Article
Chemistry, Physical
Huang Ye, Yu Peng, Meng Wei, Xinyuan Zhang, Tingting Zhu, Qianwen Guan, Lina Li, Shuang Chen, Xitao Liu, Junhua Luo
Summary: This study successfully designed and synthesized a new material, SBFP, with chiral polar structures and a narrow bandgap, which exhibits the visible-near infrared optoelectronic conversion effect and enables broad-spectrum circularly polarized light detection without an external absorber or specific laser source.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Margherita Biondi, Min-Jae Choi, Zhibo Wang, Mingyang Wei, Seungjin Lee, Hitarth Choubisa, Laxmi Kishore Sagar, Bin Sun, Se-Woong Baek, Bin Chen, Petar Todorovic, Amin Morteza Najarian, Armin Sedighian Rasouli, Dae-Hyun Nam, Maral Vafaie, Yuguang C. Li, Koen Bertens, Sjoerd Hoogland, Oleksandr Voznyy, F. Pelayo Garcia de Arquer, Edward H. Sargent
Summary: This study introduces a new method to improve facet alignment in CQD solids by adjusting the surface of CQDs, leading to enhanced coupling and improved performance of optoelectronic devices. This approach results in a 10x increase in hole mobility compared to control CQD solids, and enables photodiodes with 70% external quantum efficiency and rapid response times.
ADVANCED MATERIALS
(2021)
Article
Chemistry, Physical
Shuo Zhang, Gediminas Gervinskas, Yang Liu, Ross K. W. Marceau, Jing Fu
Summary: This study explores the application of nanoscale in-situ cryo-condensation coating technique on needle-shaped specimens and frozen hydrated cells. By controlling parameters, the properties of the deposited layer can be tuned, revealing surface morphologies and investigating the physical mechanisms of curing. This approach opens a novel route to nanofabrication on tip geometry and site-specific conductive protection.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Andrew C. Madison, John S. Villarrubia, Kuo-Tang Liao, Craig R. Copeland, Joshua Schumacher, Kerry Siebein, B. Robert Ilic, J. Alexander Liddle, Samuel M. Stavis
Summary: This article focuses on the study of the fundamental tradespace of resolution and throughput in focused-ion-beam machining. By using chromia and silica as materials, complex test structures were fabricated and characterized to explore the response of the bilayer to a focused beam of gallium cations. The results showed a super-resolution factor of up to 6+/-2 and improvements to volume throughput of at least factors of 42+/-2.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Jiakai Liu, Kepeng Song, Xiaopeng Zheng, Jun Yin, Ke Xin Yao, Cailing Chen, Haoze Yang, Mohamed Nejib Hedhili, Wang Zhang, Peigang Han, Omar F. Mohammed, Yu Han, Osman M. Bakr
Summary: This study reports the fabrication of CsPbBr3 nanoplates with high beam stability using a regrowth strategy assisted by cyanamide. The ultrahigh stability of the nanoplates is attributed to defect-healing self-assembly/regrowth processes and surface modulation by strong electron-withdrawing cyanamide molecules. The atomic-resolution EDS elemental mapping of the as-prepared CsPbBr3 nanoplates revealed unprecedented details of LHP nanostructures, highlighting the importance of improving beam stability for fundamental research on LHPs.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Review
Chemistry, Multidisciplinary
Pablo Orus, Fabian Sigloch, Soraya Sangiao, Jose Maria De Teresa
Summary: Superconductivity has been a fascinating and important field of study in physics and materials science since its discovery in 1911. Nanofabrication techniques using focused ion/electron beam induced deposition can downsize superconducting materials to the nanoscale, allowing for targeted and highly-flexible nanopatterning. Tungsten, niobium, molybdenum, carbon, and lead have been identified as the most notable superconducting materials used in functional devices.
