Article
Physics, Applied
Ping Wu, Wenshu Yang, Jun Sun, Gaohui Wu
Summary: This paper proposes a novel composite cathode mixing CNTs with metals, which demonstrates a much longer lifetime under high voltage and frequency conditions compared to normal copper cathodes. Microscopic morphology analysis reveals that CNT micro-protrusions and whiskers are crucial for the good emission properties of the new cathode.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Biotechnology & Applied Microbiology
Stefania Sandoval, Gerard Tobias
Summary: Fullerenes are employed as versatile agents to cork the open tips of MWCNTs and to promote the release of inorganic material filled within the nanotubes. Two different strategies using annealing and wet procedure are proposed to trigger the release of the filler.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Siru He, Xuda Hong, Hairong Zheng, Dong Liang
Summary: The study demonstrates that modifying the commonly used compact and planar titanium alloy substrate using an alkali approach can enhance the adhesion with screen-printed carbon nanotube cathodes and significantly improve device performance, providing a practical strategy for further enhancement of field emission performance.
Article
Engineering, Biomedical
Yang He, Chenyan Hu, Zhijia Li, Chuan Wu, Yuanyuan Zeng, Cheng Peng
Summary: Early diagnosis of infectious diseases and tumors is crucial for global public health. Carbon nanomaterials have been widely studied and proven to improve the accuracy of diagnosis in various scientific fields. This review focuses on their applications in diagnosing infectious diseases and tumors over the past five years. Recent advances in biosensing, bioimaging, and nucleic acid amplification technologies using carbon nanomaterials are discussed, highlighting their unique properties and the challenges and opportunities for future clinical applications.
MATERIALS TODAY BIO
(2022)
Article
Chemistry, Physical
Qianyu Ji, Bowen Wang, Yajuan Zheng, Xueping Yan, Fanguang Zeng, Bingheng Lu
Summary: The study introduces bulk graphene/carbon nanotubes hybrid materials for field emission applications, showcasing excellent stability and high efficiency. These bulk emitters are suitable for high-power cold cathode applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Vitaly Gurylev, Tzu-Kang Chin, Artur Useinov
Summary: The study investigated the correlation between field emission characteristics of TiO2@CNTs nanocomposite and TiO2 crystallinity by charge transfer mechanism. Results showed that CNTs covered with amorphous TiO2 exhibited the best field emission properties due to more efficient charge transfer caused by oxygen vacancies in amorphous TiO2.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Oscar Jover, Alberto Martin-Jimenez, Hannah M. Franklin, Ryan M. Koenig, Jose I. Martinez, Nazario Martin, Koen Lauwaet, Rodolfo Miranda, Jose M. Gallego, Steven Stevenson, Roberto Otero
Summary: This study characterizes the adsorption, self-assembly, and electronic structure of [5,5]-C-90 fullertube molecules on different noble metal surfaces using scanning tunneling microscopy and spectroscopy. The results show that the shape of the molecular orbitals of the adsorbed fullertubes matches the theoretical calculations, and some of the molecular orbitals are influenced by the quantum confinement imposed by the hemifullerene caps. These findings provide a conceptual framework for the design and understanding of custom fullertube molecules.
Article
Chemistry, Multidisciplinary
Jiuzhou Zhao, Zhenjun Li, Matthew Thomas Cole, Aiwei Wang, Xiangdong Guo, Xinchuan Liu, Wei Lyu, Hanchao Teng, Yunpeng Qv, Guanjiang Liu, Ke Chen, Shenghan Zhou, Jianfeng Xiao, Yi Li, Chi Li, Qing Dai
Summary: This study developed a UV laser beam patterning technique to reliably fabricate nanocone-shaped carbon nanotubes field-emitter array (NCNA) with a cone-tip radius of approximately 300 nm, providing smaller turn-on fields and higher and more stable emission in emitters compared to unpatterned counterparts. This technique may be widely applied in the fabrication of high-performance CNTs field-emitter arrays.
