Review
Chemistry, Multidisciplinary
Sri Hari Bharath Vinoth Kumar, Ruslan Muydinov, Bernd Szyszka
Summary: The investigation and development of reduced graphene oxide (rGO) derived from graphene oxide (GO) have made significant progress in the past decade. Despite having relatively inferior electronic characteristics compared to pristine graphene, rGO's high-yield production from inexpensive graphite and ease of fabrication with solution processing have led to its potential for large-scale applications and commercialization. The mature use of plasma technologies for GO reduction has unique merits and could expedite the pathway to commercialization, with applications across multiple fields in nanotechnology.
Article
Chemistry, Multidisciplinary
Xiaoguang Ma, Yimeng Wang, Xiaojian Hao, Min Gu, Qiming Zhang
Summary: This study reports a giant nonlinear optical response in GO films under two different photoreduction mechanisms. The rGO after photochemical and photothermal reduction exhibits a giant nonlinear optical property with a significant TPA coefficient. The versatile optical nonlinear properties of GO film suggest a huge potential in advanced photonic and optoelectronic devices.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Peng Zhang, Zhi Cao, Chunle Liu, Pengni Li, Hui Kong, Ting Li, Xiaomin Luo, Jianyan Feng, Kaiyun Yuan, Ruqing Xu
Summary: In this study, a self-supporting graphene film with an irregular interlayer structure and excellent performance was prepared by electrochemical exfoliation and microwave reduction. The optimal conditions for preparing low-oxidation graphene were found to be with ammonium sulfate as the electrolyte, a concentration of 0.2 M, a voltage of 8 V, and a pH of 11. Afterwards, microwave post-processing significantly improved the electrical conductivity and electromagnetic shielding performance of the graphene film. This environmentally friendly preparation strategy has great potential for practical applications in flexible wearables, intelligent electronic devices, and electromagnetic wave protection.
Article
Materials Science, Paper & Wood
Yasir Beeran Pottathara, Vid Bobnar, Yves Grohens, Sabu Thomas, Rupert Kargl, Vanja Kokol
Summary: The dielectric response of thin films prepared from graphene oxide and TEMPO oxidized cellulose nanofibres was studied, showing potential for energy storage devices. The films exhibited excellent dielectric properties, with a high dielectric constant and AC conductivity, making them promising for practical applications.
Article
Materials Science, Multidisciplinary
Lihong Sun, Hua Song, Yunzhen Chang, Wenjing Hou, Ying Zhang, Honggang Li, Gaoyi Han
Summary: Competitive ligands such as citric acid, sulfosalicylic acid, and tartaric acid were used to facilitate the removal of manganese ions from graphene oxide in this study. Results showed that the presence of competitive ligands increased the purification efficiency and significantly reduced manganese content. The addition of different ligands also affected the microstructure of the hydrogels, with sulfosalicylic acid leading to the best performance.
DIAMOND AND RELATED MATERIALS
(2021)
Review
Chemistry, Multidisciplinary
Alexandra M. L. Oliveira, Monica Machado, Gabriela A. Silva, Diogo B. Bitoque, Joana Tavares Ferreira, Luis Abegao Pinto, Quirina Ferreira
Summary: Graphene oxide, with its unique properties, has been widely used in nanomedicine as a component of drug delivery systems. Research studies have demonstrated its effectiveness in controlling drug dosage and timely delivery when incorporated into multilayer films. This review provides an overview of the latest research developments in biomedical applications using graphene oxide for drug delivery systems, including film production and characterization, in vitro and in vivo experiments, main applications of graphene oxide in biomedical devices, and its biocompatibility properties.
Article
Chemistry, Physical
Andreas Nordenstrom, Nicolas Boulanger, Artem Iakunkov, Igor Baburin, Alexey Klechikov, Alexei Vorobiev, Alexandr Talyzin
Summary: The intercalation of methylene blue (MB) into thin multilayered graphene oxide (GO) films was found to be significantly stronger than that of crystal violet (CV) and rose bengal (RB). This is attributed to the difference in the geometrical shape of planar MB compared to essentially nonflat CV and RB molecules. Additionally, graphite oxides and restacked GO films exhibit different sorptions of MB.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Crystallography
Grazia Giuseppina Politano, Carlo Versace
Summary: This study investigates the electrical and optical characteristics of GO and RGO films by performing electric impedance measurements, optical microscopy, and variable angle spectroscopic ellipsometry tests. The results show that the electric resistance of RGO films is significantly lower than that of GO films. Additionally, thermal annealing enhances the optical conductivity and absorption coefficient of GO films.
