ACS Nano
·
2024
·
IF 15.8
Xiaojia Du,Leyi Yang,Xiaohu Shi,Chujie Ye,Yunfei Wang,Dekui Song,Wei Xiong,Xiaodan Gu,Chunming Lu,Nan Liu
To achieve high accuracy and effectiveness in sensing and modulating neural activity, efficient charge-transfer biointerfaces and a high spatiotemporal resolution are required. Ultrathin bioelectrode arrays exhibiting mechanical compliance with biological tissues offer such biointerfaces. However, their thinness often leads to a lack of mechano-electrical stability or sufficiently high electrochemical capacitance, thus deteriorating their overall performance. Here, we report ultrathin (∼115 nm) bioelectrode arrays that simultaneously enable ultraconformability, mechano-electrical stability and high electrochemical performance. These arrays show high opto-electrical conductivity (2060 S cm–1@88% transparency), mechanical stretchability (110% strain), and excellent electrochemical properties (24.5 mC cm–2 charge storage capacity and 3.5 times lower interfacial impedance than commercial electrodes). The improved mechano-electrical and electrochemical performance is attributed to the synergistic interactions within the poly(3,4-ethylenedioxythiophene) sulfonate (PEDOT:PSS)/graphene oxide (GO) interpenetrating network (PGIN), where π–π and hydrogen bonding interactions improve conductive pathways between PEDOT chains and enhance the charge-transfer mobility. This ultrathin bioelectrode is compatible with photolithography processing and provides spatiotemporally precise signal mapping capabilities for sensing and modulating neuromuscular activity. By capturing weak multichannel facial electromyography signals and applying machine learning algorithms, we achieve high accuracy in silent speech recognition. Moreover, the high transparency of the bioelectrode allows simultaneous recording of electroencephalography (EEG) and functional near-infrared spectroscopy (fNIRS) signals, facilitating dual-mode brain activity analysis with both high temporal and high spatial resolution.
研究领域:
生物医学工程
·
神经科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2022
·
IF 9.879
Yuang Zhang,Chuanxin Yang,Rongwen Lu,Shufen Zhang,Bingtao Tang
Thermoelectric technology can generate thermoelectric electromotive force under the condition of temperature difference, which have unlimited prospects in the emerging fields of sensing, wearable electronic devices, self-powered arbitrary doors, electronic skin. These application scenarios also put forward higher requirements for thermoelectric devices, excellent flexibility and self-supporting characteristics. Herein, a novel flexible self-supported thermoelectric device based on carbon nanotubes (CNTs) was designed and constructed with simple laminated construction of electrical series and thermal parallel. CNTs/PEDOT:PSS and polyethylenimine (PEI)-doped CNTs/polyvinylidene fluoride (PVDF) flexible self-supported films were used as p- and n-type films respectively. The obtained flexible self-supported thermoelectric device can generate a voltage of 3.31 mV under temperature difference of 35 K. The excellent light absorption and photothermal conversion of CNTs, together with the thermoelectric characteristics of CNTs and PEDOT:PSS, enables its promising applications in self-powered light intensity detection. Furthermore, its excellent flexibility and self-supporting characteristics give it outstanding durability.
研究领域:
热电技术
·
可穿戴电子
·
传感技术
·
能量转换
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DOI
高影响因子
Food Chemistry-X
·
2023
·
IF 6.1
Tianwen Xu,Li Yang,Xin Zhang,Guo Lu,Zhongchen Bai
A high-sensitivity electrochemical sensor was fabricated via in situ growth of Ag nanoparticles (AgNPs) on the surface of a polypyrrole@poly(3,4-ethylenedioxythiophene):polystyrene sulfonic acid (PPy@PEDOT:PSS) film for detecting sodium hydroxymethanesulfinate (SHF) molecules in milk and rice flour samples. The sensor fabrication process involved randomly decorating Ag seed points on the porous PPy@PEDOT:PSS film via a chemical reduction process using a AgNO 3 solution. Next, AgNPs were anchored on the PPy@PEDOT:PSS film surface using an electrochemical deposition method to prepare a sensor electrode. Under optimal conditions, the sensor exhibits a good linear relation within a range of 1–130 ng/mL for real milk and rice flour samples and its limit-of-detection values were up to 0.58 and 0.29 ng/mL, respectively. Additionally, Raman spectroscopy was used to identify the byproducts of the chemical reaction, such as formaldehyde. This AgNP/PPy@PEDOT:PSS film–based electrochemical sensor offers a simple and rapid method for detecting SHF molecules in food products.
