Article
Materials Science, Multidisciplinary
Sanjay Dharmavaram, Hossein Ebrahimi, Ranajay Ghosh
Summary: This study develops a geometrically exact model to investigate the behavior of a filamentous structure under bending and twisting loads, considering the influence of protruding fish-scale-like plates on the surface. The model reveals the combined effect of bending and twisting on a slender fish-scale inspired substrate, including new interpretations of kinematic behavior, multiple contact regimes, asymmetric sensitivities, and discontinuous transitions.
JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS
(2022)
Article
Multidisciplinary Sciences
Bo Dai, Liang Zhang, Chenglong Zhao, Hunter Bachman, Ryan Becker, John Mai, Ziao Jiao, Wei Li, Lulu Zheng, Xinjun Wan, Tony Jun Huang, Songlin Zhuang, Dawei Zhang
Summary: The study presents a microfluidic-assisted 3D printing technique for fabricating biomimetic compound eyes, mimicking natural eye structures and enabling various applications.
NATURE COMMUNICATIONS
(2021)
Article
Engineering, Multidisciplinary
Yanni Zhou, Yadong Chai, Kurisu Mikami, Motohiro Tagaya
Summary: The mineralization process of highly calcified osseous layers in vivo was successfully imitated by immersing decalcified fish scales in simplified simulated body fluid. A simple biomimetic precipitation process was developed, resulting in externally-mineralized layers similar to the osseous layer containing lower-crystalline hydroxyapatite.
Article
Engineering, Electrical & Electronic
Patrik Gruner, Ines Dorsch, Christian Waldschmidt
Summary: The article introduces a new design theory for biomimetic antenna arrays (BMAAs) that can provide high angular resolution while occupying little space. By varying the biomimetic coupling, a prototype of a four-antenna element BMAA at 76.5 GHz was designed and tested.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Mechanics
Milad Tatari, Hamid Ebrahimi, Ranajay Ghosh, Ashkan Vaziri, Hamid Nayeb-Hashemi
Summary: Biomimetic fish scale structures on soft substrates provide tailorable and tunable mechanical stiffness. Using finite element simulations, we reveal the kinematics and bending mechanics of these structures. We discover five distinct engagement patterns and a rich landscape of tailorable and variable stiffness.
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
(2023)
Article
Nanoscience & Nanotechnology
Lin Du, Yuxin Li, Xinlian Zhang, Zijian Zhou, Yan Wang, Dalei Jing, Jia Zhou
Summary: Inspired by the physical structure of lotus leaf, we developed a method of one-step fabrication of droplet arrays on a biomimetic structural chip, which reduces the reliance on chemical modification techniques and complex surface preparation techniques, improving the efficiency of droplet array fabrication. The influence of dimensions of the biomimetic structure and preparation process parameters on the preparation rate and uniformity of the droplet arrays were studied, and the application potential of the one-step fabrication method for DNA molecular diagnosis was verified.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Electrical & Electronic
Ines Dorsch, Patrik Gruener, Markus Klose, David Schmucker, Christian Waldschmidt, Patrik Gruner
Summary: This article introduces the use of biomimetic antenna arrays (BMAAs) in radar research to improve the angular resolution of radar sensors. By incorporating BMAAs into multiple-input multiple-output (MIMO) arrays, more degrees of freedom in array design are obtained. The impact of MIMO BMAAs on the angular resolution is analyzed both theoretically and through radar measurements, showing a significant increase in angular separability.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2021)
Article
Nanoscience & Nanotechnology
Chi Zhang, Mengxi Wu, Ming Li, Lixuan Che, Zhiguang Tan, Di Guo, Zhan Kang, Shuye Cao, Siqi Zhang, Yu Sui, Jining Sun, Liding Wang, Junshan Liu
Summary: This paper presents the development of a nanocrack-based electronic whisker-type mechanosensor with a detection resolution of 72.2 nN. The sensor can perceive subtle mechanical stimuli and recognize surface morphology with a resolution of 30 nm. It is also used in wearable devices for sensing the body's posture and movements, enabling remote monitoring of falls in elderly people.
MICROSYSTEMS & NANOENGINEERING
(2023)
Article
Multidisciplinary Sciences
Yucheng Ding, Gongze Liu, Zhenghao Long, Yu Zhou, Xiao Qiu, Beitao Ren, Qianpeng Zhang, Cheng Chi, Zhu'an Wan, Baoling Huang, Zhiyong Fan
Summary: This article presents a biomimetic infrared imaging device inspired by the design of pit organs in snakes. The device uses ionic thermoelectric polymer nanowires as sensing nerve cells, and successfully demonstrates an infrared sensor array with an ultrawide field of view on a hemispherical substrate.
