Article
Chemistry, Multidisciplinary
Victor Zatko, Simon Mutien-Marie Dubois, Florian Godel, Cecile Carretero, Anke Sander, Sophie Collin, Marta Galbiati, Julian Peiro, Federico Panciera, Gilles Patriarche, Pierre Brus, Bernard Servet, Jean-Christophe Charlier, Marie-Blandine Martin, Bruno Dlubak, Pierre Seneor
Summary: This study presents a growth process utilizing pulsed laser deposition to create large-scale complex van der Waals heterostructures at a high temperature, demonstrating the successful construction of multilayer stacks in a single run with high homogeneity. The structural preservation achieved through continuous in situ growth allows even the most fragile 2D layers to remain intact when encapsulated in van der Waals heterostructures.
Article
Multidisciplinary Sciences
A. J. Sternbach, S. H. Chae, S. Latini, A. A. Rikhter, Y. Shao, B. Li, D. Rhodes, B. Kim, P. J. Schuck, X. Xu, X-Y Zhu, R. D. Averitt, J. Hone, M. M. Fogler, A. Rubio, D. N. Basov
Summary: Layered crystals, such as tungsten diselenide, can exhibit unconventional optical properties that allow for the propagation of subdiffractional waveguide modes with hyperbolic dispersion. This study demonstrates optically induced hyperbolicity in WSe2 and explores the role of quantum transitions of excitons in the observed polaritonic response.
Review
Chemistry, Multidisciplinary
Hui-Lei Hou, Cosimo Anichini, Paolo Samori, Alejandro Criado, Maurizio Prato
Summary: In the past 15 years, 2D materials have revolutionized materials science and become powerful components for high-performance chemical sensors. By forming van der Waals heterostructures (VDWHs), the individual drawbacks of 2D materials can be overcome, leading to superior sensitivities, selectivity, and stability. This review discusses the latest developments in chemical sensors based on VDWHs of 2D materials, including sensing mechanisms and future directions with potential impact in environmental sciences and biomedical applications.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Abhinandan Antony, Martin Gustafsson, Guilhem J. Ribeill, Matthew Ware, Anjaly Rajendran, Luke C. G. Govia, Thomas A. Ohki, Takashi Taniguchi, Kenji Watanabe, James Hone, Kin Chung Fong
Summary: By utilizing van der Waals materials, quantum bits can be reduced in size while maintaining capacitance and quantum coherence, potentially enabling high qubit-density quantum processors. This study demonstrates the broad utility of layered heterostructures in low-loss, high-coherence quantum devices.
Article
Chemistry, Multidisciplinary
Eli Sutter, Raymond R. Unocic, Juan-Carlos Idrobo, Peter Sutter
Summary: Research demonstrates multilayer heterostructures of van der Waals semiconductors with lateral interfaces, featuring sharp and laterally localized interfaces, as well as showing evidence of rapid transfer of electron-hole pairs across interfaces.
Article
Chemistry, Multidisciplinary
Gunho Moon, Seok Young Min, Cheolhee Han, Suk-Ho Lee, Heonsu Ahn, Seung-Young Seo, Feng Ding, Seyoung Kim, Moon-Ho Jo
Summary: A new type of atomically thin synaptic network is reported, where ultrasmall cells built with trilayer WS2 semiconductor act as gate-tunable photoactive synapses. This network can accurately modulate the conductance of the synaptic cells, allowing for potentiation and depression. It is shown that this device scheme can be realized in other 2D vdW semiconductors, providing implications for high-density parallel matrix computations in artificial neural networks.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Liang Liu, Zezhou Lin, Jifan Hu, Xi Zhang
Summary: Five 2D semiconductors with ferromagnetic properties and their corresponding Curie temperatures were identified using a new method, which showed agreement with experimental results. Systems with low-spin numbers and low anisotropies have higher Curie temperatures. These findings provide excellent candidates for future spintronics applications.
