Article
Chemistry, Physical
Weilu Gao, Davoud Adinehloo, Xinwei Li, Ali Mojibpour, Yohei Yomogida, Atsushi Hirano, Takeshi Tanaka, Hiromichi Kataura, Ming Zheng, Vasili Perebeinos, Junichiro Kono
Summary: This study investigates the chirality-dependent electronic transport properties of single-chirality SWCNT films, revealing pronounced electronic localization phenomena and providing insights for designing and deploying macroscopic SWCNT solid-state devices. The research highlights the importance of understanding chirality-dependent behaviors in SWCNTs for various applications.
Article
Chemistry, Physical
Yan Gao, Fangqian Han, Yahan Li, Xiaofan Qin, Dong Li, Qianru Wu, Guangyi Lin, Xiuyun Zhang, Maoshuai He
Summary: This study developed a supported catalyst that resists sintering and successfully synthesized SWNTs with a narrowly distributed chirality by incorporating Co in the supported catalyst. The addition of Pd promoter further optimized the catalytic reaction conditions, achieving preferential synthesis of (6, 5) SWNTs.
Article
Chemistry, Multidisciplinary
Lingbo Liu, Ling Lei, Keni Zeng, Kangbing Wu, Nianjun Yang
Summary: Red phosphorus (RP) nanoparticles with tuned surface chemistry were synthesized using a phosphorus-amine approach. In situ spectroscopic techniques were used to monitor the cleavage of P-O-P bond and the formation of P-O-C bond during the transition. RP nanoparticles grown on single-walled carbon nanotube (SWCNT) showed efficient sensing of p-phenylenediamine (PPD) in hair dyes.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Md Wazedur Rahman, Seyedamin Firouzeh, Sandipan Pramanik
Summary: Functionalizing carbon nanotubes with DNA strands in a helical manner can polarize carrier spins through the CISS effect. The conduction mechanism is strongly localized due to DNA functionalization, and the observed magnetoresistance arises from interference effects between different hopping paths. CISS-induced spin polarization increases carrier localization length significantly in the low temperature range, impacting magnetoresistance in a non-trivial way not seen in conventional systems.
Article
Chemistry, Physical
Hai-Ning Zhang, Yin Fan, Hui-Shen Shen
Summary: This study analyzed the engineering Poisson's ratio (EPR) and incremental Poisson's ratio (IPR) of single-walled carbon nanotubes (SWCNTs) with different chiral angles and investigated the effect of chirality on rigidity. It was found that SWCNTs with different chiral angles exhibited different mechanical properties in terms of EPR and IPR in tension, compression, longitudinal, and radial directions. The critical strain for auxeticity was also found to be chirality-dependent. Additionally, a method for explaining the negative IPR phenomenon was proposed based on the contribution to radial strain.
Article
Chemistry, Multidisciplinary
Md Wazedur Rahman, Mari C. Manas-Torres, Seyedamin Firouzeh, Juan Manuel Cuerva, Luis Alvarez de Cienfuegos, Sandipan Pramanik
Summary: This study demonstrates that certain molecules can induce spin polarization in two-dimensional CNT networks, and the spin signal can survive at length scales significantly exceeding 1 µm. Using the versatility of peptide chemistry, it was shown that spin polarization depends on molecular structural features such as chirality and molecule-nanotube interactions, with both chirality-dependent and chirality-independent effects contributing to the overall spin signal. Additionally, the magnetic field dependence of the spin signals was explored, and it was found that the chirality-dependent signal exists only in certain field angles.
Review
Chemistry, Multidisciplinary
Zhenbang Chu, Baohui Xu, Jie Liang
Summary: This article focuses on the challenges and developments in the application of CVD-grown carbon nanotubes in IC interconnects. Chemical vapor deposition is the most promising method for growing carbon nanotubes that can be compatible with integrated circuit manufacturing processes.
Article
Chemistry, Applied
Hakimeh Saeidiroshan, Leila Moradi
Summary: This research presents the first example of utilizing multiwalled carbon nanotubes/guanidine/Ni (II) as a new and effective catalyst, prepared through a new method and used for the green synthesis of pyrazolopyranopyrimidines. The catalyst showed high yields, short reaction times, easy separability, and multiple reusability without significant loss of activity.
