Article
Engineering, Mechanical
Cheng Tang, Yafeng Zhang, Conghui Dong, Jiaxin Yu, Jianping Lai, Guiyuan Zhou
Summary: This study investigated the responses of fluid-solid interfacial friction force and adhesion force to voltage under electrowetting conditions. It was found that the friction force increased by two orders of magnitude in the electrowetting transition region, and the responses were almost instantaneous on the time scale. The findings suggest that the friction force and adhesion force can be manipulated in real-time over a wide range using voltage.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Perawat Boonpuek, Yuan Ma, Xinyi Li, Changhyun Choi, M. Cynthia Hipwell, Jonathan R. Felts
Summary: This study used atomic force microscopy to investigate the impact of humidity on adhesion and friction between nanoscale asperity and individual human finger corneocytes. The results revealed that the electrowetting effect at high humidity accounted for 35% of the adhesive force but less than 8% of the total friction.
Article
Chemistry, Multidisciplinary
Tobias Materzok, Annabelle Canestraight, Stanislav N. Gorb, Florian Muller-Plathe
Summary: In this study, a model of gecko keratin was developed to investigate the influence of electrostatic and van der Waals forces on gecko adhesion. The results showed that the pull-off force increased with increased water content and was inversely related to the water contact angle of the surface. The number and charge density of keratin and water at the surface were also found to play an important role in adhesion.
Review
Polymer Science
Hyunhang Park, Sung Hoon Lee
Summary: This paper reviews recent atomistic simulation works on interfacial interactions at the nanoscale level, with a focus on understanding the bonding, adhesion strength, and failure behavior between polymer films and silicate glass. Non-bonded and bonded interactions are analyzed, revealing the dominance of hydrogen bonding in adhesion and the importance of external conditions on adhesion and failure behavior.
Article
Chemistry, Multidisciplinary
Saima A. Sumaiya, Jun Liu, Mehmet Z. Baykara
Summary: The atomic-scale structure and properties of material surfaces play a significant role in various chemical and mechanical phenomena. However, current methods for characterizing surfaces at the atomic level are limited by the need for strict environmental conditions. This study presents a new approach utilizing conductive atomic force microscopy (C-AFM) to achieve atomic-resolution surface imaging under ambient conditions. The results demonstrate the capability of this method to manipulate and observe surface structure and electronics in real time, with wide-ranging applicability.
Article
Engineering, Mechanical
Kang-jie Rong, Ye-long Xiao, Ming-xue Shen, Huo-ping Zhao, Wen-Jian Wang, Guang-yao Xiong
Summary: The study found that ambient humidity has a significant impact on the adhesion behavior between the wheel and rail interface. Low humidity levels mainly lead to fatigue wear, while high humidity levels result in abrasive wear. Increasing humidity can help rollers avoid excessive wear.
Article
Materials Science, Multidisciplinary
Shunyu Chang, Yongda Yan, Bo Li, Yanquan Geng
Summary: Thermomechanical nanolithography was utilized to manipulate materials at the nanoscale on a polymethyl methacrylate thin film. By controlling scratching velocity and heated temperature, various nanostructures were achieved, including polymer nanowires, nanopit arrays, and nanogrooves. The study demonstrated the feasibility of using stick-slip friction to predict the generation of nanopit structures after calibrating the machining parameters to ensure accuracy.
MATERIALS & DESIGN
(2021)
Article
Multidisciplinary Sciences
Ali J. Mazaltarim, John J. Bowen, Jay M. Taylor, Stephen A. Morin
Summary: Materials and strategies for dynamic transport of microdroplets are relevant to various applications such as surface fluidics and analytical devices. Advanced techniques based on electrowetting, micropatterns, and gradients have been developed, but challenges remain in dynamic microdroplet transport. This study highlights the fabrication of mechano-tunable microtextured chemical gradients on elastomer films for controlled microdroplet transport. The interplay between driving forces and microtopography enables accurate prediction of conditions for successful transport.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Jiasheng Xu, Tingyi Hu, Qiang Zhao, Xin Chen, Yuhua Cao
Summary: This photonic crystal film combines magnetically responsive photonic crystals with photoinitiated polymerization of hydrogel films to show structural color changes in response to ambient humidity. It has the potential for naked-eye humidity detection and exhibits excellent stability and accuracy.
MATERIALS RESEARCH BULLETIN
(2022)
Article
Engineering, Manufacturing
Himangshu Pal, Rajat Mahapatra, Subham Datta, Somenath Chatterjee
Summary: A sensitive and cost-effective humidity sensor was fabricated using multilayer graphene synthesized through thermal exfoliation of cellulosic materials. The device showed better response time and stability compared to commercially available humidity sensors.
