Article
Chemistry, Multidisciplinary
James R. Garcia, Mark McCrystal, Dominik Horvath, Harneet Kaur, Tian Carey, Jonathan N. Coleman
Summary: In this study, a new class of piezoresistive nanocomposites was developed by mixing different types of 2D nanosheets. It was found that the conductivity of each nanocomposite type exhibited a different dependence on filler volume fraction, and they also showed different piezoresistive properties. This research expands the understanding of piezoresistive nanocomposites and provides a platform for the engineering of high-performance strain sensors.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Mojtaba Haghgoo, Alireza Alidoust, Reza Ansari, Mohammad Kazem Hassanzadeh-Aghdam
Summary: The pressure/resistance sensitivity of the GNP elastomeric nanocomposite was investigated using a finite element percolation model. The study found that the alignment direction and volume fraction are the dominant factors influencing the resistance response.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Nanoscience & Nanotechnology
Loganathan Veeramuthu, Chia-Jung Cho, Fang-Cheng Liang, Manikandan Venkatesan, G. Ranjith Kumar, Hua-Yi Hsu, Ren-Jei Chung, Chen-Hung Lee, Wen-Ya Lee, Chi-Ching Kuo
Summary: Wearable skin-inspired electronic skins have made remarkable progress in recent years, with promising features such as comfort, lightweight, and durability, leading to significant advancements in wearable sensors and optoelectronics.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Review
Chemistry, Analytical
Lirong Wang, Tailin Xu, Xueji Zhang
Summary: Flexible sensors have shown great potential in various applications such as remote health monitoring and human-machine interfaces. Hydrogels, especially conductive hydrogels, have been increasingly used in wearable sensors, offering features like self-healing and anti-freezing capabilities.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2021)
Article
Materials Science, Composites
Zixuan Chen, Zetian Yang, Tianyu Yu, Zhibiao Wei, Chao Ji, BinBin Zhao, Tao Yu, Weidong Yang, Yan Li
Summary: This study presented a novel flexible and sandwich-structured polydimethylsiloxane (PDMS)@graphene sensor for diverse applications. The PDMS@graphene sensor exhibited resistivity dependence on temperature and strain changes, with a monitoring temperature range of -40 to 300 degrees C and a superlative thermal index of 12015.86 K. The sensor achieved a monitoring resolution of 0.5 degrees C for temperature and 0.0625% for strain, indicating its excellent repeatability. Thus, the innovative flexible PDMS@graphene sensor holds great potential in various fields such as structural components, biomedicine equipment, smart wearable textiles, and safety monitoring.
COMPOSITES SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Bo Li, Wen Liang, Facai Ren
Summary: This research demonstrates that electrohydrodynamic inkjet printing can improve the sensitivity of flexible pressure sensors by directly writing AgNPs patterns on the substrate. The introduction of multilayered structures and the use of soft packaging material enhance the sensing performance. The study compares different sensor structures and presents applications of the sensors.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Chemistry, Multidisciplinary
Jinxia Yuan, Qiang Li, Lifeng Ding, Congcong Shi, Qi Wang, Yulan Niu, Caiyang Xu
Summary: In this study, a flexible piezoresistive pressure sensor was developed using low-cost materials. The sensor exhibited high sensitivity, wide detection range, fast response and recovery time, good durability and flexibility. It also had the ability to monitor and recognize human activities, indicating its great potential in wearable devices and other fields. The preparation process of the sensor was simple, low-cost and environmentally friendly, providing a basis for industrial and commercial applications.
Article
Materials Science, Multidisciplinary
Yixin Wan, Juan Tao, Ming Dong, Li Zhang, Zhengchun Peng, Rongrong Bao, Caofeng Pan
Summary: A flexible intelligent sensing system has been designed to directly monitor the strain distribution of measured objects. The system utilizes PDMS and Ni-Au metal thin film to achieve high sensitivity, fast response time, and excellent mechanical stability. Combined with an ultra-thin flexible signal processing circuit, the system exhibits improved flexibility, sensitivity, and adaptability, providing real-time and precise 2D mapping of strain distribution.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Materials Science, Multidisciplinary
Jia-Yan Gong, Fu-Chang Sun, Yu-Chen Pan, An-Min Fei, Si-Fan Leicheng, Fei-Peng Du, Yun-Fei Zhang
Summary: Recently, flexible wearable health monitoring devices have become portable monitoring devices in human life. Conductive hydrogels with stretchability, toughness, and sensitivity were prepared using a semi-interpenetrating network strategy and cyclic freeze-thaw treatments. These hydrogels have potential applications in flexible wearable strain sensors.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Automation & Control Systems
Kirthika Senthil Kumar, Xiao Xiao, Manivannan Sivaperuman Kalairaj, Godwin Ponraj, Changsheng Li, Catherine Jiayi Cai, Chwee Ming Lim, Hongliang Ren
Summary: This study reports handheld steerable surgical forceps equipped with skin-like soft stretchable strain sensors to improve perception and achieve direct motion translation through omni-directional continuum joints.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2022)
Article
Chemistry, Multidisciplinary
Yang Cong, Jun Fu
Summary: Hydrogels are multifunctional interface materials between implantable bioelectronic devices and biotissues. They can match the properties of biotissues and reduce mechanical and electrical mismatch. The adhesion between hydrogels and tissues is a major research focus.
