Article
Chemistry, Physical
Oleg Novodvorsky, Liubov Parshina, Olga Khramova, Dmitriy Gusev, Alexander Polyakov, Elena Cherebilo
Summary: Amorphous NbOx thin films with nanocrystallites were synthesized by laser and may be used as active regions in volatile memristors. The effects of oxygen pressure and laser wavelength on the properties of the films were studied. Optimal conditions for stable phase formation were determined. Volatile memristors with Nb/NbO?/Nb2O5/Pt/c-Al2O3 structure showed long-term stability.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Vanessa Proust, Quentin Kirscher, Thi Kim Ngan Nguyen, Lisa Obringer, Kento Ishii, Ludivine Rault, Valerie Demange, David Berthebaud, Naoki Ohashi, Tetsuo Uchikoshi, Dominique Berling, Olivier Soppera, Fabien Grasset
Summary: The objective of this study was to develop simple and easy methods to prepare polymorphic HfO2 thin film materials with the best balance of patterning potential, reproducibility and stability. Nanostructured HfO2 thin films were synthesized by two different methods: deep ultraviolet (DUV) photolithography and electrophoretic deposition (EPD) of HfO2 nanoparticles. The morphology, composition and crystallinity of the HfO2 nanoparticles and thin films were investigated, and the results showed that both DUV photolithography and EPD are suitable methods to prepare controllable and tunable HfO2 nanostructures.
Article
Chemistry, Multidisciplinary
Tomota Nagaura, Aditya Ashok, Azhar Alowasheeir, Arya Vasanth, Minsu Han, Yusuke Yamauchi
Summary: A robust platform for synthesizing mesoporous Bi2Se3 films with uniform pore sizes via electrodeposition has been demonstrated. The pore size can be precisely adjusted to 9 and 17 nm by controlling the length of the block copolymer. The introduction of porosity significantly enhances the tunneling current and conductivity of Bi2Se3 films, indicating the dependence of their properties on pore structure and surface area.
Article
Environmental Sciences
Irum Shaheen, Iftikhar Hussain, Taghazal Zahra, Roomia Memon, Asma A. Alothman, Mohamed Ouladsmane, Anjum Qureshi, Javed H. Niazi
Summary: In this study, a cost-effective and efficient electrophoretic deposition (EPD) method was used to fabricate a hybrid supercapacitor electrode. ZnO/CuO and ZnO/CuO/rGO heterostructures were prepared using sol-gel synthesis and electrophoretically deposited on ITO substrate. The ZnO/CuO/rGO heterostructure electrode exhibited higher specific capacitance and lower internal resistance, indicating its potential for energy storage as a supercapacitor.
Article
Nanoscience & Nanotechnology
Reetendra Singh, Pallellappa Chithaiah, C. N. R. Rao
Summary: This study demonstrates a simple chemical vapor deposition method for the direct growth of crystalline NbO2 films using a freshly prepared Nb-hexadecylamine (Nb-HDA) complex. X-ray diffraction and X-ray photoelectron spectroscopy confirm the NbO2 phase with a distorted rutile body-centered-tetragonal structure and the +4 oxidation state. This method offers a cost-effective process for growing NbO2 films without the need for post-reduction steps.
Article
Chemistry, Multidisciplinary
Dominika Marcin Behunova, George Gallios, Vladimir Girman, Hristo Kolev, Maria Kanuchova, Silvia Dolinska, Miroslava Vaclavikova
Summary: The study demonstrated the deposition of graphene oxide on a stainless steel substrate and its potential environmental applications. Various characterization techniques were used to assess the structure, morphology, and properties of the material, showing that the morphology and stability of the structures are related to the pre-treatment of the stainless steel substrate. This approach offers a new route for the facile fabrication of advanced electrode coatings with potential environmental applications.
Article
Materials Science, Multidisciplinary
E. G. Fridriksson, T. K. Tryggvason, U. B. Arnalds, A. S. Ingason, F. Magnus
Summary: In this study, different crystal phases of niobium oxides films were successfully synthesized by reactive dc magnetron sputtering and vacuum annealing, and the crystal formation was controlled by adjusting the oxygen flow and annealing temperature.
