Article
Chemistry, Multidisciplinary
Farkhod Azimov, Jihee Kim, Seong Min Choi, Hyun Min Jung
Summary: In this study, the limited performance of alpha-Fe2O3 was greatly improved by optimizing the nanotube structure and combining it with polyaniline. The prepared PANI@alpha-NT-a composite exhibited excellent stability in cycling life and capacitance retention, suggesting the incorporation of conducting polymers through well-controlled nanostructures as a solution to improve the limitations of alpha-Fe2O3 electrode materials.
Article
Nanoscience & Nanotechnology
Miaomiao Yuan, Xiaoying Li, Jingfeng Liu, Youbin Zheng, Li Cheng, Ning Tang, Rongjun Zhang, Shuxiang Xu, Xuemei Fu, Hossam Haick, Yang Xu
Summary: The utilization of SESD for self-powered electrical stimulation in cell culture significantly enhances the efficiency of plasmid transfection, making it a promising platform for high-efficiency plasmid DNA transfection in biomedical research and drug delivery.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Physics, Applied
Samanth Kokkiligadda, Mallikarjuna Reddy Kesama, Sohee Jeon, Jun-Ho Jeong, Sung Ha Park
Summary: In this study, we fabricated two different types of electrodes on flexible drug- and dye-embedded DNA thin films to test their electrical and capacitance properties. By manipulating functional nanomaterials and various types of metal layer electrodes, we can control the physical properties of our samples. Our self-supporting DNA thin films with integrated nanomaterials and durable metal layer electrodes might be employed in future flexible electronic devices.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Chemistry, Inorganic & Nuclear
Haihan Zhou, Yuqin Liu, Mengyao Ren, Hua-Jin Zhai
Summary: A low-cost and scalable method for the fabrication of mechanically exfoliated graphite paper (MEGP) as a current collector in electrochemical capacitors (ECs) is proposed. The MEGP is used to load multi-walled carbon nanotube@polypyrrole (MWCNT@PPy) core-shell hybrids as active materials. The resulting MEGP/MWCNT@PPy electrodes exhibit superior electrochemical properties and high flexibility, with good cycling stability and mechanical deformation resistance.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Review
Chemistry, Analytical
Mohammad Nur-E-Alam, Devendra Kumar Maurya, Boon Kar Yap, Armin Rajabi, Camellia Doroody, Hassan Bin Mohamed, Mayeen Uddin Khandaker, Mohammad Aminul Islam, Sieh Kiong Tiong
Summary: Metal oxide thin films grown using PVD have attracted significant attention for pH sensing applications. The precise control over film properties offered by PVD techniques, along with the exploration of various thin film materials, have led to the development of high-performing pH sensors.
Article
Materials Science, Multidisciplinary
Fariba Moshtaghi, Mardali Yousefpour, Ali Habibolahzadeh
Summary: Polyaniline-Bi-Sb-Te-Se thin films were fabricated on aluminum substrate using electrodeposition and electrochemical reaction method. The structure and morphology of the films were analyzed by FTIR, XRD, FE-SEM, and EDS. The electrical and thermoelectric properties of the films were evaluated, and it was found that the chemical composition and applied potential greatly influenced the thermoelectric properties. Furthermore, a slight change in the chemical compound improved the thermoelectric properties by approximately 65%.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Patrizia Minutolo, Gianluigi De Falco, Mario Commodo, Alberto Aloisio, Andrea D'Anna
Summary: A porous nanostructured film of flame-formed carbon nanoparticles has been produced, and its morphological and structural characteristics have been characterized. The film exhibits nonmetallic behavior, with a monotonic decrease in resistance as temperature increases. Electrical conduction is explained by charge carriers tunneling and percolation between carbon grains. The film shows a high absolute temperature coefficient of resistance (TCR) and is ideal for temperature sensing.