Article
Multidisciplinary Sciences
Xudong Pei, Liqi Zhou, Chen Huang, Mark Boyce, Judy S. S. Kim, Emanuela Liberti, Yiming Hu, Takeo Sasaki, Peter D. D. Nellist, Peijun Zhang, David I. I. Stuart, Angus I. I. Kirkland, Peng Wang
Summary: Cryogenic electron ptychography (Cryo-EPty) is a novel method for imaging biomacromolecular structures. In this study, the authors develop a single particle analysis technique based on Cryo-EPty phase, which allows for high contrast and wide spatial frequency-band 3D imaging. This method shows potential for challenging single particle analyses, including small macromolecules and heterogeneous or flexible particles. It may also enable structure determination within cells without the need for protein purification and expression.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Yuanmin Zhu, Qing Zhang, Xuming Yang, Menghao Li, Biao Wang, Meng Gu
Summary: The study utilized ultra-low-dose cryo-TEM to characterize the atomic-scale structure of organic-inorganic hybrid perovskite nanoplatelets, revealing the growth pattern and crystal structure evolution. Insights gained from atomic-scale investigations may have significant impacts on the development of battery materials and solar energy technologies.
Article
Multidisciplinary Sciences
Weili Li, Benwen Chen, Xinyu Hu, Hangbing Guo, Sheng Wang, Jingbo Wu, Kebin Fan, Caihong Zhang, Huabing Wang, Biaobing Jin, Jian Chen, Peiheng Wu
Summary: Electrically controlled terahertz beamforming antennas are crucial for wireless communications, security checks, and radar, improving coverage and information capacity. Programmable metasurfaces offer a flexible and cost-effective platform for terahertz beam steering, but scaling the arrays to achieve high-gain beam steering poses technical challenges. Researchers propose a pixelated liquid crystal terahertz metasurface with a crossbar structure, enabling array scale-up to over 3000. The programmable liquid crystal metasurface demonstrates active beam deflection in the upper half-space, opening possibilities in pencil beamforming, high-speed information processing, and optical computing.
Article
Optics
R. Lisiecki, J. Komar, B. Macalik, P. Solarz, M. Berkowski, W. Ryba-Romanowski
Summary: In this study, optical absorption and luminescence spectra of Yb3+ ions in different host crystals were investigated as a function of temperature. The analysis of obtained data provided detailed information on the temperature dependence of Yb3+ transitions and their effects on the spectral characteristics. Combined with the structural peculiarities of the crystals, generalizations regarding the importance of structural disorder in Yb3+-doped laser crystals operating at cryogenic temperatures were proposed.
JOURNAL OF LUMINESCENCE
(2022)
Article
Chemistry, Physical
Witold Ryba-Romanowski, Radoslaw Lisiecki, Jaroslaw Komar, Boguslaw Macalik, Marek Berkowski
Summary: Crystals of Gd3Al2.5Ga2.5O12:Er3+, (Lu0.3Gd0.7)(2)SiO5:Er3+, and LiNbO3:Er3+ with different origins and inherent structural disorder were grown. Optical absorption and luminescence spectra of Er3+ transitions were measured for the crystal samples at temperatures ranging from 80 to 300 K. The effects of temperature on the intensities, wavelengths, and bandwidths of Er3+ transitions were thoroughly analyzed. The knowledge of the structural dissimilarities of the host crystals, combined with the acquired information, allowed for the interpretation of the impact of structural disorder on the spectroscopic properties of Er3+-doped crystals and the determination of their lasing ability at cryogenic temperatures.
Article
Chemistry, Multidisciplinary
Huixin Guo, Axel J. M. Deenen, Mingran Xu, Mohammad Hamdi, Dirk Grundler
Summary: High-density integration in information technology has spurred research on functional 3D nanodevices. In this study, an additive manufacturing methodology was employed to fabricate unprecedented 3D ferromagnetic nanonetworks with a woodpile-structure unit cell. The collective spin dynamics at frequencies up to 25 GHz were investigated, revealing a significant discrepancy of about 10 GHz between bulk and surface modes due to different unit cell sizes in the Ni-based nanonetworks. The angle- and spatially-dependent modes demonstrate opportunities for multi-frequency signal processing in 3D circuits via magnons.
