Article
Materials Science, Ceramics
Hee Ju Yun, Sung Yeon Ryu, Ha Young Lee, Woo Young Park, Soo Gil Kim, Byung Joon Choi
Summary: Rare-earth oxide materials show interesting resistive switching properties in resistive switching memory. Post-deposition annealing of GdOx films enhances the tunability of resistance states, which is beneficial for multi-level operation. The effects of crystallization and hygroscopic nature of GdOx film on resistive switching characteristics are investigated.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Ramesh Y. Adhikari, Nicole E. Harmon, K. Paige Williams
Summary: The study demonstrates resistive switching behavior on unprocessed leaves, showing reliable switching between high and low resistance states with high endurance and potential for memory devices.
APPLIED MATERIALS TODAY
(2021)
Article
Engineering, Electrical & Electronic
Wun-Ciang Jhang, Chih-Chieh Hsu
Summary: This study demonstrates a high-performance dual-function device using a single SiO2 resistive switching layer. The device shows high memory window and stability as a memory device, and low leakage current and energy consumption as a selector.
IEEE ELECTRON DEVICE LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Timea Nora Torok, Janos Gergo Fehervari, Gabor Meszaros, Laszlo Posa, Andras Halbritter
Summary: Resistive switching memory devices have the potential to achieve artificial neural networks and nonconventional computing. Studying single resistive switching elements is crucial for utilizing their characteristics for computation. The variability of set time, the timespan before the transition from a high-resistance OFF state to a low-resistance ON state, is key to utilizing the inherent stochasticity of resistance switching. In this study, the set time statistics in nanometer-sized graphene-SiOx-graphene resistive switching memory devices were investigated. The study demonstrated a universal variance of logarithmic set time values, which is characteristic of a nucleation-driven crystallization process. The correlation between OFF state resistance and set time was observed and the tunability of set time statistics was explored by changing the reset amplitude parameter in sequential pulsed measurements. This phenomenon could be useful for controlling stochasticity in memristor-based probabilistic computing applications.
ACS APPLIED NANO MATERIALS
(2022)
Article
Physics, Applied
Hongrong Hu, Alexander Scholz, Surya Abhishek Singaraju, Yushu Tang, Gabriel Cadilha Marques, Jasmin Aghassi-Hagmann
Summary: This study presents an inkjet-printed resistive switching device based on an Ag/ZnO/Au structure, exhibiting excellent performance and a stable conduction mechanism.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Revannath Dnyandeo Nikam, Krishn Gopal Rajput, Hyunsang Hwang
Summary: The report introduces a quantized conductance atomic threshold switch (QCATS) using an atomically-thin hexagonal boron nitride (hBN) layer, which has applications in memory and logic devices. The device shows stable and reproducible conductance quantization state and operates by forming single-atom point contact through a monoatomic boron defect in the hBN layer. By implementing excellent switching characteristics with single-layer hBN, the possibility of stable and uniform atomic-switching devices for future memory and logic applications is confirmed.
Article
Materials Science, Multidisciplinary
Karuna Kumari, Subhasmita Kar, Ajay D. Thakur, S. J. Ray
Summary: In this study, an additional oxide layer was incorporated into the structure of an oxide memristor to improve its switching performance and endurance. The role of oxygen vacancies in controlling the electronic state of ZnO and the resistive switching process was confirmed by computational calculations.
CURRENT APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Kangmin Leng, Xu Zhu, Zhongyuan Ma, Xinyue Yu, Jun Xu, Ling Xu, Wei Li, Kunji Chen
Summary: Resistive switching memory devices, as the building block of brain-inspired computing, have attracted great interest due to their ability to mimic synapses and neurons. This study presents artificial neurons and synapses based on the Al/a-SiNxOy:H/P+-Si device, which exhibit tunable switching characteristics from threshold to memory. By controlling the compliance current, the researchers were able to induce volatile threshold switching and stable nonvolatile memory switching. The conduction mechanisms of these switches were found to agree with established models. This discovery offers a promising approach to constructing neuromorphic devices for brain-inspired computing in the era of AI.
