Article
Chemistry, Physical
Yichun Du, Scott A. Bradford, Chongyang Shen, Tiantian Li, Xiaoyuan Bi, Dong Liu, Yuanfang Huang
Summary: This study developed novel analytical expressions and numerical approaches for calculating the interaction energy/force between particles and an air-water interface. The mechanisms of interaction before and after penetration were analyzed, explaining the repulsive forces that inhibit particle approaching and the significant repulsion observed after penetration. The findings of this study are critical for understanding and quantifying engineered processes involving particle manipulation.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Chemical
Ji Zhang, Yingmin Zhu, Tarek Ragab, Weidong Wang, Haiyan Zhang, Xiao Wang, Kyle Jiang
Summary: Roughness and microstructures at the micro and nano scales affect the van der Waals forces between particles and surfaces. Previous theoretical models may inaccurately estimate the van der Waals force, especially when the particle is much larger than the surface asperities. In this paper, a numerical model is proposed to accurately calculate the van der Waals force between a spherical particle and a rough surface with periodic nanostructures. The model considers the planar distribution of asperities, providing more precise estimations of the van der Waals force.
Article
Chemistry, Multidisciplinary
Yurina Aoyama, Naoko Sato, Akiko Toyotama, Tohru Okuzono, Junpei Yamanaka
Summary: This study demonstrates that submicron-sized colloidal particles can be adsorbed onto hydrogels solely by van der Waals (vdW) attraction, without any special interaction. The adsorption of different particles on polyacrylamide (PAAm) and polydimethylacrylamide (PDMA) hydrogels were investigated, with the vdW force being tuned by the refractive index of the media. The results indicate that the vdW force is a sufficiently strong driving force for the particle adsorption to polymer hydrogel surfaces in water.
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2022)
Article
Engineering, Chemical
Tengfang Zhang, Dan Chen, Yun Zhang, Yunming Wang, Huamin Zhou
Summary: In this study, a discrete element model for sub-micron particles is established and it is found that sub-micron particles exhibit cluster and chain structures with large porosity and coordination number, which is different from the relationship between porosity and coordination number of micron particles.
Article
Chemistry, Multidisciplinary
Lijuan Niu, Yuyin Li, Mei Zhao, Zhenjing Liu, Mengjia Zhang, Changchun Ding, Zhenjun Dou, Yihong She, Kenan Zhang, Zhengtang Luo, Lijie Zhang, Shun Wang
Summary: This study reports a van der Waals template-assisted growth method for 2D crystals, which reduces the growth temperature by up to 35% compared to traditional vapor deposition. The low-temperature growth process is attributed to the low surface diffusion barrier of precursors on van der Waals surfaces. Additionally, the grown 2D crystals can be easily peeled off and transferred to other substrates for applications.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Xiangdong Guo, Wei Lyu, Tinghan Chen, Yang Luo, Chenchen Wu, Bei Yang, Zhipei Sun, F. Javier Garcia de Abajo, Xiaoxia Yang, Qing Dai
Summary: 2D monolayers can be vertically stacked in van der Waals heterostructures to support a wide range of confined polaritons. This offers advantages in terms of controlling the constituent layers, stacking sequence, and twist angles. These heterostructures have extended the performance and functions of polaritons, and potential applications include nanophotonic integrated circuits.
ADVANCED MATERIALS
(2023)
Article
Engineering, Chemical
Kailin Chen, Jingwei Wu, A. L. Yarin
Summary: Nonwoven fibrous filter membranes are widely used in filtration due to their low cost. However, they are not effective in intercepting particles as small as the SARS-CoV-2 (COVID-19) virus. This study proposes a novel approach to enhance the performance of filtration membranes by reducing fiber size and coating fibers with metal. Experimental results show that this method improves filtration efficiency by incorporating van der Waals forces and electric Coulomb forces. The membrane combining both forces is almost four times more effective than a comparable membrane without the electric force.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Physical
Jing Wang, Yajuan Sun, Mingying Yu, Xihua Lu, Sridhar Komarneni, Cheng Yang
Summary: Highly hydrophilic nanoparticles can stabilize emulsions through van der Waals attraction. Emulsions exhibit highest stability near the isoelectric points of TiO2 nanoparticles. This work presents a simple, general, and green method for preparing particle-stabilized emulsions.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Xiaohui Song, Zhen Liu, Zinan Ma, Yanjie Hu, Xiaojing Lv, Xueping Li, Yong Yan, Yurong Jiang, Congxin Xia
Summary: We developed a simple and effective metal transfer technique to fabricate p-type and n-type WSe2 transistors and subsequently constructed vertical WSe2 transistors and vertical WSe2 photodiodes. The devices exhibited excellent performance, including high responsivity, fast response speed, and large light on/off ratio, demonstrating the potential of metal transfer technique for constructing high-performance vertical optoelectronic devices.
