eugenio Lucchetta
Summary: This study reports on the fabrication and performance of highly transparent holographic phase transmission volume gratings in the visible region. The gratings achieved a diffraction efficiency higher than 80% with a grating pitch of 300 nm and a refractive index modulation of 0.018. The use of a holographic mixture based on multi-reticulated acrylate and haloalkanes, along with a synergic combination of camphore-quinone and R6G, enabled the efficient initiation of the photo-polymerization process, resulting in high transparency and efficiency holographic structures.
Article
Chemistry, Physical
Daniele Eugenio Lucchetta, Paolo Castellini, Milena Martarelli, Lorenzo Scalise, Giuseppe Pandarese, Cristiano Riminesi, Gautam Singh, Andrea Di Donato, Oriano Francescangeli, Riccardo Castagna
Summary: This work examines the changes in rotational speed of a thin photomobile film induced by light using a single-axis acoustic levitator. The film is suspended in air within a stationary acoustic field and its rotations are detected in real time by monitoring a low power He-Ne laser. By illuminating the film with an external laser source, it bends and its rotational speed alters by approximately 20 Hz. This contactless long-distance interaction provides an ideal platform for developing and studying electro-optics devices in microgravity and low-friction conditions, with potential applications in fields like 3D dynamic displays and aerospace.
Article
Polymer Science
Roxana Dinu, Ugo Lafont, Olivier Damiano, Alice Mija
Summary: In this study, high performance thermosets free of bisphenol A were successfully synthesized by copolymerization of an aromatic tris epoxide with anhydrides. The prepared thermosets exhibited excellent hardness, high thermal stability, and good flame retardancy properties.
Article
Chemistry, Multidisciplinary
Prakash Nepal, Abdullah Al Bashit, Lin Yang, Lee Makowski
Summary: This article discusses the challenges and strategies of extracting information from fibrils using SAXS. By using micro- and nano-beams, scattering from very small volumes can be measured. The correlations between the positions of fibrils and other constituents have a significant impact on the observed scattering. A method to compute the spatial correlation function of the fibril in the direction perpendicular to the fibril axis is proposed, providing information about the fibril structure and tissue organization.
JOURNAL OF APPLIED CRYSTALLOGRAPHY
(2022)
Article
Optics
Daniele Eugenio Lucchetta, Andrea Di Donato, Oriano Francescangeli, Cristiano Riminesi, Gautam Singh, Riccardo Castagna
Summary: We report on the development of easily-made, flexible, wearable, and stretchable holographic gratings for tunable distributed-feedback lasers. These gratings are formed by integrating reflection volume phase grating in a flexible substrate using optical holography. Photopolymerizable mixture containing a new compound derived from haloalkanes and acrylates is used for recording the gratings. The laser devices exhibit low emission threshold and the amplified spontaneous emission can be continuously tuned by bending the film.
Article
Chemistry, Physical
Riccardo Castagna, Cristiano Riminesi, Maria Savina Pianesi, Simona Sabbatini, Andrea Di Donato, Gautam Singh, Oriano Francescangeli, Emma Cantisani, Paolo Castellini, Daniele Eugenio Lucchetta
Summary: We have developed a photo-mobile polymer film that can be triggered by light or heat. The film is made using recycled quartz and consists of a multi-acrylate polymer layer and a layer containing oxidized 4-amino-phenol and N-Vinyl-1-Pyrrolidinone. It has high temperature resistance and asymmetrical design that allows for independent motion when exposed to heat. ATR-FTIR measurements confirm its asymmetrical configuration. This technology may have potential applications in energy harvesting due to the piezoelectric properties of quartz.
Article
Materials Science, Multidisciplinary
Roxana Dinu, Ugo Lafont, Olivier Damiano, Francois Orange, Alice Mija
Summary: Due to concerns about global environmental impact and CO2 emission, sustainable composite materials with advanced performance are required. This study developed environmentally friendly carbon fiber reinforced composites (CFRCs) using a biobased epoxy resin derived from natural and renewable compounds. The CFRCs showed high performance with a glass transition temperature Tg> 350°C, a storage modulus of approximately 42 GPa, an interlaminar shear strength of approximately 63 MPa, and a compressive strength of approximately 400 MPa. Additionally, the CFRCs demonstrated chemical recyclability, reprocessability, and excellent intrinsic flame resistance.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Engineering, Aerospace
Laura Pernigoni, Ugo Lafont, Antonio M. Grande
Summary: One of the challenges in space exploration is to protect astronauts from the dangers of the space environment. Space suits are not currently able to withstand damage from micrometeoroids and orbital debris, which can lead to catastrophic consequences. The integration of self-healing materials into spacesuits has become a topic of interest, as it could improve safety and operational life. This study focuses on analyzing the healing performance of self-healing polymers in spacesuits before and after exposure to simulated space radiation, and aims to bridge the gap between standard characterization and the effects of space radiation on these materials.
Article
Chemistry, Physical
Gabin Charpentier, Ugo Lafont, Sofia Teixeira de Freitas
Summary: This study investigates the performance changes of two commonly used adhesives in spacecraft assembly under environmental aging conditions and evaluates their adhesion to CFRP and aluminum adherents.
Article
Engineering, Aerospace
Laura Pernigoni, Ugo Lafont, Antonio Mattia Grande
Summary: In recent years, there has been increasing interest in introducing self-healing materials into space structures. The ability to autonomously repair damage caused by micrometeoroids and orbital debris would enhance safety, increase spacecraft longevity and reduce replacement costs. However, the interaction between these materials and the space environment, particularly space radiation, needs further analysis and understanding. This study investigates the shielding ability of self-healing materials for human protection in crewed missions.
CEAS SPACE JOURNAL
(2023)