APPLIED ORGANOMETALLIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Md Wazedur Rahman, Mari C. Manas-Torres, Seyedamin Firouzeh, Sara Illescas-Lopez, Juan Manuel Cuerva, Modesto T. Lopez-Lopez, Luis Alvarez de Cienfuegos, Sandipan Pramanik
Summary: Supramolecular short-peptide assemblies are important biomaterials used in biomedical applications. These materials can self-assemble into chiral hierarchical structures triggered by various stimuli. The resulting supramolecular chirality can modulate protein and cell interactions. Recently, research has focused on developing chiral materials with potential spintronic applications. By combining different chiral sources, such as homochiral peptides and glucono-delta-lactone, researchers have shown that the supramolecular chirality and spin signal can be modulated. This study opens up new possibilities for developing CISS-based spintronic devices and circuits.
Article
Chemistry, Multidisciplinary
Xiaojun Wei, Xin Luo, Shilong Li, Weiya Zhou, Sishen Xie, Huaping Liu
Summary: High-purity enantiomer separation of chiral SWCNTs remains a challenge, but the length-dependent interactions with the gel medium provided an effective strategy for controlling nanotube length and achieving high-purity separation. By using gentler pulsed ultrasonication and a low-defect long SWCNT dispersion, we achieved ultrahigh enantiomeric purity of up to 98%, the highest reported so far. The obtained enantiomers exhibited perfect symmetry in their circular dichroism spectra, enabling standardization for SWCNT enantiomer characterizations and evaluations.
Article
Chemistry, Multidisciplinary
Taishi Nishihara, Akira Takakura, Keisuke Matsui, Kenichiro Itami, Yuhei Miyauchi
Summary: Researchers have statistically verified the chirality distribution of 413 individual as-grown single-walled carbon nanotubes using broadband Rayleigh spectroscopy. The results show an increasing trend in chirality distribution with a distinct anomaly at approximately 20 degrees, which can be explained by the influence of armchair-shaped site configurations at the catalyst-nanotube interface growth rate.
Review
Chemistry, Physical
Marianna Kharlamova, Maria G. Burdanova, Maksim Paukov, Christian Kramberger
Summary: This review focuses on the importance of synthesizing high-quality chirality-pure single-walled carbon nanotubes, as well as research directions such as chirality-selective synthesis, sorting of SWCNTs, and applications of separated SWCNTs in various fields.
Review
Chemistry, Multidisciplinary
Sibo Chen, Yaxin Jiang, Zhenxing Zhu, Qi Zhang, Chenxi Zhang, Qiang Zhang, Weizhong Qian, Shijun Zhang, Fei Wei
Summary: This article reviews the fluidized structure control and fluidization principles of carbon nanotubes and their nanocomposites, highlighting the importance of hierarchical structural evolution and nano-agglomerated fluidization.
Article
Nanoscience & Nanotechnology
Sophia Zanoni, Brennan P. Watts, Kevin Tvrdy
Summary: Despite the commercial availability of many different hydrogel formulations, the effective gel-based purification of single-walled carbon nanotubes (SWNT) remains exclusive to Sephacryl S-200. In this study, various commercially available gels and custom-synthesized gels were investigated for their ability to purify SWNT, with findings showing that different gels exhibit unique SWNT chiral selectivity and physiochemical properties. Superose 6 was found to adsorb more SWNT than Sephacryl S-200 and exhibit a unique preference for specific SWNT chiralities, providing insights into the rational design of gels for SWNT purification.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Analytical
Xuemei Lv, Yongfa Zhang, Ying Wang, Guojie Zhang, Jun Liu, Yang Lu
Summary: Carbon nanotubes were successfully synthesized by Fe-K catalytic pyrolysis of coal, revealing key factors such as insufficient carbon sources, limited catalytic effect of potassium carbonate, synergistic effect of Fe and K, and the molten state of the catalyst.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Materials Science, Multidisciplinary
Shigeyuki Umezawa, Takashi Douura, Koji Yoshikawa, Daisuke Tanaka, Vlad Stolojan, S. Ravi P. Silva, Mika Yoneda, Kazuma Gotoh, Yasuhiko Hayashi
Summary: Heat treatment of metal-organic frameworks (MOFs) can produce functional carbons suitable for supercapacitor electrodes. This study investigated the carbonization process of two zinc-based MOFs and found that pore generation is crucial for achieving high capacitance. The findings provide valuable insights for the development of other metal-based MOF-derived multifunctional carbons.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Chemistry, Physical
Jiadong Zhou, Chao Zhu, Yao Zhou, Jichen Dong, Peiling Li, Zhaowei Zhang, Zhen Wang, Yung-Chang Lin, Jia Shi, Runwu Zhang, Yanzhen Zheng, Huimei Yu, Bijun Tang, Fucai Liu, Lin Wang, Liwei Liu, Gui-Bin Liu, Weida Hu, Yanfeng Gao, Haitao Yang, Weibo Gao, Li Lu, Yeliang Wang, Kazu Suenaga, Guangtong Liu, Feng Ding, Yugui Yao, Zheng Liu
Summary: This study reveals a competitive-chemical-reaction-based growth mechanism that allows for the growth of transition metal chalcogenides and transition metal phosphorous chalcogenides with different compositions and phases. It provides an interesting platform for the exploration of 2D TMPCs and TMCs.
