JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Tianjiao Meng,Dan Zhao,Huimin Ye,Yue Feng,Huan Wang,Yufan Zhang
A hybridization chain reaction (HCR) amplification-based electrochemical impedimetric biosensor is fabricated for the quick, sensitive, and specific detection of miRNA-21 (miR-21) via monitoring of electrode interfacial property changes in real-time. Two sequences of H1 and H2 are adopted to trigger HCR amplification. A large amount of linear DNA concatemer are formed which could change the interfacial properties of the electrode. Interfacial charge transfer resistance difference ( R ct ) is probed via electrochemical impedance spectroscopy (EIS) and Randles equivalent circuit. After amplifying via HCR, oligonucleotides with negatively charged repelling [Fe(CN) 6 ] 3−/4− ions can form a spatial blockage. HCR amplification strategy markedly enhanced the electrochemical signal with a limit of detection (LOD) down to 4.63 fM (S/N = 3). This strategy exhibited excellent selectivity for three different miRNAs: miR-199a, miR-141, and miR-155. Moreover, results show that the proposed method can be applied to miR-21 detection in the total RNA extracted from five cells. This work presents an enzyme-free and label-free EIS nucleic acid sensor for sensitively and selectively detecting miR-21, offering a promising approach in early diseases diagnosis.
研究领域:
生物化学
·
分析化学
·
生物技术
·
分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2024
·
IF 4.3
Hongsen Chen,Dan Jin,Tingyou Yu,Yuguo Du,Xiaolong Yang
Ti 3 C 2 T x MXene material exhibits exceptional dielectric properties and a distinct layered structure, making it a noteworthy microwave absorbing material. However, its microwave absorption performance is limited due to poor impedance matching and a single loss mechanism. To address these issues, this work develops a solvothermal method to introduce the magnetic component CoNi alloy and generate organic polymer PANI through in-situ polymerization, resulting in the preparation of Ti 3 C 2 T x /PANI/CoNi ternary composites that significantly improve impedance matching and microwave absorption performance. The microwave absorption properties of the binary and ternary composites are compared, and the superior performance of the ternary composites is emphasized. Among the ternary composites, M-P-CN 3:1:8 exhibited an excellent microwave absorption performance, demonstrating a minimum RL value of −55.48 dB and an effective absorption bandwidth of 5.1 GHz at a thickness of 2.0 mm. The synergistic effect of multiple loss mechanisms, multilayer structures, and multiple interfacial polarization methods further contribute to the enhanced microwave absorption performance of ternary composites. This study provides a straightforward method for synthesizing and designing multi-component composite absorbing materials based on MXene.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2023
·
IF 4
Ting Zhao,Han Zhang,Hai-Hong Zhang,De-Qiang Yi,Jian-Feng Zhu,Yi Qin
The rapid development of communications technology has exacerbated the deterioration of the electromagnetic environment and therefore there is an urgent need to develop efficient electromagnetic wave absorbing materials. Based on the idea of constructing the ferrite-alloy-glass multiphase heterogeneous microstructure, core-shell-like NiFe 2 O 4 /Ni 3 Fe/LAS nanocomposites has been successfully prepared by using sol-gel, hydrothermal and in situ reduction methods. In which, NiFe 2 O 4 and Ni 3 Fe provide strong magnetic and dielectric losses , while the introduction of the LAS (Lithium aluminum silicate, Li 2 O–Al 2 O 3 –SiO 2 glass) wave-transparent phase modulates the complex dielectric constant, and effectively improving impedance matching. The multi-component nature of NiFe 2 O 4 /Ni 3 Fe/LAS produces abundant heterogeneous interfaces, and the strong interfacial polarization contributes to the attenuation of electromagnetic waves. At the thickness of 2.3 mm, the reflection loss (RL) of NiFe 2 O 4 /Ni 3 Fe/LAS reaches −50.7 dB at 11.36 GHz with an effective absorption bandwidth (EAB) of 5.04 GHz, while at 2.0 mm the EAB is up to 7 GHz. Importantly, the NiFe 2 O 4 /Ni 3 Fe/LAS nanocomposites achieve effective absorption (RL < −10 dB) in the C, X and Ku bands (5–18 GHz). This work is expected to offer prospects for high-performance and ultra-broadband composite microwave-absorbing materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
ECS Journal of Solid State Science and Technology
·
2024
·Vol. 13
·期 3
·037005
·
IF 1.8
Ning Lu,Boyu Guo,Zhikang Rao,Juntao Chen,Ying Xu
Electrochemical impedance sensors are widely used for bacterial detection and interpreted by the equivalent circuit model (ECM) to evaluate the concentration changes on the electrode interface. However, this method is mainly based on prior models and focuses on frequency domain analysis which cannot precisely describe unknown dynamic processes and a fractional surface coverage of electrode. Distribution of Relaxation Times (DRT) method, as an alternative to interpret impedance spectra can be applied to solve the problem. In this research, two electrode schemes with different modification steps were designed to collect impedance data. An Ensemble Tree-SHAP model was then adopted to quantitatively analyze the impedance data processed by ECM-DRT method in time-frequency domain and applied for the detection of Escherichia coli (E.coli). The results showed that using a dataset integrated with time-frequency domain features significantly improved the accuracy of bacterial concentration prediction. As a result, the RMSE of untrained concentration with LightGBM model was 6.4\times 1{0}^{-4}\,log CFU ml−1, with the sensor detection limit about 2.69 log CFU ml−1. The research provided a tool combining time-frequency analysis for accurate prediction of bacterial concentration, which is crucial for evaluation of the antibacterial effect of long-term antibiotics on E.coli in future.
