Article
Mechanics
Hoo Min Lee, Gil Ho Yoon
Summary: The study introduces a novel size optimization method to control the buckling mode shape and buckling temperatures of plates by combining finite element simulation and a size optimization scheme, mainly based on the influence of plate thickness.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Civil
Hoo Min Lee, Kang Kuk Lee, Gil Ho Yoon
Summary: This study aims to achieve the thermal structural stability of composite plate structure by developing a topography optimization method and a size optimization method. The validity of the approach is demonstrated through solving several structural optimization problems and an engineering application on reaction turbine blades.
THIN-WALLED STRUCTURES
(2022)
Article
Engineering, Mechanical
Zhuohui Zeng, Hongyu Yu, Xian Chen
Summary: An optical approach was employed to characterize the buckling of silicon microribbons on pre-stretched PDMS substrates in real-time. The study revealed that partially buckled patterns were energetically stable and could bridge the unbuckled and fully buckled states.
EXTREME MECHANICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Hui Deng, Yingshun Cheng, Zekun Chen, Xiao Lin, Jionghua Wu, Qiao Zheng, Caixia Zhang, Shuying Cheng
Summary: This study develops flexible substrate-structured antimony sulfide (Sb2S3) solar cells and improves their performance through back interfacial selenization. The inclusion of a 20 nm MoSe2 layer between the Sb2S3 film and Mo foil improves interfacial energy band alignments and induces the [hk1]-orientation of the Sb2S3 film, resulting in defect passivation and enhanced carrier transport capacity.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Coatings & Films
F-Z Abbes, C. Coupeau, J. Durinck, M. Talea, Y. Ni, G. Parry
Summary: This study investigates the post-buckling equilibrium shapes that develop on parallel delaminated stripes of films under biaxial compressive stress, with a focus on the effect of substrate elasticity on the expected buckled morphologies. Finite element methods are used to simulate various equilibrium configurations, resulting in a morphological map showing that the stability domains of elementary buckles shift to lower stresses as substrate stiffness decreases and the stability domain of telephone cord buckles is enlarged. An intermediate domain between bubbles and straight-sided/telephone cord buckles is identified, characterized by hook-like or bone-like structures.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Crystallography
Limei Lin, Rui Da, Chenqi Zheng, Ruibo Zeng, Junda Ding
Summary: CuPbSbS3 has excellent photoelectric properties and a suitable band gap, making it a promising material for high-quality thin film solar cells. It also has a three-dimensional structure that allows for carrier transportation in multiple directions, providing potential for performance regulation. The study successfully prepared CuPbSbS3 films on a stable Mo substrate and achieved a photoelectric conversion efficiency of 0.094%, providing a tentative exploration for the future development of substrate structured CuPbSbS3 solar cells.
Article
Mechanics
Jiaojiao Guo, Meng Shui, Langquan Shui
Summary: This article emphasizes the importance of explicit analytical description for the deep post-buckling behaviors of substrate-free films. Using the Galerkin method, a high-precision analytical description is proposed for films under complex in-plane biaxial loads. The study suggests that the correct solution for deep post-buckling bifurcation/secondary buckling requires a complete dynamic model.
INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS
(2023)
Article
Chemistry, Multidisciplinary
Yuanteng Jiang, Ke Zhan, Jie Xia, Min Zhao
Summary: Stability is critical in structural design. This study proposes a model to solve the problem of buckling-constrained topology optimization under design-dependent loads. The Kreisselmeier-Steinhauser aggregation function is used to reduce multiple constraints to a single one. The proposed optimization algorithm, based on finite element and sensitivity analyses, is proven effective and reliable through numerical examples.
