Article
Chemistry, Multidisciplinary
Lan Dong, Chengpeng Bao, Shiqian Hu, Yuanyuan Wang, Zihua Wu, Huaqing Xie, Xiangfan Xu
Summary: In this study, we characterized the thermal conduction of PEDOT:PSS nanofibers and found that the Lorenz number L increased significantly in the low-temperature region. This trend is believed to be due to the bipolar contribution of conducting polymers with low electrical conductivity and the increasing contribution of electronic component to thermal conductivity in low-temperature regions.
Article
Materials Science, Multidisciplinary
Yuanmin Zhang, Yuqi Chen, Sonia Contera, Richard G. Compton
Summary: Poly(3,4-ethylenedioxythiophene) (PEDOT), a conducting polymer, is used to coat metal neural electrodes for improved performance. However, PEDOT-coated electrodes often suffer from mechanical instability. This study systematically evaluates the electropolymerization and surface morphology of PEDOT:PSS, optimizing the deposition for recording neural electrodes. The modified electrodes demonstrate good electrochemical performance without triggering redox reactions.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Kuntima Pattanarat, Nattasamon Petchsang, Tanakorn Osotchan, I. -Ming Tang, Yong-Hoon Kim, Rawat Jaisutti
Summary: In this study, textile-based gas sensors composed of polyaniline (PANi)-decorated poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate) (PEDOT/PSS) coated on cotton yarn were developed for detecting ammonia. The PANi/PEDOT/PSS sensor showed high conductivity, good sensitivity, and excellent stability, outperforming the PEDOT/PSS and PANi/HCl sensors. The sensor demonstrated humidity independence and excellent durability under stretching and washing conditions.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
In Yea Kim, Dong Won Chun, Sang-Il Kim, Jae-Hong Lim
Summary: The study demonstrates that by controlling the interfacial band structure engineering, a high power factor can be achieved in Se nanowire array embedded in PEDOT:PSS, showing potential for the synthesis of high-performance organic/inorganic hybrid thermoelectric materials. By exploring interface engineering, rational design of high-performance thermoelectric composites can be facilitated.
FRONTIERS IN CHEMISTRY
(2022)
Article
Chemistry, Physical
Sally Mabrouk, Ashim Gurung, Behzad Bahrami, Abiral Baniya, Raja Sekhar Bobba, Fan Wu, Rajesh Pathak, Quinn Qiao
Summary: This study successfully synthesized PANI films through an electrochemical method to replace PEDOT:PSS in PSCs, resulting in an efficiency improvement.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Ahmed Shakir Al-Hiti, M. Yasin, S. W. Harun
Summary: In this article, a Q-switched laser operating at a 1.5 μm region utilizing PEDOT: PSS spin-coated onto PVA as a SA was proposed and demonstrated. The laser achieved a stable Q-switched pulse train at 1563.3 nm with various parameters recorded, showcasing the potential of PEDOT: PSS/PVA as a SA for Q-switched lasers in the 1.5 μm region.
OPTICAL FIBER TECHNOLOGY
(2022)
Article
Engineering, Chemical
Keziban Huner
Summary: Conductive polymers (P3ANA and PEDOT:PSS) were mixed with biocompatible and biodegradable PCL to prepare electrospun nanofibers. The nanofibers containing 10% P3ANA showed the highest antioxidant activity and were non-toxic to cells. The nanofiber with the highest amount of P3ANA also had a higher anodic current value than other P3ANA nanofibers.
POLYMER ENGINEERING AND SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Omita Nanda, Nidhi Gupta, Ashok M. Biradar, Kanchan Saxena
Summary: This study investigates the effect of humidity on the electrical properties of different conductivity grades of PEDOT:PSS polymers and their nanocomposites with SWCNT. It was found that the resistance of pristine low and high conductivity grade PEDOT:PSS films show opposite trends with respect to humidity, while this trend reverses in their nanocomposites containing CT-SWCNT. This research provides valuable information for researchers in the field of polymer nanocomposite based devices and applications.
