Article
Nanoscience & Nanotechnology
Nannan Ren, Lina Hu, Bing Wang, Kaikai Song, Pengfei Guan
Summary: This study investigates the evolution of hidden structural topological features associated with the non-Arrhenius crossover in metallic glass-forming liquids through molecular dynamics simulations and topological order analysis. It reveals that the cooperative motions of atoms with k > 3 developing a stable topological network contribute to the non-Arrhenius behavior below the crossover temperature T-A, shedding light on the structural origin of relaxation dynamics in metallic glass-forming liquids.
SCRIPTA MATERIALIA
(2021)
Article
Thermodynamics
Sonja V. Smiljanic, Snezana R. Grujic, Srdan Matijasevic, Jovica Stojanovic, Jelena Nikolic, Veljko Savic, Daniela Z. Popovic
Summary: The crystal growth rate of La(2)SrB(10)O(19) in an undercooled melt of stoichiometric composition was studied, with experimental values showing higher growth rates compared to theoretical calculations.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Chemistry, Physical
Luojia Zhang, Evgeny Zhuravlev, Jun Yi, Qijie Zhai, Christoph Schick, Yulai Gao, Bingge Zhao
Summary: Crystal nucleation is a crucial step in the crystallization of metallic glasses. However, the nucleation kinetics can deviate from the classical nucleation theory as the undercooling increases. This study examines the nucleation kinetics in glass and undercooled melt using nanocalorimetry. By varying the cooling rate, the processes of crystallization, homogeneous nucleation, and heterogeneous nucleation are distinguished. The critical cooling rates for suppressing crystallization and nucleation are estimated, and a well-identified amorphous phase is produced for nucleation studies. The underlying kinetic mechanism is revealed through the analysis of crystallization heat and overall heat using the Johnson-Mehl-Avrami method.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Physics, Condensed Matter
Isabella Gallino, Prashant Wadhwa, Ralf Busch
Summary: This study demonstrates the impact of ordering transition and applied shear rate on the onset of crystallization during undercooling. Shearing initially triggers nucleation of the strong liquid from the fragile liquid, followed by crystallization proceeding from the strong liquid.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Materials Science, Ceramics
Wenfei Lu, Jo-Chi Tseng, Aihan Feng, Jun Shen
Summary: The study aimed to clarify the structural origin of the enhancement in glass-forming ability of binary NiNb metallic glasses. Ni62.5Nb37.5 alloy exhibited the best glass-forming ability and the densest atomic-packing structure among the four components, with a larger fraction of full icosahedral clusters. The glass structure in Ni62.5Nb37.5 MG was a heterogeneous mixture of interpenetrating icosahedral clusters, forming a chain-like network structure in the matrix. These Ni-centered icosahedra polyhedra played an essential role in controlling GFA.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Multidisciplinary Sciences
Sebastian A. Kube, Sungwoo Sohn, Rodrigo Ojeda-Mota, Theo Evers, William Polsky, Naijia Liu, Kevin Ryan, Sean Rinehart, Yong Sun, Jan Schroers
Summary: The authors propose a new method to measure the fragility of metallic glass forming liquids and find significant variations in fragility across Mg-Cu-Y alloys. Contrary to conventional understanding, low fragility does not necessarily correlate with high glass-forming ability. The introduction of crystallization complexity provides an additional contribution to modeling glass forming ability.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Yeong-Seong Kim, Woo-Chul Kim, Won-Tae Kim, Do-Hyang Kim
Summary: The addition of Sn has significantly improved the thermoplastic forming ability of Ti-Zr-Ni-Cu metallic glass, leading to changes in crystallization behavior and smaller grain size, indicating enhanced thermal stability.
METALS AND MATERIALS INTERNATIONAL
(2021)
Article
Chemistry, Physical
W. Porter Weeks, Katharine M. Flores
Summary: Researchers have used geometric alignment and density-based clustering algorithms to quantitatively describe the short-range atomic structure in the liquid state of five metallic glass-forming systems. They found that each liquid is composed of geometrically-similar atomic clusters, and the distribution of these clusters is inversely correlated to the glass-forming ability observed experimentally.