Article
Multidisciplinary Sciences
Katherine R. Jinkins, Sean M. Foradori, Vivek Saraswat, Robert M. Jacobberger, Jonathan H. Dwyer, Padma Gopalan, Arganthael Berson, Michael S. Arnold
Summary: Semiconducting carbon nanotubes collected at a liquid/liquid interface self-organize into two-dimensional nematic liquid crystals that globally align with flow and can be transferred onto substrates to generate dense arrays aligned within +/- 6 degrees. The alignment and uniformity of the transferred assemblies enable field-effect transistors with exceptional on-state current density and low variation, showing promise for commercial semiconductor electronics.
Article
Engineering, Electrical & Electronic
Ines Dorsch, Dominik Schwarz, Christian Waldschmidt
Summary: Biomimetic antenna arrays inspired by the fly Ormia ochracea have shown improved angle estimation capabilities of radar sensors, but at the cost of decreased detectability of weak radar targets. A electronically switchable two-element biomimetic antenna array was presented for the first time, providing the ability to switch between enhanced phase sensitivity and better signal-to-noise ratio modes. Radar measurements verified that phase sensitivity could be enhanced by a factor of three with a maximum relative power loss of 14 dB through switching.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2021)
Article
Engineering, Biomedical
Jingjing Xia, Zhuo Xiong, Jiaxuan Guo, Yongan Wang, Yuan Luo, Yangyang Sun, Zhongwei Guo, Bingchuan Lu, Ting Zhang, Wei Sun
Summary: Researchers designed a biomimetic multichannel micro-lung chip to mimic the interface between lung epithelium and interstitium for studying pulmonary fibrosis induced by PQ poisoning. The chip-based model showed decreased cell viability and significant changes in fibrosis-related proteins. Co-culturing A549 and MRC-5 cells in the chip induced severe epithelial-mesenchymal transition compared to the non-contact model. This novel co-culture micro-lung chip provides a new approach for studying lung fibrosis and drug development.
Article
Optics
Di Yuan, Bo Liu, Yaozhen Guo, Zhichao Zhu, Mingjie Liu, Chuanwei Cheng, Mu Gu, Shuai Zhou, Qiang Xu, Liang Chen, Jinliang Liu, Xiaoping Ouyang
Summary: A promising method using mixed-scale microstructures composed of a photonic crystal slab and a microlens array demonstrates significant improvements in the light output of scintillators, enhancing X-ray imaging characteristics. The application of these microstructures to scintillators shows potential benefits in the field of nuclear radiation detection.
Article
Engineering, Multidisciplinary
Hua Shao, Bingbing Dong, Changzhen Zheng, Te Li, Qiyang Zuo, Yaohui Xu, Haitao Fang, Kai He, Fengran Xie
Summary: This paper proposes a novel deformable caudal fin platform to improve the thrust generation of biomimetic robotic fish. It introduces the design of the deformable caudal fin and an improved Central Pattern Generator (CPG) model for coordinated control. The experiments show that instant mode of the caudal fin achieves the largest thrust, with a 27.5% improvement compared to the conventional nondeformable mode.
Article
Materials Science, Multidisciplinary
Halar Memon, Davide S. A. De Focatiis, Kwing-So Choi, Xianghui Hou
Summary: The liquid-infused polymeric surfaces with promising icephobicity face challenges in maintaining performance after material damage. Inspired by cetacean skin, glycerol-infused fiber-reinforced polyurethane (GIFRP) coatings have been developed to delay water droplet freezing and reduce ice adhesion under erosion tests. Incorporating fibers in the coatings has proven beneficial for infused-liquid replenishment and slow-releasing capabilities, leading to minimal ice adhesion even after substantial surface damage.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Biophysics
Qianhui Li, Franziska Hegner, Christoph Bruecker
JOURNAL OF BIOMECHANICAL ENGINEERING-TRANSACTIONS OF THE ASME
(2020)
Article
Engineering, Aerospace
Omar Selim, Erwin R. Gowree, Christian Lagemann, Edward Talboys, Chetan Jagadeesh, Christoph Brucker
Summary: The peregrine falcon was observed to adopt specific flight configurations during high-speed pullout, resulting in aerodynamic advantage due to lift-generating vortical structures over the wing. Wind-tunnel experiments and computational fluid dynamics simulations demonstrated the importance of hand wing deployment in creating extra vortex lift for increased stability and responsiveness.