研究领域:
生物医学工程
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2014
·
IF 3.84
Qionghua Zhu,Feng Gao,Yizhen Yang,Bin Zhang,Wei Wang,Zhengshui Hu,Qingxiang Wang
A highly sensitive impedimetric DNA biosensor based on rod-like bismuth sulfide nano (rBi 2 S 3 ) and polyaniline (PANI) nanocomposite film modified ionic liquid-carbon paste electrode (IL-CPE) has been developed. The rBi 2 S 3 particles were first dropt on IL-CPE that was constituted with 1-butyl-3-methylimidazolium hexafluorophosphate (BMIMPF 6 ) and graphite powder, and then the PANI polymer was deposited on the surface of rBi 2 S 3 through potentiodynamic polymerization using aniline as the source, forming the PANI capped Bi 2 S 3 nanocomposite. The morphologies and electrocatalytic property of the composite were characterized by scanning electron microscopy (SEM) and electrochemical techniques including electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV), respectively. The integrated advantages such as the large surface area, excellent electronic conductivity, easy to fabrication, and good biocompatibility make the electrode favorable for DNA immobilization and hybridization detection. It was found that remarkable increase of electrochemical impedance was observed after the probe DNA modified electrode was hybridized with the target DNA. The dynamic detection range was determined to be from 1.0 × 10 −15 to 1.0 × 10 −11 M with a detection limit of 4.37 × 10 −16 M. The DNA biosensor also displayed good regeneration ability, reproducibility and stability.
研究领域:
材料科学
·
电化学
·
生物传感器
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Cheng-Tao Li,Meng-Xiao Chong,Le-Xi Zhang,Bo Tang,Li-Jian Bie
Halide perovskite (HP) materials have attracted much attention in recent years in the fields of smart home and medical detection due to their low fabrication cost, simple preparation process, controllable properties, and adjustable morphology. However, the inherent instability and toxicity of lead has been barriers limiting the practicality in electronical devices. Here, we demonstrate a high-performance impedimetric humidity sensor based on an all-inorganic lead-free HP Cs 2 TeBr 6 for the first time. The Cs 2 TeBr 6 sensor achieves ultra-high response value of 5 orders of magnitude (8.89 × 10 5 ) at 11–97 % relative humidity (RH), short response time (4 s), favorable repeatability, and good long-term stability. Moreover, high humidity sensing performance enables the Cs 2 TeBr 6 sensor to enjoy great potentials in real-time touchless human breath and finger detections. In addition, the mechanism of moisture sensitivity is explained by complex impedance spectra at different humidity levels. This work contributes an attracting candidate material for humidity sensors, and furthermore provides new insights into next-generation sensory devices using lead-free HPs for human-related detections.