Correction
Materials Science, Multidisciplinary
Xinchuan Liu, Yuanxun Li, Jianfeng Xiao, Jiuzhou Zhao, Chi Li, Zhenjun Li
Summary: The study investigates the field emission stability of vertically aligned carbon nanotubes through anchoring for X-ray imaging applications. The results demonstrate that anchoring plays a crucial role in enhancing the field emission performance and stability of carbon nanotubes.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Physical
Mesias Orozco-Ic, Maria Dimitrova, Jorge Barroso, Dage Sundholm, Gabriel Merino
Summary: The pseudo-pi model is used to calculate the current densities and induced magnetic fields of large planar and nonplanar molecules, providing a way to assess the aromatic character of large carbon molecules by determining the pi-component of the ring-current strengths.
JOURNAL OF PHYSICAL CHEMISTRY A
(2021)
Article
Biochemistry & Molecular Biology
Andrzej Hudecki, Dorota Lyko-Morawska, Anna Kasprzycka, Alicja Kazek-Kesik, Wirginia Likus, Jolanta Hybiak, Kornelia Jankowska, Aleksandra Kolano-Burian, Patryk Wlodarczyk, Weronika Wolany, Jaroslaw Markowski, Wojciech Maziarz, Iwona Niedzielska, Wojciech Pakiela, Mariusz Nowak, Marek J. Los
Summary: This study developed a new composite biomaterial based on hydroxyapatite with different dopants, which showed good mechanical properties and bacteriostatic effects against Gram-positive bacteria.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Materials Science, Multidisciplinary
Rikiya Kikukawa, Yasushi Ohkawa, Yoshiki Yamagiwa
Summary: An experimental setup and procedure were developed to improve the electron emission stability in the long-term operation of carbon nanotube-based field emission cathodes (FECs). By using Xe plasma processing aging method, optimal plasma processing conditions were found to enhance the emission stability and extend the lifetime of FECs.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Multidisciplinary Sciences
Olukunle C. Olawole, Dilip K. De, Sunday O. Oyedepo, Fabian Ezema
Summary: In this study, five mathematical models were compared for predicting the emission current density of graphene-based thermionic energy converters, with the Modified Richardson Dushman model (MRDE) found to be the most suitable. The MRDE model is dependent on temperature, Fermi energy, work function, and coefficient of thermal expansion.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Analytical
Changkun Dong, Ruizi Liu, Jie Wang, Haipeng Yu, Song Kang, Weijun Huang, Weikang Jia, Weijin Qian
Summary: A novel low pressure helium sensing method using carbon nanotube field emission has been developed, showing promising applications in leak detection. By analyzing the field emission currents from multi-walled carbon nanotubes with low crystallinities, it was found that the work functions of CNT emitters remained consistent with helium adsorptions. The simulation results showed that adsorption of helium atoms on carbon atoms at defects enhanced the field emission current, enabling the detection of helium gas.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Engineering, Electrical & Electronic
Gurjinder Kaur, Arvind Dasgupta, Sudheer Korlam, Gaurav Modi, Narasimha Vinod Pulagara, Indranil Lahiri
Summary: Carbon nanotubes (CNTs) show promising field emission properties on foams compared to foils, due to the high surface area of the foam structure facilitating CNT growth and enhanced field emission response. Among the samples studied, CNTs prepared on nickel foam exhibit the best field emission performance with low turn-on field, high field enhancement factor, and stable electron emission.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Ajay Kumar, Dnyandeo Pawar, Dattatray J. Late, Rajesh Kanawade
Summary: This study proposes and investigates a Fabry-Perot Interferometer-based polyvinyl alcohol-coated sensor platform for non-invasive detection of acetone vapor at room temperature, for the prospective study of diabetes diagnosis. The sensor is simple, miniaturized, flexible, cost-effective, and highly sensitive for low acetone vapor concentration detection.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Review
Chemistry, Multidisciplinary
Manila Ozhukil Valappil, Subbiah Alwarappan, Vijayamohanan K. Pillai
Summary: Phosphorene quantum dots (PQDs) are unique zero-dimensional nanostructures with special physicochemical and surface properties. Considerable progress has been made in PQD research in catalysis, particularly in the fields of photocatalysis and electrocatalysis. This review systematically summarizes the synthesis methods and physicochemical properties of PQDs, and critically discusses their potential applications and future prospects in catalysis.
