Article
Chemistry, Physical
Trilochan Bhatta, Pukar Maharjan, Kumar Shrestha, Sanghyun Lee, Md Salauddin, M. Toyabur Rahman, S. M. Sohel Rana, Sudeep Sharma, Chani Park, Sang Hyuk Yoon, Jae Yeong Park
Summary: This research introduces a novel approach that utilizes wave energy to generate power and wirelessly transmit information, enhancing the real-time and continuous monitoring of the marine environment. By integrating self-powered wave motion sensors and generators through a specially designed device structure, a self-sustained solution for marine environment monitoring is provided.
ADVANCED ENERGY MATERIALS
(2022)
Review
Chemistry, Analytical
Chuyu Tang, Zhirong Liu, Linlin Li
Summary: Cardiovascular disease is a leading cause of death worldwide. Monitoring cardiovascular indicators in real-time is crucial for early intervention. Flexible wearable/implantable sensors have attracted significant interest for monitoring vital signs. Mechanical sensors, with their high sensitivity and flexibility, can directly reflect pressure fluctuations in the cardiovascular system. This article introduces recent advances in four types of mechanical sensors for cardiovascular monitoring and discusses the importance and challenges of real-time physiological monitoring in cardiovascular disease treatment.
Review
Chemistry, Multidisciplinary
Gaurav Khandelwal, Ravinder Dahiya
Summary: The demand for portable and wearable chemical or biosensors has led to the exploration of mechanical energy harvesters such as piezoelectric and triboelectric generators (TEGs) as sensors or energy harvesters. TEGs have the potential to be used in a wide variety of materials and can convert mechanical energy to electricity, making them promising for autonomous chemical and biological sensors. This review focuses on the applications and development of TEGs as self-powered active chemical and biological sensors, and discusses the influence of environmental factors, various figures of merit, and the significance of TEG design.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Hao Lei, Jie Xiao, Yunfeng Chen, Jiwei Jiang, Renjie Xu, Zhen Wen, Bin Dong, Xuhui Sun
Summary: The study presents a self-powered triboelectric sensor inspired by bamboo, with high sensitivity and wide detection range, fabricated using 3D printing and freeze-drying processes. By incorporating unique bamboo-joint microstructures, the sensor is capable of detecting ultra-low pressures and has an ultra-fast response time.
Article
Materials Science, Multidisciplinary
Chankyu Han, Jungrak Choi, Junseong Ahn, Hyunjin Kim, Ji-Hwan Ha, Hyeonseok Han, Seokjoo Cho, Yongrok Jeong, Jimin Gu, Inkyu Park
Summary: Self-powered triboelectric pressure sensors are becoming popular due to their energy efficiency. However, the accuracy of measurement is affected by various factors. To address this, a mechanically induced spike-based self-calibration method is proposed. This sensor has potential applications in precision agriculture.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Review
Chemistry, Physical
Francisco Javier del Campo
Summary: Self-powered electrochemical sensors combine the selectivity of sensors with the simplicity of power sources. However, their low power outputs limit their applications in IoT and m-Health. Current research focuses on finding higher energy electrodes, introducing photoelectrochemical systems, using capacitors to increase sensitivity and power output, and using degradable materials to reduce environmental impact.
CURRENT OPINION IN ELECTROCHEMISTRY
(2023)
Article
Nanoscience & Nanotechnology
Kening Wan, Arnaud Kernin, Leonardo Ventura, Chongyang Zeng, Yushen Wang, Yi Liu, Juan J. Vilatela, Weibang Lu, Emiliano Bilotti, Han Zhang
Summary: This article discusses the development of high-performance self-powered sensors in advanced composites, with a focus on harnessing the thermoelectric effect to convert temperature gradients into electrical energy. The study presents a novel approach using a temperature-induced self-folding process and continuous carbon nanotube veils to increase power output and collect thermal energy from the out-of-plane direction. The results demonstrate real-time self-powered deformation and damage sensing in fabricated composite laminates using only a 17-degree Celsius thermal gradient.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Review
Chemistry, Multidisciplinary
Marc Parrilla, Karolien De Wael
Summary: This review emphasizes the importance of combining innovative energy harvesting technologies with top-notch wearable self-powered sensors and low-powered electrochemical sensors in order to create battery-free, self-sustainable devices for health and wellbeing management.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Review
Chemistry, Analytical
Sheriff A. Balogun, Omolola E. Fayemi
Summary: This review extensively discusses the current developments in cobalt phthalocyanine multiwalled carbon nanotubes (CoPc-MWCNTs) nanocomposites as potential materials for electrochemical sensors, including their different fabrication methods, modifying electrodes, and the detected analytes. It highlights the unique physicochemical properties of CoPc-MWCNTs and their enhanced redox-active behavior for designing solid electrodes to determine various analytes.
