Article
Energy & Fuels
Myeong-Hun Jo, Hyo-Jin Ahn
Summary: In this study, a highly dispersed single-wall carbon nanotube (HD-SWCNT) thin film was introduced on a WO3 film using ultrasonic spray coating method to accelerate electron and Li-ion transport. The HD-SWCNT thin film exhibited excellent electrical properties and enhanced Li-ion diffusion kinetics, resulting in improved electrochemical activity and energy-storage performances of the electrode. The HD-SWCNT/WO3 electrode showed remarkable high-rate capability and ultrafast charge/discharge characteristics, making it a promising strategy for ultrafast multi-functional electrochemical devices.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Chao Chen, Yi-Ming Zhao, Hai-Long Yu, Xin-Yu Jiao, Xian-Gang Hu, Xin Li, Peng-Xiang Hou, Chang Liu, Hui-Ming Cheng
Summary: Bolometric photodetectors based on single-wall carbon nanotubes (SWCNTs) have advantages of ul-trawide absorption spectrum, high charge carrier mobility, good processability, and high mechanical flexibility. However, their detection performance needs improvement. We fabricated a flexible infrared photodetector based on high quality SWCNT films. The device exhibited an ul-trahigh detectivity and a short response time. The photocurrent response of the detector was influenced by the structure of the SWCNT network.
Article
Chemistry, Multidisciplinary
Lili Zhang, Ziwei Xu, Tian-liang Feng, Maoshuai He, Thomas Willum Hansen, Jakob Birkedal Wagner, Chang Liu, Hui-Ming Cheng
Summary: This study uses environmental transmission electron microscopy to observe for the first time the breaking of symmetry during the growth of a single-wall carbon nanotube. It reveals the role of topological defects and the importance of the tube-catalyst interface.
Article
Nanoscience & Nanotechnology
George Karalis, Lazaros Tzounis, Evangelos Dimos, Christos K. Mytafides, Marco Liebscher, Andreas Karydis-Messinis, Nikolaos E. Zafeiropoulos, Alkiviadis S. Paipetis
Summary: This study presents the design and fabrication of novel printed single-wall carbon nanotube electrothermal Joule heating devices, which are integrated into carbon fiber reinforced polymer composite laminates to provide multifunctionality with efficient and stable performance. The devices demonstrate efficient out-of-oven curing of thermoset matrix and provide additional functions such as deicing and self-sensing, making them suitable for applications in energy and transport sectors. The modular design also allows for large-area applications via interconnected arrays of printed devices.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Optics
Dalin Sun, Jihong Pei, Lang Sun, Shaowen Chu, Xintong Xu, Shuangchen Ruan
Summary: Researchers reported a wide-band single-walled carbon nanotube (SWCNT) saturable absorber (SA) fabricated in the one-dimensional nanochannels of ZnAPO4-5 (AFI) zeolite single crystals. The synthesized SA could be used for Q-switched operation in ytterbium- and thulium-doped fiber lasers at different wavelengths. The SWCNT@AFI crystal exhibited excellent anisotropic optical properties and was suitable for short-duration pulsed fiber lasers.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Ramesh Jayaraman, Andrew G. Rinzler
Summary: The use of a dual pulsed laser vaporization (DPLV) system in the synthesis of single-wall carbon nanotubes (SWCNT) revealed that the high material purities reported in early experiments, which were originally attributed to reaction volume confinement, were in part due to an unrecognized source of silicon. The inclusion of Si in the synthesis process correlated with an enhancement in product purity, as demonstrated through spectroscopic analysis. This finding suggests that the inclusion of Si may be beneficial in other methods of SWCNT production.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Physical
Mochen Li, Kotaro Yasui, Hisashi Sugime, Suguru Noda
Summary: This study highlights the importance of maintaining a highly reductive atmosphere during annealing to achieve active catalyst particles with a higher number density and longer lifetime. Fe particles can be partially oxidized during annealing in a mildly oxidative CO2 environment, affecting the bulk diffusion of Fe into the AlOx layer. On the other hand, Fe remains active for SWCNT growth when reduced sufficiently in H-2 without CO2.
