Article
Chemistry, Multidisciplinary
Haibin Sun, Fengning Liu, Leining Zhang, Kyungmin Ko, Ben McLean, Hao An, Sungkyun Kim, Ming Huang, Marc-Georg Willinger, Rodney S. Ruoff, Joonki Suh, Zhu-Jun Wang, Feng Ding
Summary: One-dimensional graphene nanostructures, such as graphene nanoribbons (GNRs) and graphene nanospears (GNSs), have shown great promise for next-generation electronics. This study reports on the growth of GNRs and GNSs on a copper surface using chemical vapor deposition. The growth mechanism involves a vapor-liquid-solid (VLS) process guided by the on-surface propagation of a liquid Cu-Si catalyst particle. The resulting GNRs and GNSs have high carrier mobilities and their Fermi levels can be tuned, making them suitable for various applications.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Wiliam F. da Cunha, Marcelo L. Pereira Junior, William F. Giozza, Rafael T. de Sousa Junior, Luiz A. Ribeiro Junior, Geraldo M. e Silva
Summary: This study used a numerical approach to reveal the charge transport mechanism in porous graphene nanoribbons, finding that the transport is mediated by polarons. The porosity of PG allows for the preservation of its semiconducting character. The polarons in PG move within the optical regime with lower velocities compared to conventional graphene nanoribbons.
COMPUTATIONAL MATERIALS SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
Jian Zhang, Liu Qian, Gabriela Borin Barin, Abdalghani H. S. Daaoub, Peipei Chen, Klaus Muellen, Sara Sangtarash, Pascal Ruffieux, Roman Fasel, Hatef Sadeghi, Jin Zhang, Michel Calame, Mickael L. L. Perrin
Summary: Individual graphene nanoribbons synthesized on surfaces can be contacted with carbon nanotubes and used to make multigate devices that exhibit quantum transport effects. Graphene nanoribbons synthesized with atomic precision can be precisely controlled for applications in quantum technology. The study reports the contacting and electrical characterization of on-surface synthesized graphene nanoribbons in a multigate device architecture using single-walled carbon nanotubes as electrodes, which show quantum transport phenomena indicating the contacting of individual nanoribbons.
NATURE ELECTRONICS
(2023)
Review
Physics, Applied
Haomin Wang, Hui Shan Wang, Chuanxu Ma, Lingxiu Chen, Chengxin Jiang, Chen Chen, Xiaoming Xie, An-Ping Li, Xinran Wang
Summary: Graphene nanoribbons, as a family of one-dimensional materials with a graphitic lattice structure, have shown high mobility, current-carrying capability, and versatile electronic properties, making them promising candidates for quantum electronic applications. Recent progress has been made in the atomically precise bottom-up synthesis of GNRs and heterojunctions, as well as in the production of semiconducting GNR arrays on insulating substrates, indicating a potential for large-scale digital circuits. In the near future, GNRs could become competitive candidate materials in quantum information sciences.
NATURE REVIEWS PHYSICS
(2021)
Article
Multidisciplinary Sciences
Austin J. Way, Robert M. Jacobberger, Nathan P. Guisinger, Vivek Saraswat, Xiaoqi Zheng, Anjali Suresh, Jonathan H. Dwyer, Padma Gopalan, Michael S. Arnold
Summary: This study demonstrates a method to synthesize one-dimensional graphene nanoribbons narrower than 5 nm using molecular-scale carbon seeds and chemical vapor deposition (CVD). The nanoribbons are grown by selectively extending the seeds along a single direction. The synthesized nanoribbons have small standard deviation, large aspect ratio, and tunable width. Field-effect transistors based on the nanoribbons show a significant difference in off-current due to the variation in nanoribbon widths.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Heather M. Hill, Ching-Chen Yeh, Swapnil M. Mhatre, Ngoc Thanh Mai Tran, Hanbyul Jin, Adam J. Biacchi, Chi-Te Liang, Angela R. Hight Walker, Albert F. Rigosi
Summary: We successfully prepared both armchair (AC) and zigzag (ZZ) epitaxial graphene nanoribbons (GNRs) on 4H-SiC using a polymer-assisted sublimation growth method. In this study, we mitigated the risk of GNR deformation along sidewalls by utilizing the physical phenomenon of terrace step formation. Electrical measurements confirmed the expected behaviors of the GNRs, and optical analysis revealed subtle differences among the different GNR species tested.