Article
Chemistry, Physical
Liliang Shao, Lin Xue, Qianqian Wang, Kaili Ma, Jindu Huang, Baolong Shen
Summary: In this study, the glass-forming ability of DyCoAl bulk metallic glass was improved by microalloying with Si element. The addition of Si affected the crystallization behavior of the BMG, changing the nucleation process and the growth rate of crystalline particles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
J. Q. Wu, H. P. Zhang, M. Z. Li
Summary: The relationship between structure and relaxation dynamics in metallic glass-forming liquids was studied through classical molecular dynamics simulations. It was found that the Debye-Waller factor decreases with increasing five-fold local symmetry and a new equation describing this relationship was derived. These findings suggest a common structural basis for both short-time beta-relaxation and long-time alpha-relaxation dynamics.
COMPUTATIONAL MATERIALS SCIENCE
(2022)
Review
Physics, Multidisciplinary
Vladimir N. Novikov, Alexei P. Sokolov
Summary: This review focuses on the mechanisms that control the steepness of the temperature dependence of structural relaxation in glass-forming liquids. It discusses the specific case of polymeric glass-forming liquids and the possible role of quantum effects in the glass transition.
Article
Materials Science, Ceramics
Liqiao Yue, Qijing Sun, Yihao Wang, Yin Wang, Rongjie Xue, Xia Li, Gongji Yang, Jiaojiao Yi
Summary: The glass-forming ability and thermal stability of (Zr72.6Al10Fe17.5)(100-x)Si-x alloys were studied with different Si additions, showing optimal values at x = 0.2 before decreasing. The effects of Si addition on the crystallization products and behavior of the alloys were found to be significantly different.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Ceramics
Y. X. Chen, S. P. Pan, X. Q. Lu, H. Kang, Y. H. Zhang, M. Zhang, S. D. Feng, K. L. Ngai, L. M. Wang
Summary: The study reveals the existence of unusual caged dynamics in metallic glass-forming liquids with strong atomic interactions. The mechanism of caged dynamics is found to be related to chemical order, Voronoi polyhedra, and covalent-like bonds.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
Hillary L. Smith, Claire N. Saunders, Camille Bernal-Choban, Stefan H. Lohaus, Colby J. Stoddard, Lucy K. Decker, J. Y. Y. Lin, Jennifer L. Niedziela, D. L. Abernathy, Jong-Hyun Na, Marios D. Demetriou, B. Fultz
Summary: The lattice vibrational dynamics in ultra-fragile Pt57Cu23P20 and Pt60Cu20P20 glasses were studied using in situ inelastic neutron scattering. The phonon density of states (DOS) curves for the undercooled liquids and the amorphous solids were found to be remarkably similar. The changes in vibrational entropy caused by the glass transition were less than 0.05 kB/atom. The excess vibrational entropy of the undercooled liquid in these highly fragile metal/metalloid glasses was about 0.5-1.5 J mol-1 K-1.
Article
Materials Science, Ceramics
Bing Wang, BaoShuang Shang, XuanQiao Gao, YiTao Sun, JiChao Qiao, WeiHua Wang, MingXiang Pan, PengFei Guan
Summary: The competition between crystallization and vitrification is crucial to the understanding of liquid-glass transition. Differences in atomic packing features in the transition region between crystalline grains and supercooled liquid contribute to distinct crystallization rates of bcc and fcc pure metals, revealing the important role of interface energy in determining crystal growth rate and glass forming ability.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
Jinglong Zhao, Wenfeng Shen, Dawu Lv, Jin Zhang, Yuheng Wang, Tongxiang Liang, Weijie Song
Summary: A highly selective and sensitive room temperature ammonia sensor was developed by in situ polymerizations of polyaniline with modulation of Hexadecyl trimethyl ammonium Bromide on a porous Polyvinylidene fluoride film. The sensor showed excellent response to NH3, with response values of 81.3% and 4.6% for 5 ppm NH3 and 0.01 ppm NH3 at 20 degrees C, respectively. It also exhibited superior selectivity for NH3 and stability, making it suitable for detecting chronic kidney disease.
