MATERIALS CHEMISTRY AND PHYSICS
·
2021
·
IF 4.094
Chenhuinan Wei,Houhuang Zhou,Qiming Liu
PCN-222, a kind of zirconium-based porphyrinic metal-organic frameworks, was decorated on poly 3,4-ethylenedioxythiophene (PEDOT) films modified ITO electrode to fabricate a sensitive chloramphenicol (CAP) sensor. The designed PCN-222-CHIT/PEDOT/ITO sensor combined the CAP adsorption of PCN-222 and the good conductivity of PEDOT films. Cyclic voltammetry and differential pulse voltammetry techniques was examined to investigate the electrochemical performances of this sensor. Under the optimized experimental condition, the proposed sensor exhibited an ultralow detection limit of 0.0018 μM (S/N = 3). Good anti-interference ability and reproducibility were also displayed. Furthermore, the designed sensor realized the accurate detection of CAP in the real sample.
研究领域:
分析化学
·
环境科学
·
药物分析
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Yingze Lei,Keying Feng,Ao Zeng,Hongran Yang,Long Zhang,Zhiyong Liu,Zheng Chen
In this work, a method was developed to modulate the nanostructure of PEDOT films by constructing a ZnO interfacial modification layer on a substrate. Scanning electron microscopy (SEM) results revealed that the PEDOT film electrodeposited on the ZnO interfacial modification substrate had larger pores and a more three-dimensional structure. The PEDOT film showed a good electrochromic effect, and the transmittance changed from 51.04 % initially to 43.2 % after 8000 s cycles in the three-electrode system, which maintains an initial transmittance of 84.05 %, reflecting a great improvement in stability compared with that of pure PEDOT, which maintains 42.45 % of the original transmittance. In addition, after cycling for 8000 s, the response time of the film decays very little (1.8 s for coloring and 1.9 s for bleaching to 2 s for coloring and 2.1 s for bleaching), which is a great improvement over that of pure PEDOT (1.6 s for coloring and 1.8 s for bleaching to 15 s for coloring and 16.1 s for bleaching). This method is simple and inexpensive and provides a new option for modulating the morphology and structure of conductive polymers, which is conducive to the development of the commercialization direction.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2018
·Vol. 135
·期 40
·46729
·
IF 1.901
Haiyan Du,Xiaoxiao Liu,Zhe Ren,Huimin Yang,Yunlong Yu
Poly(3,4-ethylenedioxythiophene) (PEDOT) film has been prepared on conductive carbon paper (CP) substrates by unipolar pulse electrochemical deposition. The effects of different polymerization parameters, including pulse potential and width, deposition frequency, and duty cycle on the capacitance of PEDOT films, were studied by cyclic voltammetry in 0.5 M sulfuric acid solution. The PEDOT-coated CP electrode was characterized by scanning electron microscopy and Fourier transform infrared spectroscopy to confirm the three-dimensional porous structure and the presence of dopant ion conjugation during the electro-polymerization. The results of cyclic voltammetry and galvanostatic charge-discharge show that the PEDOT electrodes exhibit good specific capacitance of 151.31 F/g, rate performance and stability with a retention rate of 80.25% after 5000 cycles. The thin, lightweight electrode materials show considerable potential for low-cost, high-performance energy storage applications. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 46729.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
SYNTHETIC METALS
·
2020
·
IF 3.286
Wei Wang,Di Xu,Aibin Huang,Huihui Yuan,Junjie Xie,Xinyu Chen,Yunlong He,Tao Zhang,Hujiang Shen
PEDOT films were fabricated by vapor-phase polymerization (VPP) with different inhibitor contents in oxidant-containing solutions, and were characterized by X-ray diffraction, Raman spectroscopy, UV/vis transmittance spectra, atomic force microscopy, electrical conductivity and electrochromic measurements. The imidazole which serves as an inhibitor plays key roles on the polymerization reaction, and varying its content results in drastically different properties of the PEDOT films. In the imidazole/Fe(III) p -toluenesulfonate (Im/Fe) weight ratio range of 0∼0.25, the rate of polymerization can be significantly slowed down by increasing the Im/Fe ratio. The optimum Im/Fe ratio of 0.1 and polymerization time of 3 h results in PEDOT films with the highest conductivity on glass substrate (626 S/cm). Higher doping level is found in PEDOT films fabricated with the Im/Fe ratio above 0.1, causing low conductivity due to their loose morphology. The electrochromic properties of the films can be enhanced by prolonging the polymerization time to 3 h. It is found that the transmittance difference at 550 nm is above 10 % in PEDOT films fabricated with 3 h of polymerization. An electrochromic device is assembled and its coloring time is less than 3 s.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
NPG Asia Materials
·
2022
·Vol. 14
·期 1
·1-8
·
IF 10.761
Shi Wei,Yao Qin,Donghui Wang,Qu Sanyin,Chen Yanling,Lee Kyu Hyoung,Chen Lidong