ADVANCED MATERIALS
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Linxi Shi, N. Robert Bennett, Eric Nguyen, Carolyn MacDonald, Adam Wang, Wu Liu
Summary: This study demonstrated that the focused kV x-ray technique can substantially improve the imaging resolution for small animal imaging.
Article
Materials Science, Multidisciplinary
A. S. Trifonov, A. Lubenchenko, D. Louzguine-Luzgin
Summary: This study investigated the effect of cryogenic cycling treatment on the elastic properties of a Fe48Cr15Mo14C15B6Y2 bulk metallic glass containing a nanometer scale native oxide film. The alloy showed surface elastic stiffening on thermal cycling in liquid nitrogen which relaxed in 2 days. These results were compared with previous studies on bulk metallic glasses.
Article
Chemistry, Multidisciplinary
Fang Yuan, Yanyu Jia, Guangming Cheng, Ratnadwip Singha, Shiming Lei, Nan Yao, Sanfeng Wu, Leslie M. Schoop
Summary: We develop a robust method for atomic-resolution visualization of monolayers and twisted-bilayer WTe2 (tWTe(2)), confirming their high crystalline quality and structural stability. Our findings provide important experimental information for modeling the physical properties of 2D WTe2 systems.
Article
Chemistry, Applied
Ruixue Yangcheng, Yuntong Cui, Shuang Luo, Jiansu Ran, Jianjian Wang
Summary: Developing an efficient and stable catalyst for aqueous hydrodeoxygenation (HDO) of lignin derivatives at ambient temperature is highly desired. In this study, a novel Pd/PHS catalyst with a hierarchical structure was successfully prepared and demonstrated excellent catalytic activity for the conversion of vanillin to 2-methoxy-4-methyl phenol in water solvent. The hierarchical zeolitic structure of Pd/PHS immobilizes acidic P species, promoting the conversion of reaction intermediates and enhancing the yield of desired product. This work provides a new route for designing stable catalysts for the efficient HDO of lignin derivatives to high value-added chemicals and biofuels at ambient temperature.
MICROPOROUS AND MESOPOROUS MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Chenxi Sui, Jiankun Pu, Ting-Hsuan Chen, Jiawei Liang, Yi-Ting Lai, Yunfei Rao, Ronghui Wu, Yu Han, Keyu Wang, Xiuqiang Li, Venkatasubramanian Viswanathan, Po-Chun Hsu
Summary: Electrochromism allows for the control of light transmittance to increase building energy efficiency. It can reduce the energy consumption for HVAC systems in buildings and contribute to climate change mitigation. Aqueous flexible electrochromic design with tunable emissivity based on graphene and reversible copper electrodeposition has been developed, showing excellent long-term durability.