Article
Engineering, Electrical & Electronic
Dawu Lv, Wenfeng Shen, Weigang Chen, Yuheng Wang, Ruiqin Tan, Meng Zhao, Weijie Song
Summary: Developing low-cost and high-performance ammonia sensors is significant for air pollution control and non-invasive diagnosis of human diseases. This study successfully developed a sensor by in situ polymerization of poly(aniline-co-pyrrole) on a flexible porous polyvinylidene fluoride-based sensitive membrane. The sensor exhibited excellent sensing performance with a response of 93% to 1 ppm NH3 at room temperature and a low detection concentration of 0.05 ppm. It also demonstrated long-term stability and outstanding flexibility. The study provides potential for commercial application in ammonia concentration detection related to human health.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Engineering, Electrical & Electronic
Dawu Lv, Wenfeng Shen, Weigang Chen, Yuheng Wang, Ruiqin Tan, Meng Zhao, Weijie Song
Summary: A citric acid-doped polyaniline/polyvinylidene fluoride (CPP) flexible ammonia sensor was prepared by in situ oxidative chemical polymerization on a flexible porous polyvinylidene fluoride membrane. The CPP sensor showed excellent performance with high response, low detection limit, and fast response and recovery times. It also demonstrated outstanding flexibility and stability. The results suggest that the CPP flexible film sensor is a high-performance candidate for enhanced ammonia gas sensing properties at room temperature.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Energy & Fuels
Huang Lin, Renjie Miao, Haiqiao Wang, Huahang Lai, Weiyan Wang, Weijie Song
Summary: This study focuses on improving the folding stability of foldable perovskite solar cells (PSCs) by sandwiching them with protective layers. The experimental results show that these sandwich-structured PSCs (SS-PSCs) exhibit high environment stability and excellent mechanical stability, making them a promising candidate for foldable optoelectronic devices.
Article
Chemistry, Physical
Huan Zhao, Zhipeng Yin, Pengcheng Gu, Yang Liu, WeiYan Wang, Huahang Lai, Hai-Qiao Wang, Ning Li, Weijie Song
Summary: The current state-of-the-art organic solar cells (OSCs) commonly use halogenated materials and solvents, which can be corrosive and harmful to the environment. Therefore, it is meaningful to explore and develop efficient and stable OSCs based on halogen-free materials and solvents. Researchers have successfully demonstrated that fully halogen-free OSCs can achieve efficient performance with an efficiency of 10.42% and superior thermal stability, due to the use of nonhalogenated active blend and processing solvent, which inhibit corrosion and preserve the initial efficiency for a prolonged period of time under high temperature conditions.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Qicun Lou, Ye Yang, Xueqi Wang, Qizhao Hu, Weijie Song
Summary: Tempering is essential for strengthening the manufacturing of safe glass. In order to improve the production of EC safety glass with varied size, it is important to ensure that the sputtered NiO film maintains its electrochromic performance after tempering. This study explores the feasibility of composition modification by W and Zn co-doping and finds that tempering offers the co-doped NiO film better electrochromic properties.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Jiaqi Yin, Dawu Lv, Jinglong Zhao, Wenfeng Shen, Pengfei Hu, Weijie Song
Summary: In this study, inkjet printing technology is used to deposit sensitive materials as a vertically assembled nest-like array composed of petal-shaped nanoparticles. It overcomes the drawbacks of traditional MEMS-based deposition technology for gas sensor sensitive materials in terms of cumbersome and unstable operation. The mesoporous ZnO sensor exhibits high gas-sensing response to low concentration acetone due to the uniform small nanoparticles, multi-dimensional assembly structures, and abundant oxygen vacancy defects.
Article
Chemistry, Analytical
Tiancheng Zhang, Ruiqin Tan, Wenfeng Shen, Dawu Lv, Jiaqi Yin, Weigang Chen, Haoyue Fu, Weijie Song
Summary: An electronic nose system was developed using a gas sensor array composed of MEMS sensors prepared by inkjet printing sensing materials on a micro-hotplate. The power consumption was decreased to 36 mW, and the optimal features were selected using the PSO algorithm. Support vector machine and artificial neural network models based on the optimal features were able to accurately recognize and quantify VOCs. The results demonstrate the promising potential of this approach.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Energy & Fuels
Qixiang Chen, Tianzhe Huang, Jie Cheng, Jiaping Zhang, Xuemei Huang, Hua Xu, Yuehui Lu, Weijie Song
Summary: In this study, a translucent-colored passive daytime radiative cooling (TC-PDRC) strategy was proposed by embedding plain Au or Au@SiO2 core-shell nanoparticles in a polymeric polyvinyl alcohol matrix. The TC-PDRC films showed higher visible transmittance, lower visible absorptance, and higher infrared thermal emittance compared to conventional TC films, resulting in a reduced thermal load. Field measurements demonstrated that the temperatures of the chamber covered by TC-PDRC films were significantly lower than those covered by conventional TC film during the midday period.
