Article
Materials Science, Multidisciplinary
K. Hareesh, Sachin R. Rondiya, S. D. Dhole, M. A. More, D. M. Phase
Summary: Through comparison experiments, it was found that the CoFe2O4/rGO/CNT emitter has higher current density and emission stability compared to other types of emitters, due to its reduced bandgap and work function, as well as sharp edges provided for easy electron liberation.
Article
Materials Science, Ceramics
Zhizheng Dai, Xianli Yu, Yue Wang, Lili Wang, Xin Wang
Summary: A CF10/rGO film was fabricated by incorporating 10 wt% carbon fiber into graphene oxide dispersion, which exhibited good mechanical properties, improved room-temperature ferromagnetism, and excellent electromagnetic wave absorption performance.
CERAMICS INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
Sampath Parasuram, Poulami Banerjee, Rishi Raj, S. Kumar, Suryasarathi Bose
Summary: Fiber-reinforced polymer composites, especially carbon fiber-reinforced epoxy (CFRE) laminates, have been widely used in the aircraft and aerospace industry. The interface between the matrix and fiber plays a critical role in determining the overall structural properties of CFRE laminates. In this study, electrophoretic deposition (EPD) was used to deposit covalently coupled multiscale graphene oxide (GO)/carbon nanotube (CNT) nanoconstructs onto carbon fiber (CF) fabric, resulting in improved flexural strength and interlaminar shear strength compared to the neat CFRE. The deposition of GO/CNT nanoconstructs improved the performance of CFREs by enhancing wettability, surface free energy, and surface roughness.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Construction & Building Technology
Dong Lu, Xianming Shi, Jing Zhong
Summary: This study investigates the interaction between carbon nanotubes (CNTs) and cement using CNT fibers as a platform. The findings reveal that oxidation treatment and graphene oxide (GO) nanocoating significantly enhance the interfacial bond strength between CNT and cement. Moreover, the observation of a continuous crystalline domain of calcium-silicate-hydrate (C-S-H) anchored to the GO nanosheets provides direct evidence for the seeding effect of GO on cement hydration.
CEMENT & CONCRETE COMPOSITES
(2022)
Article
Materials Science, Composites
Bihe Yuan, Hongji Tao, Shasha Wang, Gongqing Chen, Yuanyuan Zhan, Yong Wang, Juanjuan Zhou
Summary: This study synthesized MWCNT-RGO composite paper with better EMI shielding performance compared to pure RGO, achieving a maximum shielding effectiveness of 47.88 dB. The bicomponent microstructures with porous heterostructure balance impedance matching, promote conduction loss, and multiple reflections and scattering.
COMPOSITES COMMUNICATIONS
(2021)
Article
Chemistry, Applied
Oukrit Thonganantakul, Sira Srinives, Weerawut Chaiwat, Konrat Kerdnawee, Komkrit Suttiponparnit, Tawatchai Charinpanitkul
Summary: The study focused on the synthesis of carbon nanotubes using iron oxide embedded on graphene oxide as a catalyst, with different pretreatment and synthesis temperatures leading to the formation of either CNTs or carbon spheres.
Article
Crystallography
Siyue Wang, Xuezhi Wang, Jingjing He, Ming Xin
Summary: In this study, graphene oxide (GO) was prepared using an improved Hummers' method, and GO-carbon fiber (GO-CF) hybrid fibers were made through electrophoretic deposition (EPD). The results of X-ray diffraction (XRD) and SEM showed that the surface modification of CF with GO improved the dispersion of CF in the cement matrix and enhanced the interface bond between CF and the cement matrix. Mechanical tests demonstrated that the compressive and flexural strength of the cement matrix composites were significantly improved by GO. The addition of CF also improved the flexural strength, but not the compressive strength, of the cement matrix composites.