Article
Materials Science, Multidisciplinary
Alexander A. Balandin, Fariborz Kargar, Tina T. Salguero, Roger K. Lake
Summary: The advent of graphene and other two-dimensional van der Waals materials has led to significant progress in fundamental science. This review focuses on the emerging field of one-dimensional van der Waals quantum materials, which involves atomic chains and their unique properties. The authors discuss various quantum effects, such as charge-density-wave condensate and topological phases, as well as the potential applications of these materials in composites.
Article
Chemistry, Multidisciplinary
Pengyu Li, Yinghe Zhao, Huiqiao Li, Tianyou Zhai
Summary: This study systematically investigates the working mechanisms of Sb2O3 and two Sb2O3-like molecules (As2O3 and Bi2O3) as dielectrics, using a combination of first-principles calculations and gate leakage current theories. It is found that molecules-based vdW dielectrics have a significant advantage over conventional materials, as defects have hardly any impact on their insulating properties. Furthermore, the study reveals that Sb2O3 faces challenges in meeting the requirements for both p-MOS and n-MOS devices, while As2O3 can serve as a dielectric for both types. This research provides a theoretical foundation for the application of molecules-based vdW dielectrics and offers a competitive choice (As2O3) for optimizing the dielectric layer in 2D vdW semiconductor-based CMOS devices, with profound implications for the future semiconductor industry.
Article
Chemistry, Multidisciplinary
Ningxin Li, Aisha Okmi, Tara Jabegu, Hongkui Zheng, Kuangcai Chen, Alexander Lomashvili, Westley Williams, Diren Maraba, Ivan Kravchenko, Kai Xiao, Kai He, Sidong Lei
Summary: Biomimetic artificial vision is gaining attention, especially in the development of neuromorphic electronic devices, artificial intelligence, and microrobotics. However, the current research lacks color recognition, the most critical vision function, due to the downsizing challenges of existing color sensing devices. In this study, we present a van der Waals semiconductor-enabled vertical color sensing structure that focuses on compact device profile and accurate color recognition capability. Additionally, we introduce chromatic aberration correction to the color sensor hardware, simplifying the design of optical lens systems and further reducing the size of artificial vision systems. The scalability and practical potentials of our developed device architecture are demonstrated by a multiple pixel prototype device in this research.
Article
Chemistry, Multidisciplinary
Gaojie Zhang, Hao Wu, Liang Zhang, Shanfei Zhang, Li Yang, Pengfei Gao, Xiaokun Wen, Wen Jin, Fei Guo, Yuanmiao Xie, Hongda Li, Boran Tao, Wenfeng Zhang, Haixin Chang
Summary: The study reports a vdW semiconductor CrxGa1-xTe crystal with tunable above-room-temperature ferromagnetism and a bandgap of 1.62-1.66 eV. The magnetic properties of CrxGa1-xTe crystals can be effectively regulated by tuning Cr content and changing the thickness, showing robust room-temperature ferromagnetism with a 2D quantum confinement effect. This work opens up a new avenue for preparing room-temperature 2D vdW ferromagnetic semiconductors.
Article
Chemistry, Multidisciplinary
Wenjing Song, Lingan Kong, Quanyang Tao, Qing Liu, Xiangdong Yang, Jia Li, Huigao Duan, Xidong Duan, Lei Liao, Yuan Liu
Summary: The novel van der Waals (vdW) stencil lithography technique developed in this study allows for the fabrication of high performance transistors on 2D semiconductors without inducing damage, and provides a new high resolution lithography technique for 2D materials.