MATERIALS AND MANUFACTURING PROCESSES
(2022)
Review
Chemistry, Physical
Jingyi Li, Nick A. Shepelin, Peter C. Sherrell, Amanda Ellis
Summary: The triboelectric effect arises from charge transfer between surfaces under contact, with recent engineering focus on increasing porosity, surface roughness, and use of heterogeneous materials, particularly towards soft and flexible polymer devices. The progress in TE generators is critically evaluated, linking engineered performance to fundamental driving forces of triboelectricity using exemplar triboelectric polymer poly(dimethylsiloxane).
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Physical
K. M. Muhammed Salim, Sofia Masi, Andres Fabian Gualdron-Reyes, Rafael S. Sanchez, Eva M. Barea, Marie Krecmarova, Juan F. Sanchez-Royo, Ivan Mora-Sero
Summary: This study demonstrates that pure FAPI perovskite solar cells prepared in ambient air exhibit greater long-term stability compared to those fabricated under nitrogen. The addition of PbS quantum dots and methylammonium chloride can enhance the performance and stability of these devices even further.
ACS ENERGY LETTERS
(2021)
Article
Engineering, Environmental
Ravi Prakash, Sumana Ghosh
Summary: The present study focuses on the analysis of film formation in liquid-liquid two-phase flow in a mini capillary tube with different wettability. Experimental observations and analytical predictions show good agreement, indicating the effectiveness of the analyzed model.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Polymer Science
Anita Kwasniewska, Michal Swietlicki, Adam Proszynski, Grzegorz Gladyszewski
Summary: The study demonstrates that additives have a significant impact on the mechanical and surface properties of starch films, with increasing kaolin content resulting in higher modulus and adhesion force, as well as increased surface roughness parameters.
Article
Materials Science, Coatings & Films
Ruixue Wang, Zhangchuang Xia, Xianghao Kong, Lihong Liang, Kostya (Ken) Ostrikov
Summary: In this study, an atmospheric pressure plasma jet was used to deposit SiOx film on a metal surface, and plasma etching and annealing were applied to improve adhesion strength. The results showed that the adhesion strength of the film after plasma treatment was significantly higher than that of the untreated group, attributed to the increased oxygen content and composition changes in the film. Additionally, the lift-off voltage results in the gas-insulated line system also demonstrated an improvement after the annealing process.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Haotian Chen, Yingze Li, Yanjin Wang, Peng Ning, Yajing Shen, Xueyan Wei, Qishuai Feng, Yali Liu, Zhenguang Li, Chang Xu, Siyu Huang, Cuijun Deng, Ping Wang, Yu Cheng
Summary: This study presents a biohybrid microrobot that integrates magnetic, thermal, and hypoxia sensitivities for targeted cancer treatment. The microrobot demonstrates good thermal sensitivity and active targeting ability under a magnetic field, and efficiently triggers cancer cell apoptosis through magnetothermal ablation and NDH-2-induced ROS damage.
Article
Chemistry, Multidisciplinary
Siqi Sun, Jiaqi Miao, Rong Tan, Tieshan Zhang, Gen Li, Yajing Shen
Summary: This study presents an asymmetric soft-structure functional surface (ASFS) that can directionally transport liquids, achieve liquid mixing, and has intelligent response ability by utilizing the intrinsic properties of the liquids. It opens new avenues for application-oriented liquid operation surfaces.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Analytical
Han Huang, Yu Feng, Xiong Yang, Liu Yang, Yajing Shen
Summary: This paper introduces an insect-scale soft robot inspired by the locomotion of insects in nature, with four different gaits and excellent performance, such as high load-carrying capacity, low cost, strong obstacle-crossing capability, suitable for a variety of applications.