研究领域:
材料科学
·
电子学
·
传感器
·
医疗检测
·
智能家居
✓ 已验证
DOI
高影响因子
CARBON
·
2024
·
IF 10.5
Xiaotong Sun,Ze Wu,Xiuli Tan,Youqiang Xing,Peng Huang,Bingjue Li,Lei Liu
Research on developing highly efficient microwave absorption (MA) absorbers is crucial for addressing electromagnetic (EM) pollution and advancing stealth technology. MXene, a new class of MA materials, have been widely studied . Nevertheless, MXene often faces challenges such as high self-stacking and excessive electrical conductivity, which lead to poor impedance matching. To overcome these problems, the unique manufacturing produces an overall homogeneous and locally aggregated MXene in the form of island chains, enhancing electrical conductivity and polarization loss while alleviating the self-stacking problem of MXene nanosheets. Further improvement is achieved by modifying the N–CNF@MXene aerogel with MoS 2 through atomic layer deposition (ALD). This modification resulted in a layered core-sheath structure featuring the N–CNF@MXene@MoS 2 aerogel (NCMMA) absorber. Importantly, this process preserved the intrinsic structure of the material while significantly enhancing its MA performance. NCMMA has a minimum reflection loss RL min of −78.32 dB (3.49 mm) with a fill factor of only 3.97 %. The effective absorption bandwidth (EAB) is 7.58 GHz (2.5 mm), covering the Ku band. The unique joint process design of hierarchical core-sheath in situ heterogeneous interfaces combined with the complex interpenetrating conductive network structure employed in this work is a strong candidate for MA materials for next-generation lightweight stealth coatings.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2019
·Vol. 6
·期 2
·590-597
·
IF 5.934
Xiaoqing Cui,Wei Liu,Weihua Gu,Xiaohui Liang,Guangbin Ji
In recent years, two-dimensional inorganic materials (MoS2) have been promising candidates for EM wave absorber because of their high specific surface area, excellent electronic properties and dielectric loss caused by polymorphism. Nevertheless, the poor impedance matching of individual MoS2 limited its microwave absorption performance. Optimizing the impedance matching of microwave absorber can be an effective way to achieve electromagnetic wave attenuation. In this study, we deposited CoFe2O4 magnetic nanoparticles on the surface of MoS2 nanosheets using reasonable hydrothermal reactions to optimize its poor impedance and enhance interfacial polarization. The MC-6 composite (mMoS2 : mCoFe2O4 = 6 : 1) exhibited excellent microwave absorption capability. The minimum reflection loss (RL) reached −55.3 dB at 16.24 GHz (Ku band) and the effective absorption bandwidth (<−10 dB) was measured to be 6.26 GHz (X band) with a thickness of 1.6 mm. This study confirms that optimizing impedance matching and interfacial polarization of MoS2-based composites play a key role in the microwave response. Moreover, the reasonable optimization of impedance matching enables regulation of the effective bandwidth and strong absorption intensity.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2013
·Vol. 5
·期 13
·5833-5840
·
IF 6.233
Li-qiang Luo,Zhao Zhang,Ya-ping Ding,Dong-mei Deng,Xiao-li Zhu,Zhen-xin Wang
In this work, we proposed a novel simple protocol for preparing 1-aminopyrene/graphene (ApG) hybrids for fabricating label-free electrochemical impedance genosensor. Graphene, with the structure of a single-atom-thick sheet of sp2-bonded carbon atoms, was anchored to 1-aminopyrene (1-Ap) with the pyrenyl group via π-stacking interaction. The morphology, conductivity, and interaction of ApG hybrids were characterized by transmission electron microscopy (TEM), cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), UV-visible (UV-vis) and fluorescence spectra. The amino-substituted oligonucleotide probe was conjugated to 1-Ap by the cross-linker glutaraldehyde. The DNA hybridization reaction of oligonucleotide probe with target DNA was monitored by EIS. Under optimum conditions, the proposed biosensor exhibited high sensitivity and a low detection limit for detecting the complementary oligonucleotide. The target oligonucleotide could be quantified in a wide range of 1.0 × 10−12 to 1.0 × 10−8 M with good linearity (R = 0.9900) and low detection limit of 4.5 × 10−13 M (S/N = 3).