Article
Chemistry, Multidisciplinary
Bosai Lyu, Jiajun Chen, Shuo Lou, Can Li, Lu Qiu, Wengen Ouyang, Jingxu Xie, Izaac Mitchell, Tongyao Wu, Aolin Deng, Cheng Hu, Xianliang Zhou, Peiyue Shen, Saiqun Ma, Zhenghan Wu, Kenji Watanabe, Takashi Taniguchi, Xiaoqun Wang, Qi Liang, Jinfeng Jia, Michael Urbakh, Oded Hod, Feng Ding, Shiyong Wang, Zhiwen Shi
Summary: Graphene nanoribbons (GNRs) are promising materials for future nanoelectronic applications, but growing long GNRs on insulating substrates remains a challenge. This study reports the successful epitaxial growth of micrometer-long GNRs on an insulating substrate using nanoparticle-catalyzed chemical vapor deposition.
ADVANCED MATERIALS
(2022)
Editorial Material
Nanoscience & Nanotechnology
Sheng-Yi Xie, Xian-Bin Li
Summary: The study found a novel method to produce metallic GNRs by inserting a symmetric superlattice into other semiconductive GNRs, broadening their applications in nanoelectronics and fundamental science.
NANO-MICRO LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Li-Ping Ding, Yan Tang, Peng Shao, Hui Zhang, Yi-Jin Guo, Jia-Hao Zeng, Ya-Ru Zhao
Summary: The edge structure of 2D materials is crucial for their properties and functionalities. In this study, the edge reconstruction structures of ZnO nanoribbons were investigated using computational tools and theoretical simulations. Stable armchair, O-enriched zigzag, and Zn-enriched zigzag edge structures were identified.
Article
Chemistry, Physical
Oliver Braun, Jan Overbeck, Maria El Abbassi, Silvan Kaser, Roman Furrer, Antonis Olziersky, Alexander Flasby, Gabriela Borin Barin, Qiang Sun, Rimah Darawish, Klaus Muellen, Pascal Ruffieux, Roman Fasel, Ivan Shorubalko, Mickael L. Perrin, Michel Calame
Summary: This study reports a method for integrating atomically precise graphene nanoribbons in a field-effect transistor geometry using graphene electrodes defined by electron beam lithography, which allows for controlled electrode geometries. Thermal annealing is found to be a crucial step for successful device operation, ensuring stable electronic transport characteristics.
Article
Multidisciplinary Sciences
Song Jiang, Tomas Neuman, Alex Boeglin, Fabrice Scheurer, Guillaume Schull
Summary: In this study, the intrinsic optoelectronic properties of graphene nanoribbons (GNRs) were explored using a scanning tunneling microscope-based method. By transferring the GNRs onto a partially insulating surface, luminescence quenching effects were prevented and localized dark excitons associated with the topological end states of the GNRs were observed.
Article
Chemistry, Multidisciplinary
Alejandro Berdonces-Layunta, Adam Matej, Alejandro Jimenez-Martin, James Lawrence, Mohammed S. G. Mohammed, Tao Wang, Benjamin Mallada, Bruno de la Torre, Adrian Martinez, Manuel Vilas-Varela, Reed Nieman, Hans Lischka, Dana Nachtigallova, Diego Pena, Pavel Jelinek, Dimas G. de Oteyza
Summary: The study demonstrates the sensitivity of graphene nanoribbon zigzag edges to water, showing that water can hydrogenate the central carbon of the zigzag segments. This effect can be reversed by tip manipulation and annealing. The results also show a periodic pattern of spontaneous hydrogenation of gold-supported chiral graphene nanoribbons even at room temperature.
Article
Chemistry, Physical
Thi My Duyen Huynh, Guo-Song Hung, Godfrey Gumbs, Ngoc Thanh Thuy Tran
Summary: In this study, first-principles calculations are used to investigate the feature-rich properties of alkali-metal intercalated graphene nanoribbons (GNRs), including edge passivation, stacking configurations, intercalation sites, stability, charge density distribution, magnetic configuration, and electronic properties. The findings demonstrate a transformation from finite gap semiconducting to metallic behaviors, indicating enhanced electrical conductivity. This transformation is attributed to the cooperative or competitive relations among the significant chemical bonds, finite-size quantum confinement, edge structure, and stacking order. The decoration of edge structures with hydrogen and oxygen atoms provides additional information about stability and magnetization due to the ribbons' effect.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Umamahesh Thupakula, We-Hyo Soe, Christian Joachim, Erik Dujardin
Summary: In this study, a surface chemistry protocol was used to produce long and well-isolated graphene nanoribbons (GNRs) on a gold surface, suitable for single molecule electronic experiments.