Article
Chemistry, Physical
Imran Deen, Gurpreet Singh Selopal, Zhiming M. Wang, Federico Rosei
Summary: Coatings with bioactive and biodegradable properties were fabricated using electrophoretic deposition with composite collagen, chitosan, and copper-doped phosphate glass. Variations in the coating composition were achieved by altering the concentrations of collagen and chitosan in the solutions, as well as by depositing phosphate glass with different levels of copper dopant. The ability to deposit these polymer-phosphate glass coatings offers potential for tailored orthopaedic implants with enhanced bioactivity and reduced risk of rejection.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Tomota Nagaura, Hoang-Phuong Phan, Victor Malgras, Tuan-Anh Pham, Hyunsoo Lim, Aditya Ashok, Jeonghun Kim, Jungmok You, Nam-Trung Nguyen, Jongbeom Na, Yusuke Yamauchi
Summary: This study presents a new synthesis route for mesoporous semiconductors through soft-template-assisted electrochemical deposition. The resulting films exhibit homogeneous distribution of mesopores and high sensitivity in photodetection, demonstrating the versatility and potential for applications in nanostructured semiconductors.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Chang Gao, Yujing Ran, Qian Guo, Tianrun Wang, Huiping Lu, Zhaotan Jiang, Zhi Wang
Summary: NbNx films were prepared by dual ion beam sputter deposition to modulate their structural and dielectric properties. Assisting ions can improve crystallinity, reduce energy loss, and lead to tunable dual epsilon-near-zero behavior in the films. Tailoring plasmonic properties with assisting ions allows NbNx films to be applied in various fields.
SURFACES AND INTERFACES
(2021)
Article
Chemistry, Physical
Krishna R. Panta, Christine A. Orme, Bret N. Flanders
Summary: This study proposes a novel method for correlating mass and charge transfer kinetics during electrophoretic deposition of nanocrystal films. A double quartz crystal microbalance combined with simultaneous current-measurement is used. The research supports a multistep process for film formation, and the correlation of mass and charge transfer enables the quantification of various parameters for film growth.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Analytical
Andrei Pligovka, Alexander Poznyak, Malgorzata Norek
Summary: Three types of niobia nanostructured films were formed using different methods and their properties were studied. The films exhibited varying refractive index characteristics and reflectance spectrum peaks, which could be used for creating photonic crystals.
Article
Engineering, Electrical & Electronic
Alexander C. Kozen, Jeffrey M. Woodward, Laura B. Ruppalt, Hans Cho, Carl A. Ventrice, Andrew H. Rowley, Nicole Zhe, Alex Mesiti, Emma Sargent, James H. Michels, Zachary R. Robinson
Summary: Neuromorphic computational devices built from memristive materials provide a potential path towards improved power and computational efficiency in a merged biomimetic and CMOS architecture. The key is to develop materials that can be reliably engineered into neuromorphic devices and integrated with CMOS platforms, and niobium dioxide is an ideal candidate for future neuromorphic electronics.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Alexander C. Kozen, Jeffrey M. Woodward, Laura B. Ruppalt, Hans Cho, Carl A. Ventrice, Andrew H. Rowley, Nicole Zhe, Alex Mesiti, Emma Sargent, James H. Michels, Zachary R. Robinson
Summary: Doping niobium dioxide with zinc lowers the initial crystallization temperature, making it a promising material for neuromorphic integration with CMOS devices, thus improving power and computational efficiency.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
S. Sugumaran, T. A. Divya, R. K. Sivaraman, C. S. Bellan, K. C. Sekhar, M. F. Jamlos
Summary: Nanostructured LaAlO3 thin films with thicknesses of 50 nm, 100 nm, and 150 nm were successfully prepared using thermal evaporation technique. The films exhibited a La-Al-O bond, perovskite LaAlO3 structure, and promising electrical properties for potential applications in electronic devices in the future.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Shi-Ying Cao, Fan Ye, Ni-Ni Zhang, Yang-Long Guo, Yun Guo, Li Wang, Sheng Dai, Wang-Cheng Zhan
Summary: This study demonstrates the successful design of a bimetallic Ru-Pt catalyst for methane oxidation, which exhibits excellent stability and outstanding performance. The RuO2 species provides additional oxygen species to facilitate the redox cycle of the PtOx species, enhancing the catalyst's activity.
Article
Chemistry, Physical
Dinesh Bhalothia, Da-Wei Lee, Guan-Ping Jhao, Hsiao-Yun Liu, Yanyan Jia, Sheng Dai, Kuan-Wen Wang, Tsan-Yao Chen
Summary: This study introduces a ZnO supported Ag nanocatalyst for efficient electrochemical CO2 reduction, with high selectivity and stability. The synergistic collaboration between ZnO and Ag was found to be crucial for enhancing CO selectivity.