APPLIED SCIENCES-BASEL
(2022)
Article
Materials Science, Multidisciplinary
Elaiyappillai Elanthamilan, Arumugam Ganeshkumar, Sea-Fue Wang, Rajendran Rajaram, Selvakumar Thriambakeshwar, Mathiyazhagan Velusamy
Summary: In this article, a polydopamine/polyaniline decorated CNT composite (PDA/PANI@CNT) was synthesized for hybrid supercapacitor application. The structural and morphological features of the composite were characterized using various physicochemical techniques. The supercapacitive performance of the PDA/PANI@CNT electrode was evaluated and showed high specific capacitance and capacitance retention, indicating its potential as an electrode material for supercapacitors. Additionally, the biocidal potency of the composite was found to be better compared to PDA and PDA/PANI, suggesting the synergistic effect of CNT in enhancing the biological properties of PDA/PANI.
Article
Engineering, Electrical & Electronic
Jusin Lee, Min Jae Kim, Heewon Yang, Sunjin Kim, Seongoh Yeom, Gunwoo Ryu, Yoonsoo Shin, Onejae Sul, Jae Kyeong Jeong, Seung-Beck Lee
Summary: In this study, a stable and sensitive biochemical sensor based on amorphous indium-gallium-zinc-oxide (a-IGZO) thin-film transistors (TFTs) with a versatile extended-gate electrode was reported. The sensor demonstrated high sensitivity and specificity for protein detection, and could be potentially used for future multifunctional biomolecular sensing and analysis.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Shenghang Zhai, Jialin Shi, Peng Yu, Tie Yang, Yang Yang, Chanmin Su, Lianqing Liu
Summary: This study proposes a displacement sensing method with wide bandwidth and subnanometer resolution, which is not only insensitive to the material properties of the measured sample but it is also not in contact with the sample. The proposed method has a resolution of 0.21 nm, a range of 5 μm, and a bandwidth of about 515 Hz, making it suitable for micro-nano manufacturing, measurement, and motion control systems.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Engineering, Electrical & Electronic
G. K. Meenatchi, G. Velraj
Summary: The binary polymer nanocomposite (PTh/nNiO) was synthesized by chemical oxidation polymerization followed by mechanical mixing. The ternary polymer nanocomposites (PTh/cMWCNT/nNiO) were synthesized through an interface in-situ chemical oxidation polymerization method. The structure, morphology, elemental composition, and electrochemical performance of the synthesized samples were analyzed using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), energy-dispersive X-ray (EDX), and cyclic voltammetry (CV) measurements. The specific capacitance values obtained for PTh/nNiO and PTh/cMWCNT/nNiO composites are 365 F g(-1) and 419 F g(-1), respectively, and the ternary composite may be a promising candidate for supercapacitor application.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Chemistry, Physical
Dongju Lee, Seo Gyun Kim, Junghwan Kim, Namryeol Kim, Ki-Hyun Ryu, Dae-Yoon Kim, Nam Dong Kim, Jun Yeon Hwang, Yuanzhe Piao, Sangmin An, Dong Su Lee, Bon-Cheol Ku
Summary: By adding polyaniline (PANI) to carbon nanotube (CNT) fibers, the specific electrical conductivity and mechanical properties of the fibers are significantly improved. PANI enhances CNT orientation, decreases voids, and dopes the fibers, resulting in better electron flow. These findings provide insights into research on CNT fibers and their applications.
Article
Nanoscience & Nanotechnology
Bingjian Li, Shi Liu, Haicun Yang, Ran Wang, Xixi Xu, Yinjie Zhou, Yun Zhang, Dan Yang, Jinchun Li
Summary: The structure and surface morphology of electrode materials greatly affect the electrochemical performance in supercapacitors. In this study, a self-supporting, flexible layer of continuously reinforced carbon nanotube woven film (CNWF) was developed using the FCCVD technique. A series of flexible CNWF/PANI composite films were then produced by forming polyaniline (PANI) in the conductive network of CNWF through CVEP in various aqueous electrolytes. The CNWF/PANI1-15C composite electrode displayed a distinct coral-like PANI layer with a well-defined sharp nanoprotuberance structure, a 48% doping degree, and a quick reversible pseudocapacitive storage mechanism.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Chonghui Zhu, Xin Dong, Chuanyu Guo, Lihua Huo, Shan Gao, Zhikun Zheng, Xiaoli Cheng, Yingming Xu
Summary: This study has successfully developed an ammonia gas sensor with a wide detection range and low detection limit, which has been applied to monitor the freshness of food.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Physical
Xinjie Wang, Yi-Chi Wang, Biaolin Peng, Jianyu Deng, Ya Yang, Wenhong Sun, Zhonglin Wang
Summary: This paper investigates the influence of thickness on the performance of ferroelectric thin films and reveals that thicker films enhance spontaneous polarization but decrease dielectric permittivity, coercivity field, residual polarization, efficiency, and energy density, and gradually transition the positive electrocaloric effect into a negative regime. These changes can be attributed to the variation of in-plane tensile stresses with thickness, resulting in an increase in the tetragonal phase and a decrease in the rhombohedral phase structure.
