MICROCHIMICA ACTA
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2022
·Vol. 189
·期 7
·1-10
·
IF 6.408
Wang Meng,Dong Hui,Zhang Yintang,Zhu Xu,Gu Mengjiao,Zhu Qianqian,Miao Xing,Zhou Yanli,Xu Maotian
As a vital gaseous signal molecule involved in various physiological and pathological processes, nitric oxide (NO) has attracted extensive attention in the last few decades. In this work, a copper and cobalt element-doped, biphenyl-(3, 4′, 5)-tricarboxylic acid (H 3 PTC)–synthesized metal organic framework (CuCo-PTC MOF) composite with catalytic ability was synthesized by solvothermal method. The material can catalyse the oxidation of o-phenylenediamine (OPD) groups by hydrogen peroxide (H 2 O 2 ) to form fluorophores (OPDox) with yellow fluorescence emission and greatly improves its reaction rate. In the presence of NO, OPD will react with NO to produce N-(2-hydrazinophenyl) methylamine, and the group will not react with H 2 O 2 . Therefore, the concentration of NO can be measured indirectly by comparing the changes of fluorescence intensity in the presence and absence of NO. As the concentration of NO changes, the change of solution colour (from bright yellow to colourless) can also be observed under a 365-nm UV lamp. Furthermore, the method represents high selectivity for NO and shows a fast (within 5 min) and specific fluorescence response toward NO with a linear range from 0.25 to 2.0 μM; the strategy has a limit of detection (LOD) of 0.15 μM. More importantly, the probe was successfully used to detect NO in cell lysate. The recovery was between 98.5 and 103.6%, and the relative standard deviation was between 0.4 and 1.8%. The endogenous NO in cells was successfully detected under the stimulation of L-arginine, which proved the possibility of the probe in real-time and rapid sensing in actual samples and cells. The results indicate that this sensing strategy has the potential to detect NO in the internal environment. Graphical abstract Schematic of fluorescence detection of NO
研究领域:
生物化学
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分析化学
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DOI
PubMed
高影响因子
Russian Journal of Physical Chemistry A
·
2025
·Vol. 99
·期 2
·327-337
·
IF 0.8
Liping Zhao,Zhao Ye,Zhao Lihe,Du Juan,Deng Xia,Wu Xueyan,Subinuer,Liu Gang,Yao Cen,Shen Lu,Xie Haiming
An internal resistance heating method was proposed to control the operating temperature of Li-ion batteries to address rapid performance degradation under low temperature conditions. Main research content: (a) Preparation and process optimization of PTC (positive temperature coefficient) effects materials: Using micrometer nickel powder as the conductive material and polypropylene/polyvinylidene fluoride (PP/PVDF) as the polymer matrix. The polymer matrix was mixed with the conductive material using high-temperature melting method. The PTC materials with a transition temperature below 40°C were prepared through controlling the preparation process repeatedly and meticulously, and the optimal preparation process was determined. (b) Performance testing and analysis of PTC materials: The thermal analysis, volume change analysis, structure and micro-structure analysis were conducted through resistivity temperature curve, tensile performance, SEM and thermal expansion testing, respectively. The influence of conductive material content, heat treatment temperature, heat treatment time on the performance of PTC materials was systematically studied. (c) “Self heating Battery” assembly and performance study: A self heating Li-ion battery was assembled and its electrochemical performance was tested systematically. The results showed that the low-temperature discharge performance of the battery was significantly improved. This work can help improve the low-temperature performance of Li-ion batteries and expand its application areas.
研究领域:
材料科学
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电化学
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能源技术
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DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2020
·Vol. 167
·期 10
·107505
·
IF 3.721
Peijin Wang,Qian Wu,Caixia Wang,Yuxin Pu,Mao Zhou,Mingxiao Zhang
In this work, a sensitive polyethylenimine functionalized Perylene derivative PTC-PEI, S2O82− and 3D flower-like MoS2 (3D MoS2 NFs) ternary system was fabricated for quantitation of Methotrexate (MTX) based on the quenched electrochemiluminescence (ECL) signals. Specifically, the PTC-PEI was prepared via cross-linking Perylenetetracarboxylic acid (PTCA) and polyethylenimine (PEI). Then, the hybrid nanocomposite PTC-PEI-MoS2 was synthysized through electrostatic absorption effect between PTC-PEI and 3D MoS2 NFs. With the excellent catalytic effect of 3D MoS2 NFs towards the electrochemical reduction process of S2O82− thus resulting in generation of more sulfate radical anions (SO4·−), the ECL signal probe PTC-PEI-MoS2 exhibits higher luminous efficiency compared with PTC-PEI (3-fold enhancement). In addition, electrochemical regenerable property of Mo6+/Mo4+ active sites endows 3D MoS2 NFs excellent signal enhancement efficiency. Under the optimum conditions, a linear range from 10 μM to 1pM with the limit of detection down to 0.15 pM could be obtained in MTX determination. Notably, the proposed strategy provides a new idea for sensitive determination of MTX.