NATURE SUSTAINABILITY
(2023)
Article
Chemistry, Multidisciplinary
Wenyi Shao, Qiang Li, Tengyue He, Yue Zhang, Mengchen Niu, Hongyun Wang, Zhenzhong Zhang, Yang Zhou, Jian-Xin Wang, Ruirui Fan, Xiaochuan Xia, Osman M. Bakr, Omar F. Mohammed, Hongwei Liang
Summary: In this study, a hybrid organic-inorganic perovskite (C4H9NH3)(2)PbBr4 (BPB) is used as a scintillator to detect both fast neutrons and X-rays. The organic component converts fast neutrons into detectable recoil protons, while the inorganic component efficiently absorbs the energy of the charged recoil protons and provides a large X-ray cross-section. The BPB scintillator exhibits high light yields and fast response times, and is capable of energy-selective imaging for both fast neutrons and X-rays with high resolutions.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yaozu Liu, Jingwei Li, Jia Lv, Zitao Wang, Jinquan Suo, Junxia Ren, Jianchuan Liu, Dong Liu, Yujie Wang, Valentin Valtchev, Shilun Qiu, Daliang Zhang, Qianrong Fang
Summary: Although isomerism is rare in covalent organic framework (COF) materials, this study achieved controllable synthesis of topological isomers in three-dimensional COFs for the first time. Different solvents were used to obtain two isomers, JUC-620 and JUC-621, with distinct porous features. JUC-621 with a qtz net showed larger mesopores and higher surface area compared to JUC-620 with a dia net, and it exhibited efficient dye removal and excellent iodine adsorption.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Mingxiu Duan, Tie Shu, Jingwei Li, Daliang Zhang, Li-Yong Gan, Ke Xin Yao, Qiang Yuan
Summary: Efficient and durable electrocatalysts with highly dispersed Ru clusters anchored on Na+, K+-decorated porous carbon have been successfully prepared through hydrothermal and annealing treatment. The resulting Ru/Na+, K+-PC exhibits ultralow overpotential, high mass activity, and long-term durability, surpassing commercial Pt/C benchmark. Density functional theory calculations suggest that the presence of Na and K ions efficiently decreases the energy barrier for H-OH bond breaking, favoring the Volmer step.
Article
Multidisciplinary Sciences
Liang Huang, Ge Gao, Chaobo Yang, Xiao-Yan Li, Rui Kai Miao, Yanrong Xue, Ke Xie, Pengfei Ou, Cafer T. T. Yavuz, Yu Han, Gaetano Magnotti, David Sinton, Edward H. H. Sargent, Xu Lu
Summary: Electrochemical CO2 reduction (CO2R) is a method to close the carbon cycle for chemical synthesis. The research has mainly focused on ambient pressure CO2, but industrial CO2 is usually pressurized and in dissolved form. By studying the effects of pressure on CO2R, the researchers found that higher pressure leads to increased formate selectivity. They further enhanced this pressure-mediated effect by functionalizing the surface of a Cu cathode with a proton-resistant layer. This work highlights the potential of using industrial CO2 as a feedstock for sustainable chemical synthesis.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Jiaxing Zhang, Ajuan Zhou, Kaivalya Gawande, Guanxing Li, Shujie Shang, Chengyi Dai, Wei Fan, Yu Han, Chunshan Song, Limin Ren, Anfeng Zhang, Xinwen Guo
Article
Chemistry, Physical
Tengyue He, Yang Zhou, Peng Yuan, Jun Yin, Luis Gutierrez-Arzaluz, Shulin Chen, Jian-Xin Wang, Simil Thomas, Husam N. Alshareef, Osman M. Bakr, Omar F. Mohammed
Summary: Copper-based halide scintillators have attracted interest due to their advantageous properties. In this study, Cu(I) iodide inks containing Cu4I6(L-1)(2) nanoparticles and Cu4I6(L-2)(2) nanorods were synthesized for X-ray imaging. The resulting scintillators demonstrated high photoluminescence quantum yields and low detection limits, making them suitable for medical radiography and nondestructive detection.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Jiaqiang Li, Haicheng Cao, Qingxiao Wang, Hui Zhang, Qing Liu, Cailing Chen, Zhan Shi, Guanxing Li, Ya Kong, Yichen Cai, Jie Shen, Ying Wu, Zhiping Lai, Yu Han, Jin Zhang