Article
Acoustics
Edward Talboys, Thomas F. Geyer, Florian Pruefer, Christoph Bruecker
Summary: This study investigates the acoustic properties of a standard NACA 0012 airfoil with additional self-oscillating passive flaplets for self-noise reduction. Different flaplet configurations were observed to affect the oscillation and reduction of tonal noise.
Article
Engineering, Mechanical
Qianhui Li, Evangelos Stavropoulos-Vasilakis, Phoevos Koukouvinis, Manolis Gavaises, Christoph H. Bruecker
Summary: This study developed a method for calibrating wall-shear stress sensors in complex geometries, assisted by numerical simulation data. By calibrating and testing in the aorta model, it demonstrated the different impacts of two different heart valves on wall-shear stress in the aortic arch.
JOURNAL OF FLUIDS AND STRUCTURES
(2021)
Article
Thermodynamics
Zhihan Zhang, Qianhui Li, Christoph Bruecker, Qiang Zhang
Summary: This paper presents a combined experimental and numerical study on high-amplitude intermittent impingement cooling. The results show a remarkable improvement in overall cooling efficiency, especially in the wall jet region.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Multidisciplinary Sciences
Raphael Glick, Muthukumar Muthuramalingam, Christoph Brucker
Summary: Previous research has shown that sea lions are able to detect the direction of oncoming vortices using their whiskers. In this study, a theoretical model based on multilateration is presented and tested through experimental studies. The results demonstrate that arrays of whiskers can function as antennas to determine the direction of arrival.
SCIENTIFIC REPORTS
(2022)
Article
Thermodynamics
Alecsandra Court, Omar Selim, Keith Pamment, Christoph Bruecker
Summary: This paper investigates the flow control mechanism induced by the dynamic motion cycles of bio-inspired flaplets on a model wing. The experiment results show that the opening of flaplets induces backflow underneath, while the closure generates a forward directed jet, which re-energizes the boundary layer flow upstream. This study provides insights into the action of pop-up feathers for separation control and gust control.
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW
(2023)
Article
Physics, Fluids & Plasmas
Omar Selim, Christoph Brucker
Summary: This paper introduces a novel approach to sense and characterize flow over an aerofoil using arrays of flexible wind-hair-like sensors. The sensors provide real-time readings of local flow information with high temporal resolution, and were tested in a wind tunnel with varying angles of attack. The sensors were able to detect low-frequency oscillations, potentially linked to the breathing modes of the laminar separation bubble.
Review
Energy & Fuels
Elisa Colas, Elena-Maria Klopries, Deyan Tian, Maike Kroll, Michael Selzner, Christoph Bruecker, Kavan Khaledi, Peter Kukla, Axel Preusse, Carolina Sabarny, Holger Schuettrumpf, Florian Amann
Summary: This paper explores the potential of using abandoned mines as lower reservoirs for Underground Pumped Storage Power Systems (UPSPs) and addresses the challenges associated with repurposing coal mines. Numerical solutions to mitigate cyclical processes in abandoned mines are presented, and the economic feasibility of repurposing mines is assessed.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Physics, Fluids & Plasmas
Raphael Glick, Muthukumar Muthuramalingam, Christoph Brucker
Summary: The study demonstrates that coherent vortical structures can be detected by analyzing the bending deformations of whiskers, even in noisy environments. This has important implications for developing sensory systems that can overcome high noise levels.
Article
Engineering, Multidisciplinary
Muthukumar Muthuramalingam, Edward Talboys, Hermann Wagner, Christoph Bruecker
Summary: This study presents a novel mechanism for laminar flow control on straight and backward swept wings, inspired by owl feathers. By designing a comb-like device based on owl feather barbs and conducting experiments and numerical studies, the researchers found that this device creates a flow turning effect in the boundary layer to counteract cross-flow, ultimately delaying transition. The observed effect is expected to contribute to a more silent flight in owl flight.
BIOINSPIRATION & BIOMIMETICS
(2021)
Article
Biotechnology & Applied Microbiology
Ch Bruecker, Qianhui Li
BIOENGINEERING-BASEL
(2020)