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DOI
PubMed
高影响因子
Advanced Materials Interfaces
·
2020
·Vol. 7
·期 19
·2000754
·
IF 4.948
Wenzhong Fang,Pan Wang,Zitao Ni,Tao Sun,Chaoyu Xiang,Kun Yue,Rongfei Wang,Jie Yang,Yao Zhou,Chong Wang,Yu Yang
Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) hole injection layer plays an important role in planar Si/PEDOT:PSS heterojunction solar cells (HSCs). Herein, a MoO x mixed aqueous PEDOT:PSS cosolvent is developed and is applied into a Si/PEDOT:PSS solar cell preparation via a time-saving one-step spin-coating method. With an optimal concentration of MoO x dopants, the power conversion efficiency of the device exhibits from 10.26% up to 13.82% with all inherent photovoltaic parameters enhanced. The detailed characterization and analytical results indicate that an advanced electronic property is produced by MoO x dopants and interface optimization caused by synergistic effects from Mo 5+ and Mo 6+ species with PEDOT:PSS, which enhances its interface work function and promotes hole transportation capacity. The result paves a path for exploring efficient Si/PEDOT:PSS HSCs with suitable functional material and a simple solution-processable method.
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DOI
高影响因子
SOLAR ENERGY
·
2015
·
IF 3.469
Min Zheng,Jinghao Huo,Binguo Chen,Yongguang Tu,Jihuai Wu,Linhua Hu,Songyuan Dai
Binary alloy platinum–cobalt (Pt–Co) and platinum–nickel (Pt–Ni) hollow nanospheres are prepared by using a simple solution reaction method. Poly(3,4-ethylenedioxy thiophene):polystyrene sulfonate (PEDOT:PSS) as supported layer further enhance the binary platinum alloy electrochemical properties. The prepared binary platinum alloys are observed with hollow nanosphere structure. The cyclic voltammogram and electrochemical impedance spectroscopy measurement indicate that Pt–Co and Pt–Ni hollow nanospheres on PEDOT:PSS (PC-PP and PN-PP) electrodes have high conductivity and catalytic performance. Under simulated white solar light irradiation with intensity of 100 mW cm −2 (AM 1.5), the dye-sensitized solar cells (DSSCs) based on PCPP and PNPP counter electrodes achieve power conversion efficiencies of 9.02% and 8.23%, respectively, which are higher than the efficiency for the DSSC based on Pt counter electrode (7.96%).
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DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Gengzhe Shen,Lin Xu,Jing Kong,Chi Tat Kwok,Jingle Wang,Liuyan Zhang,Xiaohua Jie,Zhipeng Sun,De Ning,Zhengjian Chen
In this study, a new Al-LPM composite coating was in-situ deposited on the Al alloy via a facile one-pot hydrothermal method . Morphological and compositional characterizations revealed a tri-layered structure of the Al-LPM coating, namely, zinc aluminum-layered double hydroxide (ZnAl-LDH)/poly(3,4-ethylenedioxythiophene): poly(styrene sulfonate) (PEDOT:PSS)/MoS 2 . ZnAL-LDH was deposited closest to the surface of Al alloy , and the metallic ion-cross-linking of PEDOT:PSS makes the 3D coating more robust. The unique structure endows the coating with superior protective properties against both corrosion and wear. For anti-corrosion, the Al-LPM coating showed very high self-corrosion potential (-0.092 V) and small self-corrosion current density (46.0 μA cm −2 ) (vs. Al substrate with -1.157 V and 354.8 μA cm −2 , respectively), long-lasting high corrosion resistance (>57,000 Ω cm 2 ) during the immersion test, and the almost intact surface morphology and composition after 360 h corrosion. For anti-wear, the friction coefficient of the Al-LPM coating was determined to be < 0.2, which was much smaller than for the Al substrate (> 0.4). Also, there were no serious wear marks and grooves left after the dry-friction test.
