Article
Chemistry, Physical
Chenmaya Xia, Daqi Zhang, Henan Li, Sheng Li, Haoming Liu, Li Ding, Xiyan Liu, Min Lyu, Ruoming Li, Juan Yang, Yan Li
Summary: SWNTs can be used to construct reusable SERS substrates with single molecule sensitivity and preservation of intrinsic properties, utilizing polyhedral gold nanocrystals to create effective hot spots. Using SWNTs to build SERS substrates may become a powerful strategy in various single molecule studies.
Article
Chemistry, Physical
Fei-Peng Du, Hui Zhang, Jun-An Yao, Si-Ying Chen, Jin-Kun Xiao, Ping Fu, Yun-Fei Zhang
Summary: In this study, a graphene quantum dots (GQDs) intermediate layer was used to couple poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) and single-walled carbon nanotubes (SWCNTs) to enhance the thermoelectric properties. The multilayer films showed improved interfacial adhesion, enhanced electrical conductivity, and reduced thermal conductivity, resulting in an enhanced figure of merit. The strategy employed in this study provides novel insights into high-performance SWCNTs-based thermoelectric materials.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Mathematics, Interdisciplinary Applications
Zhen Wang, Weipeng Hu
Summary: This paper investigates the resonance behavior of carbon nanotube sensors under various perturbations, exploring the dynamic stability and complex behavior of nonlinear systems in nanotube devices. Theoretical analysis and numerical simulations are used to verify the research results.
CHAOS SOLITONS & FRACTALS
(2021)
Article
Chemistry, Multidisciplinary
Timofei Eremin, Valentina Eremina, Yuri Svirko, Petr Obraztsov
Summary: Covalent functionalization of single-walled carbon nanotubes (SWCNTs) can greatly enhance their photoluminescent (PL) brightness, making them suitable for infrared light emitters.
Review
Chemistry, Multidisciplinary
Marianna V. V. Kharlamova, Christian Kramberger
Summary: This paper explores the growth mechanism, structure, growth processes, growth kinetics, and optical, vibronic and electronic properties of metallocene-filled single-walled carbon nanotubes (SWCNTs). The procedures used to fill the nanotubes are described. The doping effects on metallicity-mixed and sorted SWCNTs filled with metallocenes are investigated through various spectroscopy techniques. The modification of the electronic properties of filled SWCNTs and the applications of metallocene-filled SWCNTs in various fields are discussed.
Review
Chemistry, Multidisciplinary
Jianping Zou, Qing Zhang
Summary: Single-walled carbon nanotubes (SWCNTs) are considered a promising electronic material for the future of electronics, with sub-10 nm SWCNT-field effect transistors (FETs) outperforming Si-based FETs. Recent advances in SWCNT electronics focus on fundamental electronic structures, carrier transport mechanisms, and metal/SWCNT contact properties, highlighting subthreshold switching properties for low-power device operations. Challenges and prospects for future SWCNT-based electronics include material preparation, device fabrication, and large-scale ICs integration.
Article
Biochemistry & Molecular Biology
Matthew M. Noor, Alinne L. R. Santana-Pereira, Mark R. Liles, Virginia A. Davis
Summary: Researchers are interested in whether nanomaterials with outstanding mechanical or electrical properties also possess antibacterial properties. The study showed that the purported antibacterial activity of SWNTs may only be effective against bacteria that are sensitized by the dispersant.
Article
Materials Science, Multidisciplinary
Hao Zhang, Qiao Yan, Joseph Horvat, Roger A. Lewis
Summary: The study focused on developing a functional hydrogel with enhanced piezoresistive ability by combining SWCNT hydrogels and L-DOPA. The hybrid network showed potential for pressure-sensing applications and maintained enough free catechol groups to endow the desired properties. Various characterization techniques were utilized to study the L-DOPA-PAM-SWCNT hydrogel hybrid network.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Yang Zhang, Yuning Li, Qing You, Jingye Sun, Ke Li, Hao Hong, Lingbing Kong, Mingqiang Zhu, Tao Deng, Zewen Liu
Summary: In this paper, a 3D photodetector based on a graphene-SWCNT heterojunction is fabricated using a self-rolled-up process. The 3D microcavity structure enhances the optical field and improves the photoresponsivity compared to 2D devices. The photodetector demonstrates broadband photodetection, fast photoresponse speed, excellent sensitivity, mid-infrared detection, and room-temperature imaging capability. This 3D heterojunction photodetector provides a feasible pathway for high-performance graphene-based photodetectors and can be integrated with other light absorptive materials.
Article
Chemistry, Multidisciplinary
Yutaka Suwazono, Takuro Murayoshi, Hiroki Nagai, Mitsunobu Sato
Summary: A composite thin film of single-walled carbon nanotube/anatase was fabricated with high transmittance and scratch resistance. The film showed promising electrical and optical properties, making it suitable for applications as a photoelectrode without the need for a conductive substrate.