APPLIED SCIENCES-BASEL
(2023)
Article
Biophysics
Laura Russbach, Mary Ecke, Joachim O. Raedler, Charlott Leu, Gunther Gerisch
Summary: Cell migration on an adhesive substrate surface involves protrusion and retraction of the cell, as well as adhesion and detachment to and from the substrate. Dictyostelium discoideum cells exhibit different responses to chemotactic gradients when exposed to patterned substrate surfaces. Cells that avoid nonadhesive areas move tangentially, with their tail at the border of the adhesive surface.
BIOPHYSICAL JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Yancheng Meng, Baowen Li, Luxian Li, Jianqiang Zhang
Summary: The buckling behavior of graphene on soft films has been extensively studied. This experiment systematically investigates the buckling behavior of monolayer, three-layer, and four-layer graphene on soft films under large compression. The cross-sections of buckling patterns are provided using FIB technology. Furthermore, the modulus of few-layer graphene is calculated, and it is found that the modulus is independent of the number of graphene layers when the number is less than four.
Article
Engineering, Civil
Valentina Tomei, Ernesto Grande, Maura Imbimbo
Summary: The current literature presents various examples of structural optimization aimed at obtaining safe and lightweight solutions, with recent studies focusing on the impact of geometric imperfections on the optimization process. This paper evaluates the efficacy of previous approaches for structural optimization in grid-shells, specifically considering the presence of geometric imperfections through numerical analyses with different scenarios and case studies.
ENGINEERING STRUCTURES
(2021)
Article
Chemistry, Multidisciplinary
Fengwen Wang, Marie Brons, Ole Sigmund
Summary: Stretch-dominated truss and plate microstructures are competing in the development of highly rigid and strong architected materials. Although closed-cell isotropic plate microstructures meet theoretical upper bounds on stiffness, they have low buckling strength, whereas open-cell truss microstructures have high buckling strength but reduced stiffness. Hollow truss lattice and hierarchical microstructures outperform both in terms of buckling strength, but are challenging to build. In this study, single-scale non-hierarchical microstructures are designed, built, and tested, surpassing the buckling strength of hollow truss lattice and plate microstructures. The microstructures are realized with 3D printing and both experiments and numerical modeling validate the theoretical predictions.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Jun Ho Oh, Ju Yeon Woo, Sunghwan Jo, Hee Min Yang, Chang-Soo Han
Summary: We report a metal/polymer layered structure that can control transparency and surface morphology through the application of strain. The applied strain causes the micro-pattern on the surface to buckle, resulting in changes in transparency. Stretching the substrate widens the micro-pattern and transitions the substrate from opaque to transparent. Further stretching causes additional buckling and opacity. The sliding behavior of water droplets on the substrate is influenced by these micro-patterns.
SURFACES AND INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Yuting Wang, Yingchun Su, Yanping Zhang, Menglin Chen
Summary: Nanocomposite percolation networks are of increasing interest in the field of wearable devices. By adjusting the contact area, the overall resistance and strain sensor's gauge factor of the network can be controlled.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Mathematics, Applied
Andrea Cristofari, Francesco Rinaldi
Summary: This paper presents an optimization method for structured optimization problems with sparse solutions, demonstrating good scalability in handling dimensionality and number of atoms. Global convergence to stationary points is analyzed, and it is shown that the algorithm can identify a specific subset of atoms with zero weight in the final solution under suitable assumptions.