Article
Materials Science, Multidisciplinary
Yun-An Lin, Yingjun Zhao, Long Wang, Yujin Park, Yi-Jui Yeh, Wei-Hung Chiang, Kenneth J. Loh
Summary: The study has developed a flexible, self-adhering, fabric-based wearable sensor for measuring skin strains and human motions, with stable sensing performance and effectiveness confirmed through stability and human subject tests.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Instruments & Instrumentation
Han-Joo Lee, Kenneth J. Loh
Summary: This study addresses the issue of heat loss in soft robotic systems by developing a system that can actively control heat loss to enhance both actuation and cooling. The use of double-walled structures and a thermoelectric device has shown improved performance in underwater operation, providing enhanced reversible actuation.
SMART MATERIALS AND STRUCTURES
(2021)
Article
Construction & Building Technology
Sumit Gupta, Yun-An Lin, Han-Joo Lee, Jeff Buscheck, Rongzong Wu, Jerome P. Lynch, Navneet Garg, Kenneth J. Loh
Summary: This study successfully validated the feasibility of large-scale application of self-sensing concrete in airport runway pavements and characterized spatially distributed damage using electrical resistance tomography (ERT). The results demonstrated that self-sensing concrete can accurately identify the severity, location, and patterns of cracks, as well as detect subsurface damage features before cracks become visible on the surface.
CEMENT & CONCRETE COMPOSITES
(2021)
Article
Engineering, Multidisciplinary
Morgan L. Funderburk, Yujin Park, Anton Netchaev, Kenneth J. Loh
Summary: This study validated the functionality of flow-excited scour sensors that can operate during extreme events. The piezo-rods were driven into soil to collect scour data and monitor their own structural response. By establishing a velocity-frequency relationship, the accuracy of length prediction of the piezo-rod was improved.
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Esteban Guerra-Bravo, Han-Joo Lee, Arturo Baltazar, Kenneth J. Loh
Summary: In this study, a mechanical vibrational analysis was conducted to control the atomization mass transfer rate of an ultrasonic atomizer. The effects of the micro-apertures shape and coupling of the metallic thin plate with a piezoelectric ring during vibration were numerically studied and compared with theoretical and experimental results. Good correlations between predicted and experimental data in terms of resonant frequencies and atomization rates were observed.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Biomedical
Yingjun Zhao Dubuc, Brittney Mazzone, Adam J. Yoder, Elizabeth Russell Esposito, Tae Hoon Kang, Kenneth J. Loh, Shawn Farrokhi
Summary: This review discusses the use of ankle brace systems for ankle sprains, evaluates the clinical benefits and limitations of different types of braces, and introduces new design concepts. It also explores the latest advancements in biomechanical simulation, multifunctional material fabrication, and wearable injury surveillance devices, and provides suggestions for future brace design.
EXPERT REVIEW OF MEDICAL DEVICES
(2022)
Article
Chemistry, Analytical
Sijia Li, Yening Shu, Yun-An Lin, Yingjun Zhao, Yi-Jui Yeh, Wei-Hung Chiang, Kenneth J. Loh
Summary: This study aims to design a strain-sensitive paint for structural monitoring. Carbon nanotubes (CNT) are dispersed in paint through high-speed shear mixing, and paint thinner is used to adjust the viscosity and nanomaterial concentration. The paint is spray-coated onto patterned substrates to form Sensing Meshes, and an electrical resistance tomography (ERT) measurement strategy and algorithm are used to reconstruct the conductivity distribution of the Sensing Meshes, enabling distributed strain monitoring.