Article
Chemistry, Physical
Km Komal, Govind Gupta, Mukhtiyar Singh, Bharti Singh
Summary: The resistive switching performance of reduced graphene oxide (RGO) and tin oxide (SnO2) based nanocomposite has been investigated in this study. The nanocomposite showed improved resistive switching compared to pure SnO2 film, with reduced operating voltage and enhanced resistance ratio. The fabricated composite film-based device exhibited good retention and endurance behavior. These findings suggest great potential for future non-volatile memory devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Applied
Qiaoling Tian, Xiaoning Zhao, Ya Lin, Zhongqiang Wang, Ye Tao, Haiyang Xu, Yichun Liu
Summary: In this paper, a complementary resistive switch (CRS) with good thermal stability and low ON current is reported. The device consists of a bilayer structure made of amorphous carbon and thermally annealed copper-doped amorphous carbon. The presence of copper atoms in the amorphous carbon layer allows for the formation of nanosized active electrodes, enabling the migration and redistribution of copper species to form conductive filaments. The device operates stably at high temperatures and exhibits a low ON state current, showing potential for low power memory/computing applications and harsh electronics.
APPLIED PHYSICS LETTERS
(2022)
Article
Multidisciplinary Sciences
Jiyuan Zheng, Xingjun Xue, Cheng Ji, Yuan Yuan, Keye Sun, Daniel Rosenmann, Lai Wang, Jiamin Wu, Joe C. Campbell, Supratik Guha
Summary: By replacing a fixed quenching resistor with a bias-dependent adaptive resistive switch, the recovery speed and frequency response of single-photon avalanche diodes can be significantly improved.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Elliot J. Fuller, David S. Ashby, Celia Polop, Elena Salagre, Bhuvsmita Bhargava, Yueming Song, Enrique Vasco, Joshua D. Sugar, Paul Albertus, Tevfik Onur Mentes, Andrea Locatel, Pilar Segovia, Miguel Angel Gonzalez-Barrio, Arantzazu Mascaraque, Enrique G. Michel, A. Alec Talin
Summary: In this study, isolated LiCoO2 islands were subjected to electrochemical cycling and the spatial distribution of conductive and insulating phases was observed using conductive atomic force microscopy (c-AFM). The research findings show that smaller LCO islands have a higher conductive fraction and surface energy can dominate in smaller islands. Additionally, significant shifts in current flow were observed when force was applied to strain the islands, and the underlying mechanisms for this behavior were discussed. Comparison with photoemission electron microscopy images indicated that strain and morphology become more critical to electrochemical performance as particles approach nanometer dimensions.
Review
Chemistry, Multidisciplinary
Mi Li, Ning Xi, Yue-chao Wang, Lian-qing Liu
Summary: Mechanics play important roles throughout the processes of biological system development, tumor development, and metastasis. Investigating tumor mechanics on multiple levels is significantly helpful for comprehensively understanding the effects of mechanics on tumor progression. Techniques like atomic force microscopy offer novel possibilities for understanding tumor physics and contributing to cancer studies.
ACTA PHARMACOLOGICA SINICA
(2021)
Article
Chemistry, Applied
Ye Tian, Shiyang Zhu, Yizeng Di, Huiling Liu, Hongyan Yao, Yunhe Zhang, Shaowei Guan
Summary: Molecular orbital energy levels are crucial in the performance of memory materials, and regulating the HOMO levels can optimize the performance of storage devices. Designing and synthesizing polyimides with similar LUMO levels but different HOMO levels can effectively decrease the threshold voltage of memory devices and improve their performance.
Article
Chemistry, Physical
Seung Woo Han, Chul Jin Park, Moo Whan Shin
Summary: This study demonstrates that the diffusion of aluminum atoms and oxygen vacancies significantly affect the resistive switching behavior of zinc oxide-based random resistive access memory (RRAM). The diffusion of aluminum atoms into the zinc oxide layer acts as dopants, producing additional oxygen vacancies and contributing to the formation of conductive filaments. Additionally, the formation of an aluminum oxide layer by the redox reaction between aluminum atoms and oxygen leads to the instability of the reset process.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Timea Nora Torok, Miklos Csontos, Peter Makk, Andras Halbritter
Article
Physics, Multidisciplinary
Lujun Wang, Peter Makk, Simon Zihlmann, Andreas Baumgartner, David I. Indolese, Kenji Watanabe, Takashi Taniguchi, Christian Schoenenberger
PHYSICAL REVIEW LETTERS
(2020)
Article
Multidisciplinary Sciences
Zoltan Scherubl, Gergo Fulop, Catalin Pascu Moca, Jorg Gramich, Andreas Baumgartner, Peter Makk, Tosson Elalaily, Christian Schonenberger, Jesper Nygard, Gergely Zarand, Szabolcs Csonka
NATURE COMMUNICATIONS
(2020)
Article
Multidisciplinary Sciences
Matthew Sarsby, Nikolai Yurttagul, Attila Geresdi
NATURE COMMUNICATIONS
(2020)
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
Physics, Applied
Nikolai Yurttagul, Matthew Sarsby, Attila Geresdi
Summary: The study shows that even when considering variations in device parameters, the conductance characteristics of the primary regime can be extended for large arrays. The simulations agree well with measured conductance traces in the submillikelvin electron temperature regime.
