Article
Chemistry, Multidisciplinary
John Bulmer, Michelle Duran-Chaves, Daniel M. Long, Jeremiah Lipp, Steven Williams, Mitchell Trafford, Anthony Pelton, Jared Shank, Benji Maruyama, Lawrence F. Drummy, Matteo Pasquali, Hilmar Koerner, Timothy Haugan
Summary: A mechanically robust wire formed by self-assembled fullerene supramolecules between carbon nanotube bundles is presented, where the internal crystal structure and outer surface of the supramolecules are aligned and dispersed with the CNT bundles. Crucial production processes, such as fullerene concentration and postprocess annealing, impact the crystallinity, crystal dimensions, and other structural features of the fullerene supramolecular network. The addition of networked fullerenes at low concentrations enhances the mechanical strength of the CNT wire, and the novel mutually aligned and networked fullerene supramolecules form a bulk self-supporting architecture.
Article
Chemistry, Physical
Tao Chen, Sha Yang, Qinzhen Li, Yongbo Song, Guang Li, Jinsong Chai, Manzhou Zhu
Summary: Hierarchical assemblies of a new silver nanocluster, Ag-70-TPP, have been synthesized and characterized, showing a highly space-efficient double helical 4H close packing pattern directed by ligands. The chirality of Ag-70-TPP and van der Waals forces interactions between ligands play a key role in driving its arrangement, with observed interlocking of phosphine ligands contributing to the structure. This work provides important and unprecedented insights into the internal structure and crystallographic arrangement of nanoclusters.
NANOSCALE HORIZONS
(2021)
Article
Chemistry, Multidisciplinary
Zhilin Liu, Hailong Xiong, Yaxiao Luo, Liangliang Zhang, Kuo Hu, Ling Zhang, Yu Gao, Zhen-An Qiao
Summary: An interface-induced self-assembly strategy was developed to synthesize ordered mesoporous carbon/Ti3C2Tx heterostructures with high specific surface areas and excellent thermodynamic stability. These heterostructures exhibited superior performance as electrode materials for supercapacitors.
Article
Nanoscience & Nanotechnology
Eunhwan Jo, Yong-Bok Lee, Yohan Jung, Su-Bon Kim, Yunsung Kang, Min-Ho Seo, Jun-Bo Yoon, Jongbaeg Kim
Summary: The study introduces highly reliable microelectromechanical switches using nanocomposites, with a combination of gold nanoparticles and carbon nanotubes to increase the effective contact area and provide low contact resistance current paths, allowing for robust switching operations under hot-switching conditions.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Ning Gao, Fengmei Wang, Jianwei Ding, Marshet G. Sendeku, Peng Yu, Xueying Zhan, Shuangfei Cai, Chunhui Xiao, Rong Yang, Jun He, Zhenxing Wang
Summary: In this study, a two-dimensional AuNP-in-PdNS electrocatalyst was designed to reduce CO2 to formate acid under a wide potential window, using Au nanoparticles intercalated in Pd nanosheets. The intercalated Au nanoparticles effectively prevented CO formation and promoted formate production on the surface of Pd nanosheets by regulating its electronic structure.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Huan Ma, Siyue Xu, Yang Gao, Wei Liu, Xiaoxiao Wei, Mohamed Amine Aouraghe, Fujun Xu
Summary: This study demonstrated an innovative physical strategy of wet cryogenic treatment to improve the properties of porous CNT assembly, leading to enhanced tensile strength, toughness, and strain sensitivity.
Article
Nanoscience & Nanotechnology
Pengyingkai Wang, Ya Feng, Rong Xiang, Taiki Inoue, Anton Anisimov, Esko Kauppinen, Shohei Chiashi, Shigeo Maruyama
Summary: The thermal properties of individual single-walled carbon nanotubes have been extensively studied, but the thermal transport in assembled structures depends on bundling and inner structural details. Experimental measurements of SWCNT bundle thermal conductivities were used to understand bundling effects, leading to a phenomenological model for thermal transport in SWCNT films. This model was extended to explain thermal transport in one-dimensional van der Waals heterostructures, showing that the transparency of the film affects the overall performance.
Review
Engineering, Biomedical
Eduardo Anaya-Plaza, Ahmed Shaukat, Inka Lehtonen, Mauri A. Kostiainen
Summary: The strategy of combining biomolecules and synthetic components to develop biohybrids is becoming increasingly popular for preparing highly customized and biocompatible functional materials， allowing the excellent properties of carbon nanotubes (CNTs) to be applied to biomedical applications. The resulting well-defined composites of CNTs conjugated with relevant biomolecules enable the exploitation of nanoscale properties at the micro- and macroscale, with potential applications in tissue engineering, sensors, and wearable electronics. This review presents the underlying chemistry behind the CNT-based biohybrid materials and discusses the future directions of the field.