COMMUNICATIONS CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Alexandre F. Fonseca
Summary: This study introduces an alternative method to manipulate the twist of twisted graphene nanoribbons (TGNR) without the need for rotation. By suspending the TGNR on two separate substrates and adjusting their distance, it is possible to change the total twist of the TNGR. Furthermore, the research shows the potential for fine-tuning the twist amount and satisfying the linking number theorem of space curves.
Article
Chemistry, Inorganic & Nuclear
Emily C. Monkcom, Hidde A. Negenman, Eduard Masferrer-Rius, Martin Lutz, Shengfa Ye, Eckhard Bill, Robertus J. M. Klein Gebbink
Summary: In this study, two new bioinspired N,N,O phenolate ligands were synthesized and their coordination chemistry with zinc(II) and iron(II) was explored. BenzImNNO readily formed homoleptic bisligated complexes, while the increased steric bulk of Im(Ph2)NNO promoted the formation of dinuclear complexes. The robustness of the ligand's coordination mode was demonstrated during oxidative transformations.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2022)
Article
Geochemistry & Geophysics
Katharina Kaiser, Fabian Schulz, Julien F. Maillard, Felix Hermann, Iago Pozo, Diego Pena, H. James Cleaves, Aaron S. Burton, Gregoire Danger, Carlos Afonso, Scott Sandford, Leo Gross
Summary: Researchers used high-resolution atomic force microscopy to atomically resolve individual molecules from Murchison meteorite samples. They also proposed a method for extracting and preparing meteorite samples for investigation. By processing the samples, they were able to increase the fraction of molecules that could be resolved by atomic force microscopy and identify organic constituents and molecular moieties.
METEORITICS & PLANETARY SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Somesh Chandra Ganguli, Viliam Vano, Shawulienu Kezilebieke, Jose L. Lado, Peter Liljeroth
Summary: Transition metal dichalcogenides (TMDC) are a family of two-dimensional materials with diverse quantum states. NbSe2, a d(3) TMDC, is a superconducting material with strong electronic repulsions indicating the presence of competing interactions and correlated insulating states.
Article
Chemistry, Multidisciplinary
Dirk J. Schild, Lucie Nurdin, Marc-Etienne Moret, Paul H. Oyala, Jonas C. Peters
Summary: This study reports the generation and low temperature characterization of a terminally bound iron(III) nitride, which is proposed as an intermediate in iron-mediated nitrogen fixation. Electron spin resonance spectroscopy and DFT calculations reveal the electronic structure of this nitride species, with the majority of the spin residing on boron.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Natalia Martin Sabanes, Faruk Krecinic, Takashi Kumagai, Fabian Schulz, Martin Wolf, Melanie Mueller
Summary: Efficient operation of electronic nanodevices at ultrafast speeds requires understanding and control of the currents generated by femtosecond bursts of light. In this study, we investigate the electronic heating and transient thermionic tunneling inside a metallic photoexcited tunnel junction to observe the competition between nonthermal and thermal hot electron distributions in real time, providing a detailed microscopic understanding of hot electron dynamics.
Correction
Chemistry, Multidisciplinary
Niko Oinonen, Chen Xu, Benjamin Alldritt, Prokop Hapala, Filippo Fderici Canova, Fedor Urtev, Shuning Cai, Ondrej Krejci, Juho Kannala, Peter Liljeroth, Adam S. Foster
Article
Chemistry, Multidisciplinary
Mohammad Amini, Orlando J. Silveira, Viliam Vano, Jose L. Lado, Adam S. Foster, Peter Liljeroth, Shawulienu Kezilebieke
Summary: 2D ferroelectric materials are promising for electrical control of quantum states, and can influence the quantum states of deposited molecules due to their 2D nature. This study reports electrically controllable molecular states in phthalocyanine molecules adsorbed on monolayer ferroelectric material SnTe. The strain and ferroelectric order in SnTe create a transition between two distinct orbital orders in the adsorbed phthalocyanine molecules. The polarization of the ferroelectric domain can be manipulated electrically, providing a starting point for ferroelectrically switchable molecular orbital ordering and ultimately, electrical control of molecular magnetism.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Rakesh Sen, Shounik Paul, Sriram Krishnamurthy, Anupama Devi, Ethayaraja Mani, R. J. M. Klein Gebbink, Soumyajit Roy
Summary: This study demonstrates with experimental evidence how the emulation of space-time symmetry breaking by electrochemical realization of a Time-Gel' can lead to the creation of matter. Time-Gel' is realized by inducing the gelation phenomenon of discrete molecular precursors, and the temporal information descriptor (Q) exhibits a power-law relationship (Q proportional to Phi(g)^n) with the volume fraction of the gel (Phi(g)). The exponent n is 5, indicating the divergence in matter creation. This finding further supports the understanding that the breaking of symmetry under conditions following Noether's theorem leads to the emergence of matter. In summary, this research proposes the idea of symmetry breaking and presents the electrochemical realization of the Time-Gel' model as an alternative explanation for the creation of matter based on Chemical Science.