Article
Nanoscience & Nanotechnology
Zhenghua Zhao, Mingjie Liu, Kai Zhou, Lidong Guo, Yajing Shen, Dan Lu, Xin Hong, Zongbi Bao, Qiwei Yang, Qilong Ren, Peter R. Schreiner, Zhiguo Zhang
Summary: Phenoxyl radicals derived from phenols have been harnessed for photocatalysis due to their stability and mild oxidative activity. A stable and recyclable metal-organic framework Zr-MOF-OH, composed of a binaphthol derivative ligand, has been synthesized and shown to function as an efficient heterogeneous photocatalyst with good catalytic activity and substrate compatibility for the selective oxidation of sulfides to sulfoxides under visible light irradiation. The photocatalytic process involves the conversion of phenolic hydroxyl groups to phenoxyl radicals through excited state intramolecular proton transfer, with triplet O2 directly participating in the reaction, providing wide substrate compatibility and high selectivity.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Chang Xu, Yali Liu, Jiayan Li, Peng Ning, Zhong Shi, Wei Zhang, Zhenguang Li, Ruimei Zhou, Yifan Tong, Yingze Li, Cheng Lv, Yajing Shen, Qian Cheng, Bin He, Yu Cheng
Summary: This study proposes a photomagnetically powered nanomachine (PMN) with a spiky surface and thermally dependent viscosity tunability to facilitate mechanical motion in lysosomes for cancer mechanotherapy. The spiky structure endows nanomachines with a photomagnetic coupling effect in the NIR-II region, and PMNs can be efficiently propelled under simultaneously applied dual external energy sources in cell lysosomes. Enhanced mechanical destruction of cancer cells via PMNs is confirmed both in vitro and in vivo under photomagnetic treatment. This study provides a theoretical basis for designing integrated nanomachines with active adaptability to physiological environments for cancer treatment.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Zhihao Jin, Yajing Shen, Xianfu Chen, Minghui Qiu, Yiqun Fan
Summary: The introduction of Ce effectively inhibited the phase transformation of TiO2 and prevented cracks, resulting in excellent performance and anti-fouling properties for the Ce-doped TiO2 membrane in protein separation.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Chemical
Zhihao Jin, Minghui Qiu, Juanjuan Wen, Yajing Shen, Xianfu Chen, Yiqun Fan
Summary: In this study, an integrated and thin ZrO2-CeO2 composite ultrafiltration membrane was developed, exhibiting outstanding chemical stability and PVA separation performance under harsh conditions. The membrane also showed high efficiency for chemical cleaning, with stable pore structure and integrity. This high-performance UF membrane has great potential for PVA recovery from desizing wastewater.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Multidisciplinary
Jiaqi Miao, Tieshan Zhang, Gen Li, Dong Guo, Siqi Sun, Rong Tan, Jiahai Shi, Yajing Shen
Summary: This article investigates the motion styles of flagella and cilia and proposes a unified physical model to describe their bending and external motions. The study deepens our understanding of microorganisms' propulsion mechanism and provides new inspirations for biomimetic system design.
Article
Engineering, Civil
Xing Li, Zhenlong Hu, Yajing Shen, Lina Hao, Wanfeng Shang
Summary: The purpose of this study is to optimize the Beetle Antenna Search (BAS) algorithm and apply it to the Intelligent Transportation System (ITS) to address traffic congestion. The study examines the development status of ITS and the application status of the BAS algorithm. It proposes an algorithm with quadratic interpolation optimization, named QIBAS, combined with the Least Squares Support Vector Machine Algorithm (LSSVM). A traffic flow prediction model based on QIBAS-LSSVM is established. The results show that the proposed QIBAS algorithm has a good effect and high accuracy in short-term traffic flow prediction.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2023)
Article
Engineering, Civil
Xing Li, Haotian Zhang, Yajing Shen, Lina Hao, Wanfeng Shang
Summary: This study aims to improve the transmission and sharing efficiency of intelligent transportation data and promote the further development of intelligent transportation and smart city. Through the design of the Energy Efficient Multi-hop Routing (EEMR) algorithm and the deep learning-based TAdam algorithm, the energy balance of network nodes and the minimization of system energy consumption have been achieved. The experimental results show that the EEMR algorithm achieves a network surviving node proportion of over 90% in data collection, while the TAdam algorithm exhibits the fastest convergence speed and the best generalization performance on the test data set.
IEEE TRANSACTIONS ON INTELLIGENT TRANSPORTATION SYSTEMS
(2023)
Article
Biotechnology & Applied Microbiology
Muhammad Asraf Mansor, Mohd Ridzuan Ahmad, Michal Petru, Seyed Saeid Rahimian Koloor
Summary: The electrical characteristics of living cells provide important information about their internal structure and composition changes in the cell membrane. An integrated dual microneedle-microchannel technique is introduced to detect and extract the electrical properties of single cells. This device has the potential to be used for low-cost single-cell screening and detection in developing countries.
ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY
(2023)
Article
Automation & Control Systems
Tieshan Zhang, Hao Ren, Gen Li, Panbing Wang, Wanfeng Shang, Yajing Shen
Summary: In this paper, a general controllable approach for high-precise micro metallic helical structure fabrication is reported, by using a self-developed rotational nanorobotic manipulation system. The method includes end-effector trajectory planning to compensate for the tilted angle during rotation and a hybrid vision and position feedback strategy for automated fabrication. The experimental results demonstrate the high precision of the method in fabricating various micro helical structures. The potential application of these structures as force sensors for soft biomaterial characterization is also demonstrated.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2023)
Article
Microscopy
C. Gao, C. Hofer, T. J. Pennycook
Summary: Ptychography provides high dose efficiency images that can reveal light elements next to heavy atoms. However, contrast reversals can occur when the projected potential becomes strong. Recent research has shown that these reversals can be counteracted by adapting the focus. This study explains why the best contrast is often found with the probe focused to the middle of the sample and highlights the importance of convergence angle in thin samples to remove contrast reversals.