Article
Chemistry, Analytical
Liwei Liu, Ning Sheng Xu, Yanlin Ke, Huanjun Chen, Yu Zhang, Shaozhi Deng
Summary: A new sensing principle based on the change of surface work function induced by various impacts has been proposed and demonstrated. Gas sensing devices using van der Waals stacked 2D atomic crystals have been fabricated to detect NH3 and NO2 gases selectively. The devices show superior sensing performances in terms of sensitivity, power dissipation, response and recovery time.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Multidisciplinary
Huanhuan Shi, Mengmeng Li, Shuai Fu, Christof Neumann, Xiaodong Li, Wenhui Niu, Yunji Lee, Mischa Bonn, Hai I. I. Wang, Andrey Turchanin, Ali Shaygan Nia, Sheng Yang, Xinliang Feng
Summary: Two-dimensional van der Waals heterostructures (2D vdWHs) have attracted widespread attention for their abundant and exotic properties, offering new possibilities for next-generation nanoelectronics. However, the lack of high-throughput fabrication techniques poses challenges for practical applications. In this study, a general electrochemical strategy is demonstrated to prepare high-quality vdWHs with electrostatic forces driving the stacking of individual assemblies, resulting in strong interlayer interactions. Thin-film photodetectors based on graphene/In2Se3 vdWHs show great promise for near-infrared photodetection, with high responsivity, fast rise and decay times. This approach enables the exploration of emerging electronic, photonic, and quantum phenomena.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Nanoscience & Nanotechnology
Daniel Willhelm, Nathan Wilson, Raymundo Arroyave, Xiaoning Qian, Tahir Cagin, Ruth Pachter, Xiaofeng Qian
Summary: This paper presents a computational framework combining first-principles electronic structure calculations, a 2D material database, and supervised machine learning methods to predict the electronic and structural properties of vdW heterostructures. The data-driven model enables efficient screening and discovery of low-dimensional vdW heterostructures and moire superlattices with desired properties.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Green & Sustainable Science & Technology
Gianluca D'Olimpio, Jessica Occhiuzzi, Luca Lozzi, Luca Ottaviano, Antonio Politano
Summary: Liquid-phase exfoliation of layered materials is an ideal method for scalable synthesis of nanosheets. However, the toxicity of existing solvents limits their application. In this study, a new solvent called Rhodiasolv Iris is validated for efficient liquid-phase exfoliation of van der Waals materials, providing high yield of 2D material flakes with high aspect ratio. The use of Iris opens up new possibilities for the ecofriendly production and industrial usage of 2D materials. The values of surface tension, Hansen solubility parameter, and viscosity of Rhodiasolv Iris are also reported for the first time.
ADVANCED SUSTAINABLE SYSTEMS
(2022)
Article
Chemistry, Multidisciplinary
Zhen Hu, Libo Zhang, Atasi Chakraborty, Gianluca D'Olimpio, Jun Fujii, Anping Ge, Yuanchen Zhou, Changlong Liu, Amit Agarwal, Ivana Vobornik, Daniel Farias, Chia-Nung Kuo, Chin Shan Lue, Antonio Politano, Shao-Wei Wang, Weida Hu, Xiaoshuang Chen, Wei Lu, Lin Wang
Summary: This study reports the observation of the second-order NLHE in type-II Dirac semimetal CoTe2 under time-reversal symmetry. The NLHE is determined by the disorder-induced extrinsic contribution on the broken-inversion-symmetry surface, and terahertz rectification at room temperature is achieved without the need for semiconductor junctions or bias voltage. Remarkable photoresponsivity, response time, and mean noise equivalent power are achieved. This opens a new pathway for low-energy photon harvesting in strongly spin-orbit-coupled and inversion-symmetry-breaking systems.
ADVANCED MATERIALS
(2023)
Article
Engineering, Chemical
Sergio Santoro, Marco Aquino, Carlo Rizza, Jessica Occhiuzzi, Dario Mastrippolito, Gianluca D'Olimpio, Ahmet H. Avci, Jessica De Santis, Valentina Paolucci, Luca Ottaviano, Luca Lozzi, Avner Ronen, Maya Bar-Sadan, Dong Suk Han, Antonio Politano, Efrem Curcio
Summary: We have developed a new technology using excitons-based light-to-heat conversion promoted by WS2 nanofillers for sunlight-driven photothermal membrane crystallization, to extract lithium from Li-rich brines. This green and economical nanotechnology platform enhances water evaporation and triggers the crystallization of LiCl salt. These findings provide new opportunities for the large-scale, efficient, and sustainable recovery of lithium and other critical raw materials for clean energy transition.