ADVANCED HEALTHCARE MATERIALS
(2021)
Article
Physics, Multidisciplinary
Asef Kheirandish, Nasser Sepehri Javan, Afsoon Farhoomand, Roshanak Etemadpour
Summary: By using a Drude-like model for conduction electrons in Metal Nanoparticles (MNPs) and considering dipole-dipole interactions of adjacent particles, an analytical expression for the MNP permittivity is obtained. It is found that the interaction between MNPs leads to an increase in extinction cross section, a red-shift of Surface Plasmon Resonance (SPR) wavelength, and a decrease in the complex permittivity values.
Review
Chemistry, Multidisciplinary
Sofie Cambre, Ming Liu, Dmitry Levshov, Keigo Otsuka, Shigeo Maruyama, Rong Xiang
Summary: 1D van der Waals heterostructures based on carbon nanotube templates offer exciting possibilities for creating new optical and electronic properties. By engineering the characteristics of these heterostructures through controlling their diameter and chiral structure, they can be integrated into a wide range of applications with custom-built properties.
Article
Nanoscience & Nanotechnology
Lenan Zhang, Yang Zhong, Xin Qian, Qichen Song, Jiawei Zhou, Long Li, Liang Guo, Gang Chen, Evelyn N. Wang
Summary: This study investigates the impact of vdW binding effects on heat conduction, and through atomistic simulations and device-level optimization, identifies a key region for achieving maximal heat dissipation in two-dimensional heterostructures.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Yunxiang Bai, Mingquan Zhu, Shijun Wang, Luqi Liu, Zhong Zhang
Summary: This study investigates the dynamic electrical failure behavior and mechanism of carbon nanotube ribbons through experiments and theoretical calculations, and demonstrates the significant impact of electrical stress rates on failure resistance. It suggests the establishment of a uniform standard for ampacity testing method.
Article
Nanoscience & Nanotechnology
Woomin Park, Hyeonseok Hwang, Sohee Kim, Sungbin Park, Kwang-Suk Jang
Summary: Thermoelectric carbon nanoparticle-carbon nanotube heterostructures were introduced as a promising flexible thermoelectric material, with optimized barrier energy and controlled work function of CNPs for improved thermoelectric performance. The optimized heterostructures demonstrated enhanced Seebeck coefficient and power factor, showing potential for application in thermoelectric generators.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Jiapeng Zhang, Dejun Zhu, Sheng Zhang, Hao Cheng, Shuanglu Chen, Rujun Tang, Zhi Hong Hang, Tianhui Zhang, Xiaohua Zhang, Zhaohui Yang
Summary: In this study, a flexible Ni@CNTS/CNTS/PDMS composite with a designed asymmetric structure is reported to exhibit a unidirectional EMI shielding performance with controlled magnetic permeability, conductivity, and enhanced mechanical property. The material shows high EMI shielding effectiveness in the X band with low reflection loss.
Review
Energy & Fuels
Yanzhi Cai, Yuhan Wang, Laifei Cheng, Siyu Guo, Tingting Liu, Zhongyi Hu, Haiming Yu, Dengpeng Chen, Yanjun Li, Hudie Yuan
Summary: This paper summarizes the application of carbon nanotubes (CNTs) in the field of flexible electrodes, including the use of CNTs as active materials growing in situ in other flexible substrates and as flexible skeletons to grow other active materials. The effects of composition and structure on the flexible electrode materials are discussed, and the design and assembly modes of different structures of flexible supercapacitors (FSCs) are introduced. In addition, the future development of CNT flexible electrodes and FSCs composed of CNT composite flexible electrodes is discussed.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Multidisciplinary
Jack W. Jordan, Alexander Chernov, Graham A. Rance, E. Stephen Davies, Anabel E. Lanterna, Jesum Alves Fernandes, Alexander Gruneis, Quentin Ramasse, Graham N. Newton, Andrei N. Khlobystov
Summary: Boron nitride nanotubes (BNNTs) are highly effective nanocontainers for polyoxometalate (POM) molecules, with spontaneous encapsulation from aqueous solution and Lewis acid-base interactions likely driving the process. Extensive investigation of the guest-molecules revealed energy and electron transfer processes between BNNTs and POMs, leading to various phenomena such as quenching of BNNT photoluminescence, emergence of new photoluminescence emissions, photochromic response, and paramagnetic signals from guest-POMs. These findings provide a fresh perspective on nanoscale host-guest interactions and open pathways for harnessing the functional properties of hybrid systems.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Microscopy
Kayleigh L. Y. Fung, Benjamin L. Weare, Michael W. Fay, Stephen P. Argent, Andrei N. Khlobystov
Summary: The reactivity of a series of related molecules under the 80 keV electron beam was studied and correlated with their structures and chemical composition. The stability of the molecules was found to depend on their degree of hydrogenation or halogenation. Fully halogenated molecules were the most stable, while semi-halogenated molecules were the least stable due to the elimination of H-X and subsequent polymerization. The presence of water molecules in the crystal lattice significantly decreased the stability of the semi-fluorinated molecules.