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
(2023)
Article
Multidisciplinary Sciences
I-Ju Chen, Markus Aapro, Abraham Kipnis, Alexander Ilin, Peter Liljeroth, Adam S. Foster
Summary: This study demonstrates the use of deep reinforcement learning and path planning algorithms for autonomous manipulation and assembly of silver atoms, providing a new approach for nanoscale fabrication and the creation of exotic quantum states in artificial structures.
NATURE COMMUNICATIONS
(2022)
Book Review
Religion
Fabian Schulz
ZEITSCHRIFT FUR ANTIKES CHRISTENTUM-JOURNAL OF ANCIENT CHRISTIANITY
(2022)
Article
Chemistry, Multidisciplinary
Somesh Chandra Ganguli, Markus Aapro, Shawulienu Kezilebieke, Mohammad Amini, Jose L. Lado, Peter Liljeroth
Summary: Two-dimensional magnetic materials provide a platform to study and design magnonic excitations. This study demonstrates the emergence of moire magnon excitations in monolayer CrBr3, resulting from the interplay of spin-excitations and the moire pattern. The existence of moire magnons is confirmed through inelastic quasiparticle interference, which shows a dispersion pattern correlated with the moire length scale.
Article
Chemistry, Multidisciplinary
Viliam Vano, Somesh Chandra Ganguli, Mohammad Amini, Linghao Yan, Maryam Khosravian, Guangze Chen, Shawulienu Kezilebieke, Jose L. Lado, Peter Liljeroth
Summary: Unconventional superconductors, particularly nodal superconductors, have been a focus in modern quantum materials research. This study demonstrates the existence of nodal superconductivity in pristine monolayer 1H-TaS2 using low-temperature scanning tunneling microscopy (STM) and spectroscopy (STS) experiments. It is also found that non-magnetic disorder can drive the nodal state to a conventional gapped s-wave state, and many-body excitations emerge near the gap edge, indicating a potential unconventional pairing mechanism.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Serhii Tretiakov, Martin Lutz, Charles James Titus, Frank de Groot, Joscha Nehrkorn, Thomas Lohmiller, Karsten Holldack, Alexander Schnegg, Maxime Francois Xavier Tarrago, Peng Zhang, Shengfa Ye, Dmitry Aleshin, Alexander Pavlov, Valentin Novikov, Marc-Etienne Moret
Summary: High-valent iron species are important intermediates in catalytic oxidation reactions, and their study contributes to the understanding of both biological and synthetic systems. In this study, the redox chemistry of iron complexes with a dianionic tris-skatylmethylphosphonium (TSMP2-) scorpionate ligand was investigated. The results show that the complexes can undergo one-electron oxidation to form octahedral Fe(III) and Fe(IV) compounds, and the Fe(IV) compound has a triplet ground state. Extensive spectroscopic and computational methods were used to analyze its electronic structure.
INORGANIC CHEMISTRY
(2023)
Article
Physics, Multidisciplinary
Robert Drost, Shawulienu Kezilebieke, Jose L. Lado, Peter Liljeroth
Summary: Quantum magnets have proven to be a powerful tool for studying complex quantum many-body phenomena. In this study, researchers engineered a minimal quantum magnet using organic molecules and observed the emergence of dispersive triplon excitations in one- and two-dimensional assemblies using scanning tunneling microscopy and spectroscopy. This is the first demonstration of dispersive triplon excitations from a real-space measurement.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Pouya Zaree, Ilhan Tomris, Sander D. de Vos, Roosmarijn van der Woude, Frits M. Flesch, Robertus J. M. Klein Gebbink, Robert P. de Vries, Roland J. Pieters
Summary: A miniaturized sensor containing graphene- and gold nanoparticles was functionalized with proteins for electrochemical detection. The interactions between molecules and proteins were observed and quantified using cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The protein binders included carbohydrate ligands as small as carbohydrates and COVID-19 spike protein variants engaged in protein-protein interactions.