Article
Multidisciplinary Sciences
Zheyi Lu, Yang Chen, Weiqi Dang, Lingan Kong, Quanyang Tao, Likuan Ma, Donglin Lu, Liting Liu, Wanying Li, Zhiwei Li, Xiao Liu, Yiliu Wang, Xidong Duan, Lei Liao, Yuan Liu
Summary: A dry dielectric integration strategy enables the transfer of wafer-scale and high-kappa dielectrics on top of 2D semiconductors. An ultra-thin buffer layer is used to pre-deposit sub-3 nm thin Al2O3 or HfO2 dielectrics, which are then mechanically dry-transferred on top of MoS2 monolayers. The transferred ultra-thin dielectric film exhibits wafer-scale flatness and uniformity without any cracks, showing high capacitance, low leakage currents, and excellent transistor properties.
NATURE COMMUNICATIONS
(2023)
Article
Energy & Fuels
Hongyan Xu, Nasrin Siraj Lopa, Mohammad Karbalaei Akbari, Di Wu, Jie Hu, Serge Zhuiykov
Summary: Two-dimensional conformal SnO2-Ga2O3 n-p heterostructures were fabricated on a wafer scale using atomic layer deposition. After annealing at 250 degrees C for 1 h in air, the heterostructures exhibited a high specific capacitance of 167 F g-1 at a current density of 7.69 A g-1. Even after 10,000 continuous cycles, the sub-10 nm thick heterostructures demonstrated a high capacitance retention of -92.55%. These findings highlight the potential of ultra-thin 2D SnO2-Ga2O3 heterostructures for high-performance energy storage devices.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Multidisciplinary
Zhi-Jun Zhao, Junseong Ahn, Soon Hyoung Hwang, Jiwoo Ko, Yongrok Jeong, Moonjeong Bok, Hyeok-Joong Kang, Jungrak Choi, Sohee Jeon, Inkyu Park, Jun-Ho Jeong
Summary: A simple method proposed in this study allows for the fabrication of large-area, ultra-small nanogaps on a flexible substrate, with the ability to easily control the gap size and produce 3D multilayer nanostructures and nanocomposites without the need for post-treatment. This method offers a fast, simple, and cost-effective approach to nanofabrication with potential applications in flexible electronics and soft actuators.
Review
Chemistry, Multidisciplinary
William Chiappim, Benedito Botan Neto, Michaela Shiotani, Julia Karnopp, Luan Goncalves, Joao Pedro Chaves, Argemiro da Silva Sobrinho, Joaquim Pratas Leitao, Mariana Fraga, Rodrigo Pessoa
Summary: The increasing demand for miniaturized devices has led to high importance and requirements for nanofabrication technologies that are of high-quality, low temperatures, and low cost. In recent years, the development of atomic layer deposition (ALD) processes has sparked interest in their use in advanced electronic and nano/microelectromechanical systems (NEMS/MEMS) device manufacturing. Non-thermal plasma (NTP) technology has emerged as a significant technique that expands the process window of ALD and allows the fabrication of various nanomaterials at lower temperatures, enabling the coverage of thermosensitive substrates with good formability and uniformity. This review article comprehensively describes the impact of NTP on the ALD universe and its applications in device fabrication. It also presents the integration of NTP and ALD technologies to form the plasma-assisted ALD (PA-ALD) technique, which has been successfully used in nanofabrication and surface modification. The advantages and limitations of this technique are discussed, along with the introduction of atomic layer etching (ALE) technique, another development of the NTP and ALD junction that has gained attention for plasma-assisted nanofabrication.
Article
Materials Science, Multidisciplinary
Damiano La Zara, Fuweng Zhang, Feilong Sun, Maximilian R. Bailey, Michael J. Quayle, Gunilla Petersson, Staffan Folestad, J. Ruud van Ommen
Summary: The text discusses a surface nanoengineering method to tune the wettability of drug powders, from high hydrophilicity to superhydrophobicity, for inhaled drugs like budesonide. This allows for improved bioavailability and enhanced dispersion of formulations, showing the potential for controlling powder wettability in various pharmaceutical dosage forms.