SIAM JOURNAL ON OPTIMIZATION
(2021)
Review
Chemistry, Multidisciplinary
Xiufeng Wang, Yangchengyi Liu, Huanyu Cheng, Xiaoping Ouyang
Summary: This review highlights the importance of rational design of surface wettability in skin-interfaced sensors and devices to maintain device integrity and enhance sensing performance. Various bioinspired strategies have been used to engineer desired surface wettability for different hydrated conditions. Controlling the liquid behavior on device surfaces through surface wettability design allows for effective collection and analysis of health biomarkers, as well as improved performance of energy harvesters.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Physics, Applied
L. Zhu, X. X. Qu, H. Y. Cheng, K. L. Yao
Summary: This study investigates a van der Waals heterostructure with vertically integrated FeCl2/WSe2/FeCl2 to explore its spin-polarized transport properties, including giant magnetoresistance, spin filtering, and negative differential resistance effect, providing comprehensive spintronics functions.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
Cheng Zhang, Huamin Chen, Xiaohong Ding, Farnaz Lorestani, Chunlei Huang, Bingwen Zhang, Biao Zheng, Jun Wang, Huanyu Cheng, Yun Xu
Summary: This study demonstrates a low-cost, scalable, and facile manufacturing approach for a self-powered wireless sensing platform based on laser-induced graphene foams, which efficiently harvest mechanical energy and provide stable power output. Integration of triboelectric nanogenerators and micro-supercapacitor arrays enables driving various stretchable sensors and wireless transmission modules wirelessly to monitor physiological and biochemical signals.
APPLIED PHYSICS REVIEWS
(2022)
Correction
Physics, Applied
Cheng Zhang, Huamin Chen, Xiaohong Ding, Farnaz Lorestani, Chunlei Huang, Bingwen Zhang, Biao Zheng, Jun Wang, Huanyu Cheng, Yun Xu
APPLIED PHYSICS REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Linna Mao, Taisong Pan, Junxiong Guo, Yizhen Ke, Jia Zhu, Huanyu Cheng, Yuan Lin
Summary: This study proposes a reconfigurable strain modulation design based on soft substrates, which utilizes the reversible phase transition of liquid metal to achieve multiple combinations of operating range and sensitivity.
Review
Chemistry, Multidisciplinary
Ruoxi Yang, Wanqing Zhang, Naveen Tiwari, Han Yan, Tiejun Li, Huanyu Cheng
Summary: This article introduces the emerging highly sensitive and multimodal sensors for various applications in epidermal electronics, robotics, health monitoring devices, and human-machine interfaces. It emphasizes the importance of material selection and sensor structure design in decoupling sensing mechanisms, and discusses methods to decouple different input signals for truly multimodal sensors, as well as strategies for interference suppression and signal correction.
Article
Mechanics
Yangchengyi Liu, Yi Sun, Jielong Huang, Yao Chen, Yazhou Yang, Shaoxing Qu, Huanyu Cheng, Jizhou Song, Xiufeng Wang
Summary: Soft epidermal microfluidics have gained attention for their ability to collect and analyze sweat or interstitial fluid for health monitoring and disease diagnostics. However, these devices are susceptible to structural instability or self-collapse due to their high mechanical compliance and strong adhesion between layers. In this study, a generic mechanical stability model is established to analyze the structural stability of arbitrary-shaped soft microfluidic components, providing essential design guidelines validated by experimental data.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2022)
Review
Chemistry, Multidisciplinary
Ankan Dutta, Huanyu Cheng
Summary: Transient electronic devices have shown promising applications in hardware security and medical implants with diagnosing therapeutics capabilities since their inception. Control of the device transience allows the device to dissolve at will after its functional operation, leading to the development of on-demand transient electronics. This review discusses the recent developments and advantages of triggering strategies (e.g., electrical, thermal, ultrasound, and optical) for controlling the degradation of on-demand transient electronics.
Review
Engineering, Biomedical
Jia Zhu, Honglei Zhou, Ethan Michael Gerhard, Senhao Zhang, Flor Itzel Parra Rodriguez, Taisong Pan, Hongbo Yang, Yuan Lin, Jian Yang, Huanyu Cheng
Summary: The high demand for rapid wound healing has led to the development of multifunctional and smart bioadhesives that can promote accelerated wound healing through real-time sensing and on-demand treatment. However, challenges in designing and fabricating integrated systems remain, presenting opportunities for future development.