Article
Chemistry, Physical
Yen-Ting Lin, Chia-Yu Lee, Chih-Yao Wu, Jhih-Min Lin, Tai-Chou Lee, Shih-Huang Tung, Cheng-Liang Liu
Summary: In this study, poly (3,4-ethylenedioxythiophene):poly (styrenesulfonate) (PEDOT:PSS) films with improved thermoelectric properties were fabricated using spray coating and a sequential two-step post-treatment process. The electrical conductivity of the PEDOT-PSS film was greatly increased up to 1752.1 S cm-1 through EG treatment, while the use of 0.05 M MAI in the second step provided a high power factor of 122.3 mu Wm-1 K-2. The fabrication approach developed in this study provides a paradigm for producing polymer thermoelectric materials with great potential for application in wearable thermoelectric devices.
JOURNAL OF POWER SOURCES
(2023)
Article
Materials Science, Multidisciplinary
Maria Elena Sanchez Vergara, Rafael Imanol Zubillaga Serrano, Leon Hamui, Jose Miguel Galvan Hidalgo, Ismael Cosme, Elizabeth Gomez
Summary: Enhanced transparency, optical, and electrical behavior of hybrid films for organic solar cells were achieved by introducing graphene and an electron transport layer BPhen, resulting in improved current density values and stability under illuminated conditions. However, the electrical behavior degraded over time due to device films and interface degradation after 4 hours.
FRONTIERS IN MATERIALS
(2022)
Article
Polymer Science
Yihan Wang, Siqi Wu, Qinjian Yin, Bo Jiang, Site Mo
Summary: The different impacts of graphene and multi-walled carbon nanotube on polypyrrole have been investigated. Graphene interacts stronger with PEDOT chains, and when at the appropriate ratio, it can exhibit excellent thermoelectric performance.
Article
Energy & Fuels
Maryam Habibi, Edris Faizabadi, Gholamhossein Riazi, Rasul Ajeian
Summary: Organic-based photosystem I (PSI) protein complex bio-solar cells have the potential to be low-cost and environmentally friendly photovoltaic devices. However, their power conversion efficiency is currently low. This study proposes a method to improve efficiency by applying a pulsed electric field to align PSI dipoles. Numerical simulations show that optimizing the physical parameters of the hole transport layer can significantly enhance performance.
Article
Polymer Science
Ana M. Diez-Pascual
Summary: PEDOT:PSS/SnO2 nanocomposites prepared by a simple, low-cost, environmentally friendly method show improved thermal stability, electrical conductivity, and Seebeck coefficient compared to neat PEDOT:PSS, while maintaining almost unchanged optical transparency. These sustainable nanocomposites have potential for applications in energy storage, flexible electronics, and thermoelectric devices.
Article
Materials Science, Composites
Xin Jiang, Yihu Song, Wanjie Wang, Qiang Zheng
Summary: This study introduces silica as a secondary filler in PEDOT:PSS/NR nanocomposites films to improve stability of electrical properties and decrease the change of Seebeck coefficient after deformation, offering a simple strategy for preparing stretchable conductors with enhanced stability.
COMPOSITES COMMUNICATIONS
(2022)
Review
Nanoscience & Nanotechnology
Xiaojia Du, Leyi Yang, Nan Liu
Summary: Sensing bioelectrical signals is important for understanding human disease, and reliable bioelectronic interfaces are essential for high-quality signals. Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) has unique electrochemical and mixed conductivity properties, making it an ideal material for the skin/tissue-electronic interface. However, improvements are needed for practical use. This article summarizes the development of PEDOT:PSS-based electrodes and their recent advances in sensing bioelectrical signals, including the requirements for bioelectrodes and achievements in improving conductivity and stability. PEDOT:PSS-based electrodes successfully record bioelectrical signals such as EMG, ECG, EOG, and EEG. The article concludes with a brief summary and discussions on opportunities and challenges.
Article
Nanoscience & Nanotechnology
Ching-Kang Shen, Rajneesh Chaurasiya, Kuan-Ting Chen, Jen-Sue Chen
Summary: In this study, a simple and cost-effective ferroelectric-coupled zinc-tin oxide thin-film transistor was reported for artificial synaptic devices. The device demonstrated superior artificial synapse responses and successfully emulated important features of synaptic behavior, highlighting its potential as a hardware candidate for neuromorphic computing.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Rajneesh Chaurasiya, Pei-En Lin, Cheng-Han Lyu, Kuan-Ting Chen, Li-Chung Shih, Jen-Sue Chen
Summary: This study provides comprehensive insights into the role of neutral and charged oxygen vacancies in conduction filament formation and rupture. By using atomistic simulations based on density functional theory, the stability of oxygen vacancies, changes in electrical conductivity, and diffusion properties were investigated. This research sheds light on the filamentary type resistive switching observed in experimentally fabricated devices and offers a platform for exploring the switching mechanism of other oxide materials used in memristor devices.