APPLIED MATERIALS TODAY
(2021)
Article
Chemistry, Multidisciplinary
Valerio Di Palma, Andrea Pianalto, Michele Perego, Graziella Tallarida, Davide Codegoni, Marco Fanciulli
Summary: In vitro and in vivo stimulation and recording of neuron action potential can be achieved using microelectrode arrays made of IrO2, a conductive oxide known for its biocompatibility and charge injection capabilities. This study presents the growth of nanocrystalline rutile IrO2 using a new plasma-assisted ALD process, and provides a comprehensive characterization of its morphological, structural, physical, chemical, and electrochemical properties. The results demonstrate that IrO2 grown by PA-ALD is an excellent material for neuroelectronic applications, with high charge injection capacity and double-layer capacitance.
Article
Chemistry, Multidisciplinary
Qing Chen, Marie Betker, Constantin Harder, Calvin J. Brett, Matthias Schwartzkopf, Nils M. Ulrich, Maria E. Toimil-Molares, Christina Trautmann, L. Daniel Soederberg, Christian L. Weindl, Volker Koerstgens, Peter Mueller-Buschbaum, Mingming Ma, Stephan Roth
Summary: This study reports a novel strategy of utilizing cellulose nanofibril (CNF) as a template to fabricate TiO2/CNF thin films with tailored morphology and crystallinity for enhanced SERS sensitivity. By combining atomic layer deposition and thermal annealing, polymorphous TiO2/CNF thin films with defined morphology were achieved, showing a high enhancement factor in semiconductor metal oxide nanomaterial (SMON)-based SERS substrates. The improved SERS sensitivity is attributed to the cooperative modulation of CNF template morphology and TiO2 crystalline state.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Biochemistry & Molecular Biology
Homan Kang, Sinyoung Jeong, Jin-Kyoung Yang, Ahla Jo, Hyunmi Lee, Eun Hae Heo, Dae Hong Jeong, Bong-Hyun Jun, Hyejin Chang, Yoon-Sik Lee
Summary: This study presents a template-assisted method for synthesizing nanogap shell structures for biomolecular detections based on surface-enhanced Raman scattering. The fabricated silver nanogap shells (Ag NGSs) showed high enhancement factor and good signal uniformity, enabling multiplex biomolecular detection and imaging. The research demonstrates the potential of highly sensitive Ag NGS nanoprobes for point-of-care diagnostics and appropriate treatment options.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Materials Science, Multidisciplinary
Ho Jae Shim, Jin Seok Kim, Won Da Ahn, Jin Hyun Choe, Donghyuk Oh, Kyung Soo Kim, Sung Chul Lee, Sung Gyu Pyo
Summary: High-performance transistors with high electron mobility and reliability are essential for next-generation displays. Researchers focus on oxide thin film transistors, with ZnO being a popular choice due to its wide band gap and transparency to visible light. In this study, ZnO thin films were deposited using atomic layer deposition at low temperatures, and analyzed using X-ray diffraction and resonant Raman spectroscopy for structural characterization.
ELECTRONIC MATERIALS LETTERS
(2021)
Article
Chemistry, Physical
Wei Zhang, Tianxing Zheng, Bin Ai, Panpan Gu, Yuduo Guan, Yu Wang, Zhiyuan Zhao, Gang Zhang
Summary: Au-P-Au-coupled gold nanoparticle platforms with multiple nanogaps were fabricated using nanoskiving and polymer-assisted assembly. The platform showed strong electric field enhancement due to the confinement of incident light, leading to significant surface-enhanced Raman scattering performance and sensitive detection of glucose.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Li Sun, Jiayue Xie, Guanglu Lei, Xianghong Liu, Jianmin Ma, Jun Zhang
Summary: TiO2@Void@SnO2 double-shell hollow nanotubes were synthesized to enhance the electrochemical properties of Sn-based anode materials, showing stable capacity and long cycling stability. The unique structure effectively accommodates volume change and prevents SnO2 pulverization.
Article
Chemistry, Multidisciplinary
Hui He, Lingli Zhou, Zhanchen Guo, Pengfei Li, Song Gao, Zhen Liu
Summary: A novel dual biomimetic recognition-driven plasmonic nanogap-enhanced Raman scattering strategy was reported for ultrasensitive protein fingerprinting and quantitation. By trapping target proteins into plasmonic nanogaps, ultra-high Raman signal amplification was achieved, along with a ratiometric assay for robust quantitation.