JOURNAL OF LOW TEMPERATURE PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Oliver Kurtossy, Zoltan Scherubl, Gergo Fulop, Istvan Endre Lukacs, Thomas Kanne, Jesper Nygard, Peter Makk, Szabolcs Csonka
Summary: Coupling individual atoms fundamentally changes the state of matter, leading to exotic states and topologically protected excitations through tunneling via superconducting vacuum. By creating two artificial atoms with individual tunability at a minimal distance, hybridization via the BCS vacuum was observed and the spectrum of an Andreev molecule as a function of level positions was explored for the first time.
Correction
Physics, Multidisciplinary
M. Hays, V. Fatemi, K. Serniak, D. Bouman, S. Diamond, G. de Lange, P. Krogstrup, J. Nygard, A. Geresdi, M. H. Devoret
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
Chemistry, Multidisciplinary
Tosson Elalaily, Oliver Kurtossy, Zoltan Scherubl, Martin Berke, Gergo Fulop, Istvan Endre Lukacs, Thomas Kanne, Jesper Nygard, Kenji Watanabe, Takashi Taniguchi, Peter Makk, Szabolcs Csonka
Summary: Researchers have achieved gate-controlled supercurrent for the first time on InAs nanowires, where the supercurrent in the epitaxial Al layer can be switched to the normal state by applying a voltage. Despite ruling out the electric field as the origin of GCS in their device through extensive study of temperature and magnetic field dependencies, they find that a recent model based on non-equilibrium phonons is compatible with most of their results.
Article
Chemistry, Multidisciplinary
Balint Szentpeteri, Peter Rickhaus, Folkert K. de Vries, Albin Marffy, Balint Fulop, Endre Tovari, Kenji Watanabe, Takashi Taniguchi, Andor Kormanyos, Szabolcs Csonka, Peter Makk
Summary: Twisted two-dimensional structures provide new possibilities for band structure engineering, with flat bands emerging at magic twist angles, driving progress in strongly correlated physics. In twisted double bilayer graphene, dual gating allows for changes in Fermi level, electron density, and interlayer potential, offering further band gap control. By applying hydrostatic pressure, additional band structure control is enabled through changes in tunnel couplings between layers, leading to significant alterations in flat bands and gaps under pressures up to 2 GPa, consistent with theoretical simulations. Moreover, measurements suggest that a topologically nontrivial band gap opens at the charge neutrality point with zero displacement field in finite magnetic field due to pressure.
Article
Nanoscience & Nanotechnology
Balint Fulop, Albin Marffy, Simon Zihlmann, Martin Gmitra, Endre Tovari, Balint Szentpeteri, Mate Kedves, Kenji Watanabe, Takashi Taniguchi, Jaroslav Fabian, Christian Schonenberger, Peter Makk, Szabolcs Csonka
Summary: Van der Waals heterostructures composed of multiple few layer crystals can be used to engineer novel materials with predefined properties. For example, weakly coupling graphene to materials with large spin-orbit coupling allows for a significant spin-orbit coupling to be induced in graphene via proximity effects. The interlayer distance can be changed via hydrostatic pressure to enhance the interlayer coupling, as demonstrated in measurements on a graphene/WSe2 heterostructure exposed to increasing pressure.
NPJ 2D MATERIALS AND APPLICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Simon Zihlmann, Peter Makk, Mirko K. Rehmann, Lujun Wang, Mate Kedves, David I. Indolese, Kenji Watanabe, Takashi Taniguchi, Dominik M. Zumbuehl, Christian Schoenenberger
Article
Chemistry, Multidisciplinary
Anna Nyary, Agnes Gubicza, Jan Overbeck, Laszlo Posa, Peter Makk, Michel Calame, Andras Halbritter, Miklos Csontos
NANOSCALE ADVANCES
(2020)
Article
Physics, Multidisciplinary
Matyas Kocsis, Oleksandr Zheliuk, Peter Makk, Endre Tovari, Peter Kun, Oleg Evgenevich Tereshchenko, Konstantin Aleksandrovich Kokh, Takashi Taniguchi, Kenji Watanabe, Jianting Ye, Szabolcs Csonka
Summary: The study demonstrates a method to tune the nonreciprocal response of thin BiTeBr flakes by more than 400% using ionic liquid gating through a thin protective layer of hexagonal boron nitride. The use of a few-atomic-layer-thick van der Waals protection layer enables ionic gating of chemically sensitive exotic nanocrystals.