Article
Optics
Lucas Queiroz, Edson C. M. Nogueira, Danilo T. Alves
Summary: This study investigates the interaction between a neutral anisotropic polarizable particle and a corrugated surface in the presence of two non-dispersive semi-infinite dielectrics. It was found that when the dielectric constants of the two materials are different, the behaviors of peak, valley, and intermediate regimes exhibit significant changes. These findings provide important insights for understanding the interaction between anisotropic particles and corrugated surfaces.
Article
Engineering, Electrical & Electronic
Rashmi Kumari, Shubhanshi Sharma, Shailendra Kumar Varshney, Basudev Lahiri
Summary: In this paper, a van der Waals heterostructure-based optical metasurface was theoretically investigated for dual-band optical biosensing. The proposed structure consists of two gratings, allowing refractive index sensing in the visible and vibrational fingerprint detection in the mid-infrared region simultaneously. The sensor has the potential to be used in next-generation medical applications and environmental monitoring.
IEEE SENSORS JOURNAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Fa-Yuan Ge, Qi Yan, Shuai Liang, Xin-De Duan, He-Gen Zheng
Summary: By weakening intermolecular forces between adjacent layers, facile exfoliation of a two-dimensional metal-organic nanosheet was achieved. The resulting material showed enhanced oxygen evolution reaction performance.
INORGANIC CHEMISTRY
(2022)
Article
Multidisciplinary Sciences
A. J. Sternbach, S. H. Chae, S. Latini, A. A. Rikhter, Y. Shao, B. Li, D. Rhodes, B. Kim, P. J. Schuck, X. Xu, X-Y Zhu, R. D. Averitt, J. Hone, M. M. Fogler, A. Rubio, D. N. Basov
Summary: Layered crystals, such as tungsten diselenide, can exhibit unconventional optical properties that allow for the propagation of subdiffractional waveguide modes with hyperbolic dispersion. This study demonstrates optically induced hyperbolicity in WSe2 and explores the role of quantum transitions of excitons in the observed polaritonic response.
Article
Physics, Multidisciplinary
Adel M. Morad, Ehab S. Selima, Ahmed K. Abu-Nab
Summary: This paper investigates fluidized granular materials with the van der Waals normal form under the effects of friction and viscosity. Analytical solutions for the nonlinear PDEs governing the granular model are explored using hydrodynamic equations, with a focus on phase separation phenomenon. The stability analysis and qualitative agreements with previous works are demonstrated through two- and three-dimensional graphics.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Review
Chemistry, Multidisciplinary
Hui-Lei Hou, Cosimo Anichini, Paolo Samori, Alejandro Criado, Maurizio Prato
Summary: In the past 15 years, 2D materials have revolutionized materials science and become powerful components for high-performance chemical sensors. By forming van der Waals heterostructures (VDWHs), the individual drawbacks of 2D materials can be overcome, leading to superior sensitivities, selectivity, and stability. This review discusses the latest developments in chemical sensors based on VDWHs of 2D materials, including sensing mechanisms and future directions with potential impact in environmental sciences and biomedical applications.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Engineering, Chemical
Guodong Liu, Peng Wang, Fan Yu, Yanan Zhang, Wentao Guo, Huilin Lu
ADVANCED POWDER TECHNOLOGY
(2015)
Article
Energy & Fuels
Wang Shuai, Chen Juhui, Lu Huilin, Liu Guodong, Sun Liyan
Article
Energy & Fuels
Wang Shuai, Zhang Tianyu, Liu Guodong, Lu Huilin, Sun Liyan
Article
Thermodynamics
Ahmed Bougamra, Huilin Lu
JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS
(2016)
Article
Engineering, Chemical
Shuai Wang, Qi Wang, Juhui Chen, Guodong Liu, Huilin Lu, Liyan Sun
ADVANCED POWDER TECHNOLOGY
(2016)
Article
Engineering, Multidisciplinary
Dan Li, Lin Wang, Qiang Wang, Guodong Liu, Huilin Lu, Qinghong Zhang, Muhammad Hassan
APPLIED MATHEMATICAL MODELLING
(2016)
Article
Thermodynamics
Weiguo Xu, Shuyan Wang, Qinghong Zhang, Qiang Wang, Huilin Lu, Heping Tan
APPLIED THERMAL ENGINEERING
(2016)
Article
Thermodynamics
Xu Weiguo, Ren Depeng, Ye Qing, Liu Guodong, Lu Huilin, Wang Shuai