APPLIED SURFACE SCIENCE
(2023)
Article
Multidisciplinary Sciences
Yanyan Zhao, Sheng Dai, Ke R. Yang, Sufeng Cao, Kelly L. Materna, Hannah M. C. Lant, Li Cheng Kao, Xuefei Feng, Jinghua Guo, Gary W. Brudvig, Maria Flytzani-Stephanopoulos, Victor S. Batista, Xiaoqing Pan, Dunwei Wang
Summary: Atomically dispersed catalysts have shown high activity for selective oxidation of carbon monoxide with excess hydrogen, but their stability is not ideal. This study demonstrates that introducing a structural component to minimize the diffusion of the active metal center significantly improves stability without compromising activity. By using a dinuclear iridium heterogeneous catalyst as a study platform, two types of oxygen species, interfacial and bridge, are identified to work together for both activity and stability. This work provides important insights into the synergistic effect between the active metal center and the supporting substrate, with potential broad applications for atomically dispersed catalysts.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Engineering, Electrical & Electronic
Ling Tong, Jing Wan, Kai Xiao, Jian Liu, Jingyi Ma, Xiaojiao Guo, Lihui Zhou, Xinyu Chen, Yin Xia, Sheng Dai, Zihan Xu, Wenzhong Bao, Peng Zhou
Summary: Heterogeneous complementary field-effect transistors combine silicon-based p-type FETs and two-dimensional MoS2-based n-type FETs, addressing the mobility mismatch issue in fully silicon-based systems. The integration approach utilizes the maturity of the silicon process, low thermal budget of MoS2, and low aspect ratio of the device structures to simplify the process and reduce device degradation. A complementary FET inverter with high voltage gains and low power consumption is successfully created, and a four-inch fabrication process for the silicon-two-dimensional complementary FETs is developed.
NATURE ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Zunjian Ke, Dong He, Xingxu Yan, Wenhui Hu, Nicholas Williams, Hongxing Kang, Xiaoqing Pan, Jier Huang, Jing Gu, Xiangheng Xiao
Summary: Nitrate and nitrite are common contaminants in industrial wastewater and groundwater. The electroreduction of NOx- to produce ammonia presents a sustainable alternative to the energy-intensive Haber-Bosch process. However, the development of selective catalysts that can regulate the reaction pathway and suppress competing reactions is still lacking.
Article
Chemistry, Multidisciplinary
Yifan Ding, Zixiong Shi, Yingjie Sun, Jianghua Wu, Xiaoqing Pan, Jingyu Sun
Summary: A generic and simple material strategy has been presented to fabricate advanced mediator for improved sulfur electrochemistry. The Li-S cells derived from this strategy exhibit impressive cyclic performances and durable areal capacity, indicating the potential for rationalizing the design and modulation of reliable polysulfide mediators in Li-S batteries.
Article
Engineering, Chemical
Xuan Tang, Ming Wang, Bingjing Tang, Yunkun Zhao, Wangcheng Zhan, Yanglong Guo, Li Wang, Sheng Dai, Yun Guo
Summary: Realizing the potential benefits of nanoscale metal catalysts requires controlling their local environment and achieving highly dispersed active sites. In this study, we developed a catalyst synthesis route that targets the deposition of Pd near highly dispersed ZrOx on ZSM-5 zeolite using electrostatic interactions. The heteroatom Pd-ZrOx species formed in the zeolite catalysts were characterized by various techniques, revealing higher dispersion and lower oxygen coordination of Pd species, which enhanced the catalytic performance with a lower temperature for CH4 conversion. Our work provides a strategy to engineer highly dispersed noble metal species and regulate the local environment for tuning catalytic properties.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Engineering, Environmental
Na Kang, Yan Wang, Zhi Wen Chen, Xuan Tang, Yuanjiang Wang, Zhiyong Ding, Cheng Zhang, Sheng Dai, Chandra Veer Singh, Pengfei Xie, Mi Yan
Summary: Cu/Y-x-SSZ-13 catalysts with superior low-temperature activity and hydrothermal stability have been prepared by in situ doping of Y and subsequent ion-exchanging with Cu ions. The interaction between Y and Cu enhances the electron transfer and inhibits the aggregation of Cu sites, leading to improved performance of the catalysts.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Multidisciplinary Sciences
Ming Gao, Yongjun Jang, Lu Ding, Yunfei Gao, Sheng Dai, Zhenghua Dai, Guangsuo Yu, Wenming Yang, Fuchen Wang
