JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
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2024
·Vol. 39
·期 4
·937-944
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IF 1.3
Tan Yan,Hao Panpan,He Yang,Zhu Rufeng,Wang Yuedan
Poly(3, 4-ethylenedioxyethiophene)-polystyrene sulfonic acid (PEDOT:PSS)/polyallyl dimethyl ammonium chloride modified reduced graphene oxide (PDDA-rGO) was layer by layer self-assembled on the cotton fiber. The surface morphology and electric property was investigated. The results confirmed the dense membrane of PEDOT: PSS and the lamellar structure of PDDA-rGO on the fibers. It has excellent electrical conductivity and mechanical properties. The fiber based electrochemical transistor (FECTs) prepared by the composite conductive fiber has a maximum output current of 8.7 mA, a transconductance peak of 10 mS, an on time of 1.37 s, an off time of 1.6 s and excellent switching stability. Most importantly, the devices by layer by layer self-assembly technology opens a path for the true integration of organic electronics with traditional textile technologies and materials, laying the foundation for their later widespread application.
研究领域:
材料科学
·
电子工程
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高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Xiaolin Jia,Miaomiao Li,Zhiguang Liu,Yujie Han,Hua-Zhong Yu,Lifang Fan,Yujing Guo
This work presents an on-off ratiometric electrochemical quantitation study of methyl parathion (MP), one of the most popularly used organophosphorus pesticides, based on electrode modification with a newly developed nanocomposite, i.e., reduced graphene oxide (rGO) functionalized with poly(diallyldimethylammonium chloride) (PDDA) and nickel hexacyanoferrate (NiHCF). It was shown that MP strongly adsorbs on the modified electrodes and produces a distinct reduction signal (-NO 2 ), which increases proportionally with its concentration; meanwhile, the intrinsic reduction signal (Fe(III)/(II)) from the nanocomposite (NiHCF/PDDA@rGO) decreases due to the inhibited electron-transfer process upon MP binding. Indeed, plotting the ratiometric signal (the ratio of decreased Fe(III)/(II) current and the increased MP current) as a function of the analyte (MP) concentration produces a linear calibration curve in the range of 0.05 μM to 10 μM (R 2 = 0.9987), with a limit of detection (LOD) of 16 nM. The method was further validated in real water samples, showing recoveries of 96.2–102% with relative standard deviations below 3.3%, which are comparable with standard HPLC results.
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IONICS
·
2016
·Vol. 22
·期 11
·2225-2233
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IF 2.119
Lu Juanjuan,Liu Yuelin,Liu Xinhe,Lu Xiaoquan,Liu Xiuhui
In this article, we constructed an electrochemical sensor for highly sensitive determination of β-nicotinamide adenine dinucleotide (NADH) using the poly(diallyldimethylammonium chloride)-functionalized reduced graphene oxide nanocomposite modified electrode (PDDA-rGO/GCE). The nanocomposite was characterized by transmission electron microscopy, Fourier transform-infrared spectrometry, ultraviolet-visible absorption spectrometry, cyclic voltammetry, and electrochemical impedance spectroscopy. The experimental results demonstrated that the fabricated sensor exhibited excellent electrocatalytic activity on the oxidation of NADH with a decreased about 200 mV in overpotential and 5.0-fold increment in the oxidation peak current compared to a bare GCE. Applying cyclic voltammetry, a wide linear range from 1.0 × 10 −7 to 2.9 × 10 −3 M with low limit of detection (LOD) of 3.4 × 10 −8 M and high sensitivity of 463.3 μA mM −1 cm −2 were obtained, which was superior to other NADH electrochemical sensors reported previously. Furthermore, the fabricated NADH sensor possessed excellent selectivity, reproducibility, and stability. The oxidation mechanism of NADH at the PDDA-rGO/GCE was also discussed in detail.
A simple NADH sensing platform based on PDDA-rGO composite is constructed, which exhibits an ultra-low detection limit ( 3.4×10-8 M) towards the oxidation of NADH, and the electrochemical reaction mechanism of NADH is discussed in detail.
研究领域:
生物电化学
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生物传感器
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纳米生物技术
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分子诊断
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转化医学
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电分析化学
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高影响因子
International Journal of Electrochemical Science
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2023
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IF 1.5
Min Zhang,Dongmei Fu
A gas-liquid interface approach was developed for the synthesis of ternary Pd-Au-P composites, which were supported on poly(diallyldimethylammonium chloride)-functionalized reduced graphene oxide (PDDA/RGO). The as-synthesized composites were characterized by transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The Pd-Au-P-PDDA/RGO composites as an electrochemical dopamine (DA) sensor showed superior electrocatalytic activity and stability toward DA oxidation as compared with Pd- Au-PDDA/RGO and Pd-Au-P/RGO. The enhanced electrochemical performance could be attributed to the effect of electronic structure and long-range disorder and short-range structure due to the doping of P element. By studying the kinetics of DA oxidation, electrochemical DA oxidation was proven to be irreversible and follow Laviron Equation. Using differential pulse voltammetry (DPV), the Pd-Au- P/PDDA/RGO sensor had low detection limit of 0.7 ^M, wide linear range of 3.5-125 ^M and relatively high sensitivity (0.2858 μA/μM), which was suitable for the detection of biological and environmental samples.
研究领域:
生物医学工程
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材料科学
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分析化学
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2018
·
IF 5.667
Shuo Li,Yinghao Duan,Sheng Lei,Jiantong Qiao,Gaiping Li,Baoxian Ye
In this work, a brand new nanocomplex (denoted as [email protected] ) is elaborately designed and successfully synthesized meaning the in-situ assembly of porous-morphology Zn-based MOFs (MOF-5) onto the as-prepared PDDA-rGO-Ni (PGN for short) nanocomposites. When this nanocomplex contributes to construct the electrochemical sensor ( [email protected] /GCE), it presents a highly-sensitive response towards echinacoside, and the first measurement for echinacoside by electrochemistry accordingly evolves forward. The crystallization processes are investigated by FT-IR instrument and XRD analysis, as well as micro-morphology of modified materials is visible upon SEM and TEM. Adorably, a novel ratiometric sensor was progressively fabricated by encapsulating methylene blue (MB) molecules into cubic MOF-5 framewoks (MB encased [email protected] /GCE), and apart from assisting in establishing the analysis method with extreme accuracy and favorable practicality, it dose devote a wider linear scale and a lower detection limit than that [email protected] /GCE has given out. Drawn from the developed calibration curve using differential pulse voltammetry (DPV) technique, the peak intensity ratio (I Ech /I MB ) varies linearly with increased echinacoside concentration in the range of 3.0 × 10 −8 – 1.0 × 10 −6 mol L −1 with limit of detection (LOD) reaching 1.0 × 10 −8 mol L −1 (S/N = 3). Additionally, the proposed assay method has been employed to detect echinacoside in real sample sliced cistanche with satisfactory results.
研究领域:
分析化学
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电化学
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纳米材料
·
药物分析
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高影响因子
危险品化学品经营许可证（带存储）