Summary: This study reports a method to synthesize monolayer graphdiyne within the interlayer space of MXene and demonstrates its excellent electronic properties. The new strategy of preparing 2D materials provides a pathway for fabricating materials with precisely controlled layer numbers and long-range structural order.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Qianfeng Gu, Jiajia Zha, Cailing Chen, Xin Wang, Wenyan Yao, Jiahe Liu, Fangyuan Kang, Jinglun Yang, Yang Yang Li, Dangyuan Lei, Zhiyong Tang, Yu Han, Chaoliang Tan, Qichun Zhang
Summary: The use of chiral covalent organic frameworks (COFs) as active elements in photodetectors to directly identify circularly polarized light (CPL) can meet the requirement of integration and miniaturization of the as-fabricated devices. In this study, two isoreticular chiral 2D COFs (CityU-7 and CityU-8) were designed and synthesized to enhance optical absorption and engender chirality for direct CPL detection. Both COFs exhibited distinguishable photoresponse towards left-handed and right-handed circularly polarized light at 405 nm.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Chunwei Dong, Ren-Wu Huang, Arunachalam Sagadevan, Peng Yuan, Luis Gutierrez-Arzaluz, Atanu Ghosh, Saidkhodzha Nematulloev, Badriah Alamer, Omar F. Mohammed, Irshad Hussain, Magnus Rueping, Osman M. Bakr
Summary: In this study, a synthesis method for obtaining an atomically precise nanoparticle with a surface-defective analogue is reported. The loss of a single surface atom drastically alters the reactivity of the nanoparticle, showing promising activity for click chemistry, especially photoinduced azide-alkyne cycloaddition. This study not only uncovers the effect of single-surface atom modification on nanoparticle properties but also demonstrates the potential of single-atom surface modification as a means for designing nanoparticle catalysts.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Engineering, Environmental
Xiaoling Liu, Yitong Liu, Yue Wu, Shan Dong, Guoqin Qi, Cailing Chen, Shibo Xi, Pan Luo, Yihu Dai, Yu Han, Yu Zhou, Yu Guo, Jun Wang
Summary: This study successfully encapsulated highly dispersed Pt nanoparticles within BEA zeolite, adjacent to surface hydroxyl groups, to achieve synergistic HCHO oxidation at 25 degrees C. High efficiency and long-term stability were obtained under large space velocity, with rapid elimination rate and large turnover frequency. This is the first example of synergy derived from hydroxyl groups and confined noble metals within zeolites, accelerating the rate-determining step in the HCHO elimination.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Chemical
Ainur Yerzhankyzy, Yingge Wang, Feng Xu, Xiaofan Hu, Bader Ghanem, Xiaohua Ma, Marcel Balcik, Nimer Wehbe, Yu Han, Ingo Pinnau
Summary: The physical, chemical, and gas permeation properties of a heat-treated hydroxyl-functionalized Troger's base-derived intrinsically microporous polyimide, 6FDA-HTB, were studied. The results showed that polybenzoxazole (PBO) membranes obtained from thermal rearrangement had increased gas permeability but decreased selectivity. The polymer-carbon transition membranes exhibited improved gas permeability and selectivity, while the early-stage carbon membranes had further enhanced selectivity due to structural tightening.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Physical
Muhammad Naufal Lintangpradipto, Hongwei Zhu, Bingyao Shao, Wasim J. Mir, Luis Gutierrez-Arzaluz, Bekir Turedi, Mutalifu Abulikemu, Omar F. Mohammed, Osman M. Bakr
Summary: Grain-free single-crystal perovskites can improve the stability of perovskite solar cells. MA-free SC-PSCs have achieved new stability and efficiency benchmarks, making them promising candidates for commercialization.
ACS ENERGY LETTERS
(2023)
Review
Chemistry, Multidisciplinary
Yikuan Liu, Xiaona Liu, An Su, Chengtao Gong, Shenwei Chen, Liwei Xia, Chengwei Zhang, Xiaohuan Tao, Yue Li, Yonghe Li, Tulai Sun, Mengru Bu, Wei Shao, Jia Zhao, Xiaonian Li, Yongwu Peng, Peng Guo, Yu Han, Yihan Zhu
Summary: Covalent organic frameworks are crystalline porous materials with designable structures and functions, which can acquire multifunctionalities and have versatile applications in gas separation/storage, catalysis, and optoelectronic devices.
CHEMICAL SOCIETY REVIEWS
(2024)