Article
Chemistry, Multidisciplinary
Lei Liu, Jianlun Guo, Youqiang Xing, Ze Wu
Summary: This study aims to achieve an ultrasensitive SERS platform by fabricating ordered CdS/MoS2@Au nanoparticles nanopillars with high-density active hotspots through precise adjustment of pillar diameter and obtaining the most favorable gap size between the pillars.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Zhenzhen Zhang, Assaf Simon, Clarissa Abetz, Martin Held, Anke-Lisa Hohme, Erik S. Schneider, Tamar Segal-Peretz, Volker Abetz
Summary: The study demonstrates a versatile top-down approach to produce high-performance membranes using isoporous block copolymer membranes and metal oxide growth, enabling high selectivity molecular separation.
ADVANCED MATERIALS
(2021)
Article
Physics, Applied
M. Jullien, C. S. Chang, L. Badie, S. Robert, M. Hehn, D. Lacour, F. Montaigne
Summary: Cobalt thin films were grown using plasma-enhanced atomic layer deposition, with investigations into their electrical and magnetic properties as a function of growth temperature. It was found that the magnetic and resistivity properties of the films varied with growth temperature, with an optimal growth temperature of 340 degrees C. The study suggests that atomic layer deposition may be a viable alternative for depositing ferromagnetic layers in spintronics applications.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Physics, Applied
Yechao Ling, Yong Hu, Xiaodan Chi, Jiawei Chen, Haobo Wang, Ben Niu, Di Wu, Mingxiang Xu, Zhida Han, Jun Du, Qingyu Xu
Summary: Heusler alloys exhibit anisotropic magnetostructural transitions under epitaxial strain, showing different magnetic behaviors in different orientations. This study demonstrates the influence of substrate on the magnetic properties of Heusler alloys and provides insights for designing novel magnetic devices.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Yuqing Zhou, Changqing Guo, Guohua Dong, Haixia Liu, Ziyao Zhou, Ben Niu, Di Wu, Tao Li, Houbing Huang, Ming Liu, Tai Min
Summary: In this study, zigzag wrinkle morphology was fabricated on inorganic thin films to modulate ferroelectric domains and create a superstructure with periodic surface charge distribution. This unique structure can be switched using strain gradient and provides a means to regulate cells and polar molecules in physiological and bioelectric applications.
Article
Physics, Applied
Zhongnan Xi, Yao Li, Pengxiang Hou, Peijie Jiao, Honghe Ding, Fengchun Hu, Jun Hu, Yu Deng, Yurong Yang, Di Wu
Summary: In this study, the coercive field of NiCo2O4 films was systematically controlled by varying the deposition temperature while maintaining the perpendicular magnetic anisotropy. The changes in cation valence and coordination in the films were investigated using X-ray photoelectron emission and X-ray absorption spectroscopy, allowing for a better understanding of their magnetic and transport characteristics.
PHYSICAL REVIEW APPLIED
(2022)
Article
Multidisciplinary Sciences
Xiaoyi Xu, Tianxin Wang, Pengcheng Chen, Chao Zhou, Jianan Ma, Dunzhao Wei, Huijun Wang, Ben Niu, Xinyuan Fang, Di Wu, Shining Zhu, Min Gu, Min Xiao, Yong Zhang
Summary: Lithium niobate (LiNbO3) is a promising material for reconfigurable three-dimensional ferroelectric domain engineering, and recent breakthroughs in nanophotonics have advanced the development of high-speed electro-optic modulators, frequency combs, and broadband spectrometers. A non-reciprocal near-infrared laser-writing technique is demonstrated for nanoscale domain engineering in LiNbO3, providing a pathway for controllable domain engineering in transparent ferroelectric crystals.