Nonferric oxidant precursors have the unique advantage of directly polymerizing poly(3,4-ethylenedioxythiophene) (PEDOT)-inorganic composites. However, due to limited solubility and unmatched oxidation potentials, most oxidants only produce powders or porous materials. To obtain high-quality films with improved homogeneity and controllable particle sizes, the oxidants should be adaptable to high-standard PEDOT film fabrication techniques such as vapor phase polymerization (VPP). In this work, we discovered for the first time a nonferric metal salt suitable for the VPP process. With the addition of an Fe(III) salt to stabilize the reaction and adjust the oxidant ratio, micron-thick antibacterial S-PEDOT-Ag quantum dot (QD) composite films with tunable Ag wt% can be synthesized in one facile step. With a low Ag loading of ~0.2 wt%, the film exhibited an optimized power factor of 63.1 μW/mK 2 , which is among the highest values thus far reported for PEDOT-metal composites. Increase of the Ag(I) concentration in the precursor to a certain level may lead to minor decomposition of the polymer followed by the formation of Ag 2 S particles.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
NPG Asia Materials
·
2017
·Vol. 9
·期 7
·e405
·
IF 9.157
Shi Wei,Yao Qin,Qu Sanyin,Chen Hongyi,Zhang Tiansong,Chen Lidong
The inhibitor-dependent poly(3,4-ethylenedioxythiophene) (PEDOT) fabrication suffers major problems in the areas of controllability and film thickness. In this work, we found that anions play a key role in both the polymerization and the structure of PEDOT. As a precursor, anions greatly influence the reaction rate and oxidant solubility. In its role as a counter-ion, the anions also affect chain conductance and crystal growth. With these behaviors in mind, a self-inhibited polymerization approach using novel oxidants with appropriate anions was successfully developed to facilitate the fabrication of high quality in situ polymerized PEDOT films and solve the thickness limitation problem. Inhibitor-free heavy oxidative solutions with weakly basic anions enable the spin-coating of thick and homogeneous oxidant layers and also effectively inhibit both the crystallization of the oxidant and H + formation throughout the polymerization process. PEDOT: dodecylbenzenesulfonate (PEDOT:DBSA) exhibits the highest performance among all candidates due to its appropriate anion basicity and low steric effect. An extremely high doping level of 42.9% is achieved, and an electrical conductivity of ~1100 S cm −1 is successfully maintained for film thicknesses between 310 nm and 1.79 μm. In addition, the thermoelectric power factor (RT) for pristine films was improved to 77.2 μW mK −2 from 69.6 μW mK −2 by the dedoping treatment. This study provides a new approach for fabricating high performance PEDOT thick films using anion-based design.
研究领域:
材料科学
·
化学工程
·
电子材料
✓ 已验证
产品关联
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2018
·
IF 5.08
Zhouxiang Zhang,Jingkun Xu,Yangping Wen,Tongzhou Wang
A highly-sensitive electrochemical sensor based on single walled carbon nanotubes (SWCNTs) nanocomposite electro-catalyst supported molecularly imprinted poly(3,4-ethylenedioxythiophene) (PEDOT) film modified with two-dimensional layered tungsten sulfide (WS 2 ) nanosheet for the detection of vitamin B 2 (VB 2 ) was successfully developed. Molecularly imprinted WS 2 -PEDOT film was prepared by the electrochemical co -polymerization of functional monomer 3,4-ethylenedioxythiophene in the presence of template molecule VB 2 and WS 2 nanosheet. SWCNTs nanocomposite modified electrode was obtained by drop-coating SWCNTs dispersion containing graphene oxide (GO) onto GCE surface. WS 2 was used for improving the denseness and smoothness in the morphology and structure of PEDOT. GO was employed for enhancing the electro-catalytic capacity of SWCNTs and the interaction with template molecule via functional groups. The imprinted sensor was characterized, and its performance and parameters were investigated and optimized using linear sweep voltammetry. Under optimized conditions, the prepared imprinted sensor displayed a good linear response to VB 2 in wide concentration ranges from 0.002 to 0.9 μM with a low detection limit of 0.7 nM, and successfully applied to electrochemically detect VB 2 in drug samples with good reproducibility, repeatability and storage stability. The new design for the facile fabrication of mimic electrode will open up a new horizon in the development of highly-sensitive biomimic/imprinted sensors.
研究领域:
分析化学
·
生物医学工程
·
材料科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 41
·30045-30054
·
IF 3.9
Yang Zhang,Linze Li,Bingwei He
Poly(3,4-ethylenedioxythiophene) (PEDOT) has emerged as a promising coating for neural electrodes especially through convenient electrodeposition methods. To investigate the influences of solvents and EDOT monomer concentrations on the electrochemical performance and structural characteristics of PEDOT, both aqueous and acetonitrile solutions were employed with varying monomer concentrations during deposition. The prepared PEDOT films were examined for the surface morphology, electrochemical performance, and chemical structures. The results showed that an increase in EDOT concentration in either solvent led to PEDOT films with improved charge storage capacity and reduced impedance magnitude. At equivalent monomer concentrations, PEDOT films generated in acetonitrile exhibited a rougher surface texture and better electrochemical performance. Notably, the growth rate of charge storage capacity of PEDOT prepared in acetonitrile relative to the deposited charge density was 2.5 times that of PEDOT prepared in water. These findings could help to the optimization of PEDOT coating preparation to enhance electrode performance.
研究领域:
材料科学
·
电化学
·
神经接口
·
涂层与薄膜
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）