Article
Energy & Fuels
Mohammad Badrooj, Farid Jamali-Sheini, Naeimeh Torabi
Summary: Achieving a low-toxicity mixed Sn/Pb halide perovskite solar cell with higher performance and lower cost is still a major challenge. In this study, the element Zn was incorporated as a substitute cation for the toxic element Pb into the CH3NH3Sn0.25Pb0.75I3 perovskite compound, leading to improved crystal quality, surface coverage, grain size, and reduced non-radiative recombination mechanism. The findings provide a new area for further research on lead reduced hybrid perovskite solar cells.
Article
Materials Science, Ceramics
Maryam Zebarjad, Farid Jamali-Sheini, Ramin Yousefi
Summary: In this study, nanostructured pyrite (FeS2) films doped with different concentrations of Zn were fabricated using the electrodeposition method. Photodetectors were made using FTO/TiO2/un- and Zn-doped FeS2/Au configurations for optoelectronic applications. The effects of Zn concentration and TiO2 buffer layer on device efficiency were investigated. Results showed that Zn doping increased photocurrent and conductivity, reduced recombination rate and defects, and enhanced carrier mobility. The device with the lowest Zn doping concentration exhibited the highest efficiency, with an EQE of 48.16%, an R of 206.30 mAW(-1), and a D* of 3.3x10(+9) (Jones) in the visible light spectrum.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Maryam Zamani, Farid Jamali-Sheini, Mohsen Cheraghizade
Summary: This research investigated the effect of Ag coating on the physical properties of mesostructured bismuth sulfide (Bi2S3) films for optoelectronic applications. The results showed that Ag coating reduced the morphology size on the surface of the film, decreased the optical energy band gap, and increased the carrier concentration and flat band potential. The study also revealed the presence of space-charge-limited current behavior in the free-coated device, indicating changes in the electronic band structure due to Ag coating. The addition of Ag coating enhanced the quality parameters of the photodetectors, and the response increased with longer wavelengths. Mesostructured Bi2S3 films have the potential to be used as self-powered and ultraviolet-to-visible range photodetectors.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Electrical & Electronic
Behrouz Baghbanzadeh-Dezfuli, Farid Jamali-Sheini, Mohsen Cheraghizade
Summary: In this research, the effect of sulfur dopant concentrations on the physical properties of nanostructured antimony selenide films was investigated. It was found that sulfur dopant changed the size of nanoparticles on the film surface and improved the electrical and photodetection performance of the devices.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Chemistry, Physical
Monidipa Pramanik, Mukta V. V. Limaye, Mahendra S. Pawar, Dattatray J. Late, Shashi B. Singh
Summary: In this study, vanadium carbide (V(2C)Tx) MXene was successfully synthesized and treated with an ammonia solution under different pressures using a hydrothermal process. The results show that the morphology of V(2)CTx MXene changed from uneven multilayered micrometre-size sheets to uniform few-layered nanometer-size sheets as the pressure increased. The optical and electronic properties were influenced by nitrogen-related defects, quantum confinement, and induced lattice strain due to the post-ammonia treatment.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Optics
Behrouz Baghbanzadeh-Dezfuli, Farid Jamali-Sheini, Mohsen Cheraghizade
Summary: In this study, antimony selenide (Sb2Se3) nanostructure films were deposited by the electrodeposition method using deionized water and ethylene glycol as solvents. The films were analyzed and compared using different methods, and it was found that using ethylene glycol as a solvent resulted in more suitable stoichiometric ratio, enhanced uniformity, and compactness in the structure of Sb2Se3 films.