PHYSICAL REVIEW RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Laetitia Bardet, Herve Roussel, Stefano Saroglia, Masoud Akbari, David Munoz-Rojas, Carmen Jimenez, Aurore Denneulin, Daniel Bellet
Summary: The thermal instability of silver nanowires leads to increased electrical resistance in AgNW networks. Understanding the relationship between structural and electrical properties of AgNW networks is crucial for their integration as transparent electrodes in flexible optoelectronics. In situ X-ray diffraction measurements were used to study the crystallographic evolution of Ag-specific Bragg peaks during thermal ramping, revealing differences in thermal and structural transitions between bare and SnO2-coated AgNW networks.
Article
Chemistry, Multidisciplinary
Nathalia Cancino-Fuentes, Arnau Manasanch, Joana Covelo, Alex Suarez-Perez, Enrique Fernandez, Stratis Matsoukis, Christoph Guger, Xavi Illa, Anton Guimera-Brunet, Maria V. Sanchez-Vives
Summary: This study provides a comprehensive characterization of graphene-based solution-gated field-effect transistors (gSGFETs) for brain recordings, highlighting their potential clinical applications.
Article
Chemistry, Multidisciplinary
Sikandar Aftab, Hailiang Liu, Dhanasekaran Vikraman, Sajjad Hussain, Jungwon Kang, Abdullah A. Al-Kahtani
Summary: This study examines the effects of hybrid nanoparticles made of NiO@rGO and NiO@CNT on the active layers of polymer solar cells and X-ray photodetectors. The findings show that these hybrid nanoparticles can enhance the charge carrier capacities and exciton dissociation properties of the active layers. Among the tested configurations, the NiO@CNT device demonstrates superior performance in converting sunlight into electricity, and achieves the best sensitivity for X-ray detection.
Article
Chemistry, Multidisciplinary
Hyo Jung Shin, Seung Gyu Choi, Fengrui Qu, Min-Hee Yi, Choong-Hyun Lee, Sang Ryong Kim, Hyeong-Geug Kim, Jaewon Beom, Yoonyoung Yi, Do Kyung Kim, Eun-Hye Joe, Hee-Jung Song, Yonghyun Kim, Dong Woon Kim
Summary: This study investigates the role of SOX9 in reactive astrocytes following ischemic brain damage using a PLGA nanoparticle plasmid delivery system. The results demonstrate that PLGA nanoparticles can reduce ischemia-induced neurological deficits and infarct volume, providing a potential opportunity for stroke treatment.
Article
Chemistry, Multidisciplinary
Anurag Chaudhury, Koushik Debnath, Nikhil R. Jana, Jaydeep K. Basu
Summary: The study investigates the interaction between nanoparticles and cell membranes, and identifies key parameters, including charge, crowding, and membrane fluidity, that determine the adsorbed concentration and unbinding transition of nanoparticles.
Article
Chemistry, Multidisciplinary
Sina Sadeghi, Fazel Bateni, Taekhoon Kim, Dae Yong Son, Jeffrey A. Bennett, Negin Orouji, Venkat S. Punati, Christine Stark, Teagan D. Cerra, Rami Awad, Fernando Delgado-Licona, Jinge Xu, Nikolai Mukhin, Hannah Dickerson, Kristofer G. Reyes, Milad Abolhasani
Summary: In this study, an autonomous approach for the development of lead-free metal halide perovskite nanocrystals is presented, which integrates a modular microfluidic platform with machine learning-assisted synthesis modeling. This approach enables rapid and optimized synthesis of copper-based lead-free nanocrystals.
Article
Chemistry, Multidisciplinary
Zahir Abbas, Nissar Hussain, Surender Kumar, Shaikh M. Mobin
Summary: The rational construction of free-standing and flexible electrodes for electrochemical energy storage devices is an emerging research focus. In this study, a redox-active metal-organic framework (MOF) was prepared on carbon nanofibers using an in situ approach, resulting in a flexible electrode with high redox-active behavior and unique properties such as high flexibility and lightweight. The prepared electrode showed excellent cyclic retention and rate capability in supercapacitor applications. Additionally, it could be used as a freestanding electrode in flexible devices at different bending angles.