Article
Chemistry, Multidisciplinary
R. Tormo-Queralt, C. B. Moller, D. A. Czaplewski, G. Gruber, M. Cagetti, S. Forstner, N. Urgell-Olle, J. A. Sanchez-Naranjo, C. Samanta, C. S. Miller, A. Bachtold
Summary: Researchers have developed a reliable process to fabricate multielectrode circuits that can withstand harsh conditions of nanotube growth. High-quality charge stability diagrams of double and triple quantum dots have been measured, and long-range tunneling of electrons between the quantum dots has been observed. This work paves the way for the realization of a new generation of condensed-matter devices in an ultraclean environment.
Article
Chemistry, Physical
Qing Li, Qingzhi Liu, Mengjiao Guan, Huiting Zhang, Dengfeng Yang
Summary: This study used simulation to investigate the transport of water and ions in different-size interstices, and improved the salt rejection performance through modification. The results showed that the modified outer wall carbon nanotube membrane achieved high desalination with high water flux.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Sho Kuromatsu, Takeshi Watanabe, Yoshiyuki Nonoguchi, Tsuyoshi Kawai, Shinji Koh
Summary: A transfer technique was proposed to apply SWCNT films to flexible electronic devices, showing high flexibility and electrical conductivity. The transferred films were free from Fe residues and the remaining Cu residues did not affect electrical conduction. This method provides potential for further application in flexible electronic devices.
Article
Materials Science, Multidisciplinary
Xiaonan Wang, Dianzhen Wang, Shuailing Ma, Xinran Dong, Kaixuan Rong, Cun You, Fei Wang, Haibo Li, Dongfei Li, Qiang Tao, Pinwen Zhu
Summary: Breaking the contradictory of hardness and toughness in B4C is still a challenge. Composite B4C with carbon nanotubes (CNTs) improves toughness, but has limitations. In this study, inner compressive stress is introduced in B4C composite with single-walled carbon nanotube bundles (B4C-SWNTb) by high pressure and high temperature. The resulting B4C-2 vol% SWNTb composites possess optimal hardness and fracture toughness, 3.3 times higher than pure B4C.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Kunhua Lei, Sergei M. Bachilo, R. Bruce Weisman
Summary: Time-resolved fluorescence spectroscopy was used to investigate the displacement of adsorbed SDS from SWCNT surfaces by short strands of single-stranded DNA. The displacement rate showed a strong kinetic dependence on the oligomer length and SWCNT diameter. A two-step kinetic model was proposed to explain the findings, which involved the disruption of the original SDS coating and the conformational relaxation of ssDNA on the nanotube surface.
Article
Chemistry, Multidisciplinary
Gideon Oyibo, Thomas Barrett, Sharadh Jois, Jeffrey L. Blackburn, Ji Ung Lee
Summary: This study presents an all-semiconducting single-walled carbon nanotube device with a tandem geometry that models the process of photosynthesis. By separating the light absorption and power generation processes using distinct chirality and bandgap single-walled carbon nanotubes, the device captures photons from multiple regions of the solar spectrum and enhances the photoresponse.
Review
Chemistry, Physical
Andrey Baydin, Fuyang Tay, Jichao Fan, Manukumara Manjappa, Weilu Gao, Junichiro Kono
Summary: This article discusses the applications of carbon nanotubes in quantum technology. Carbon nanotubes possess one-dimensional electronic states, excitons, and phonons, which make them suitable for developing quantum devices with high operating temperatures. The article covers the fundamental properties of carbon nanotubes, their growth and purification methods, and methodologies for assembling them into structures that exhibit macroscopic quantum properties. Most importantly, recent developments and proposals for quantum information processing devices based on individual and assembled nanotubes are reviewed.
Article
Chemistry, Multidisciplinary
Lina Tizani, Yawar Abbas, Ahmed Mahdy Yassin, Baker Mohammad, Moh'd Rezeq
Summary: An optical rectenna was presented by engineering a rectifying diode between a metal probe of an AFM and a SWCNT acting as a nano-antenna. The study demonstrated the sensitivity of CNT-based rectenna to light and its potential applications in optical communication and energy harvesting systems.