Article
Instruments & Instrumentation
Morgan L. Funderburk, Jamie Tran, Michael D. Todd, Anton Netchaev, Kenneth J. Loh
Summary: Local scour is becoming a major cause of bridge failure worldwide, with the effects of climate change increasing the vulnerability of bridges. This study explores the use of ultrasonic time-domain reflectometry for continuous monitoring of soil interface in order to detect scour. The results show that the Lamb wave scour sensor is capable of reliably detecting soil interfaces at regular intervals.
SMART MATERIALS AND STRUCTURES
(2022)
Article
Materials Science, Multidisciplinary
Han-Joo Lee, Julie A. Mancini, Ishan Joshipura, Christopher M. Spadaccini, Kenneth J. Loh
Summary: Waveguides designed by shape optimization are more suitable for additive manufacturing, and can control the propagation of ultrasonic waves and be used for signal transmission or selective heating.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Chemistry, Analytical
Yun-An Lin, Yash Mhaskar, Amy Silder, Pinata H. Sessoms, John J. Fraser, Kenneth J. Loh
Summary: Insight into and measurements of muscle contraction during movement have led to the development and validation of a self-adhesive, elastic fabric, nanocomposite, skin-strain sensor for human movement monitoring. The sensor accurately measures skin-strains during functional movements, reflecting different degrees of muscle engagement.
Article
Chemistry, Analytical
Yening Shu, Saptarshi Mukherjee, Tammy Chang, Abigail Gilmore, Joseph W. Tringe, David M. Stobbe, Kenneth J. Loh
Summary: In this study, a current injection-based method called Electrical Resistance Tomography (ERT) is proposed for detecting damaged struts in conductive cellular lattice structures. An improved conductivity reconstruction algorithm is also introduced to overcome the limitations of conventional ERT and improve imaging and localization accuracy.
Article
Computer Science, Interdisciplinary Applications
Said Quqa, Luca Landi, Kenneth J. Loh
Summary: Sensing skins and electrical impedance tomography are cost-effective alternative methods for distributed sensing in civil structures, but their performance declines with aging of the sensing film. This paper proposes a novel approach using electrical resistance tomography and deep neural networks for crack identification in nanocomposite paint sprayed on structural components. The method incorporates crack annotations collected during visual inspections and utilizes transfer learning to improve crack identification performance. The results demonstrate that the proposed method outperforms traditional approaches for crack localization in complex damage patterns.
COMPUTER-AIDED CIVIL AND INFRASTRUCTURE ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Said Quqa, Sijia Li, Yening Shu, Luca Landi, Kenneth J. Loh
Summary: This paper explores the efficacy of supervised machine learning in solving the inverse electrical impedance tomography problem and reconstructing the conductivity distribution of a piezoresistive sensing film. A deep neural network is used to reconstruct the conductivity distribution within the painted area by using voltage measurements collected at sparse boundary locations. The paper presents a new approach to test the suitability of synthetic datasets built using a finite element model of the sensing film. Promising results are obtained compared to conventional methods.
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Morgan L. Funderburk, Kenneth J. Loh
Summary: This paper introduces a flow-driven technology for monitoring scour and improves the design of the sensor to enhance its sensitivity and frequency output. The research results show that accuracy of scour monitoring can be improved by introducing more frequency features and increasing the mass ratio.
IEEE SENSORS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Yun-An Lin, M. C. Schraefel, Wei-Hung Chiang, Kenneth J. Loh
Summary: This study presents the development of self-adhesive, fabric-based sensors for monitoring skin-strains and distributed muscular engagement during functional movements. The sensors show promise as a convenient and quantitative motion primitive assessment tool relevant for sports coaching and athletic skills development.