Article
Materials Science, Multidisciplinary
Karolina Z. Milowska, Maciej Krzywiecki, Mike C. Payne, Dawid Janas
Summary: Carbon nanomaterials such as graphene and carbon nanotubes have attracted significant interest due to their extraordinary properties, with the potential to play a key role in future applications. The sensitivity of carbon nanostructures to chemical stimuli allows for enhanced charge propagation capabilities, as seen in the impact of bromine addition on the electrical and thermoelectric properties of single-walled carbon nanotube films. Experimental results show a two orders of magnitude enhancement in thermoelectric capabilities through sonication-assisted introduction of Br2 into the SWCNT network, with computational analyses revealing the dopant's influence on electronic and charge transport properties.
MATERIALS & DESIGN
(2022)
Article
Chemistry, Physical
Ya Feng, Yuta Sato, Taiki Inoue, Ming Liu, Shohei Chiashi, Rong Xiang, Kazu Suenaga, Shigeo Maruyama
Summary: After self-bundling, the thermal conductivity of the carbon nanotube is significantly reduced, and the center temperature of the suspended nanotube increases, showing the effect of bundling on thermal conductivity.
Article
Chemistry, Physical
Javier A. B. Ramirez, Dmitry Krasnikov, Vladimir V. Gubarev, Ilya Novikov, Vladislav A. Kondrashov, Andrei Starkov, Mikhail S. Krivokorytov, Vyacheslav V. Medvedev, Yuriy G. Gladush, Albert G. Nasibulin
Summary: We propose a facile, cost-efficient, environmentally friendly, and scalable process to renew single-walled carbon nanotube membranes serving as extreme ultraviolet (EUV) protective pellicles. The method involves high-temperature treatment of the membrane to clean it without damaging the carbon nanotube structure, opening up possibilities for multiple membrane renovations.
Article
Nanoscience & Nanotechnology
Bryon W. Larson, Kira A. Thurman, Hyun Suk Kang, Andrew J. Ferguson, Jeffrey L. Blackburn, Mark Steger
Summary: The study shows dramatic changes in SWCNT sidewall defects when optically pumped in ambient conditions, leading to rapid decay in absorption and emission properties. Encapsulation or exciton quenching is an effective route for stabilizing against photodegradation.
ACS APPLIED NANO MATERIALS
(2022)
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)
Correction
Chemistry, Physical
Minhui Lee, Emiko Kazuma, Chi Zhang, Michael Trenary, Jun Takeya, Jaehoon Jung, Yousoo Kim
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Minhui Lee, Emiko Kazuma, Jaehoon Jung, Michael Trenary, Yousoo Kim
Summary: A detailed understanding of the dissociation of O-2 molecules on metal surfaces is crucial for controlling oxidation reactions and developing catalysts. Single-molecule studies using a scanning tunneling microscope provide fundamental insights into the excitation pathway for dissociation reactions.
Article
Chemistry, Multidisciplinary
Chi Zhang, Emiko Kazuma, Yousoo Kim
Summary: This study demonstrates that by introducing O-2 into a molecular system, the onsurface reaction pathways of terminal alkynes can be selectively steered from C-C coupling to C-H activation. The catalytic performance and reaction mechanisms of oxygen species in the C-H activation processes were also explored.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Multidisciplinary Sciences
Miyabi Imai-Imada, Hiroshi Imada, Kuniyuki Miwa, Yusuke Tanaka, Kensuke Kimura, Inhae Zoh, Rafael B. Jaculbia, Hiroko Yoshino, Atsuya Muranaka, Masanobu Uchiyama, Yousoo Kim
Summary: This study combines a scanning tunnelling microscope (STM) with localized plasmon fields driven by a tunable laser to directly visualize the photocurrent channels through the molecular orbitals of a single molecule at atomic-scale resolution. The direction and spatial distribution of the photocurrent were found to be sensitive to the bias voltage, and counter-flowing photocurrent channels were detected even at a voltage where the averaged photocurrent is close to zero. The competition between photoinduced electron transfer (PET) and photoluminescence was also observed, and the relaxation pathway of the excited molecule could be controlled by positioning the STM tip with three-dimensional, atomic precision.
Article
Chemistry, Physical
So-Dam Sohn, Yohan Kim, Sungchul Jung, Jeong Su Kang, Huijun Han, Kwang S. Kim, Kibog Park, Hyung-Joon Shin
Summary: We report the dark catalysis of water dissociation on a TiO2 surface using C-60 molecules as molecular electron acceptors. This method is simple and can be widely applied for tuning and enhancing the catalytic activity of various photocatalytic systems.
Article
Chemistry, Physical
D. Nikolaievskyi, M. Torregrosa, A. Merlen, S. Clair, O. Chuzel, J. -L Parrain, T. Neisus, A. Campos, M. Cabie, C. Martin, C. Pardanaud
Summary: This study demonstrates the detection of crumpling effects in Raman spectra using various types of graphene materials. The main finding is that these crumples enhance the intensity of the G band, similar to twisted bi-layer graphene. Surface defects created by crumples are included in the analysis, providing an updated understanding of point and linear defects. Additionally, the existence of 23 resonant additional bands at 633 nm is reported for the first time, attributed to edge modes formed by a high density of crumples. Raman plots are used to gain qualitative information about layer stacking.