Article
Chemistry, Multidisciplinary
Matthew D. Wadge, Matthew A. Bird, Andrzej Sankowski, Hannah Constantin, Michael W. Fay, Timothy P. Cooper, James N. O'Shea, Andrei N. Khlobystov, Darren A. Walsh, Lee R. Johnson, Reda M. Felfel, Ifty Ahmed, David M. Grant
Summary: This study investigates the chemical conversion and heat treatment of Ti6Al4V microspheres for their electrocatalytic properties. The wet-chemical conversion with sodium hydroxide and heat treatment at 450 degrees C are found to stabilize the surface of the microspheres and change the mechanism of the oxygen reduction reaction. The study explores a design strategy for new electrocatalyst materials by maintaining the microspherical nature of the material and tuning its surface.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
William J. Cull, Stephen T. Skowron, Ruth Hayter, Craig T. Stoppiello, Graham A. Rance, Johannes Biskupek, Zakhar R. Kudrynskyi, Zakhar D. Kovalyuk, Christopher S. Allen, Thomas J. A. Slater, Ute Kaiser, Amalia Patane, Andrei N. Khlobystov
Summary: In this study, single-layer, ultrathin, subnanometer-wide indium selenides (InxSey) were synthesized using templated growth inside single-walled carbon nanotubes (SWCNTs). The phase of the encapsulated material was identified through experimental analysis and simulations, and the identities of the encapsulated species were confirmed using various analytical techniques. These materials have the potential for applications in nanoelectronic components.
Article
Chemistry, Organic
Gitali Devi, Adam K. Hedger, Richard J. Whitby, Jonathan K. Watts
Summary: We discovered a new reactivity for the inverse electron demand Diels-Alder (iEDDA) reaction between norbornene and tetrazine, where dimeric products were preferentially formed. An olefinic intermediate formed after the addition of the first tetrazine unit to norbornene rapidly undergoes a consecutive cycloaddition reaction with a second tetrazine unit to result in a conjugate with a 1:2 stoichiometric ratio. This unexpected dimer formation was consistently observed in various reactions, including small-molecule norbornenes, tetrazines, and oligonucleotide conjugates. When norbornene was replaced with bicyclononyne, the reactions resulted exclusively in rapid formation of the expected 1:1 stoichiometric conjugates.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Jack W. Jordan, Beth Mortiboy, Andrei N. Khlobystov, Lee R. Johnson, Graham N. Newton, Darren A. Walsh
Summary: Understanding ion transport in solid materials is crucial for the design of electrochemical devices. This study focuses on investigating ion transport across atomically thin structures using a host-guest hybrid redox material based on polyoxometalates (POMs) encapsulated within single-walled carbon nanotubes (SWNTs). The nanotube sidewall acts as a barrier between the redox-active molecules and bulk electrolytes, allowing for the characterization of ion transport through electrochemical methods. The findings highlight the importance of the nature of the cation in the supporting electrolyte and the role of proton transport in the redox chemistry of nanoconfined redox materials.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Jonathan Bradford, Tin S. Cheng, Tyler S. S. James, Andrei N. Khlobystov, Christopher J. Mellor, Kenji Watanabe, Takashi Taniguchi, Sergei Novikov, Peter H. Beton
Summary: The integration of graphene and hexagonal boron nitride (hBN) in lateral heterostructures allows for engineering the material properties through quantum confinement or introduction of novel electronic and magnetic states at the interface.In this study, graphene nanoribbons(GNRs) passivated by hBN were grown via high-temperature molecular beam epitaxy (HT-MBE) on pre-etched hBN trenches.High-resolution atomic force microscopy(AFM) showed that GNRs grew epitaxially and formed a network passivated by hBN.It was observed using conductive AFM that quasiparticle interference patterns caused by intervalley scattering at the graphene/hBN interface had implications for the potential transport characteristics of hBN passivated GNR devices.