Article
Chemistry, Physical
Jin Lei, Song Sun, Yuchen Li, Ping Xu, Chang Liu, Shaozhong Chang, Genglai Yang, Shuang Chen, Wei Fa, Di Wu, Ai-Dong Li
Summary: Researchers have constructed an organic-inorganic hybrid resistive random-access memory using a nanoporous zinc-based hydroquinone (Zn-HQ) thin film. The Pt/Zn-HQ/Ag sandwich structure was used for the device. The nanoporous Zn-HQ thin film, fabricated through one-step molecular layer deposition, enables lower operation voltages, higher on/off ratio, multilevel storage capability, and excellent endurance/retention properties.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Physics, Applied
Zhijie Liu, Xinyu Wang, Xingyue Ma, Yurong Yang, Di Wu
Summary: We investigate the doping effects on the ferroelectric properties of Sc-doped AlN and B-doped AlN using first-principles methods. Our results show that the energy barrier against polarization switching decreases with increasing doping concentration, leading to the emergence of ferroelectricity in doped AlN. However, when the doping concentration exceeds a critical value, the ferroelectric phase transforms into paraelectric phases, making it ineffective to reduce coercivity by increasing doping concentration. Furthermore, different nonpolar structures appear in the ferroelectric switching pathway, resulting in different switching features in doped AlN.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Multidisciplinary
Haoying Sun, Jiahui Gu, Yongqiang Li, Tula R. Paudel, Di Liu, Jierong Wang, Yipeng Zang, Chengyi Gu, Jiangfeng Yang, Wenjie Sun, Zhengbin Gu, Evgeny Y. Tsymbal, Junming Liu, Houbing Huang, Di Wu, Yuefeng Nie
Summary: By applying uniaxial strain, we achieved pure in-plane polarized ferroelectricity in ultrathin SrTiO3 membranes, which allows for the investigation of ferroelectric size effects without the interference of the depolarization field. Our study reveals that the stability of ferroelectricity is influenced by the thickness-dependent dipole-dipole interactions within the transverse Ising model.
PHYSICAL REVIEW LETTERS
(2023)
Review
Physics, Applied
Mohammad Yazdani-Asrami, Wenjuan Song, Antonio Morandi, Giovanni De Carne, Joao Murta-Pina, Anabela Pronto, Roberto Oliveira, Francesco Grilli, Enric Pardo, Michael Parizh, Boyang Shen, Tim Coombs, Tiina Salmi, Di Wu, Eric Coatanea, Dominic A. Moseley, Rodney A. Badcock, Mengjie Zhang, Vittorio Marinozzi, Nhan Tran, Maciej Wielgosz, Andrzej Skoczen, Dimitrios Tzelepis, Sakis Meliopoulos, Nuno Vilhena, Guilherme Sotelo, Zhenan Jiang, Veit Grosse, Tommaso Bagni, Diego Mauro, Carmine Senatore, Alexey Mankevich, Vadim Amelichev, Sergey Samoilenkov, Tiem Leong Yoon, Yao Wang, Renato P. Camata, Cheng-Chien Chen, Ana Maria Madureira, Ajith Abraham
Summary: This paper presents a roadmap for applying AI techniques and big data (BD) in various aspects of superconducting applications, such as modelling, design, monitoring, manufacturing, and operation. Short articles are provided to outline potential applications and solutions, aiming to assist researchers, engineers, and manufacturers in understanding the feasibility of using AI and BD techniques to tackle challenges in superconductivity. These potential futuristic routes and their related materials/technologies are considered for a time frame of 10-20 years.
SUPERCONDUCTOR SCIENCE & TECHNOLOGY
(2023)
Article
Physics, Applied
Yajie Han, Zhijie Liu, Zhiyu Liu, Hongying Chen, Pengxiang Hou, Jiayi Li, Yuqi Wang, Yu Deng, Yurong Yang, Di Wu
Summary: We have deposited BMN-modified BFO thin films on (001)-oriented SrTiO3 substrates buffered with La2/3Sr1/3MnO3 electrodes and observed a large remanent polarization of 116.8 mu C cm-2. Experimental analyses and first-principles calculations show that the inclusion of 10 mol % BMN increases both the intrinsic and extrinsic contributions, resulting in a doubled polarization. Compared to rhombohedral BFO films, the epitaxial BFO-BMN films exhibit a more tetragonal-like structure and a unique rotated twinning-domain structure, enhancing the out-of-plane polarization.