Article
Chemistry, Multidisciplinary
Ignacio Bernabe Virseda, Shiraz Ahmed Siddiqui, Alexander Prado-Roller, Michael Eisterer, Hidetsugu Shiozawa
Summary: A novel molecular assembly of cobalt-sulfate coordination polymer and melamine was synthesized under acidic conditions. Bar-shaped pink monocrystals, up to 1 mm in length, were found to align along magnetic field lines near a strong magnet. Magnetometry revealed no hysteresis at temperatures as low as 2 K, but instead exhibited magnetic anisotropy and antiferromagnetic coupling.
Review
Chemistry, Physical
Weiguang Chi, Sanjay K. Banerjee, K. G. D. I. Jayawardena, Sang Il Seok, S. Ravi P. Silva
Summary: In recent years, there has been intensive research on perovskite/silicon tandem solar cells, leading to a rapid increase in their efficiencies. The most suitable subcell for tandem devices is a debatable topic, and this study summarizes three attractive silicon solar cells: passivated-emitter rear-cell (PERC), tunnel oxide passivated contact (TOPCon), and heterojunction (HJT) cells. Their structures and features are elucidated to understand their mechanism and potential for optimum performance. Furthermore, the characteristics and performance of perovskite/silicon tandem cells with these subcells are compared and discussed, with emphasis on the contribution of passivation layer and structure design on both sides. The recombination layer between the two subcells is also analyzed in depth, considering material chemistry, light absorption, and charge transport for achieving an optimized structure.
ACS ENERGY LETTERS
(2023)
Article
Multidisciplinary Sciences
Michal Delkowski, Christopher T. G. Smith, Jose V. Anguita, S. Ravi P. Silva
Summary: Future space travel requires lightweight and robust structural materials that can withstand extreme conditions and multiple entries into orbit. Current inorganic materials cannot meet these requirements. Carbon fiber reinforced polymers (CFRPs), although highly stable, have limitations due to environmental instabilities and electrostatic discharge. To improve space travel and structural engineering, a more robust and improved CFRP is needed. In this study, a superlattice nano-barrier-enhanced CFRP with a density of approximately 3.18 g/cm³ is presented. The composite exhibits enhanced radiation resistance and electrical conductivity, while maintaining ultra-dimensional stability even after temperature cycles.
Article
Materials Science, Multidisciplinary
Raheel Riaz, Bhaskar Dudem, Martina Aurora Costa Angeli, Ali Douaki, Mukhtar Ahmad, Abraham Mejia-Aguilar, Roberto Monsorno, Paolo Lugli, Ravi Silva, Luisa Petti
Summary: A unique ridge-structured device capable of sensing a wide range of forces, from low forces to high forces, is reported. The device is composed of a thermoplastic polyurethane layer sandwiched between two textured silicon elastomeric layers. The optimized device shows a maximum peak output power and current densities of 490 mW m(-2) and 1750 μA m(-2), respectively, at 30 N and 7 Hz of compressive forces. The proposed device exhibits stable electrical output for 10000 cycles and can be used as wearable sensors for monitoring pulse rate, breath patterns, and gait movements.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Energy & Fuels
W. Hashini K. Perera, Mateus G. Masteghin, Hongjae Shim, Joshua D. Davies, Joshua L. Ryan, Steven J. Hinder, Jae S. Yun, Wei Zhang, K. D. G. Imalka Jayawardena, S. Ravi P. Silva
Summary: By using alumina nanoparticles (Al2O3 NPs) to improve the wettability of the perovskite precursor on Me-4PACz, researchers have achieved higher device yield and a champion power conversion efficiency of 19.9%, which is a 20% improvement compared to devices fabricated on PFN-Br-modified Me-4PACz.
Article
Chemistry, Multidisciplinary
Ming Liu, Ryosuke Senga, Masanori Koshino, Yung-Chang Lin, Kazu Suenaga
Summary: Bilayer graphene exhibits both local and global properties, and through electron energy loss spectroscopy, we have discovered its internal local properties and variations in the core-level van Hove singularity peaks.