Article
Energy & Fuels
Muhammad Kashif, Erdawaty Jafaar, Siti K. Sahari, Foo W. Low, Nguyen D. Hoa, Awais Ahmad, Anees Abbas, Zainab Ngaini, Muhammad Shafa, Ahsanulhaq Qurashi
Summary: Introducing a new organic compound K-Azo enhances the electrical and optical performance of graphene oxide and reduced graphene oxide nanostructured films. The presence of the organic sensitizer significantly improves the conductivity of the thin films, offering potential applications in photovoltaic solar cells. The long-range pi-electron delocalization in the organic sensitizer contributes to the improved conductivity of the graphene oxide and reduced graphene oxide films.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Energy & Fuels
Chau Van Tran, Mahima Khandelwal, Jungbae Lee, Anh Phan Nguyen, Jung Bin In
Summary: This study proposes a controlled self-propagating reduction of GO films by adjusting the base temperature within low values, demonstrating competitive performance and cycling stability of rGO films as supercapacitor electrodes. The research opens a new avenue for producing high-quality rGO at minimal energy cost using the self-propagating reduction of GO films.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Materials Science, Multidisciplinary
Soo-Yeon Kim, Ha-Eun Gang, Gyu-Tae Park, Ha -Bin Jeon, Young Gyu Jeong
Summary: The study reports the microstructure, optical, and electrothermal properties of reduced graphene oxide (RGO) thin films fabricated by spin-coating graphene oxide (GO) dispersion on a quartz substrate and thermal reduction at different temperatures. Increasing the thermal reduction temperature leads to an increase in carbon content and a decrease in oxygen content in the RGO films. The optical transmittance and sheet resistance of the RGO films decrease with increasing thermal reduction temperature.
RESULTS IN PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
M. Swiniarski, A. Wroblewska, A. Duzynska, M. Zdrojek, J. Judek
Summary: The thermal annealing process of graphene oxide thin films is found to be a kinetic process with one activation energy. The electrical transport mechanism evolves with the annealing temperature, with the Variable Range Hopping transport model changing with the reduction level from 3D, 2D to Efros-Shklvoskii.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Multidisciplinary Sciences
Christos Pavlou, Maria Giovanna Pastore Carbone, Anastasios C. Manikas, George Trakakis, Can Koral, Gianpaolo Papari, Antonello Andreone, Costas Galiotis
Summary: A new fabrication method was used to produce continuous cm-scale graphene/polymer nanolaminates, which showed enhanced electromagnetic interference shielding effectiveness, conductivity, and mechanical properties.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Coatings & Films
Gustavo Alexandre Viana, Douglas Soares da Silva, Richard Landers, Jilian Nei de Freitas, Marcelo Gradella Villalva, Francisco das Chagas Marques
Summary: This study systematically investigated the species effusion processes of thermally reduced multilayered GO using thermal desorption mass spectroscopy. The results revealed that at around 230 degrees C, collective desorption of H2O, CO2, CO, and H occurred, while at temperatures higher than 400 degrees C, only uncoupled CO2 and CO desorptions were detected. The annealing temperature range of ambient to 1000 degrees C led to a significant variation in conductivity, indicating an insulating-conductive transition.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Electrochemistry
Dalibor Karacic, Sanjin J. Gutic, Borislav Vasic, Vladimir M. Mirsky, Natalia V. Skorodumova, Slavko V. Mentus, Igor A. Pasti
Summary: In this study, the kinetics and mechanism of graphene oxide (GO) reduction were investigated using various techniques and theoretical calculations. The results provide valuable insights for precise control of reduction degree and conductive area percentage, enabling tailored reduced GO for specific electrochemical applications.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Physical
Jie Sheng, Jingshan He, Dun Ma, Yuanbo Wang, Wu Shao, Tian Ding, Ronghao Cen, Jingwen He, Zhihao Deng, Wenjun Wu
Summary: This study presents an innovative approach to improve the photovoltaic conversion characteristics and stability of perovskite solar cells through carbon electrode interface modification. By in-situ polymerization and carbonization on the surface of nano-graphite, a dendritic structure carbon electrode is formed, reducing the work function and aligning the energy levels with perovskite. This leads to improved charge and hole collection efficiency, resulting in increased photovoltaic conversion efficiency. Furthermore, the modified carbon electrode-based perovskite solar cells exhibit exceptional stability, maintaining high efficiency even without encapsulation.