Article
Physics, Applied
Artem Kononov, Martin Endres, Gulibusitan Abulizi, Kejian Qu, Jiaqiang Yan, David G. Mandrus, Kenji Watanabe, Takashi Taniguchi, Christian Schonenberger
Summary: WT e 2 exhibits rich topological properties in different forms, and the emergence of superconductivity at its interface with normal metal suggests a possible origin due to the formation of flatbands. By studying its superconductivity in a magnetic field, parameters such as coherence length and London penetration depth can be obtained, with a critical in-plane magnetic field exceeding the Pauli limit indicating a non-trivial nature of the superconducting state.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Physics, Applied
Balint Fulop, Albin Marffy, Endre Tovari, Mate Kedves, Simon Zihlmann, David Indolese, Zoltan Kovacs-Krausz, Kenji Watanabe, Takashi Taniguchi, Christian Schoenenberger, Istvan Kezsmarki, Peter Makk, Szabolcs Csonka
Summary: Interlayer coupling is crucial for the properties of van der Waals heterostructures, strongly depending on the interlayer distance. By conducting transport measurements in piston-cylinder hydrostatic pressure cells, the interlayer coupling can be tuned, while a hexagonal boron nitride capping layer provides protection against pressure medium interference.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Mehdi Ramezani, Ian Correa Sampaio, Kenji Watanabe, Takashi Taniguchi, Christian Schonenberger, Andreas Baumgartner
Summary: The study demonstrates the use of superconducting vertical interconnect access (VIA) contacts to a monolayer of molybdenum disulfide (MoS2), with MoRe as the contact material, showing electron transport dominated by a single superconductor/normal conductor junction with a clear superconductor gap. Additionally, strongly coupled MoS2 regions to the superconductor exhibit resonant Andreev tunneling and junction-dependent gap characteristics, indicating a superconducting proximity effect.
Article
Physics, Multidisciplinary
Lujun Wang, Andreas Baumgartner, Peter Makk, Simon Zihlmann, Blesson Sam Varghese, David I. Indolese, Kenji Watanabe, Takashi Taniguchi, Christian Schoenenberger
Summary: Mechanically distorting a crystal lattice can engineer the electronic and optical properties of a material, such as introducing a scalar potential in graphene. This method provides a new way to manipulate the optical and electronic properties of materials by using external strain.
COMMUNICATIONS PHYSICS
(2021)
Article
Energy & Fuels
P. Sanchez-Pastor, A. Obermann, T. Reinsch, T. Agustsdottir, G. Gunnarsson, S. Tomasdottir, V. Hjorleifsdottir, G. P. Hersir, K. Agustsson, S. Wiemer
Summary: The study demonstrates that ambient seismic noise tomography can be used as a geothermal exploration tool, showing excellent correlation with resistivity modeling. There is a significant seismic velocity reduction to the south of Hverahlio, where the most powerful boreholes in the region are located.
Article
Green & Sustainable Science & Technology
Thomas M. P. Ratouis, S. O. Snaebjornsdottir, Martin J. Voigt, Bergur Sigfusson, Gunnar Gunnarsson, Edda S. Aradottir, Vala Hjorleifsdottir
Summary: The Carbfix 2 project demonstrates the cost effectiveness and technical maturity of capturing CO2 and H2S emissions from geothermal power plants and permanently storing them in basalt through in-situ mineralization. Field scale transport models are used to characterize the storage reservoir and evaluate the behavior of solutes. The study confirms the effectiveness of in-situ mineralization and predicts the future electricity generation decline and storage capacity of the reservoir.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2022)
Editorial Material
Chemistry, Physical
Christian Schonenberger
Summary: The exceptional quality of hexagonal boron nitride crystals allows for the creation of ultrathin dielectrics, enabling the development of ultrasmall capacitors with large capacitances. By utilizing these capacitors, the superconducting transmon qubit can be scaled down by orders of magnitude.
Article
Physics, Applied
M. Wyss, K. Bagani, D. Jetter, E. Marchiori, A. Vervelaki, B. Gross, J. Ridderbos, S. Gliga, C. Schonenberger, M. Poggio
Summary: This article introduces a scanning probe that combines magnetic and thermal imaging capabilities, achieving high field sensitivity and nanometer-scale spatial resolution. By fabricating a nanometer-scale SQUID at the apex of the probe, a sensor with an effective diameter of 365 nm, field sensitivity of 9.5 nT/root Hz, and thermal sensitivity of 620 nK/root Hz is obtained, operating in magnetic fields up to 1.0 T. The resulting SQUID-on-lever probe, resembling an atomic force microscope, expands the possibilities of sensitive nanometer-scale magnetic and thermal imaging.