研究领域:
分析化学
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纳米材料
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电化学
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生物传感器
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高影响因子
BIOSENSORS & BIOELECTRONICS
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2014
·
IF 6.451
Liuliu Gao,Junlin He,Wailan Xu,Jing Zhang,Junmin Hui,Yanlei Guo,Wenjuan Li,Chao Yu
α2,6-Sialylated glycans are crucial molecular targets for cancer diagnosis and clinical research. In this work, a novel ultrasensitive electrochemical biosensor was fabricated based on a graphite oxide (GO), Prussian blue (PB), and PTC-NH 2 (an ammonolysis product of 3,4,9,10-perylenetetracarboxylic dianhydride) nanocomposite for the selective detection of α2,6-sialylated glycans. To increase the sensitivity of the electrochemical biosensor, gold nanoparticles (GNPs) were immobilized on a GO–PB–PTC-NH 2 modified glassy carbon electrode (GCE). Sambucus nigra agglutinins (SNAs), which specifically bind with α2,6-sialylated glycans, were covalently immobilized on GNPs for the sensitive detection of α2,6-sialylated glycans in serum. This proposed method can be applied to human serum, and it worked well over a broad linear range (0.1 pg mL −1 –500 ng mL −1 ) with detection limits of 0.03 pg mL −1 . Moreover, recovery of the spiked samples ranged from 100.2% to 105.0%, suggesting that this excellent electrochemical biosensor can be used for the practical detection of α2,6-sialylated glycans.
研究领域:
生物医学工程
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分析化学
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癌症诊断
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DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2021
·
IF 7.46
Jia Ding,Fei Liu,Chunling Qi,Yunlei Zhou,Huanshun Yin,Shiyun Ai
A novel photoelectrochemical (PEC) biosensor was constructed for DNA hydroxymethylation detection based on Bi 4 NbO 8 Cl/PTC-NH 2 heterojunction and Fe-MIL-88NH 2 , where Bi 4 NbO 8 Cl/PTC-NH 2 was employed as photoactive material and Fe-MIL-88NH 2 was adopted as artificial hydrogen peroxide mimic enzyme. Based on the structure of hydroxymethylated cytosine in DNA sequence, 5-hydroxymethyl-2’-deoxycytidine (5hmdC) was employed as detected target molecule for the first time using PEC technique. After Bi 4 NbO 8 Cl/PTC-NH 2 heterojunction was modified on the substrate electrode, thioglycolic acid (TGA) was captured by forming amide bond, where the sulfhydryl group (-SH) of TGA was employed as the specific recognition of 5hmdC. Under M. HhaI catalysis, the −CH 2 OH of 5hmdC reacted selectively with the –SH. Finally, Fe-MIL-88NH 2 was modified on the electrode based on the crosslinker of 4-formylphenylboronic acid (FPBA), where FPBA possessed two active groups of formyl and boronic acid group, reacting with glycosyl of 5hmdC and amino of Fe-MIL-88NH 2 . Under the catalysis effect of Fe-MIL-88NH 2 , the insoluble substance was produced on the surface of electrodes, resulting in distinct lessening of PEC response. Under optimal conditions, the photocurrent shows a linear relationship with the logarithm value of 5hmdC concentration from 0.01-100 nM with a low detection limit of 6.48 pM. More importantly, this method can be applied to investigate the influence of exogenous phytohormone on 5hmdC content in the genomic DNA of rice seedling roots and leaves.