Article
Materials Science, Multidisciplinary
Songyan Wang, Kaiwen Cao, Lianghua Xu, Donglin Zhao, Yuanjian Tong
Summary: CNTs/RGO composite fibers with large specific surface area were prepared and investigated for their structure and electrochemical performance. The hollow CNTs/RGO composite fibers fabricated by CVD method exhibited excellent specific capacitance, indicating their potential as electrode materials for flexible energy storage devices.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Polymer Science
Mingxuan Lu, Jianshan Liao, Prabhakar V. Gulgunje, Huibin Chang, Pedro J. Arias-Monje, Jyotsna Ramachandran, Victor Breedveld, Satish Kumar
Summary: Rheological behavior of PAN/CNT dispersions with high CNT loading and their fiber spinning properties were studied, as well as compared to PAN/CNC dispersions. The results showed similarities in rheological behavior and fiber spinning performance between PAN/CNC and PAN/CNT at high filler loading.
Article
Chemistry, Physical
P. Garcia Lebiere, A. Perez del Pino, C. Logofatu, E. Gyorgy
Summary: Porous multicomponent surface layers containing bimetallic oxide nanoparticles, carbon nanomaterials reduced graphene oxide (GO), and multiwall carbon nanotubes (MWCNTs) were prepared using reactive inverse matrix assisted pulsed laser evaporation. The electrodes showed enhanced electrochemical performances due to the formation of bimetallic oxide nanoparticles, exhibiting faster charge-discharge cycling rate and improved storage capacity compared to compound layers with carbon nanomaterials, reduced graphene oxide, carbon nanotubes, and binary transition metal oxide nanoparticles.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Katarina Adstedt, Madeline L. Buxton, Luke C. Henderson, David J. Hayne, Dhriti Nepal, Yury Gogotsi, Vladimir V. Tsukruk
Summary: Carbon fibers are important components in advanced structural composites due to their high strength to weight ratio and thermal and chemical stability. Surface interactions of graphene oxide (GO) and Ti3C2Tx MXene nanoflakes on carbon fibers were studied in this research. The study revealed that these 2D materials not only enhance interface strength but also facilitate efficient charge transfer and increased conductivity, broadening the potential applications of composites.
Article
Engineering, Chemical
Jacob Strimaitis, Samuel Adjepong Danquah, Clifford F. Denize, Sangram K. Pradhan, Messaoud Bahoura
Summary: Researchers incorporated synthesized GO and rGO in AC electrodes and found that they moderately enhance the rate resistance and capacity. However, the overall ineffectiveness of GO and rGO is attributed to their isolation and infrequent distribution method.
Article
Materials Science, Composites
Lays Dias Ribeiro Cardoso, Marines Chiquinquira Carvajal Bravo Gomes, Erica Freire Antunes, Fabio Santos Silva, Vladimir Jesus Trava-Airoldi, Evaldo Jose Corat
Summary: This work presents a novel approach for direct deposition of carbon nanotubes on carbon fiber surfaces without compromising mechanical properties. The method combines low-temperature growth conditions, fast growth induction, and surface modification for successful growth. Further analysis showed the need for higher oxidation states to anchor catalysts and enable CNT growth, highlighting the importance of resizing procedures for CF wetting and mechanical properties.
COMPOSITE INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Yuchong Gao, Jiaqi Liu, Shu Yang
Summary: This article introduces a method of creating artificial muscles similar to biological muscles through the self-assembly of composite fibers. These composite fibers exhibit fast and reversible bending, along with high strength and toughness. Furthermore, when woven with nylon yarns, these artificial muscles demonstrate high work capacity and power density.
Article
Chemistry, Physical
Jae-Woo Kim, Godfrey Sauti, Benjamin D. Jensen, Joseph G. Smith, Kristopher E. Wise, Russell A. Wincheski, Roberto J. Cano, Emilie J. Siochi
Summary: This study investigated the effect of different processing methods on the interaction between carbon nanotube fibers and the matrix, finding that pre-infiltrated polymer/carbon nanotube composite fibers exhibited higher strength.
Article
Nanoscience & Nanotechnology
Sung Hyun Noh, Hak Bong Lee, Kyong Sub Lee, Hyeonhoo Lee, Tae Hee Han
Summary: In this study, a novel and scalable direct-hybridization method was developed for the fabrication of high-performance fiber-shaped supercapacitors (FSSCs). The researchers successfully anchored ruthenium hydroxide to the surface of graphene fibers and converted it into ruthenium oxide nanoparticles, without causing structural damage to the fibers. The resulting fibers showed increased gravimetric capacitance and excellent cyclic stability, while maintaining good mechanical flexibility.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Hak Bong Lee, Ganesh Kumar Veerasubramani, Kyong Sub Lee, Hyeonhoo Lee, Tae Hee Han
Summary: This study introduces a novel Joule-heating approach for manufacturing high-performance hybrid supercapacitors, and contributes to the development of fast, scalable, and cost-effective techniques for fabricating flexible, portable, and wearable fiber-based electrodes.