APPLIED THERMAL ENGINEERING
(2016)
Article
Engineering, Chemical
Liyan Sun, Wenhao Yu, Muhammad Hassan, Shuai Wang, Guodong Liu, Huilin Lu
CHEMICAL ENGINEERING & TECHNOLOGY
(2016)
Article
Thermodynamics
Xu Weiguo, Wang Shuyan, Lu Huang, Wang Qiang, Zhang Qinghong, Lu Huilin
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2016)
Article
Energy & Fuels
Shuai Wang, Qi Wang, Juhui Chen, Guodong Liu, Huilin Lu, Liyan Sun
Article
Engineering, Chemical
Guodong Liu, Peng Wang, Huilin Lu, Fan Yu, Yanan Zhang, Shuai Wang, Liyan Sun
Article
Engineering, Chemical
Shuai Wang, Juhui Chen, Qi Wang, Guodong Liu, Huilin Lu, Liyan Sun
Article
Engineering, Chemical
Dan Li, Guodong Liu, Huilin Lu, Qinghong Zhang, Qi Wang, Hongbing Yu
Article
Green & Sustainable Science & Technology
Weiguo Xu, Shuyan Wang, Lu Huang, Qiang Wang, Qinghong Zhang, Huilin Lu
Article
Engineering, Chemical
Ri Zhang, Shasha Zhang, Mengyan Ding
Summary: A thin liquid film method is proposed to evaluate sand erosion in annular flow. This method considers the direct interaction between the liquid film and gas core, as well as the entrainment and deposition of droplets. The erosion rate is calculated by considering the effects of liquid entrainment and particle velocity decay. The method is fully verified by comparing with experimental data.
Article
Engineering, Chemical
Yu Suo, Xianheng Su, Wenyuan He, Xiaofei Fu, Zhejun Pan
Summary: This research investigates the mechanical properties of sandstone-shale composite through orthogonal experimental method and discrete element simulation. The results show that different lithologies and thickness ratios can affect the strength and fracture mode of the composite rock samples.
Article
Engineering, Chemical
Maurizio Troiano, Andrea El Hassanin, Roberto Solimene, Alessia Teresa Silvestri, Fabrizio Scala, Antonino Squillace, Piero Salatino
Summary: This study investigates the potential of Fluidized Bed Finishing (FBF) for square flat AlSi10Mg specimens manufactured via Laser-Powder Bed Fusion (L-PBF) additive manufacturing technology. The results show that good finishing can be achieved using rotation-assisted tests, with a maximum reduction of surface roughness by 67%. Steel particles are found to be the most effective bed material.
Review
Engineering, Chemical
Ningbo Song, Wanzhong Yin, Jin Yao
Summary: Seawater's dissolved salts and minerals have various effects on the flotation process, including influencing the characteristics and behavior of flotation factors, as well as affecting the surface of sulfide minerals. In most cases, seawater has adverse effects on the flotation of sulfide minerals, but these effects can be mitigated by adjusting the reagents.
Article
Engineering, Chemical
Kaiqiao Wu, Shuxian Jiang, Victor Francia, Marc-Olivier Coppens
Summary: In rectangular and cylindrical annular fluidized beds, pulsating gas flow can create regular bubble patterns, overcoming challenges seen in conventional units. This study provides new opportunities for modularization of fluidized bed operations.
Article
Engineering, Chemical
Shuo Li, Huili Zhang, Jan Baeyens, Miao Yang, Zehao Li, Yimin Deng
Summary: The paper assesses the behavior of cohesive Geldart C-type particles when fluidized by air with the aid of vibration. It determines that mechanical vibration is a simple and effective method to improve the fluidity of cohesive particles during fluidization.
Article
Engineering, Chemical
Zhenfei Feng, Qingyuan Zhang, Shanpan Liang, Zhenzhou Li, Fangwen Guo, Jinxin Zhang, Ding Yuan
Summary: A new micro/mini-channel heat sink (MCHS) with a combined structure of longitudinal and transverse vortex generators is designed, using Al2O3 nanofluid as the working medium. The study explores the effects of transverse vortex generator shape and longitudinal vortex generator angle on the hydraulic and thermal characteristics, comprehensive performance, entropy generation, and exergy efficiency. The results show that the triangular transverse vortex generator improves the comprehensive performance and exergy efficiency. Combined with the longitudinal vortex generator, the MCHS achieves the best comprehensive performance, entropy generation, and exergy efficiency when the Reynolds number is 742.