Article
Chemistry, Physical
Silvia Mauri, Gianluca D'Olimpio, Corneliu Ghica, Luca Braglia, Chia-Nung Kuo, Marian Cosmin Istrate, Chin Shan Lue, Luca Ottaviano, Tomasz Klimczuk, Danil W. Boukhvalov, Antonio Politano, Piero Torelli
Summary: This study investigates the surface reactivity of a Ni3Sn4 catalyst operating at 250 degrees C for hydrogen production from methanol decomposition. It is found that the catalytic reaction is driven by surface tin-oxide phases, which enhance catalyst durability and H2 selectivity. These findings provide new perspectives for the development of scalable and low-cost catalysts.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Biochemistry & Molecular Biology
Jessica Occhiuzzi, Grazia Giuseppina Politano, Gianluca D'Olimpio, Antonio Politano
Summary: The recent advent of two-dimensional (2D) materials has had a ground-breaking impact on science and technology. Liquid-phase exfoliation based on green and bioderived solvents represents an ideal methodology for the large-scale production of 2D materials. The use of eco-friendly solvents such as Polarclean and Iris enables low-density defects and ink-jet printing with functional inks of 2D materials.
Article
Chemistry, Multidisciplinary
Federico Mazzola, Barun Ghosh, Jun Fujii, Gokul Acharya, Debashis Mondal, Giorgio Rossi, Arun Bansil, Daniel Farias, Jin Hu, Amit Agarwal, Antonio Politano, Ivana Vobornik
Summary: We report the experimental signature of topological Dirac antiferromagnetism in TaCoTe2, demonstrating the existence of spin-orbit coupling-induced gaps at the Fermi level and a large intrinsic nonlinear Hall conductivity. The orientation of the Neel vector in TaCoTe2 shows remarkable sensitivity, suggesting its potential for non-volatile spintronic devices with unprecedented levels of intrinsic tunability.
Article
Chemistry, Multidisciplinary
Kaixuan Zhang, Zhen Hu, Libo Zhang, Yulu Chen, Dong Wang, Mengjie Jiang, Gianluca D'Olimpio, Li Han, Chenyu Yao, Zhiqingzi Chen, Huaizhong Xing, Chia-Nung Kuo, Chin Shan Lue, Ivana Vobornik, Shao-Wei Wang, Antonio Politano, Weida Hu, Lin Wang, Xiaoshuang Chen, Wei Lu
Summary: This study exploits low-energy type-II Dirac fermions in topological semimetals for ultrasensitive THz detection, and demonstrates a novel photodetector combining two Dirac materials, graphene and NiTeSe, with high responsivity, fast response time, and outstanding stability.
Article
Chemistry, Physical
Danil W. Boukhvalov, Gianluca D'Olimpio, Federico Mazzola, Chia-Nung Kuo, Sougata Mardanya, Jun Fujii, Grazia Giuseppina Politano, Chin Shan Lue, Amit Agarwal, Ivana Vobornik, Piero Torelli, Antonio Politano
Summary: In recent years, the correlation between topological electronic states in quantum materials and their catalytic activity has attracted attention. However, the physicochemical mechanisms governing catalysis with quantum materials are not fully understood. This study investigates the reactivity and stability of AuSn4, a topological nodal-line semimetal, and reveals that surface oxidation enhances its catalytic activity for the hydrogen evolution reaction. The peculiar atomic structure of oxidized AuSn4 enables the migration of hydrogen atoms through a Sn-O layer with minimal energy barrier, making it a promising catalyst.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Federico Mazzola, Yanxue Zhang, Natalia Olszowska, Marcin Rosmus, Gianluca D'Olimpio, Marian Cosmin Istrate, Grazia Giuseppina Politano, Ivana Vobornik, Raman Sankar, Corneliu Ghica, Junfeng Gao, Antonio Politano
Summary: Nonmagnetic chiral crystals are a new type of materials that possess Kramers-Weyl Fermions due to the combination of structural chirality, spin-orbit coupling, and time-reversal symmetry. These materials exhibit unique Fermi surfaces with spin-orbit coupling-induced Chern gaps, leading to exotic transport and optical properties. This study investigates the electronic structure and transport properties of CdAs2, a recently discovered chiral material, using angle-resolved photoelectron spectroscopy and density functional theory. The results suggest that CdAs2 is a promising candidate for novel topological properties and provide valuable insights for the development of spintronic and optical devices based on chiral charges and nontrivial Chern numbers.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Physical