Article
Microscopy
J. Lindner, U. Ross, T. Meyer, V. Boureau, M. Seibt, Ch. Jooss
Summary: Phase-shifting electron holography is an excellent method with high phase sensitivity to reveal electron wave phase information. An advanced drift correction scheme is proposed in this study, which exploits the interface of the TEM specimen and the vacuum area in the hologram. This method allows for obtaining reliable phase information.
Article
Microscopy
Ali Jaberi, Nicolas Brodusch, Jun Song, Raynald Gauvin
Summary: This study investigates knock-on damage in lithium-ion batteries (LIBs) by computing threshold displacement energies (TDEs) and performing Monte Carlo simulation. The results indicate that Li is most sensitive to knock-on damage at moderate electron energies, and TDE is the principal parameter for assessing Li sensitivity to knock-on damage across similar structures.
Article
Microscopy
Alexander Schroeder, Christopher Rathje, Leon van Velzen, Maurits Kelder, Sascha Schaefer
Summary: This study utilizes novel event-based electron detector platforms to extend the temporal resolution of electron microscopy. By training a neural network to predict electron arrival time, the researchers were able to improve the timing accuracy and achieve a promising solution for enhancing electron timing precision in various electron microscopy applications.
Article
Microscopy
Avi Auslender, Nivedita Pandey, Amit Kohn, Oswaldo Dieguez
Summary: This article describes a faster implementation based on DFT for computing the mean inner potential of crystals, providing quantum-mechanical calculations beyond the independent-atom approximation. The study also reveals the dependence of the mean inner potential on sample boundary conditions, mass density, and magnetic susceptibility, highlighting its correlation with various material properties.
Article
Microscopy
Zhidong Yang, Dawei Zang, Hongjia Li, Zhao Zhang, Fa Zhang, Renmin Han
Summary: In this work, we propose a self-supervised deep learning model for cryo-ET volumetric image denoising based on noise modeling and sparsity guidance. Experimental results demonstrate that our method can achieve reliable denoising by training on single noisy volume and outperform existing methods.
Article
Microscopy
J. Kuttruff, J. Holder, Y. Meng, P. Baum
Summary: In this study, a robust clustering algorithm is proposed that can find clusters in a continuous stream of raw data in real time. This algorithm converts pixel hits measured by hybrid pixel detectors to real single-electron events. By continuously comparing with previous hits, the algorithm efficiently identifies the merging of new and old events.
Article
Microscopy
D. G. Senturk, C. P. Yu, A. De Backer, S. Van Aert
Summary: This article presents a statistics-based method for accurately counting the number of atoms in nanostructures, especially for images acquired with low electron doses and multiple element structures.
Article
Microscopy
Mauricio J. Prieto, Lucas de Souza Caldas, Liviu C. Tanase, Thomas Schmidt, Oscar Rodriguez de la Fuente
Summary: This study presents a synchrotron-based investigation of the synthesis process of a magnetite/hematite bilayer. Ion bombardment gradually transforms hematite into magnetite, and the growth of magnetite leads to the formation of stable boundaries. These findings are significant for understanding novel oxide heterostructures.
Article
Microscopy
Emre Yoruk, Holger Klein, Stephanie Kodjikian
Summary: Beam sensitive nanomaterials pose challenges for crystallographic structure determination. A dose symmetric electron diffraction tomography (DS-EDT) method is developed to reduce beam damage and obtain complete data sets by merging individual datasets from multiple crystals.
Article
Microscopy
A. Pofelski, Y. Zhu, G. A. Botton
Summary: The precision and sensitivity of the GPA method for strain characterization is a widely discussed topic. This study introduces the concept of phase noise and analyzes the parameter of sampling to improve the precision of GPA. Experimental and theoretical results demonstrate that using a larger pixel spacing in STEM can enhance the precision and sensitivity of the GPA method.
Article
Microscopy
Sangjun Kang, Di Wang, Christian Kuebel, Xiaoke Mu
Summary: Transmission electron microscopy is a valuable tool for assessing strain fields within materials. However, using thin specimens in TEM analysis can affect atomic configuration and deformation structure.