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DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-13
·
IF 16.6
Xie Xinjian,Xu Zhonggang,Yu Xin,Jiang Hong,Li Hongjiao,Feng Wenqian
Conductive hydrogels require tunable mechanical properties, high conductivity and complicated 3D structures for advanced functionality in (bio)applications. Here, we report a straightforward strategy to construct 3D conductive hydrogels by programable printing of aqueous inks rich in poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) inside of oil. In this liquid-in-liquid printing method, assemblies of PEDOT:PSS colloidal particles originating from the aqueous phase and polydimethylsiloxane surfactants from the other form an elastic film at the liquid-liquid interface, allowing trapping of the hydrogel precursor inks in the designed 3D nonequilibrium shapes for subsequent gelation and/or chemical cross-linking. Conductivities up to 301 S m −1 are achieved for a low PEDOT:PSS content of 9 mg mL −1 in two interpenetrating hydrogel networks. The effortless printability enables us to tune the hydrogels’ components and mechanical properties, thus facilitating the use of these conductive hydrogels as electromicrofluidic devices and to customize near-field communication (NFC) implantable biochips in the future.
研究领域:
材料科学
·
生物医学工程
·
纳米技术
·
电气工程
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DOI
PubMed
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 33
·18690-18697
·
IF 2.936
Qian Liu,Zijie Xu,Wu Qiu,Chen Hou,Yanan Wang,Peijian Yao,Rui Yu,Wenxi Guo,Xiang Yang Liu
Ultraflexible electronics have received extensive attention due to their favorable properties, such as superior mechanical robustness, light weight and good compatibility with large-area roll-to-roll fabrication. Here we present a flexible sandwiched tungsten trioxide/silver nanotrough network/poly(3,4-ethylenedioxythiophene)–poly(styrene sulfonate) multi-layer transparent conducting electrode with prominent conductivity (sheet resistance as low as 1.08 Ω sq−1) and transparency (85%). In particular, the flexible transparent electrode exhibits excellent mechanical robustness upon bending and stretching. This hybrid electrode can be further adhered tightly to a layer of WO3 to form an electrochromic device, which simultaneously displays a rapid switching time (0.75 s/1.82 s for bleaching/coloring) and high cyclic performance (86% retention of the initial optical contrast after cycling for 30 000 s). In addition, our electrode can also be fabricated on various flexible substrates, such as polyethylene cling wrap, polydimethylsiloxane and Ecoflex, with sustained electrochromic properties after bending, twisting, stretching and even strong kneading. Our work provides new opportunities for the next generation of flexible and wearable electronics applied on various flexible substrates.
研究领域:
材料科学
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纳米科技
·
柔性电子学
·
功能材料
·
电化学
·
高分子材料
·
器件物理
✓ 已验证
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2017
·
IF 4.784
Liyan Yang,Yu Yan,Feilong Cai,Jinghai Li,Tao Wang
Conjugated polymer poly(9-vinylcarbazole) (PVK) has been explored as an efficient hole transport material (HTM) to replace poly(3,4-ethylenedio-xythiophene): poly(styrenesulfonate) (PEDOT:PSS) for the preparation of p-i-n type, inverted planar heterojunction perovskite solar cells. The PVK film can be facilely deposited by room-temperature solution-casting without any doping or post treatments. Using MAPbI 3 as the photoactive layer, a 15.8% stabilized power conversion efficiency was achieved in ITO/PVK/MAPbI 3 /PCBM/Ag devices, which is a significant improvement compared with 12.1% from devices using PEDOT:PSS as the HTM. The perovskite photoactive layer cast on PVK HTM has higher crystallinity and less PbI 2 residues, leading to a higher charge recombination resistance of the device. After a storage of 1000 h, the PCE of PVK- and PEDOT:PSS- based devices dropped to 82.5% and 56% respectively, and demonstrated that the PVK-based perovskite devices is more stable compared with the PEDOT:PSS-based devices.