PHYSICAL REVIEW APPLIED
(2022)
Article
Materials Science, Multidisciplinary
Martin Endres, Artem Kononov, Michael Stiefel, Marcus Wyss, Hasitha Suriya Arachchige, Jiaqiang Yan, David Mandrus, Kenji Watanabe, Takashi Taniguchi, Christian Schoenenberger
Summary: The diffusion of Pd into WTe2 and the formation of superconducting PdTex have been found to be the origin of the observed superconductivity. An atomically sharp interface is formed between the diffusion crystal and its host crystal, providing state-of-the-art superconducting contacts to a topological insulator. The diffusion is discovered to be nonuniform along the width of the WTe2 crystal, with a greater extent along the edges compared to the bulk. The potential of this contacting method is highlighted in transport measurements on Josephson junctions.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Multidisciplinary Sciences
Arunav Bordoloi, Valentina Zannier, Lucia Sorba, Christian Schoenenberger, Andreas Baumgartner
Summary: Correlations are fundamental to many-body systems, but are notoriously difficult to assess experimentally on a microscopic scale. This study reports the direct measurement of spin cross-correlations between currents in a Cooper pair splitter. Using ferromagnetic split-gates to individually spin polarize the transmissions of quantum dots, the study finds negative spin cross-correlations consistent with spin singlet emission.
Article
Chemistry, Multidisciplinary
Martin Endres, Artem Kononov, Hasitha Suriya Arachchige, Jiaqiang Yan, David Mandrus, Kenji Watanabe, Takashi Taniguchi, Christian Schoenenberger
Summary: In this study, we measured a 4N-periodic switching current through an asymmetric SQUID formed by the higher-order topological insulator WTe2. We found that a high asymmetry in critical current and negligible loop inductance alone were not sufficient to reliably measure the current-phase relation. Instead, we discovered that our measurement was heavily influenced by additional inductances originating from the self-formed PdTex inside the junction. We developed a method to numerically recover the current-phase relation and found that the 1.5 μm long junction was best described in the short ballistic limit. Our results highlight the complexity of subtle inductance effects that can lead to misleading topological signatures in transport measurements.
Article
Chemistry, Multidisciplinary
Paritosh Karnatak, Zarina Mingazheva, Kenji Watanabe, Takashi Taniguchi, Helmuth Berger, Laszlo Forro, Christian Schoenenberger
Summary: The study reveals that subgap excitations emerge on NbSe2 when MoS2 or hexagonal boron nitride (hBN) is used as the tunnel barrier. By investigating various heterostructure designs, the origin of these excitations is probed. Defect states at the edge of NbSe2 strongly couple to the superconductor, forming Andreev bound states. Moreover, the absence of subgap states in hBN tunnel barriers compared to the widespread presence in MoS2 tunnel barriers suggests defects in MoS2 as their origin. The magnetic nature of these excitations indicates a singlet- or a doublet-type ground state, emphasizing the role of strong spin-orbit coupling based on nearly vanishing g factors or avoided crossings.
Article
Physics, Multidisciplinary
Christian Juenger, Sebastian Lehmann, Kimberly A. Dick, Claes Thelander, Christian Schoenenberger, Andreas Baumgartner
Summary: In this experiment, tunnel spectroscopy is used to demonstrate the hybridization of superconducting subgap states in a semiconductor nanowire with superconducting reservoirs. The intermediate states, formed by the hybridization of individual bound states through a central quantum dot, ultimately connect the reservoirs carrying a Josephson current. These hybridized Andreev bound states can be seen as superconducting analogues to atomic and molecular single electron states, and provide insights for future Majorana fusion experiments.
COMMUNICATIONS PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Sung Jin An, Myung-Ho Bae, Myoung-Jae Lee, Man Suk Song, Morten H. Madsen, Jesper Nygard, Christian Schonenberger, Andreas Baumgartner, Jungpil Seo, Minkyung Jung
Summary: This study compares the adiabatic quantized charge pumping performed in two types of InAs nanowire double quantum dots, and finds that the device with well-separated side gates can achieve well-defined pump currents up to 30 MHz, in contrast to the device with closely spaced narrow bottom gates.
NANOSCALE ADVANCES
(2022)
Article
Physics, Multidisciplinary
Zoltan Scherubl, Gergo Fulop, Jorg Gramich, Andras Palyi, Christian Schonenberger, Jesper Nygard, Szabolcs Csonka
Summary: Cooper pair splitting (CPS) is a method to create spatially separated, entangled electron pairs. In this study, the spatial current correlations are experimentally characterized by tuning the tunnel barrier strength between the quantum dot and the neighboring electrode, revealing the competition between CPS and nonlocal probing of the Shiba state.
PHYSICAL REVIEW RESEARCH
(2022)