Article
Engineering, Chemical
Kostas Giannis, Christoph Thon, Guoqing Yang, Arno Kwade, Carsten Schilde
Summary: This study presents a 3D convolutional neural network (3D-CNN) methodology for generating realistic 3D models of particles. The method trains on 2D projections of particle images to predict their 3D shapes, and evaluates the accuracy of the predictions using Fourier shape descriptors (FSDs). This methodology has wide applications in particle shape analysis.
Article
Engineering, Chemical
Zheng-qing Zhou, Lu-jia Chai, Yu-long Zhang, Ya-bin Wang, Ze-chen Du, Tian-yi Wang, Yu-zhe Liu
Summary: The dynamic oxidation and shell-breaking processes of aluminum nanoparticles (ANPs) during heating were studied using in situ transmission electron microscopy. The results revealed that the changes in shell thickness can be divided into three stages, and the active aluminum content of ANP decreased before shell-breaking.
Article
Engineering, Chemical
Fulei Chen, Huaqing Ma, Zihan Liu, Lianyong Zhou, Yongzhi Zhao
Summary: A particle breakage model based on the particle replacement scheme, using the polyhedral model to describe particles, is proposed in this work to accurately describe the breakage of a large number of particles. Additionally, a fast-cutting algorithm is proposed to reproduce the size distribution of progeny particles determined by the breakage model. The validation and simulation results show satisfactory accuracy, efficiency, and stability of the algorithm.
Review
Engineering, Chemical
Matteo Errigo, Christopher Windows-Yule, Massimiliano Materazzi, Dominik Werner, Paola Lettieri
Summary: Gas-solid fluidized-bed systems have advantages in terms of chemical reaction efficiency and temperature control, making them widely used in industrial applications. However, the design, scale-up, and optimization of these complex units are limited by the lack of deep physical understanding. Non-invasive and non-intrusive diagnostic techniques provide a way for researchers to study these systems without affecting the flow field or directly contacting the medium under study.
Article
Engineering, Chemical
Saeed Fateh, Mohammad Behshad Shafii, Mohammad Najafi, Cyrus Aghanajafi
Summary: Applying a magnetic field to ferrofluids alters their flow characteristics and enhances heat transfer. Through visualization and quantitative investigation, it is found that the magnetic field influences the flow patterns and velocity profiles, improving fluid mixing and vorticity magnitude.
Article
Engineering, Chemical
Lei Gao, Bingbing Wei, Xiaochuan Hu, Zaifeng Yao, Yiwen Fang, Xuejian Gao
Summary: In this study, a numerical model of sand triaxial test was established using discrete element software PFC3D, and an indoor triaxial test was conducted to calibrate the numerical model. The influence of microscopic parameters on the macroscopic mechanical response of sand was analyzed. The results showed that the friction coefficient had the greatest impact on the peak strength and residual strength of the sand's stress-strain curve, and it was positively correlated. The normal tangential stiffness ratio was negatively correlated, while the porosity and boundary flexibility stiffness had minimal influence on it.
Article
Engineering, Chemical
Xuan Liu, Jie Gong, Kai Jiang, Xiaojuan Lai, Yu Tian, Kang Zhang
Summary: This study aimed to improve the performance of lignite coal water slurries (CWSs) by synthesizing a series of three-arm amphiphilic block copolymers. By controlling the relative molecular weight, hydrophilic/hydrophobic ratio, and ionic group content, the apparent viscosity of CWSs was significantly reduced and the static stability was improved. Thermogravimetric testing and XPS analysis were conducted to reveal the mechanism behind the improved performance.
Article
Engineering, Chemical
Lanka Dinushke Weerasiri, Daniel Fabijanic, Subrat Das
Summary: Fluidization at low pressure offers significant benefits for the fine chemical industry. This study investigates the behavior of bubbles and bed expansion under low pressure conditions. It is found that lower pressure leads to larger bubbles, increased bubble quantity, and higher aspect ratio. The predictability is affected by the inhomogeneous fluidization, but low pressure fluidization can generate similar bubble sizes with lower fluidizing mass compared to atmospheric pressure.