Summary: In this study, the mechanisms of noncatalytic soot oxidation were investigated using in-situ transmission electron microscopy, and models applicable to different types of soot were established based on the particles oxidation behavior.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Zhinan Fu, Lizhen Wang, Weijun Zhang, Xuan Tang, Wenxin Xia, Jinxia Li, Kuanwen Wang, Lihui Zhou, Xuhong Guo, Sheng Dai
Summary: ZIF-8-derived single atom catalysts with different hollow carbon nanoarchitectures are synthesized using a polyelectrolyte brush-templated-growth approach. Fe, Co, Cu, and Pd single-atom catalysts are successfully synthesized, with Fe catalysts showing superior oxygen reduction reaction performance. The study explores the morphology and structure of the derived materials, revealing the exposure of high-quality single-atom active sites and the promotion of mass transfer in the electrochemical process.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Multidisciplinary
Yuxi Qin, Yongjun Jiang, Xinjia Wei, Yuan Ma, Huiying Liao, Qingpo Peng, Sheng Dai, Zhiqiang Wang, Xiuge Zhao, Zhenshan Hou
Summary: In this study, zirconium phosphate-supported silver nanoparticle catalysts were prepared and characterized. The catalysts showed a strong coordination interaction between silver nanoparticles and the phosphate group on zirconium phosphate, and the acidic sites on zirconium phosphate played a critical role in adsorbing nitrobenzene and activating NaBH4 for hydrogen transfer. The catalysts exhibited high activity and selectivity for the hydrogenation of substituted nitroarenes to azoxybenzene compounds, with full conversion of nitrobenzene achieved within 3 minutes and without leaching of silver species even after multiple recycling. Methanol was found to be an excellent solvent and hydrogen source in this reaction. Overall, the zirconium phosphate-supported silver nanoparticle catalysts are highly effective for selective hydrogenation of nitrobenzene to azoxybenzene compounds.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Chun Fang Wen, Min Zhou, Xuefeng Wu, Yuanwei Liu, Fangxin Mao, Huai Qin Fu, Yingli Shi, Sheng Dai, Minghui Zhu, Shuang Yang, Hai Feng Wang, Peng Fei Liu, Hua Gui Yang
Summary: A Cu(ii)-benzene-1,3,5-tricarboxylate coordination polymer (Cu-BTC-CP) with asymmetric building units, synthesized by a water etching strategy, achieves highly selective electrochemical conversion of CO2 to ethylene. The catalyst shows an ethylene faradaic efficiency of 65.2 +/- 3% at a high current density of 350 mA cm(-2) in a flow cell. Operando X-ray absorption fine structure analysis reveals the reconstruction of the catalyst to low-coordinated copper under reaction conditions, which promotes CO2 conversion to ethylene.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Multidisciplinary Sciences
Xin Yu Zhang, Zhen Xin Lou, Jiacheng Chen, Yuanwei Liu, Xuefeng Wu, Jia Yue Zhao, Hai Yang Yuan, Minghui Zhu, Sheng Dai, Hai Feng Wang, Chenghua Sun, Peng Fei Liu, Hua Gui Yang
Summary: This paper presents the discovery of a stable Cu-0/Cu2+ interface derived from copper phosphate-based electrocatalysts, which exhibits high selectivity towards C2+ products. This interface facilitates the low-energy pathway of OC-CHO coupling, leading to improved selectivity and Faradaic efficiency of C2+ products.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Zhenpeng Huang, Jihang Yu, Wenbo Li, Xuan Tang, Yanglong Guo, Yun Guo, Li Wang, Sheng Dai, Rui Liu, Wangcheng Zhan
Summary: This study focuses on the surface structure of PtFe nanoparticles on PtFe/CeO2-x catalysts and its impact on the activity and water resistance for propane oxidation. The PtFe/CeO2-O catalyst exhibited superior performance due to the cooperation among metallic Pt sites, active oxygen species, and FeOx nanoclusters. The findings of this study provide valuable insights for the development of efficient bimetallic catalysts to eliminate volatile organic compound pollutants.
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
(2024)
Review
Physics, Applied
Christopher Addiego, Wenpei Gao, Huaixun Huyan, Xiaoqing Pan
Summary: This article discusses the developments in high-resolution real-space charge distribution imaging using diffraction techniques and electron microscopy, focusing on the recent advancement of four-dimensional scanning transmission electron microscopy, electron holography, and applications to materials interfaces.
NATURE REVIEWS PHYSICS
(2023)