Article
Polymer Science
Hak Bong Lee, Kyong Sub Lee, Seok Jun Kim, Byung Il Choi, Byung Rye Go, Chan Joo Rhu, Tae Hee Han
Summary: Increased demand for plastics leads to inappropriate disposal and the production of microplastics, which pose hazardous effects to the ecosystem. Chemical resistance of microplastics to strong acids, bases, and oxidizing agents varies among different types of plastic.
Article
Chemistry, Multidisciplinary
Hwansoo Shin, Hyeonhoo Lee, Yeongbhin Seo, Woojae Jeong, Tae Hee Han
Summary: Surface modification is a simple strategy to enhance the oxidation stability and dispersibility of MXene in different organic media, and oleylamine (OAm) is a suitable ligand due to its strong interactions and commercial availability. The grafting of OAm onto MXene is achieved through covalent bonds and H bonds, and the behavior is similar to Langmuir adsorption. The OAm-MXene nanosheets exhibit excellent dispersion and coating performance, making them suitable for various applications.
Article
Chemistry, Multidisciplinary
Tae Hyung Kim, Inho Park, Kyeong Ho Lee, Jin-Han Sim, Min-Ho Park, Tae-Hee Han, Ungyu Paik, Jaeyoung Jang, Ho Bum Park, Young-Hoon Kim
Summary: Solvent-free reduction of CO2 using amorphous TiOx with embedded colloidal perovskite nanocrystals (PNCs) has been achieved by carrying out hydrolysis of titanium butoxide (TBOT) on the PNC surface. The photoexcited electrons are transferred from PNCs to TBOT, enabling photocatalytic reactions using TiOx under visible-light excitation. Efficient visible-light-driven photocatalytic reactions at PNC/TiOx interfaces, with a CO production rate of 30.43 µmol g(-1) h(-1) and accelerated degradation of organic pollutants under natural sunlight, have been demonstrated.
Article
Physics, Applied
Wonsik Eom, Hwansoo Shin, Tae Hee Han
Summary: The transitions of Ti3C2Tx MXene during thermal annealing were investigated using x-ray photoelectron spectroscopy and two-dimensional correlation spectroscopy. The thermal evolution of MXene occurs in two distinct processes: process I (25-500 ?) and process II (500-777 ?). In process I, the reduction of terminal groups and release of fluorine (-F) groups occur. Four different pathways with C-Ti-O and C-C as probable final products are identified. In process II, the reaction resulting in the removal of -F species and decomposition of the Ti3C2 region in the MXene is observed. These findings provide insights into the thermal decomposition behavior of Ti3C2Tx MXene for the design of MXene-based materials with specific functionalities.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Camilla Di Mino, Adam J. Clancy, Andrea Sella, Christopher A. Howard, Thomas F. Headen, Andrew G. Seel, Neal T. Skipper
Summary: The structures of equimolar mixtures of DMF and DMAc in DMSO were studied using neutron diffraction and isotopic substitution. Detailed 3D structural models were derived from the neutron data. The first coordination shell of the amides consists of approximately 13-14 neighbors, half of which are DMSO. The changes to the amide-amide structure in the mixture are relatively subtle compared to the pure liquids. Analysis of atom-atom correlations reveals a hierarchy of hydrogen bonds and a variety of steric and dispersion interactions, providing insight into the weak intermolecular interactions in these liquids.