Article
Thermodynamics
Somayeh Kamalifar, S. M. Peyghambarzadeh, Shima Azizi, Farid Jamali-Sheini
Summary: Fouling is a major cause of energy loss in oil industry, leading to significant economic losses when oil operation units are shut down. There is currently no global or specific solution for reducing crude oil fouling. This study proposes an accurate and sensitive thermal method for fouling detection in crude oil systems, and investigates the impact of key operating parameters on fouling rate. The results show that heat flux, bulk temperature, and fluid velocity have direct or inverse relationships with fouling rate.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Engineering, Electrical & Electronic
Prashant H. Shinde, Yogita Padwal, Sanjeewani R. Bansode, Ratna Chauhan, Shrikant Charhate, Rishi B. Sharma, Hassan Fouad, Chiaki Terashima, Suresh W. Gosavi, Dattatray J. Late
Summary: The zinc sulphide-reduced graphene oxide nanocomposite has been synthesized and investigated for its potential use in photocatalysis for dye degradation. The combination of ZnS and rGO results in enhanced photocatalytic properties, with rGO acting as a support for ZnS nanoparticles and preventing their agglomeration.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Prashant H. Shinde, Yogita Padwal, Yogesh Waghadkar, Hassan Fouad, Chiaki Terashima, Ratna Chauhan, Shrikant Charhate, Muthupandian Ashokkumar, Suresh W. Gosavi, Dattatray J. Late
Summary: We have successfully synthesized ZnS-MoS2 nano-heterostructure via hydrothermal method and studied its photocatalytic activity under sunlight. The nano-heterostructure exhibited efficient charge separation and extended light absorption, leading to the generation of electron-hole pairs for the degradation of MB dye molecules. The optimized ZnS-MoS2 sample synthesized at 48 h showed excellent performance with 97% degradation in 30 min, attributed to enhanced crystallinity, good charge carrier ability, optimal heterojunction formation, and well-defined morphology with reduced defects.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Mohsen Cheraghizade, Farid Jamali-Sheini
Summary: This research investigated the impact of different zinc (Zn) concentrations on the physical and optoelectronic properties of copper selenide (Cu3Se2) nanostructures for self-powered and solar-range photodetector applications. The results showed the formation of a tetragonal Cu3Se2 phase with a spherical morphology. The samples exhibited Cu-poor stoichiometry, and the incorporation of Zn atoms in the Cu3Se2 lattice reduced the optical energy band gap. It was observed that Zn concentrations activated the space charge-limited conduction (SCLC) mechanism in the Cu3Se2 devices. The study of band alignments and barrier potentials at different interfaces provided insights into the observed transportation mechanism. Finally, the Zn-doped sample with the highest Zn concentration demonstrated the highest values of responsivity (R), gain (G), and specific detectivity (D*) at 0.127 mA/W, 21.77%, and 3.92 x 10+8 Jones, respectively.
Article
Chemistry, Inorganic & Nuclear
Mehrdad Kavosh, Farid Jamali-Sheini, Ramin Yousefi, Mohsen Cheraghizade
Summary: This research examines the physical and electrical properties of copper sulfide (CuS) nanostructures grown using the sonochemical method. The impact of incorporating zinc (Zn) dopant at varying concentrations is analyzed through various techniques. The study reveals that Zn dopant increases the strain on the crystal lattice of CuS, resulting in a hexagonal covellite structure and smaller CuS nanostructures. Optical analyses indicate changes in absorption intensity and photoluminescence emissions with the addition of Zn dopant, while the electrical properties of CuS are improved. Ultimately, the study demonstrates the enhancements in physical and electrical properties of Zn-doped CuS samples, leading to improved quality parameters of the photodetector.
SOLID STATE SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Bikash Ranjan Isaac, Subbiah Alwarappan, Vijayamohanan K. Pillai
Summary: In this study, a transformation of multiwalled carbon nanotubes to graphene nanoribbons and graphene quantum dots was achieved through an ionic liquid-assisted electrochemical approach. The tunability of interlayer spacing and the introduction of heteroatoms in carbon nanotubes could significantly impact the mechanical and electrical properties of the resulting nanoribbons. This research highlights the importance of van der Waals gap engineering in designing advanced 2D materials and their composites for various applications.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Chiteri Gautam, Devyani Srivastava, Gabriele Kociok-Kohn, Suresh W. Gosavi, Vinod K. Sharma, Ratna Chauhan, Dattatray J. Late, Abhinav Kumar, Mohd. Muddassir
Summary: Two Schiff base complexes, [CuL2] (Cu-Sal) and [CoL3] (Co-Sal), were synthesized and characterized. Crystal structure analysis showed a square planar geometry around Cu(ii) and various intermolecular non-covalent interactions in Cu-Sal. Both complexes were used as sensitizers in TiO2 based dye sensitized solar cells (DSSCs), and Co-Sal exhibited better photovoltaic performance than Cu-Sal due to improved light absorption and dye loading.