研究领域:
纳米材料
·
生物传感器
·
电化学
·
遗传学
✓ 已验证
DOI
PubMed
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Hongliang Li,Tong Zhang,Zi Yang,Yueli Shi,Quanchao Zhuang,Yanhua Cui
The electrochemical impedance spectroscopy (EIS) technique has been widely used for analysing lithium battery systems, especially to determine kinetic and transport parameters, understand reaction mechanisms, and study capacity fade mechanisms. In this work, the initial charge-discharge process of LiCoO 2 @LiNbO 3 /Li 10 GeP 2 S 12 /Li (LLCO/LGPS/Li) and LiNi 0.5 Co 0.2 Mn 0.3 O 2 @LiNbO 3 /Li 10 GeP 2 S 12 /Li (LNCM523/LGPS/Li) batteries at different potentials was systematically investigated by EIS. During the lithium-ion insertion-removal process, the Nyquist plots of both LLCO/LGPS/Li and LNCM523/LGPS/Li batteries are composed of three parts, namely, two semicircles and an inclined line, which can be attributed to the interfacial impedance between the solid electrolyte and electrode, the charge transfer process, and the solid-state diffusion of the lithium-ion in the cathode with decreasing frequency, respectively. A proper equivalent circuit is proposed to fit the experimental EIS data and the variations in the interfacial resistance ( R if ) between the solid electrolytes (SEs) and electrode. The charge transfer resistance ( R ct ) along with the increase or decrease in the electrode polarization potential is quantitatively analysed in detail. Based on the experimental results, it has been revealed that, the increase in R if between the solid electrolyte and electrode may cause the capacity fade of all-solid-state batteries during charge-discharge.
研究领域:
电化学
·
材料科学
·
能源存储
·
固态离子学
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Yujian Liu,Limin Liu,Jinsong Peng,Xiaoliang Zhou,Dongshi Liang,Lei Zhao,Jiawen Su,Bo Zhang,Si Li,Naiqing Zhang,Qianli Ma,Frank Tietz
Although research on all-solid-state sodium batteries (ASSSBs) have been conducted for many years, the solid-state electrolyte (SSE) material is still far from practical application at room temperature . One major reason is that no suitable electrolyte material with high ionic conductivity has been found yet. In this study, Nb 5+ is introduced into NASICON-type solid electrolyte, where Nb 5+ substituted Na 3.4 Zr 2 Si 2.4 P 0.6 O 12 (NZSP) is prepared by a solution-assisted solid-state reaction method. The best ionic conductivity is as high as 5.51 mS cm −1 which is a significant improvement. High-frequency electrochemical impedance spectroscopy shows that the increase in total conductivity is mainly due to the decrease of grain boundary impedance as well as bulk impedance. The decrease in grain boundary impedance is probably owing to the increase in density of the electrolyte material after incorporation of the Nb content, which has a beneficial impact of the sintering of NZSP. The decrease in bulk impedance rather results from the ratio of sodium ion concentration and sodium vacancy concentration of 3.3:0.7 in the crystal structure, thus facilitating the sodium ion transport. Symmetric cells with sodium metal as electrodes (Na|Nb 5+ substituted NZSP|Na) are subsequently assembled and cycled stably for 60 cycles at a current density of 0.05 mA/cm 2 .
研究领域:
材料科学
·
电化学
·
能量存储
·
固态电解质
✓ 已验证
DOI
高影响因子
Materials
·
2019
·Vol. 13
·期 1
·111
·
IF 2.972
Xia Zhao,Shuai Yuan,Zuquan Jin,Binbin Zhang,Nazhen Liu,Shibo Chen,Shuan Liu,Xiaolin Sun,Jizhou Duan
Given their outstanding versatile properties, multilayered anticorrosion coatings have drawn great interest from researchers in the academic and engineering fields. However, the application of multilayered coatings is restricted by some limitations such as low interlayer compatibilities, the harsh preparation process, etc. This work introduced a composite film fabricated on a 2A12 aluminum alloy surface, including an anodic oxide film, a sol–gel film, and a layer-by-layer (LBL) self-assembling film from bottom to top. The microstructure and elemental characterization indicated that the finish of the coating with the LBL film resulted in a closely connected multilayered coating with a smoother surface. The anticorrosion performance was systematically evaluated in the simulated corrosive medium and neutral salt spray environment. The integrated coating with the LBL film presented an excellent anticorrosion ability with system impedance over 108Ω·cm2and a self-corrosion current density two orders of magnitude lower than that of the other coatings. After the acceleration test in a salt spray environment, the multilayered coatings could still show a good protective performance with almost no cracks and no penetration of chloride ions. It is believed that the as-constructed multilayered coating with high corrosive properties and a fine surface state will have promising applications in the field of anticorrosion engineering.Keywords:multilayer;corrosion;impedance;layer-by-layer
研究领域:
材料科学
·
腐蚀与防护
✓ 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）