BIOACTIVE MATERIALS
(2023)
Article
Physics, Applied
Hui-Kai Zhang, Wei-Tong Chen, Shi-Hao Xu, Jian Wu, Bo Li, Xi-Qiao Feng
Summary: In this paper, an active strategy to manipulate topological phase transitions in elastic topological insulators is proposed. The method combines pneumatic actuation and liquid metals and achieves precise and fast control of topological phase transitions and elastic wave bandgap switching. The work also reveals the active spinning bulk-boundary effects and higher-order topological states in elastic topological insulators, showing the effectiveness and practicability of the proposed method. Additionally, the study specifies the differences between 1D edge and 0D corner higher-order states using information entropy theory.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Cheng Zhang, Xiaohong Ding, Huanyu Cheng, Jinguo Chen, Jindong Gao, Guanglong Tan, Shaobo Bai, Kangwei Weng, Hua Min Chen, Yanhui Yang, Jun Wang
Summary: Integrating wearable gas sensors with energy harvesting and storage devices creates self-powered systems for continuous monitoring of gaseous molecules. However, limited development has been seen due to complex fabrication processes, poor stretchability, and sensitivity. This study presents a low-cost and scalable laser scribing method for crumpled graphene/MXenes nanocomposite foams, which combines stretchable self-charging power units with gas sensors to create a fully integrated standalone gas sensing system.
Article
Nanoscience & Nanotechnology
Li Yang, He Wang, Abu Musa Abdullah, Chuizhou Meng, Xue Chen, Anqi Feng, Huanyu Cheng
Summary: Wearable electrochemical sensors can detect molecular-level information from biochemical markers in biofluids for physiological health evaluation. This study demonstrates the low-cost direct laser writing of porous graphene foam as a flexible electrochemical sensor for detecting biomarkers and electrolytes in sweat. The resulting sensor exhibits high sensitivity and low detection limit for various biomarkers in sweat, offering opportunities for noninvasive continuous monitoring of gout, hydration status, and drug intake/overdose.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Multidisciplinary Sciences
Jaejin Park, Kyubeen Kim, Yujin Kim, Tae Soo Kim, In Sik Min, Bowen Li, Young Uk Cho, Chanwoo Lee, Ju Young Lee, Yuyan Gao, Kyowon Kang, Do Hyeon Kim, Won Jun Choi, Hyun-Beom Shin, Ho Kwan Kang, Young Min Song, Huanyu Cheng, Il-Joo Cho, Ki Jun Yu
Summary: This study presents a wireless, solar-powered, flexible optoelectronic device for neuromodulation in freely moving animals. The device uses high-efficiency, thin photovoltaics to harvest energy from various light sources and powers a Bluetooth system for long-term, on-demand use. The device demonstrated notable capabilities and showed potential for space-free neuromodulating applications.
Review
Engineering, Electrical & Electronic
Weiyi Liu, Huanyu Cheng, Xiufeng Wang
Summary: Wearable devices can dynamically analyze the changes in sweat biomarker levels, allowing for the analysis of pathological and physiological processes. Colorimetric skin-interfaced microfluidic devices have enhanced deformability and small footprints, but struggle with achieving long-term sampling and self-feedback for closed-loop systems. This review summarizes recent advancements in microfluidic valves for biofluid management and chrono-sampling, as well as active triggers in microfluidics self-feedback. After discussing the current limitations in temporal resolution and reliability, potential feasible strategies for future developments are suggested.
NPJ FLEXIBLE ELECTRONICS
(2023)
Article
Materials Science, Multidisciplinary
Xiaohong Ding, Yunchi Cai, Guofei Lu, Jiapeng Hu, Jinyun Zhao, Longhui Zheng, Zixiang Weng, Huanyu Cheng, Jing Lin, Lixin Wu
Summary: This study presents a facile approach to fabricating stretchable superhydrophobic surfaces with different microstructures for multi-stage liquid droplet micro-reactors. The surfaces with arc-shaped air pockets enable droplet micro-reactions, while the surfaces with V-shaped air pockets facilitate the transport of droplets in between reactions.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