Article
Engineering, Environmental
Chuan Ning, Kai Dong, Wenchao Gao, Feifan Sheng, Renwei Cheng, Yang Jiang, Jia Yi, Cuiying Ye, Xiao Peng, Zhong Lin Wang
Summary: Textiles, considered as the second skin of human beings, play a crucial role in thermal management. A novel smart fiber, utilizing a hollow silicone rubber fiber filled with liquid metal electrode, has been developed to achieve dual functions of thermal regulation and pressure sensing.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Multidisciplinary
Na Wang, Renrong Zheng, Tianxi Chi, Tongxin Jiang, Zan Ding, Xin Li, Shichao Liu, Lifeng Zhang, Haisheng San
Summary: Highly efficient direct energy conversion utilizing the betavoltaic effect is a promising alternative for self-generating power cells. This study demonstrates a betavoltaic-powered electrochemical cell using TiO2 nanotube arrays and carbon nanotubes, showing high energy conversion efficiency and strong electrochemical reaction capabilities.
COMPOSITES PART B-ENGINEERING
(2022)
Review
Chemistry, Physical
Ping Sun, Saihua Jiang, Yubin Huang
Summary: This research reviews the application of safety monitoring based on NG, showing the potential of NG in monitoring safety-related information about environments, machines, and human bodies, and proposing that NG sensors will bring a new low-cost, precise, and intelligent way for safety monitoring.
Review
Chemistry, Physical
Austin Chang, Cameron Uy, Xiao Xiao, Jun Chen
Summary: This article reviews the recent progress of triboelectric nanogenerators in environmental monitoring, with a focus on their applications in air, soil, and water chemical sensing. The technology is of great significance in self-powered environmental monitoring.
Article
Materials Science, Multidisciplinary
Jihua Zhang, Xiaoyan Liu, Hao Wang, Huadong Feng, Weitao Zao
Summary: Sensor technology plays a crucial role in monitoring organic contaminations in water for current industries. Highly sensitive carbon nanotube (CNT) based silicone rubber composites (CNTRs) were used as sensing materials, with the addition of hybrid carbon blacks (CBs) to prepare CNT/CB composites for better conductivity and stability. The composites showed improved sensing capacities and stable responses, especially when in contact with toluene and water, leading to the design of a sensing application for toluene suspensions on water.
Review
Chemistry, Multidisciplinary
Long Zheng, Mengzhu Cao, Yan Du, Quanyi Liu, Mohammed Y. Emran, Ahmed Kotb, Mimi Sun, Chong-Bo Ma, Ming Zhou
Summary: This article discusses the importance of integrating nanoscale catalysts mimicking enzymatic functions into electrochemical devices and their potential in innovative applications such as real-time health monitoring and environmental detection. It also explores the challenges and progress in incorporating these catalysts into wearable and portable platforms.
Article
Engineering, Manufacturing
Rushikesh S. Ambekar, Eliezer F. Oliveira, Brijesh Kushwaha, Varinder Pal, Leonardo D. Machado, Seyed Mohammad Sajadi, Ray H. Baughman, Pulickel M. Ajayan, Ajit K. Roy, Douglas S. Galvao, Chandra S. Tiwary
Summary: This study focuses on enhancing the strength of materials by adjusting the topology/geometry, with a specific investigation on the mechanical properties of zeolite-templated carbon nanotube networks. The results show that 3D printed structures are able to withstand high compressive loads without structural failure, making them suitable for ultralight aerospace and automotive parts.