Article
Chemistry, Physical
Anupriya Singh, Rajneesh Chaurasiya, Amarnath Bheemaraju, Jen-Sue Chen, Soumitra Satapathi
Summary: In this study, we synthesized Sb-based single crystals of Cs2AgSbCl6 with a low bandgap of approximately 1.82 eV and investigated the effect of strain on their optical properties. Interestingly, the polycrystalline ground powder and heated single crystals showed a larger bandgap of about 2.55 eV. The reduction in bandgap is attributed to the presence of strain in the single crystals, which was confirmed by X-ray diffraction and Raman spectroscopy and supported by density functional theory calculations. Strain engineering for bandgap reduction could be crucial for the development of environmentally friendly solar cells with low bandgaps.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Physics, Condensed Matter
Sumit Kumar, Rajneesh Chaurasiya, Mustaque A. Khan, Gang Meng, Jen-Sue Chen, Mahesh Kumar
Summary: We developed a highly selective and sensitive H2S sensor based on CuO thin film, which was enhanced by decorating with rGO nanosheets. The CuO thin film was deposited using Chemical Vapor Deposition, and the sensing response was improved by forming heterojunctions with rGO. The developed sensor showed high selectivity towards H2S gas and the improvement in sensing response was attributed to increased hole concentration in CuO and increased absorption of H2S molecules.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2023)
Article
Nanoscience & Nanotechnology
Jia-He Yang, Shi-Cheng Mao, Kuan-Ting Chen, Jen-Sue Chen
Summary: This paper introduces a threshold-switching memristor for artificial neural networks, which mimics multiple biological functions of neurons and overcomes the issues in conventional memristors.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Yun-Huei Zeng, Fang-Jui Chu, Li-Chung Shih, Yu-Chieh Chen, Jen-Sue Chen
Summary: The integration and cooperation of the retina, neurons, and synapses in the visual systems allow humans to sense and process visual information with low power consumption. An artificial sensory nerve with optical sensing and neural coding has been developed to mimic the human visual system. By applying two consecutive light stimuli to a phototransistor, the positive and negative correlations between paired-pulse ratio (PPR) and light pulse time interval were consistently revealed. The phototransistor contains a heterostructured channel layer composed of zinc-oxide nanoparticles interconnected with a solution-processed zinc-tin oxide film.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Kuan-Ting Chen, Li-Chung Shih, Shi-Cheng Mao, Jen-Sue Chen
Summary: Neuromorphic computing is a promising approach to reduce latency and energy consumption in massive data processing. We have developed an ITO/TaOx-based synaptic capacitor and transistor that can adjust synaptic weights. The capacitor showed better performance in handwritten digit recognition and consumed less energy compared to the transistor. These findings demonstrate the potential of the ITO/TaOx-based capacitor in capacitive neural networks.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Electrical & Electronic
I-Wen Wang, Li-Chung Shih, Jeng-Ting Li, Jen-Sue Chen
Summary: Compared to conventional voltage-gated channels, the photo-induced gating effect allows for controlling carrier concentration and remote operation in thin-film transistors (TFTs). The photo-gated zinc-tin oxide TFT (ZTO TFT) demonstrates the feasibility of achieving various output characteristics at V-G = 0 V. Current saturation in the I-D-V-D curves of the photo-gated ZTO TFT confirms the presence of a light-induced pinch-off region, indicating a positive pseudogate voltage in the channel under lighting. The photogating mechanism and efficiency are discussed in terms of the photoionization of neutral oxygen vacancies to positively charged oxygen vacancies.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Article
Materials Science, Multidisciplinary
Yen-Cheng Mi, Ching-Hsiang Yang, Li-Chung Shih, Jen-Sue Chen
Summary: In this study, an all-optical-controlled IGZO/ZrOx phototransistor is demonstrated to emulate synaptic functions via both positive and negative photoresponse. With the coupling effect of photogenerated electrons and the charged M-M++ defect scattering, the IGZO/ZrOx photosynaptic transistor not only shows broadband photosensing performance but also emulates the excitatory/inhibitory contrasting synaptic functions. The optical information conveyed by the all-optical-controlled IGZO/ZrOx photosynaptic transistor is effective for streaming sensor processing in biologically inspired computer vision application.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Physical
Hao-Chun Chang, Chao-Lung Chiang, Yan-Gu Lin, Wei-Che Tseng, Chao-Cheng Kaun, Yen-Hsun Su, Jen-Sue Chen, Jih-Jen Wu
Summary: The electronic structure of TiO2 nanorod array is modulated by depositing Pt nanoparticles with different configurations, affecting the selectivity of photocatalytic CO2 conversion. In-situ XANES measurements suggest that the active sites for the photocatalytic reaction are located on the TiO2 nanorod surface, not on the Pt nanoparticles. The t2g/eg and dz2/dx2_y2 ratios of TiO2 are correlated with the selectivity of H2 and CH4 for photocatalytic CO2 conversion and the adsorption energies of H and CO on TiO2 surface, indicating the crucial role of Pt nanoparticles as promoters.