PHYSICAL REVIEW APPLIED
(2023)
Article
Physics, Multidisciplinary
Yao Li, Pengxiang Hou, Zhongnan Xi, Yeming Xu, Yiren Liu, Hao Tian, Jiayi Li, Yurong Yang, Yu Deng, Di Wu
Summary: Charge transfer in perovskite oxide heterostructures can disrupt the delicate balance among charge, spin, orbital, and lattice order at the interface, resulting in exotic phenomena not seen in bulk materials. The authors observed opposite charge transfer directions in two 3d/5d perovskite oxide heterostructures (SrIrO3/LaNiO3 and SrIrO3/NdNiO3), investigated the resulting interfacial orbital and lattice reconstructions, and discussed their effects on transport and magnetic characteristics.
COMMUNICATIONS PHYSICS
(2023)
Article
Physics, Applied
Zhongnan Xi, Yuqi Wang, Yang Wu, Pengxiang Hou, Peijie Jiao, Yu Deng, Yurong Yang, Di Wu
Summary: We reported an unusual thickness dependence of perpendicular magnetic anisotropy (PMA) in epitaxially deposited spinel NiCo2O4 (NCO) films on MgAl2O4 (001) single crystalline substrates, which is stronger in thinner films. The effective PMA field increases from about 3 T in 23.0 nm-thick films to about 7 T in 4.5 nm-thick films. X-ray absorption spectra reveal an inhomogeneous distribution of Co2+ cations along the film's normal, with a higher concentration near the film/substrate interface. X-ray linear dichroism spectra indicate that the PMA in NCO films is associated with the x(2)-y(2) orbital of Co cations at the tetrahedral sites. This work demonstrates the potential of ultrathin NCO films in all-oxide spintronic devices.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Xin-Yue Zhang, Qiang Ren, Chen Wang, Lin Zhu, Wen-Juan Ding, Yan-Qiang Cao, Wei-Ming Li, Di Wu, Ai-Dong Li
Summary: In this study, SnO2, ZnO thin film, and SnO2/ZnO composite thin film hydrogen sensors were fabricated using atomic layer deposition (ALD). The effects of ALD cycles and heat treatment temperatures on the sensing properties were investigated. The SnO2/ZnO composite film sensor exhibited the best hydrogen-sensing performance, attributed to the synergistic effect of the SnO2-ZnO heterojunction and oxygen vacancies in the SnO2 film. ALD may be a feasible strategy for constructing highly sensitive hydrogen sensors based on Si for micro-electromechanical system applications.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Jin Lei, Song Sun, Yuchen Li, Ping Xu, Chang Liu, Shaozhong Chang, Genglai Yang, Shuang Chen, Wei Fa, Di Wu, Ai-Dong Li
Summary: A resistive random-access memory based on a nanoporous zinc-based hydroquinone thin film was created with a Pt/ZnHQ/Ag sandwich structure. These devices exhibit electroforming-free bipolar resistive switching characteristic with lower operation voltages and higher on/off ratio above 10(2). The nanoporous hybrid devices also show multilevel storage capability and excellent endurance/retention properties. The connection and disconnection of Ag conductive filaments in the nanoporous Zn-HQ thin film follow the electrochemical metallization mechanism, which is facilitated by the existence of nanopores.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Yaorong Luo, Hao Tian, Xu Li, Lan Chen, Yurong Yang, Di Wu
Summary: Using first-principles and particle swarm optimization methods, this study systematically investigated the crystal structural stability and electrical properties of AGeX(3) compounds (A = Li, Na, K, Rb, Cs; X = F, Cl, Br, I). Various new structural phases and their corresponding electrical properties were discovered, such as the P2(1)2(1)2(1) perovskite phase with intrinsic small polar vortices and antivortices in KGeCl3 and KGeBr3, which may lead to a gyrotropic phase transition. Additionally, ferroelectric phases were found in R3c (LiGeX3, NaGeX3), R3m (CsGeX3) and Pna2(1) (KGeX3, RbGeX3), including the new Pna2(1) phase with both proper and hybrid improper polarization. These findings highlight the promising applications of Ge-based halide compounds in ferroics and piezoelectrics.
Article
Materials Science, Multidisciplinary
Xingyue Ma, Yurong Yang, L. Bellaiche, Di Wu
Summary: The study found that for ferroelectric PST, the electrocaloric coefficient reaches its maximum at a critical electric field for any specific temperature above the Curie temperature, which is exactly the threshold for polar nanoregions to propagate throughout the sample through percolation. This percolation-induced maximal ECE occurs for all degrees of chemical ordering, suggesting a novel mechanism for improving ECE.