Article
Physics, Applied
Ikufumi Katayama, Kensuke Kimura, Hiroshi Imada, Yousoo Kim, Jun Takeda
Summary: The combination of THz pulses and STM allows for the investigation of ultrafast dynamics at material surfaces with high spatial and temporal resolution. This has the potential to advance nanoscience by further combining THz-STM with scanning tunneling luminescence spectroscopy, which provides more information about nanoscale materials through luminescence spectra.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
Emiko Kazuma, Minhui Lee, Jaehoon Jung, Michael Trenary, Yousoo Kim
Summary: This study used a scanning tunneling microscope to observe molecular motion and the dissociation of O-2 molecules adsorbed on the Ag(110) surface at a single-molecule level. It demonstrated that plasmonic hot carriers can enable multiple reaction pathways due to their broad energy distribution, allowing access to various adsorbate states.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
David L. Molina, Maki Inagaki, Emiko Kazuma, Yousoo Kim, Michael Trenary
Summary: Reflection absorption infrared spectroscopy and temperature-programmed desorption experiments were carried out to investigate the properties of Pt/Cu(111) surfaces. Pt coverage on Cu(111) was varied from multilayer to 0.23 monolayer. As the Pt coverage decreased, isolated Pt atoms and Pt islands were observed, indicating the presence of Pt atoms embedded in the Cu(111) surface. Low coverages of Pt at different temperatures formed single atom alloys (SAAs) with surface Pt only present as isolated atoms replacing Cu atoms in the topmost atomic layer. Adsorption of CO on the Pt atoms of the SAAs led to red-shifted C-O stretch peaks compared to CO on Pt(111), indicating how nearby Cu atoms alter the Pt-CO bonding.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Review
Chemistry, Multidisciplinary
Raymond A. A. Wong, Yasuyuki Yokota, Yousoo Kim
Summary: Electrochemistry plays a crucial role in addressing societal issues, and understanding the nature of electrode-electrolyte interfaces is a challenge due to the thick liquid electrolyte layer. However, combined ultrahigh vacuum-electrochemistry (UHV-EC) approaches provide a way to bridge electrochemistry with UHV-based techniques by removing the electrolyte layer for analysis.
ACCOUNTS OF CHEMICAL RESEARCH
(2023)
Article
Chemistry, Physical
Yuzu Kobayashi, Yasuyuki Yokota, Yasufumi Takahashi, Jun Takeya, Yousoo Kim
Summary: Direct measurements at the solid-liquid interface on the nanometer scale provide valuable information for fundamental and applied research. In this study, a novel method was developed to fabricate an electrochemical scanning tunneling microscopy (EC-STM) probe with high reproducibility. By electrochemically depositing Au on a pyrolytic carbon formed within a glass nanopipette, a sufficient insulation was achieved, overcoming the challenges in previous EC-STM studies. The high-quality EC-STM images obtained using this probe will pave the way for advanced measurements at various solid-liquid interfaces.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Nataliya Kalashnyk, Adam Hassan Denawi, Frederic Dumur, Didier Gigmes, Xavier Bouju, Sylvain Clair
Summary: The supramolecular self-assembly of s-indacene-1,3,5,7(2H,6H)-tetrone on the Cu(111) surface was investigated and six different phases were found, driven by different interactions. Host-guest interactions allowed for the accommodation of molecular or metal clusters inside the nanoporous patterns. Three metal-organic networks led to the creation of regular arrays of isolated metal adatoms or adatom clusters.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Yohan Kim, Chang-Seok Lee, Seungwoo Son, Keun Wook Shin, Kyung-Eun Byun, Hyeon-Jin Shin, Zonghoon Lee, Hyung-Joon Shin
Summary: In this study, nanocrystalline graphene spirals with excellent out-of-plane conductivity were successfully produced by direct growth on noncatalytic substrates. The spiral structures of the graphene contribute to the enhanced vertical conductivity, and the uniform conductance is achieved through the development of Klein-edge structures at the edges of the nanocrystalline graphene aggregates. These findings have important implications for practical applications of graphene with vertical conductivity.
Article
Chemistry, Multidisciplinary
Yohan Kim, Huijun Han, Da Luo, Rodney S. Ruoff, Hyung-Joon Shin
Summary: The structural and electronic properties of graphene grown on catalytic metal surfaces are significantly modified due to the interaction between graphene and the substrate. To minimize the influence of the metal substrate, NaCl thin films can be introduced as intercalation layers to decouple graphene from the metal substrate, resulting in quasi-freestanding graphene.
Article
Chemistry, Physical
Jeong Su Kang, Ju Yeol Baek, Hyuntae Hwang, Hyeon Suk Shin, Chang Won Yoon, Hyung-Joon Shin
Summary: This study investigates the photocatalytic dehydrogenation of cis-1,4-diaminocyclohexane on Pd-decorated TiO2 surface and discovers a new pathway for breaking C-H bonds under UV irradiation at extremely low temperature and pressure compared to conventional dehydrogenation processes.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