Review
Chemistry, Multidisciplinary
Fei Han, Min Li, Huaiyu Ye, Guoqi Zhang
Summary: With recent advancements in flexible and wearable electronic materials, the next generation of skin-mountable and implantable smart devices have great potential for lifestyle modification. Flexible strain sensors, as a core component of wearable electronics, play a crucial role in design and optimization. Efforts have been made to enhance the performance of flexible strain sensors through material design, manufacturing approaches, and various applications.
Article
Chemistry, Multidisciplinary
Yong Long, Bing Jiang, Tianci Huang, Yuxiu Liu, Jianan Niu, Zhong Lin Wang, Weiguo Hu
Summary: Ionic conductive hydrogels have attracted significant attention in flexible/wearable electronics due to their flexibility, tunability, stimulus-response, and self-healing ability. However, traditional hydrogels face challenges such as loss of flexibility and conductivity when exposed to the environment. Organogels have emerged as a promising alternative that can overcome these drawbacks to some extent. This study introduces a self-polymerization reaction to create a super stretchable, anti-drying, and anti-freezing organogel ionic conductor (MOIC). The MOIC is used to construct high-performance triboelectric nanogenerators and multifunctional flexible/wearable sensors, demonstrating its potential for applications in electronic skin, flexible sensors, and human-machine interfaces.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Mohammad Abshirini, Mrinal C. Saha, M. Cengiz Altan, Yingtao Liu
Summary: This work presents a novel approach to synthesize porous conductive polymer nanocomposites (CPNCs) with strain sensing capabilities by combining direct ink writing (DIW) and solvent evaporation induced phase separation. The resulting CPNCs exhibit a microscaled porous network structure, which is formed during the curing cycle induced by solvent evaporation and nonsolvent phase infiltration. The optimal formulation and printing conditions are identified to achieve high sensitivity and flexibility. The sensors made with the optimum conditions are then characterized for long-term piezoresistive applications.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Chemistry, Physical
Xinrui Zhang, Chen Cui, Sheng Chen, Lei Meng, Haonan Zhao, Feng Xu, Jun Yang
Summary: In this study, a dual-cross-linked ionohydrogel was designed using Al3+ to overcome the freezing and water evaporation challenges for ionic hydrogels. The ionohydrogel exhibited excellent mechanical properties, high transparency, high ionic conductivity, robust adhesion, and could detect human motion signals over a wide range of temperatures. Additionally, the superior interfacial adhesion between the ionohydrogel and poly(dimethylsiloxane) enabled sustainable energy generation even at subzero temperatures.
CHEMISTRY OF MATERIALS
(2022)
Article
Thermodynamics
H. Davar, N. M. Nouri, M. Navidbakhsh, S. Sekhavat, A. Ansari
Summary: The study demonstrated that the commercial coating with added aluminum microparticles significantly enhanced condensation heat transfer by significantly increasing the heat transfer coefficient and heat flux.
EXPERIMENTAL HEAT TRANSFER
(2022)
Article
Engineering, Mechanical
H. Davar, N. M. Nouri, M. Navidbakhsh
Summary: The geometry and area of roughened zones on the plate were found to be key parameters affecting the measured values of heat transfer coefficient and heat flux. Different geometries of roughened zones result in different heat transfer performance.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2021)
Article
Engineering, Electrical & Electronic
Mohammad Nankali, Norouz Mohammad Nouri, Nima Geran Malek, Morteza Amjadi
Summary: This study presents a temperature-dependent 3D percolation model for predicting the sensory response of stretchable strain sensors in complex environmental conditions. Experimental results validate the model's effectiveness for assessing the dynamic response characteristics of strain sensors.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Engineering, Multidisciplinary
Noureddin Sakhavi, Nowrouz Mohammad Nouri
Summary: The study demonstrates that the generalized velocity model can reduce the sensitivity of multipath phased array flowmeters to flow field, enhancing measurement accuracy. The average relative errors are within 1.64% under symmetric and asymmetric flow fields.
Article
Engineering, Marine
Ali Amini, Nowrouz Mohammad Nouri, Aria Abedi, Maryam Kamran
Summary: Surface piercing propellers with ventilation on the blades provide better control of cavitation/aeriation and improved thrust performance at operational conditions. There is a lack of research on improving their performance at low speeds, but the present study shows that adjusting the ventilation immersion ratios and advance coefficients can lead to significant improvements in thrust coefficient.