Article
Chemistry, Physical
Guodong Shi, Jian Song, Xiaoxiao Tian, Tongtong Liu, Zhanjun Wu
Summary: This study demonstrates the improvement of mechanical properties and reduction of coefficient of thermal expansion (CTE) in graphene oxide (GO)/epoxy (EP) nanocomposites by enhancing the interface between GO and EP through functionalization and incorporating rigid-flexible interphases. The results reveal that the SiO2-PEA-GO hybrid exhibits better strengthening and toughening effects, as well as lower CTE, compared to the PEA-GO hybrid due to the presence of rigid-flexible interfaces with higher bonding strength and better energy dissipation mechanisms. Additionally, the nanocomposites with longer polyetheramine (PEA) molecules in the rigid-flexible interphases demonstrate higher strength and toughness, while maintaining a lower CTE. This work provides a promising strategy for constructing adjustable flexible-rigid interfacial structures and offers potential in developing GO/EP nanocomposites with high mechanical properties and low CTE.
Article
Chemistry, Physical
Rafal Janus, Sebastian Jarczewski, Jacek Jagiello, Piotr Natkanski, Mariusz Wadrzyk, Marek Lewandowski, Marek Michalik, Piotr Kustrowski
Summary: In this study, a facile procedure for the synthesis of CMK-1 and CMK-2 carbon replicas was developed. The method utilizes basic laboratory equipment and a renewable carbon source, and operates under mild conditions. The resulting carbon mesostructures exhibit exquisite replication fidelity and structural homogeneity, making them suitable for applications in various fields.
Article
Chemistry, Physical
Anqi Wang, Connor J. MacRobbie, Alex Baranovsky, Jean-Pierre Hickey, John Z. Wen
Summary: In this study, a novel polymer-free nanothermite aerogel with a wide range of nanoparticle loading was fabricated via a new additive manufacturing process. The SEM images showed a unique porous structure formed by extra thin rGO sheets, wrapping individual nanothermite clusters. The DSC-TGA results and high-speed combustion videos confirmed the enhanced energetic performance of the printed specimen.
Article
Chemistry, Physical
Wanze Wu, Misheng Zhao, Shiwei Miao, Xiaoyan Li, Yongzhong Wu, Xiao Gong, Hangxiang Wang
Summary: Superhydrophobic solar-driven interfacial evaporator is an energy-efficient technology for seawater desalination, which is easily fabricated using robust photothermal superhydrophobic coating and substrate. The created bifunctional coating on the melamine sponge substrate shows stable and highly efficient photothermal and superhydrophobic performance for seawater desalination. This superhydrophobic solar-driven interfacial evaporator is expected to have wide applications in seawater desalination.
Article
Chemistry, Physical
Zichen Xiang, Zhi Song, Tiansheng Wang, Menghang Feng, Yijing Zhao, Qitu Zhang, Yi Hou, Lixi Wang
Summary: This study presents a co-electrospinning synthesis strategy to fabricate lightweight and porous Co@C composite nanofibres with wideband microwave attenuation capacity. The addition of MOF-derived Co additives enhances the low-frequency absorption performance.
Article
Chemistry, Physical
J. Snow, C. Olson, E. Torres, K. Shirley, E. Cazalas
Summary: This study investigates the use of a perovskite-based graphene field effect transistor (P-GFET) device for X-ray detection. The sensitivity and responsivity of the device were found to be influenced by factors such as X-ray tube voltage, current, and source-drain voltage. Simulation experiments were conducted to determine the dose rate and energy incident on the device during irradiation.