研究领域:
材料科学
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分析化学
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生物传感器
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生物化学
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纳米技术
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电化学
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基因组学
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高影响因子
DALTON TRANSACTIONS
·
2017
·Vol. 46
·期 32
·10630-10634
·
IF 4.029
Mei-Yan Gao,Shumei Chen,Lan-Xia Hu,Lei Zhang,Jian Zhang
Four titanium-oxo-clusters with cyclohex-3-ene-1-carboxylate (Cec) ligands, Ti6(μ2-O)2(μ3-O)2(Cec)4(OiPr)12 (PTC-91; HOiPr = isopropanol), Ti6(μ3-O)6(Cec)6(OiPr)6 (PTC-92 and PTC-93) and H2[Ti18(μ2-O)11(μ3-O)14(Cec)20(OiPr)4] (PTC-94), have been solvothermally synthesized under different conditions, respectively. These clusters with the same Cec ligand show totally different structures, and they are stable in water and other common solvents. The Ti6 clusters with different conformations are presented in PTC-91, PTC-92 and PTC-93, while PTC-94 is an unusual Ti18 cluster. The photocatalytic studies reveal that PTC-91 and PTC-94 have good H2 evolution ability.
研究领域:
材料化学
·
光催化
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2021
·
IF 10.588
Jiali Tang,Yingbi Chen,Minghu Zhao,Shixing Wang,Libo Zhang
A novel metal-organic framework (UiO-66-PTC) for efficient removal of Pb 2+ ions from wastewater has been prepared by using 4-phenyl-3-thiosemicarbazide as the modifier. Various characterizations showed that UiO-66-PTC was successfully synthesized. The absorption results showed that the maximum adsorption capacity of Pb(II) is 200.17 mg/g at 303 K and optimal pH 5. The adsorption kinetic follows the pseudo-second-order model and the adsorption isotherms fit the Langmuir model. This shows that Pb(II) is a single-layer adsorption on the surface of the adsorbent and the rate-controlling step is chemical adsorption . The thermodynamic results show that the adsorption process can proceed spontaneously, belong to the exothermic reaction . The adsorbent can selectively uptake lead ions from wastewater containing multiple interfering ions. After four adsorption and desorption cycles, the adsorption efficiency is still high. The adsorption mechanism of Pb(II) on the adsorbent is mainly through the chelation of Pb(II) with N and S atoms. These results indicate that UiO-66-PTC is an effective material for efficiently and selectivity removal of Pb(II) from solution, which is of practical significance.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
POLYMER
·
2022
·
IF 4.432
Can Zhou,Yangyang Zhang,Fangjie Cen,Xie Yu,Wenjing Zhou,Shenglin Jiang,Yan Yu
Polymer PTC (positive temperature coefficient) materials with low switching temperature point are important for many electronic devices since the electronic devices usually work under room temperature range (0–40 °C). The desired polymer PTC materials for the application in thermal control of flexible electronics should also include room-temperature switching temperature, low room-temperature resistivity, good mechanical flexibility and adaptive thermal control performances. This work designed two new types of PTC materials with room-temperature switching temperature and excellent mechanical properties . They are prepared by mixing the semi-crystalline polymer EVA with low melting temperature (Tm) with the amorphous polymer (PS or PVAc) with low glass transition temperature (Tg), while the low-cost graphite is selected as conductive filler. The PTC materials were obtained with low switching temperature point (<30 °C) and low room temperature resistivity (102 Ω m), high PTC repeatability and flexibility, short heating response time and good adaptive thermal control performances.
研究领域:
材料科学
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电子工程
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DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 28
·22289-22293
·
IF 3.84
Qiyi Lu,Juanjuan Zhang,Yuanya Wu,Ruo Yuan,Shihong Chen
The cathodic electrochemiluminescence (ECL) behavior of the ammonolysis product of 3,4,9,10-perylenetetracarboxylic dianhydride (PTC–NH2) in aqueous solution with K2S2O8 as the co-reactant has been, for the first time reported, in this paper. The possible mechanisms have been investigated. Based on the fact that dopamine (DA) can efficiently quench the ECL intensity of PTC–NH2, DA was chosen as a template to investigate the application of PTC–NH2–S2O82− system in the sensor field. Under the optimal conditions, we achieved the detection of DA with the detection limit of 1.6 × 10−9 M. Due to the excellent ECL behavior, PTC–NH2 could be a new class of promising material for the construction of ECL sensors.