ADDITIVE MANUFACTURING
(2021)
Article
Nanoscience & Nanotechnology
Yue Wang, Zhong Wang, Zhenyong Lu, Monica Jung de Andrade, Shaoli Fang, Zhiqiang Zhang, Jinping Wu, Ray H. Baughman
Summary: Materials that dynamically respond to their environment, especially lotus fiber yarn muscles, provide large tensile and torsional strokes with high work capacity and efficiency, showing great potential for applications in artificial muscles, soft robotics, and smart textiles.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Acoustics
Prashant Kumar, Rammohan Sriramdas, Ali E. Aliev, John B. Blottman, Nathanael K. Mayo, Ray H. Baughman, Shashank Priya
Summary: Carbon nanotube sheets with low heat capacity are used to develop thermoacoustic projectors (TAPs) for a wide range of frequencies. The sound pressure level of CNT-based TAPs is proportional to frequency, but performance decreases at low frequencies, requiring identification of governing parameters to enhance performance. A comprehensive model involving structure-fluid-acoustic interactions sheds light on the behavior of CNT-based TAPs.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Automation & Control Systems
Bum-Joon Kim, Yongwoo Jang, Ji Hwan Moon, Ray H. Baughman, Seon Jeong Kim
Summary: The novel accelerometer based on coiled carbon nanotube yarn demonstrates excellent dynamic sensing performance in the low-frequency range and is designed in a compact fiber-like structure for practical applications. Open-circuit voltage signals generated during the stretch-and-release process increase linearly with acceleration, and when attached to a vehicle's seatbelt, the accelerometer generates OCV changes in response to specific acceleration changes.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Chemistry, Physical
Sijie Wan, Ying Chen, Shaoli Fang, Shijun Wang, Zhiping Xu, Lei Jiang, Ray H. Baughman, Qunfeng Cheng
Summary: The study used covalent and pi-pi inter-platelet bridging to permanently freeze the stretch-induced alignment of graphene sheets, increasing the isotropic in-plane sheet strength to 1.55 GPa, while maintaining a high Young's modulus, electrical conductivity and weight-normalized shielding efficiency. The graphene sheets fabricated at near room temperature are scalable and can be easily bonded together using a commercial resin without significantly decreasing performance.
Article
Materials Science, Composites
Tanvir Sohail, Sushan Nakarmi, Rebekah Sweat, Ray Baughman, Hongbing Lu, Samit Roy
Summary: The objective of this paper is to predict the fiber/matrix interfacial debond strength in composites. A novel approach using atomic force microscopy and Fourier series-decomposition is presented to determine the surface roughness and interfacial shear strength.
COMPOSITE INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Xinghao Hu, Jingjing Jia, Yingming Wang, Xintian Tang, Shaoli Fang, Yilun Wang, Ray H. Baughman, Jianning Ding
Summary: A fast thermally powered sheath-driven yarn muscle using a hybrid CNT sheath and an inexpensive polymer core has been reported. Compared to traditional muscles, the stroke recovery rate of this yarn muscle is lower, but it has higher mechanical power during the full contraction cycle.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Zhong Wang, Tae Jin Mun, Fernando M. Machado, Ji Hwan Moon, Shaoli Fang, Ali E. Aliev, Mengmeng Zhang, Wenting Cai, Jiuke Mu, Jae Sang Hyeon, Jong Woo Park, Patrick Conlin, Kyeongjae Cho, Enlai Gao, Gang Wan, Chi Huynh, Anvar A. Zakhidov, Seon Jeong Kim, Ray H. Baughman
Summary: This study improves the performance of twistron harvesters by optimizing the alignment of precursor CNT forests, stretching the precursor twisted yarn, applying higher tensile loads during pre-coiling, using electrothermal pulse annealing, and incorporating reduced graphene oxide nanoplates. The peak output power is significantly increased at both 1 Hz and 30 Hz frequencies, with the latter achieving a 13-fold improvement compared to previous harvesters. The maximum energy conversion efficiency is also greatly improved. Twistron anode and cathode yarn arrays are stretched out-of-phase to double the output voltage.