Article
Multidisciplinary Sciences
Zhen Wei Wu, Yixiao Chen, Wei-Hua Wang, Walter Kob, Limei Xu
Summary: The plastic deformation of crystalline materials can be explained by considering structural defects such as disclinations and dislocations. However, it is challenging to understand the mechanical properties and plastic events of glasses due to their liquid-like structure. In this study, the authors investigate the topological characteristics of a two-dimensional glass model and find that plastic events correlate with topological defects that have a negative charge. This provides a direct link between the structure of glasses and plastic behavior during deformation.
NATURE COMMUNICATIONS
(2023)
Review
Chemistry, Physical
Yuxin Ju, Ling Ai, Xiaopeng Qi, Jia Li, Weijie Song
Summary: This review comprehensively examines the scalable and highly reproducible nature of magnetron sputtering for depositing hydrophobic thin films. It outlines the fundamental mechanism of hydrophobicity and summarizes recent advances in the preparation, characteristics, and applications of thin films derived from oxides, polytetrafluoroethylene (PTFE), and diamond-like carbon (DLC). The review also discusses the future applications, current challenges, and development of hydrophobic thin films, providing a brief perspective on future research directions.
Article
Chemistry, Multidisciplinary
Zhi Han, Jia Li, Peng Xia, Jinhua Huang, Ruiqin Tan, Jinlong Zhang, Weijie Song
Summary: High performance and durable electrodes are essential for optoelectronic devices like ACEL applications. However, stability issues surrounding the silver (Ag) layer in ultrathin metal-based flexible electrodes have hindered their practical use. This study successfully prepares ultrathin and stable doped silver films by introducing a small amount of AlN during the sputtering process. These Ag-AlN films exhibit improved stability under high temperature and damp-heat conditions, and have been successfully used in flexible ACEL devices with excellent performance and mechanical flexibility.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Chemistry, Applied
Peiyu Wu, Shengxiong Zhang, Wenjun Zhang, Weijie Song
Summary: In this study, a new D-A structure polymer PPDOTTPD was synthesized by Stille coupling, and its electrochromic and electrofluorochromic properties were investigated for the first time. The results showed that PPDOTTPD exhibited outstanding electrochromic and electrofluorochromic performance. The dual-functional device based on PPDOTTPD showed high optical and fluorescence contrast. These findings provide possibilities for developing high-performance intelligent optical devices.
Review
Chemistry, Physical
Xi Fan, Nathan E. Stott, Jixi Zeng, Yunfei Li, Jianyong Ouyang, Liang Chu, Weijie Song
Summary: This review discusses the applications of PEDOT:PSS materials in photovoltaics, light-emitting diodes, thermoelectrics, photodetectors, and strain sensors. It introduces the basic principles and current research status of functionalized films and explores ways to enhance their optoelectrical and thermoelectrical properties, stretchability, stability, and wettability. The review also highlights the latest advances in the aforementioned devices and provides perspectives and suggestions for further development in optoelectronics and thermoelectrics.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Review
Chemistry, Multidisciplinary
Jinglong Zhao, Wenfeng Shen, Dawu Lv, Jiaqi Yin, Tongxiang Liang, Weijie Song
Summary: Changes in volatile organic compounds concentrations in human breath are closely related to certain diseases. The diagnosis of diseases by analyzing volatile organic compounds in human breath is a non-invasive, and easy-to-use tool that has gained increasing attention. Gas-sensitive sensors, with their easy integration, miniaturization, low cost, and simplicity, have broad prospects in the future diagnosis and early screening of large-scale population diseases.
PROGRESS IN CHEMISTRY
(2023)