Article
Chemistry, Multidisciplinary
Yusuke Nakanishi, Shinpei Furusawa, Yuta Sato, Takumi Tanaka, Yohei Yomogida, Kazuhiro Yanagi, Wenjin Zhang, Hiroshi Nakajo, Soma Aoki, Toshiaki Kato, Kazu Suenaga, Yasumitsu Miyata
Summary: The structural diversity and chemical variations of single-walled transition metal dichalcogenide nanotubes templated by boron nitride nanotubes are reported. This template reaction provides a universal platform for studying the chirality-dependent properties of one-dimensional nanotubes with different electronic structures.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Ehsan Rezaee, Dimitar I. Kutsarov, Jing Zhang, George Koutsourakis, Bowei Li, Fernando A. Castro, S. Ravi P. Silva
Summary: There is an increasing demand for development of environmentally friendly inks for perovskite-based thin film functional layers. Most perovskite precursors currently used rely on highly toxic solvents, so there is a need for greener inks to facilitate commercialization. Four perovskite precursors were studied, some containing up to 90% ethanol, and high-quality multi-crystalline perovskite layers were successfully fabricated. Large-area photoluminescence imaging was used to improve film quality and enhance deposition uniformity. The development of greener perovskite inks showed great potential, with solar cells fabricated achieving power conversion efficiencies above 19.5%.
Article
Chemistry, Physical
Xiaoyi Hu, Kangli Liu, Shijie Zhang, Guosheng Shao, S. Ravi P. Silva, Peng Zhang
Summary: In this study, a PVDF-HFP/GN GPE with high ionic conductivity, high-temperature resistance, and flame-retardancy was prepared. By regulating the distribution of lithium ions and protecting lithium anodes, the safety and electrochemical performance of lithium metal batteries (LMBs) were improved.
Article
Materials Science, Biomaterials
Swati Panda, Sugato Hajra, Hang Gyeom Kim, Haejin Jeong, P. G. R. Achary, Seonki Hong, Bhaskar Dudem, S. Ravi P. Silva, Venkateswaran Vivekananthan, Hoe Joon Kim
Summary: This article introduces a biodegradable sensor system based on TENG, which can detect biological elements in remote areas. The sensor detects E. coli using a carbohydrate-protein interaction mechanism and monitors the output current to determine the bacterial concentration. The study also tests the degradability and long-term reliability of the sensor. Overall, this article is rated 8 out of 10.
JOURNAL OF MATERIALS CHEMISTRY B
(2023)
Article
Chemistry, Physical
Shiming Chen, Kai Yang, Hengyao Zhu, Jianan Wang, Yi Gong, Huanxin Li, Manman Wang, Wenguang Zhao, Yuchen Ji, Feng Pan, S. Ravi P. Silva, Yunlong Zhao, Luyi Yang
Summary: This study proposes an efficient catalyst design and synthesis strategy for lithium-CO2 batteries, which converts Pt into 3D porous Pt catalyst with preferred crystal orientation. The catalyst exhibits enhanced CO2 conversion kinetics and superior electrochemical performance. The demonstration of a proof-of-concept stack Li-CO2 pouch cell showcases the potential for large-scale operations.
Article
Materials Science, Multidisciplinary
Guilherme K. Maron, Mateus G. Masteghin, Veridiana Gehrke, Lucas S. Rodrigues, Jose H. Alano, Jessica H. H. Rossato, Valmor Roberto Mastelaro, Jairton Dupont, Marcia Tsuyama Escote, S. Ravi P. Silva, Neftali Lenin Villarreal Carreno
Summary: This study demonstrates an enhanced fabrication technique using CO2 infrared lasers to pattern micro-supercapacitor electrodes. The direct-written laser-induced graphene (LIG) micro-supercapacitors with NiCo2S4 nanoparticles exhibited outstanding properties, including high specific capacitance and energy density, as well as excellent capacitance retention and flexibility. These findings suggest the potential use of LIG/NiCo2S4 MSC in the next generation of flexible and miniaturized portable devices.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Materials Science, Multidisciplinary
Zakaria Saadi, Simon G. King, Jose Anguita, Vlad Stolojan, S. Ravi P. Silva
Summary: Thermoelectric materials offer a promising solution for recovering wasted energy, but their efficiency is low and the best materials are brittle, toxic, and expensive. This study demonstrates that flexible films of double-walled carbon nanotubes can achieve low thermal conductivity and high electrical conductivity, leading to the development of flexible, cheaper, and more efficient thermoelectric generators.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