研究领域:
分析化学
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生物传感
·
材料科学
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2026
·
IF 3.1
Fanze Meng,Bi Wu,Xiaoguang Yang,Peng Wang,Haitao Ma,Deli Duan
Graphene nanosheets/silicone rubber (GNs/RTVSR) nanocomposites were fabricated to investigate the effect of thermomechanical–electrical coupling mechanism on their positive temperature coefficient (PTC) behavior. Heat treatment and graphene nanosheet size design were employed to tailor the thermal, mechanical, and electrical properties of the nanocomposites. Heat treatment removed organotin from the RTVSR matrix, as confirmed by XPS, FTIR, and in situ SEM, thereby enhancing the resistance stability of the nanocomposites. The slight variations in PTC behavior observed after treatment were associated with nanosheet size and transient temperature responses. Based on these results, the PTC mechanism governed by thermomechanical behavior and viscoelasticity was discussed. The steady-state PTC behavior of nanocomposites was described by a prediction model that combined thermomechanical and electrical conduction percolation. The PTC values of the nanocomposites with heat treatment and different GNs sizes could be predicted by this model. Meanwhile, DMA and other thermomechanical analyses revealed a strong correlation between time-dependent resistance attenuation and viscoelasticity of the nanocomposites. The PTC mechanism composed of steady model and transient analyses unmasked intensity differences and process deviation of resistance change rate. It explained the temperature self-limited heating behavior of nanocomposites.
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高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2026
·
IF 9.8
Teng Li,Chang Dong,Li Yang,Hui-Kang Xu,Gui-Lin Song,Jie Li,Yue-Yi Wang,Ding-Xiang Yan,Zhong-Ming Li
Positive temperature coefficient (PTC) composites with low switching temperature (T s ) are critical for self-regulating heating in spacecraft optical systems and energy systems, nevertheless, balancing low initial resistivity, high PTC intensity, and fast heating rate is still challenged. This work designs a novel low T s PTC composite with series structure to conquer such contradictions, comprising a PTC switching module as interlayer and highly conductive heating modules as upper/lower layers. The architecture simultaneously leverages the sharp PTC effect of interlayers and rapid heating effect of upper/lower layers, resulting in obvious advantages in pyroresistivity properties and self-regulating heating performance. The series-structured composite achieves improved PTC intensity of 6.7 with the corresponding heater average heating rate of 25.8 °C/min, in comparison to 6.2 and 7.8 °C/min for the conventional PTC composite, while these two composites possess similar low T s (38 °C) and initial resistivity (45 Ω cm). The series-structured composite also demonstrates exceptional reproducibility of pyroresistivity properties with 89 % resistivity retention over 500 heating-cooling cycles. Furthermore, as an innovative design architecture transcending compositional constraints, adjusting module compositions enables flexible tuning of pyroresistivity properties of the series-structured composites and average heating rates and equilibrium temperatures of the corresponding heater without compromising stability. This work provides a new guideline for developing low T s PTC composites with potential applications in customizable aerospace de-icing, automotive heaters, and battery thermal management systems.
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Science China-Materials
·
2025
·
IF 7.4
Dong Chang,Liu Huan-Huan,Li Teng,Yang Li,Song Gui-Lin,Xu Hui-Kang,Lei Jun,Li Jie,Yan Ding-Xiang,Li Zhong-Ming
Polymer-based positive temperature coefficient (PTC) composites show exceptional potential for smart thermal management owing to temperature-responsive resistivity. However, conventional PTC composites with high Curie temperatures ( T c > 50 °C) are unsuitable for precision electronics requiring room-temperature operation. The development of low-Tc composites ( T c < 50 °C) faces challenges in balancing electrical resistivity, stability, and sensitivity. We present a ternary composite design where carbon black (CB) is selectively dispersed in myristyl alcohol (MA) phase, stabilized by an ethylene vinyl acetate (EVA) matrix. The reversible solid-liquid transition of MA dynamically modulates CB conductive networks, while the elasticity of EVA suppresses phase migration under elevated thermal conditions. The MA/EVA/CB composite achieves unprecedented performance: low T c (35 °C), ultralow initial resistivity (50 Ω cm), high PTC intensity (7.0), and exceptional cycling stability (>95% resistivity retention after 100 thermal cycles), surpassing previous benchmarks. Even after real space-environment exposure for 14 days, it retains ultralow resistivity and high PTC intensity. DSC/FTIR analyses confirm molecular integrity, validating stability under extreme conditions. Microstructural studies reveal that MA phase melting/crystallization governs conductive network disruption/reconfiguration. A self-regulating heater fabricated from this composite stabilizes an aluminum block at near T c (30.6 ± 0.03 °C) at 20 V and −10 °C environments without external controls. The low- T c PTC composites demonstrate transformative potential in adaptive thermal management for aerospace electronics.
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高影响因子
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