JOURNAL OF PHYSICAL CHEMISTRY B
(2023)
Article
Multidisciplinary Sciences
Karolina Lisowska, Will Purser, Fuqiang Chang, Theo M. Suter, Thomas S. Miller, Andrea Sella, Christopher A. Howard, Paul F. Mcmillan, Furio Cora, Adam J. Clancy
Summary: Crystalline two-dimensional carbon nitrides with polytriazine imide (PTI) structure are shown to act amphoterically, buffering both HCl and NaOH aqueous solutions, resulting in charged PTI layers that dissolve spontaneously in their aqueous media, particularly for the alkaline solutions.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2023)
Article
Multidisciplinary Sciences
Martin C. Wilding, Chris Benmore, Thomas F. Headen, Camilla Di Mino, Thomas S. Miller, Theo M. Suter, Furio Cora, Adam J. Clancy, Andrea Sella, Paul Mcmillan, Christopher A. Howard
Summary: The layered material poly-triazine imide (PTI), which is crystalline graphitic carbon nitride, has a unique solubility in aprotic, polar solvents. The dissolved solution consists of luminescent nanosheets and ions from the intercalated salt. The solvation shells surrounding the nanoparticles and the ordering of the solvent contribute to the thermodynamically driven dissolution of PTI.
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Dong Jun Kang, Ki Hyun Lee, Sung Hyun Noh, Hwansoo Shin, Woojae Jeong, Hyeonhoo Lee, Yeongbhin Seo, Tae Hee Han
Summary: A Joule heater made of 2D nanosheets MXene with a graphene skin coating was developed to improve its oxidative stability and heating efficiency. The graphene skin layer enhanced the water impermeability of the MXene film and provided longer-lasting protection. The combination of the graphene skin and MXene resulted in a heating material with a tractable voltage range and high Joule heating efficiency.
Article
Nanoscience & Nanotechnology
Rohan B. Ambade, Mumtaz Ali, Ki Hyun Lee, Woojae Jeong, Sung Hoon Jeong, Tae Hee Han
Summary: In this study, nitrogen and sulfur co-doped carbon quantum dots (NS-CQDs) were developed and doped into TiO2-rGO nanocomposites on a flexible carbon fabric substrate for efficient solid-state photocatalytic activity. The NS-CQD-rGO-TiO2 nanocomposites exhibited improved photocatalytic degradation of organic pollutants compared to conventional N-doped CQDs-rGO-TiO2, thanks to NS co-doping, ultrasmall nanoparticle morphology, mesoporous structure, modified bandgap, and the resulting mixed-phase TiO2.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Thomas F. Headen, Camilla Di Mino, Tristan G. A. Youngs, Adam J. Clancy
Summary: The structure of pure liquid thiophene is revealed using a combination of total neutron scattering experiments with isotopic substitution and molecular simulations. Three principle local structural motifs are observed within the first solvation shell of the liquid, both in plane and out of the plane of the thiophene ring.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Wonsik Eom, Hwansoo Shin, Woojae Jeong, Rohan B. Ambade, Hyeonhoo Lee, Tae Hee Han
Summary: Investigated the effect of chemical modification on the electron-transfer behavior during the removal of the terminal groups in MXenes. Annealing in ammonia gas enhances the electrical conductivity and chemical stability of MXene materials.
MATERIALS HORIZONS
(2023)
Article
Chemistry, Physical
Ki Hwan Koh, Amir Hassan Bagherzadeh Mostaghimi, Qiaowan Chang, Yu Joong Kim, Samira Siahrostami, Tae Hee Han, Zheng Chen
Summary: This study demonstrates that precise modulation of the chemistry and structures of holey graphene with oxygen-containing functional groups can facilitate 2e(-) ORR reaction, enabling efficient H2O2 synthesis. The research provides an effective approach to enhance the ORR performance in alkaline media, with high selectivity and Faraday efficiency.
Article
Chemistry, Physical
Noelia Rubio, Theo Suter, Zahra Rana, Adam J. Clancy, Seigo Masuda, Heather Au, Gabriel Coulter, Pichamon Sirisinudomkit, Paul F. McMillan, Christopher A. Howard, Cecilia Mattevi, Dan J. L. Brett, Milo S. P. Shaffer
Summary: Functionalized graphene has shown promising potential as a support for electrocatalysts, offering stability and high surface area. The surface chemistries of graphene can be controlled and tuned through functionalization, improving the stability of both the carbon support and the metal catalyst. Functionalized graphene exhibits higher specific activity and durability compared to non-functionalized materials.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