APPLIED SURFACE SCIENCE
(2023)
Review
Materials Science, Multidisciplinary
Rajneesh Chaurasiya, Li-Chung Shih, Kuan-Ting Chen, Jen-Sue Chen
Summary: This review paper discusses the different types of higher-order memristors, including their mechanism and applications. Higher-order memristors exhibit dynamic complexity and adaptive properties through multiple internal state variables, mimicking the neuronal and synaptic properties of biological systems, and show potential for processing temporal information and performing analogue computing.
Article
Materials Science, Multidisciplinary
Li-Chung Shih, Kuan-Ting Chen, Shi-Cheng Mao, Ya-Chi Huang, Fang-Jui Chu, Tzu-Hsiang Liu, Wen-Hui Cheng, Jen-Sue Chen
Summary: In the field of cognitive neuroscience, the coupling of homosynaptic activation and heterosynaptic modulation is crucial for enhancing memory consolidation. By integrating optosynapses into neuromorphic visual systems, the replication of human visual mechanisms can lead to reduced latency, power consumption, and improved cognitive performance. This study demonstrates a zinc-tin oxide (ZTO) and gold nanoparticle (NP) heterostructure optosynapse, enabling super-additive interaction between homosynaptic and heterosynaptic plasticity and enhancing learning and memory performance. Additionally, the optosynapse also has the capability to perform logic operations, making it suitable for integration into neuromorphic computing architectures and advancing machine vision.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Fang-Jui Chu, Yu-Chieh Chen, Li-Chung Shih, Shi-Cheng Mao, Jen-Sue Chen
Summary: In this study, a dual-gate ferroelectric polymer P(VDF-TrFE)-coupled IGZO thin-film transistor is proposed, which exhibits both short- and long-term memory functionalities and can be utilized in the reservoir and readout layers of neuromorphic computers. This technology holds significant potential for next-generation hybrid intelligent applications.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Li-Chung Shih, Ya-Shan Lin, Kuan-Ting Chen, Jih-Jen Wu, Jen-Sue Chen
Summary: The development of neuromorphic computation has made significant progress in time-series forecasting, non-structural visual data, and pattern recognition. In this study, a light-sensitive zinc-tin oxide (ZTO) phototransistor with extensive conductance modulation was demonstrated in response to an electrical-optical hybrid signal. The synergistic current amplification effect was observed when the gate voltage spike and 405 nm light spike were overlapped, and it was even more significant when the phototransistor was embedded with gold nanoparticles (ZTO/Au NP phototransistor). The potential for data processing in sensor networks was shown due to the electrical-optical synergistic effect and manifold temporal response of both phototransistors.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Li-Chung Shih, Sheng-Rong Lin, Rajneesh Chaurasiya, Po-Yen Kung, Song-Syun Jhang, Bernard Haochih Liu, Yen-Hsun Su, Jen-Sue Chen
Summary: This article explores a novel photomemory based on an oxide transistor with a channel layer that incorporates gold nanoparticles. The photomemory exhibits visible light sensing and data storage capabilities, with high responsiveness, multilevel data storage, and excellent retention.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