ADVANCED MATERIALS
(2022)
Article
Acoustics
Ali E. Aliev, David H. Mueller, Kylie N. Tacker, Nathanael K. Mayo, John B. Blottman, Shashank Priya, Ray H. Baughman
Summary: This study addresses the problem of coupled panel-cavity vibrations in high power, low frequency, encapsulated thermoacoustic sound projectors. By using scanning laser vibrometry and sound pressure measurements, the resonance modes in these projectors were studied. The results showed a deviation from theoretical predictions, which were attributed to the coupled panel-cavity modes produced by varying pressure within the cavity. The effect of plate and cavity thickness on the projector performance was also analyzed.
JOURNAL OF SOUND AND VIBRATION
(2022)
Article
Physics, Applied
Enlai Gao, Xiaoang Yuan, Steven O. Nielsen, Ray H. Baughman
Summary: In this study, theoretical expressions for predicting the upper bounds of Young's modulus and gravimetric Young's modulus were developed and verified through experiments. Additionally, the application of lateral pressure on carbyne crystals showed that the calculated values were close to the predicted bounds.
PHYSICAL REVIEW APPLIED
(2022)
Article
Chemistry, Multidisciplinary
Victor G. Desyatkin, William B. Martin, Ali E. Aliev, Nathaniel E. Chapman, Alexandre F. Fonseca, Douglas S. Galvao, Ericka Roy Miller, Kevin H. Stone, Zhong Wang, Dante Zakhidov, F. Ted Limpoco, Sarah R. Almahdali, Shane M. Parker, Ray H. Baughman, Valentin O. Rodionov
Summary: In this study, multilayer gamma-Graphyne was synthesized through crystallization-assisted irreversible cross-coupling polymerization and comprehensively characterized. Experimental results showed that gamma-Graphyne is a 0.48 eV band gap semiconductor with a specific crystal structure. The reported methodology is scalable and applicable to other allotropes of the graphyne family.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Multidisciplinary Sciences
Xiaoyu Hu, Jiatian Li, Sitong Li, Guanghao Zhang, Run Wang, Zhongsheng Liu, Mengmeng Chen, Wenqian He, Kaiqing Yu, Wenzhong Zhai, Weiqiang Zhao, Abdul Qadeer Khan, Shaoli Fang, Ray H. Baughman, Xiang Zhou, Zunfeng Liu
Summary: This paper reports an artificial muscle controlled by thermodynamic-twist coupling, which can be used in different actuation modes, such as elongation, contraction, and torsional rotation. It provides a new design strategy for intelligent materials.
NATIONAL SCIENCE REVIEW
(2023)
Article
Materials Science, Composites
Zhong Wang, Ray H. Baughman
Summary: This overview discusses the use of twisted yarns and highly elastic coiled yarns for various applications such as artificial muscles, energy harvesting, sensing, and refrigeration. The fabrication methods for coiled carbon nanotube and polymer yarns are similar, and their properties can be manipulated to achieve elasticity, actuation, cooling, energy harvesting, and sensing capabilities. The performance of these yarns is remarkable, including artificial muscles with significantly higher power output than human muscles, and mechanical energy harvesters providing higher peak electrical power per weight than existing material-based energy harvesters.
JOURNAL OF COMPOSITE MATERIALS
(2023)
Article
Materials Science, Composites
Tanvir Sohail, Rebekah Sweat, Hongbing Lu, Ray Baughman, Samit Roy
Summary: This paper develops a novel approach to determine the fiber/matrix interfacial shear strength (IFSS) in a polymer composite with carbon fiber roughness and the presence of carbon nanotubes (CNTs). The carbon fiber surface exhibits multi-scale asperities, which are modeled using Fourier series decomposition to capture surface roughness. Molecular Dynamics (MD) simulations are used to determine the interfacial shear strength of different surface asperities. The results show that the presence of CNTs enhances the IFSS by about 19%.
COMPOSITE INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Enlai Gao, Yongzhe Guo, Zhengzhi Wang, Steven O. Nielsen, Ray H. Baughman
Summary: In this study, the stability, strength, and toughness of B, C, BC, and BN chains were investigated using first-principles calculations. It was found that BC chains exhibited the highest recorded gravimetric strength and high toughness, surpassing the predicted performance of carbyne.