Yanxue Zhang, Gianluca D'Olimpio, Federica Bondino, Silvia Nappini, Marian Cosmin Istrate, Raman Sankar, Corneliu Ghica, Luca Ottaviano, Junfeng Gao, Antonio Politano
Summary: The chemical reactivity of cadmium diarsenide (CdAs2) towards ambient gases (oxygen and water) and air was assessed using density functional theory and experiments. The surface of CdAs2 forms an oxide skin, but its thickness remains nanometric even after one year in air. Therefore, future quantum devices based on Kramers-Weyl fermions could be stable in air, as the native oxide layer formed on chiral quantum materials actually protects their bulk features.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Gianluca D'Olimpio, Vardan Galstyan, Corneliu Ghica, Mykhailo Vorokhta, Marian Cosmin Istrate, Chia-Nung Kuo, Chin Shan Lue, Danil W. W. Boukhvalov, Elisabetta Comini, Antonio Politano
Summary: In this work, solution-processed In2Se3 nanosheets are shown to have exceptional selectivity and sensitivity to NO2 gas, making them a promising candidate for gas detection systems. The unique surface properties of In2Se3 nanosheets prevent oxidation and CO-poisoning, while enabling stable adsorption of NO2 molecules. This makes In2Se3 an ideal material for gas sensing applications in humid and harsh environments.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Danil W. W. Boukhvalov, Gianluca D'Olimpio, Junzhe Liu, Corneliu Ghica, Marian Cosmin Istrate, Chia-Nung Kuo, Grazia Giuseppina Politano, Chin Shan Lue, Piero Torelli, Lixue Zhang, Antonio Politano
Summary: Methanol oxidation shows potential for clean energy transition, especially in DMFCs. However, developing efficient and cost-effective catalysts for MOR remains challenging. We report the remarkable electrocatalytic activity and stability of Ni3Sn4 in acidic media, comparable to commercial Pt/C catalysts. Our catalyst design using Ni and Sn elements is 1800 times more cost-effective than Pt/C, as confirmed by DFT modeling. Additionally, the synthesized Ni3Sn4 electrocatalyst demonstrates excellent durability even after prolonged exposure to harsh acidic conditions.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Danil W. Boukhvalov, Gianluca D'Olimpio, Federico Mazzola, Chia-Nung Kuo, Sougata Mardanya, Jun Fujii, Grazia Giuseppina Politano, Chin Shan Lue, Amit Agarwal, Ivana Vobornik, Piero Torelli, Antonio Politano
Summary: In recent years, the relationship between topological electronic states in materials and their catalytic activity has been extensively researched due to the outstanding properties of quantum materials. This study focuses on the reactivity, stability, and catalytic activity of AuSn4, a topological nodal-line semimetal. The findings show that the surface of AuSn4 readily oxidizes, resulting in the formation of a SnO2 skin, which enhances its catalytic performance for the hydrogen evolution reaction in acidic environments. Additionally, the peculiar atomic structure of oxidized AuSn4 enables the migration of hydrogen atoms, reducing the energy barrier significantly.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Pablo Casado Aguilar, Fabian Calleja, Chia-Nung Kuo, Chin Shan Lue, Barun Ghosh, Amit Agarwal, Antonio Politano, Amadeo L. Vazquez de Parga, Rodolfo Miranda, Jose Angel Silva-Guillen, Manuela Garnica
Summary: In this study, the surface of a freshly cleaved PtTe2 crystal was observed and its defects were identified using STM in combination with first-principles calculations. It was found that short-wavelength electron density oscillations exist around the defects, and Fourier transform analysis of the energy-dependent quasiparticle interference patterns confirmed the calculated joint density of states, demonstrating the unique properties of the PtTe2 surface. This highlights the importance of STM in understanding the surface of topological materials.
JOURNAL OF PHYSICS-MATERIALS
(2022)