Article
Chemistry, Multidisciplinary
Lishan Zhang, Xiaoting Zhang, Hui Ran, Ze Chen, Yicheng Ye, Jiamiao Jiang, Ziwei Hu, Miral Azechi, Fei Peng, Hao Tian, Zhili Xu, Yingfeng Tu
Summary: Photodynamic therapy (PDT) is a promising local treatment modality in cancer therapy, but its therapeutic efficacy is restricted by ineffective delivery of photosensitizers and tumor hypoxia. In this study, a phototactic Chlorella-based near-infrared (NIR) driven green affording-oxygen microrobot system was developed for enhanced PDT. The system exhibited desirable phototaxis and continuous oxygen generation, leading to the inhibition of tumor growth in mice. This study demonstrates the potential of using a light-driven green affording-oxygen microrobot to enhance photodynamic therapy.
Article
Chemistry, Multidisciplinary
Yujin Li, Jing Xu, Xinqi Luo, Futing Wang, Zhong Dong, Ke-Jing Huang, Chengjie Hu, Mengyi Hou, Ren Cai
Summary: In this study, hollow heterostructured materials were constructed using an innovative template-engaged method as cathodes for zinc-ion batteries. The materials exhibited fast Zn2+ transport channels, improved electrical conductivity, and controlled volume expansion during cycling. The designed structure allowed for an admirable reversible capacity and high coulombic efficiency.
Article
Chemistry, Multidisciplinary
Paritosh Mahato, Shashi Shekhar, Rahul Yadav, Saptarshi Mukherjee
Summary: This study comprehensively elucidates the role of the core and electrostatic surface of metal nanoclusters in catalytic reduction reactions. The electrostatic surface dramatically modulates the reactivity of metal nanoclusters.
Article
Chemistry, Multidisciplinary
Pei Liu, Mengdi Liang, Zhengwei Liu, Haiyu Long, Han Cheng, Jiahe Su, Zhongbiao Tan, Xuewen He, Min Sun, Xiangqian Li, Shuai He
Summary: This study demonstrates a simple and environmentally-friendly method for the synthesis of zinc oxide nanozymes (ZnO NZs) using wasted hop extract (WHE). The WHE-ZnO NZs exhibit exceptional peroxidase-like activity and serve as effective catalysts for the oxidation of 3,3,5,5-tetramethylbenzidine (TMB) in the presence of hydrogen peroxide (H2O2). In addition, a straightforward colorimetric technique for detecting both H2O2 and glucose was developed using the WHE-ZnO NZs as peroxidase-like catalysts.
Article
Chemistry, Multidisciplinary
Hyunkyu Oh, Young Jun Lee, Eun Ji Kim, Jinseok Park, Hee-Eun Kim, Hyunsoo Lee, Hyunjoo Lee, Bumjoon J. Kim
Summary: Mesoporous carbon particles have unique structural properties that make them suitable as support materials for catalytic applications. This study investigates the impact of channel nanostructures on the catalytic activity of porous carbon particles (PCPs) by fabricating PCPs with controlled channel exposure on the carbon surface. The results show that PCPs with highly open channel nanostructures exhibit significantly higher catalytic activity compared to those with closed channel nanostructures.
Article
Chemistry, Multidisciplinary
Yunjie Lu, Zhaohui Li, Zewei Li, Shihao Zhou, Ning Zhang, Jianming Zhang, Lu Zong
Summary: A tough, long-lasting adhesive and highly conductive nanocomposite hydrogel (PACPH) was fabricated via the synergy of interfacial entanglement and adhesion group densification. PACPH possesses excellent mechanical properties, interfacial adhesion strength, and conductivity, making it a promising material for long-term monitoring of human activities and electrocardiogram signals.
Article
Chemistry, Multidisciplinary
Zichao Wei, Audrey Vandergriff, Chung-Hao Liu, Maham Liaqat, Mu-Ping Nieh, Yu Lei, Jie He
Summary: We have developed a simple method to prepare polymer-grafted plasmonic metal nanoparticles with pH-responsive surface-enhanced Raman scattering. By using pH-responsive polymers as ligands, the aggregation of nanoparticles can be controlled, leading to enhanced SERS. The pH-responsive polymer-grafted nanoparticles show high reproducibility and sensitivity in solution, providing a novel approach for SERS without the need for sample pre-concentration.
Article
Chemistry, Multidisciplinary
Melis Ozge Alas Colak, Ahmet Gungor, Merve Buldu Akturk, Emre Erdem, Rukan Genc
Summary: This research investigates the effect of functionalizing carbon dots with hydroxyl polymers on their performance as electrode materials in a supercapacitor. The results show that the functionalized carbon dots exhibit excellent electrochemical performance and improved stability.