Article
Engineering, Multidisciplinary
M. Kamran, N. M. Nouri
Summary: Improving the performance of surface-piercing propellers requires the design and construction of a model test mechanism. This study focused on designing and calibrating a test setup capable of testing propellers. A four-component dynamometer was designed to measure the propeller's torque and forces. The calibration coefficients were obtained using ANOVA methods and the performance test results were presented for the HL001 propeller.
Article
Engineering, Ocean
M. Kamran, N. M. Nouri, H. Askarpour
Summary: The research focuses on the investigation of the effect of trailing edge shape on ventilation cavity development and surface-piercing propeller (SPP) performance. Numerical simulations and experimental data show that changes in trailing edge shape significantly affect thrust and torque coefficients, while the impact on efficiency is relatively small. The study also reveals that SPPs with a larger angle to the chord line and shorter height have better overall performance and ventilation cover behind the blade.
APPLIED OCEAN RESEARCH
(2022)
Article
Materials Science, Ceramics
Ali Ansari, Nowrouz Mohammad Nouri
Summary: In this research, a one-step and environmentally friendly method was used to prepare a superhydrophobic surface that can be implemented on a large scale. Silica nanoparticles were made hydrophobic through the silanization method, mixed with titanium dioxide nanoparticles and fluorinated ethylene propylene (FEP), and deposited on an aluminum substrate using an electrostatic spraying method. The fabricated surface showed a contact angle over 150° and exhibited excellent photocatalytic activities in the degradation of organic materials.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Marine
N. M. Nouri, M. Kamran
Summary: This study evaluates the relationship between the geometric parameters of a surface piercing propeller and its hydrodynamic characteristics through computational fluid dynamics and design of experiments. The results show that trailing edge variations can significantly affect the propeller's performance.
Article
Engineering, Marine
Nowrouz Mohammad Nouri, Mehdi Zare
Summary: This paper investigates the two-dimensional sound source localization of stationary targets using only three receivers. Flow-induced noise is simulated numerically to obtain time delays and estimate the bearing angle of the sound source. A pure geometric algorithm is used to obtain source candidate locations, and an elimination algorithm is used to remove ambiguity and imaginary locations. The effectiveness of this process is validated through a physical algorithm.
Article
Materials Science, Ceramics
Ali Ansari, Nowrouz Mohammad Nouri
Summary: A repeatable and environmentally friendly method was used to prepare a hydrophobic surface with photocatalytic features. Titanium dioxide nanoparticles and fluorinated ethylene propylene (FEP) resins were applied on an aluminum substrate using layer-by-layer and mixing methods. The prepared films were analyzed and the photocatalytic activities were explored. The hydrophobicity and photocatalytic performance were better in the samples with one layer of titanium dioxide and three layers of FEP in the layer-by-layer method, and in the sample containing 10 wt% TiO2 in the mixing method.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Marine
Mehdi Zare, Nowrouz Mohammad Nouri
Summary: Complex networks are a novel technique used to analyze spatiotemporal aero-hydro acoustic field. This study transforms acoustic pressure signals into natural visibility graphs using the complex network algorithm and unveils their hidden signatures. The spatial variations of network metrics are explored, and a connection is established between these variations and their physical interpretations. The results highlight the universal characteristic of power-law degree distribution in all networks.
Article
Engineering, Marine
Mehdi Zare, Nowrouz Mohammad Nouri
Summary: This article explores the feature extraction of marine vessel-radiated noise (MVRN) under complex ocean backgrounds. A hybrid approach based on improved empirical mode decomposition (IEMD) and measuring complexity is presented. By using the IEMD algorithm and comparing it with other expansion methods, the analysis shows that IEMD effectively reduces the restriction of end-effects. Furthermore, IEMD, classic EMD (CEMD), and variational mode decomposition (VMD) algorithms are used to extract IMFs for different types of MVRN, and statistical complexity measures are employed to improve signal separability and stability.
Proceedings Paper
Engineering, Electrical & Electronic
Mohammad Amin Amindehghan, Mohammad Nankali, Norouz Mohammad Nouri
Summary: This study introduces a stretchable nanocomposite strain sensor based on conductive polymer nanocomposite materials, which shows improved performance by optimizing nanofillers concentration, curing temperature of the polymer, and mechanical pre-stretching. The sensor exhibits decreased hysteresis error and increased linearity and sensitivity, but still faces relaxation errors due to the viscoelastic nature of elastomers.
2021 9TH RSI INTERNATIONAL CONFERENCE ON ROBOTICS AND MECHATRONICS (ICROM)
(2021)
Article
Thermodynamics
H. Davar, N. M. Nouri, M. Navidbakhsh
Summary: Different hydrophobic and superhydrophobic coatings were studied for their effects on condensation heat transfer characteristics of plates, with Danphobix showing higher heat flux and transfer coefficients. Varying the thickness of Danphobix coating enhanced condensation heat transfer, with the best results seen at a thickness of 17 μm. The results showed a significant increase in heat flux and transfer coefficients compared to non-coated plates.
JOURNAL OF APPLIED FLUID MECHANICS
(2021)