研究领域:
材料科学
·
太阳能
·
有机电子
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Hangzhou Wang,Chenguang Kong,Jun Shi,Youcheng Huang,Shumin Jiang,Yu Zhou,Longbo Qi,Guohao Zhang,Kun Wu,Yi Fu
Flexible strain sensors are of great significance in achieving high sensitivity monitoring, expanding the application scope of intelligent devices, and promoting the innovation of human–computer interaction technology. However, variations in environmental temperature frequently lead to signal drift in strain sensing, compromising the stability and accuracy of the measurements. This study exploits the negative temperature coefficient of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonic acid) (PEDOT:PSS) in its temperature response. Through constructing the network cross-linking structure, introducing hydrogen bonding, and modulating metal coordination, the thermal expansion mismatch between PEDOT:PSS and the matrix was effectively mitigated. By balancing the antagonistic effects of the “negative temperature effect” (NTC) and “thermal expansion effect” (PTC), the insensitive characteristic of the sensing material to temperature changes was achieved. The temperature coefficient of resistance (TCR) of the sample decreased from 40.29 to 0.45%/K. Meanwhile, the modified samples exhibit superior strain-sensing performance, characterized by a broad strain range of 0–50%, excellent linearity, and stable signal output, which is attributed to their self-adhesive property. These samples demonstrate exceptional stability and durability, maintaining a consistent strain-sensing signal after undergoing over 2000 stretching–recovery cycles. Consequently, this study successfully developed a temperature-insensitive flexible strain-sensing material. The sensor’s temperature insensitivity and its ability to stably monitor strain emphasize its significant potential for applications in variable temperature environments, particularly in human motion monitoring and health monitoring.
研究领域:
生物医学工程
·
柔性电子学
·
传感材料
·
健康监测
·
人机交互
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产品关联
DOI
PubMed
高影响因子
DESALINATION
·
2025
·
IF 9.8
Luxin Li,Jiansong Luo,Wenxi Liao,Jiajia Deng,Ting Wang,Yanyan Huang,Jianming Deng,Huang Zhou,Yuxin Yang
Water and energy are indispensable pillars of human civilization, yet both face mounting challenges due to population growth, climate change, and environmental degradation. Enhancing the efficiency of water and energy systems and reducing their environmental impact are thus critical to achieving a low-carbon, water-secure future. This study introduces a novel, scalable and adjustable water-electricity coproduction fabric (PP-WECF) developed via an accessible shuttle-flying weaving technique. The PP-WECF integrates PEDOT:PSS fibers, which serve as a transpiration-driven electrokinetic power generator, with hydrophilic fibers that channel water, and PANI fibers that enable solar-driven steam generation. The integration of PEDOT:PSS fibers and PANI fibers for PP-WECF facilitates sustainable operation and synergistic energy utilization. Furthermore, our results demonstrate that solar illumination of 1 kW·m −2 , the PP-WECF shows an efficient, self-operating, and sustainable output of 1.1 V, 116.0 μA, and 1.6 kg·m −2 ·h −1 in 3.5 wt% NaCl solution. The scalable, prolonged, and adaptable outdoor operation throughout the daytime ensures the clean production of electricity and freshwater.
研究领域:
能源系统
·
海水淡化
·
可持续技术
·
材料科学
·
动电学
·
太阳能
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2022
·
IF 5.546
Daolian Zhu,Meng Miao,Xinjing Du,Yuanyuan Peng,Zhen Wang,Shujie Liu,Jinfeng Xing
Hydrogel-based soft materials have great potential in flexible sensors and wearable devices. Herein, a novel covalent double network (C-DN) conductive hydrogel with excellent mechanical properties and great sensing performances was facilely prepared through photopolymerization under green light emitting diode (LED) irradiation. Two types of crosslinking agents were used to optimize the construction of C-DN poly(2-acrylamido-2-methylpropanesulfonic acid sodium salt) /polyacrylamide (P(AMPS-Na)/PAM) hydrogels, which were further reinforced by poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS). The effect of monomer ratio on the mechanical properties of hydrogels was investigated. Notably, the asymmetric double network from hybrid long/short chain crosslinkers and physical interactions from PEDOT:PSS enabled hydrogels to show satisfactory stretchability of 1228%, high tensile strength of 1.502 MPa, strong toughness of 7.209 MJ m −3 , and good fatigue resistance. Moreover, the synergistic transport of well-dispersed PEDOT:PSS and Na + provided a rich conductive network for hydrogels. The P(AMPS-Na)/PAM/PEDOT:PSS hydrogels exhibited stable and reproducible resistance responses under different strains, showing excellent strain sensitivity (Gauge factor (GF) = 1.30 and 2.72 at 0–50% and 50%-300% strains, respectively). These conductive hydrogels are promising in wearable sensors and human–computer interfaces.
研究领域:
材料科学
·
高分子化学
·
传感器与执行器
·
可穿戴技术
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DOI
高影响因子
危险品化学品经营许可证（带存储）