Article
Chemistry, Multidisciplinary
Camilla Russo, Greta Donati, Francesco Giustiniano, Jussara Amato, Luciana Marinelli, Richard John Whitby, Mariateresa Giustiniano
Summary: The ability of aromatic isocyanides to harvest visible light and promote the generation of alkyl and acyl radicals from various radical precursors has sparked renewed interest in the development of green photoredox catalytic methodologies. Mechanistic studies involving UV-visible absorption and fluorescence experiments, electrochemical measurements, and computational calculations provide key insights for the rational design of new isocyanide-based organic photoredox catalysts. Furthermore, this study demonstrates the green potential of the investigated chemistry by enabling direct and easy access to deuterium labeled compounds.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Ilya Popov, Sadegh Ghaderzadeh, Emerson C. Kohlrausch, Luke T. Norman, Thomas J. A. Slater, Gazi N. Aliev, Hanan Alhabeadi, Andre Kaplan, Wolfgang Theis, Andrei N. Khlobystov, Jesum Alves Fernandes, Elena Besley
Summary: This work provides a comprehensive guidance on increasing the degree of atomization of metal catalysts by selecting appropriate experimental conditions and supports. It is based on a rigorous macro-kinetic theory that captures competing processes of nucleation and formation of single atoms stabilized by point defects. The effects of metal-support interactions and deposition parameters on the ratio of single atom to nanocluster, as well as the role of metal centers formed on point defects in nucleation kinetics, have been established, paving the way for guided synthesis of single atom catalysts. Experimental results on sputter deposition of Pt on exfoliated hexagonal boron nitride, imaged by aberration-corrected scanning transmission electron microscopy, support these predictions.
Article
Chemistry, Multidisciplinary
Bradley T. Flinn, Valentin Radu, Michael W. Fay, Ashley J. Tyler, Jem Pitcairn, Matthew J. Cliffe, Benjamin L. Weare, Craig T. Stoppiello, Melissa L. Mather, Andrei N. Khlobystov
Summary: Spin-active nanomaterials are crucial in quantum technologies such as spintronics and data storage. This study combines NV spin-active defects in diamond and an electron beam to probe the functional magnetic properties of nanoparticles. The results demonstrate perturbation of NV spins by neighboring electron spins and provide insights into sensing magnetic materials encapsulated in nanostructures. These findings advance the development of quantum technologies and solid-state NV sensing.
NANOSCALE ADVANCES
(2023)
Article
Chemistry, Physical
Jose Pinto, Andreas Weilhard, Luke T. Norman, Rhys W. Lodge, David M. Rogers, Aitor Gual, Israel Cano, Andrei N. Khlobystov, Peter Licence, Jesum Alves Fernandes
Summary: In this study, mono- and bi-metallic nanoparticles were fabricated and used as catalysts in hydrogenation reactions in an ionic liquid. The bi-metallic nanoparticles exhibited enhanced catalytic performance and higher stability compared to the mono-metallic nanoparticles. Through a kinetic model and electron microscopy imaging, it was found that PdAu had a lower deactivation rate and better stability, making it suitable for designing high-performance catalysts.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
John Luke Woodliffe, Jesus Molinar-Diaz, Md Towhidul Islam, Lee A. Stevens, Matthew D. Wadge, Graham A. Rance, Rebecca Ferrari, Ifty Ahmed, Andrea Laybourn
Summary: Magnetic framework composites (MFCs) are an interesting class of materials that combine metal-organic frameworks (MOFs) with magnetic materials. This study presents the synthesis of highly porous magnetic microspheres using a flame-spheroidisation method. The microspheres were then functionalised and used as a scaffold for the growth of MOFs, resulting in macro-micro hierarchically porous MFCs.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Kayleigh L. Y. Fung, Stephen T. Skowron, Ruth Hayter, Stephen E. Mason, Benjamin L. Weare, Nicholas A. Besley, Quentin M. Ramasse, Christopher S. Allen, Andrei N. Khlobystov
Summary: In this study, experimental methodologies utilizing transmission electron microscopy (TEM) were used to investigate reaction kinetics at the single molecule level. By observing the reactions of perchlorocoronene (PCC) in nanotubes of different diameters and temperatures, it was found that there was a period of molecular movement preceding intermolecular addition of PCC. The reaction rate was found to depend more on the nanotube diameter than on the reaction temperature.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