Article
Chemistry, Physical
Zuzana Jankovska, Lenka Matejova, Jonas Tokarsky, Pavlina Peikertova, Milan Dopita, Karolina Gorzolkova, Dominika Habermannova, Michal Vastyl, Jakub Belik
Summary: This study provides new insights into microwave-assisted pyrolysis of scrap tyres, demonstrating that it can produce microporous carbon black with potential application in xylene adsorption. Compared to conventional pyrolysis, microwave pyrolysis requires less time and energy while maintaining similar adsorption capacity.
Article
Chemistry, Physical
Max Bommert, Bruno Schuler, Carlo A. Pignedoli, Roland Widmer, Oliver Groning
Summary: A detailed understanding of the interaction between molecules and two-dimensional materials is crucial for incorporating functional molecular films into next-generation 2D material-organic hybrid devices. This study compares the energy level alignment of different-sized fullerenes on a Moire superstructure and finds that C-84 fullerenes can be either neutral or negatively charged depending on slight variations of the electrostatic potential. This discovery suggests a new path to achieve ambipolar charge transfer without overcoming the electronic gap of fullerenes.
Article
Chemistry, Physical
Yuanjing Cheng, Xianxian Sun, Ye Yuan, Shuang Yang, Yuanhao Ning, Dan Wang, Weilong Yin, Yibin Li
Summary: The dual-structure aerogel (GS) consisting of flexible silica fibers and graphene honeycomb structures exhibits excellent resilience, flexibility, and reliability. It also shows remarkable wave absorbing performance, making it an ideal candidate for microwave absorption applications such as flexible electronics and aerospace.
Article
Chemistry, Physical
Shuyu Fan, Yinong Chen, Shu Xiao, Kejun Shi, Xinyu Meng, Songsheng Lin, Fenghua Su, Yifan Su, Paul K. Chu
Summary: Graphene coatings are promising solid lubrication materials due to their mechanical properties. This study presents a new method for in situ deposition of high-quality graphene coatings on hard substrates using NiCo solid solution and competitive reaction strategies. The graphene coating deposited on substrates with deep NiCo solid solution demonstrates superior low-friction and durability.
Article
Chemistry, Physical
Mengdi Wang, Sanyin Qu, Yanling Chen, Qin Yao, Lidong Chen
Summary: The improved thermoelectric properties of conducting polymers are achieved by selectively capturing single-walled carbon nanotubes (SWNTs) in a conducting polymer film, leading to increased carrier mobility and reduced thermal conductivity. The resulting composite film exhibits significantly higher electrical conductivity and lower thermal conductivity compared to films with a mixture of SWNTs. This work provides a convenient and efficient method to enhance the thermoelectric properties of conducting polymers.
Review
Chemistry, Physical
Heng Wei, Weihua Li, Kareem Bachagha
Summary: This article reviews the research progress of carbon nanotube-based microwave absorbing materials (MAMs) in recent years, covering the fundamental theory, design strategies, synthesis methods, and future development directions.
Article
Chemistry, Physical
Chenguang Shi, Junlong Huang, Zongheng Cen, Tan Yi, Shaohong Liu, Ruowen Fu
Summary: This study developed a high-performance Li metal host material, which achieved dendrite-free Li deposition with a low nucleation overpotential and high Coulombic efficiencies through the combination of Ti3C2-g-PV4P sheets and Ag nanoparticles. The full cells assembled with the Li@host anode and LiFePO4 cathode exhibited high discharge capacity and excellent cycling stability, demonstrating a perspective design for future energy storage devices.
Article
Chemistry, Physical
Tomotaro Mae, Kentaro Kaneko, Hiroki Sakurai, Suguru Noda
Summary: A new partial prelithiation method for SiO/C-CNT electrodes was developed, which showed reduced irreversible capacity and achieved high energy densities with good reversibility. The method allows for precise control of the degree of prelithiation and is applicable to various chemistries.