JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2023
·Vol. 34
·期 16
·1-9
·
IF 2.8
Tong Huijuan,Wan Jiajia,Wang Sanlong,Yu Yang,Zhang Wenqing,Liu Rui,Huang Junjun
Electromagnetic shielding has becoming a priority of researches in recent years due to electromagnetic wave pollution with the rise of electromagnetic wave. However, the present silver printed composite material is costly, which would give rise to the waste of precious metal resources. A simple method involving electroless plating, which constructs the textured electromagnetic shielding material, has been proposed and demonstrated in this paper. The inner connection between the copper tube structure and the electromagnetic shielding effect is also studied. Results indicate that the metal particle/ligand structure on the woven fabric surface can be geared up for catalyzing the deposition of copper particles, which can self-assemble to form copper tubes. The copper tube has a face-centered cubic structure with a content of 45%, the electromagnetic shielding performance of the textured copper tube is 26 dB, in which the absorbed power coefficient of this structure is 0.73, the transmission is 0.003, and this material can pass 1000 times of bending tests at different angles. Therefore, electromagnetic shielding materials can be manufactured by electroless plating and applied to the production of protective clothing for pregnant women and shielding wall coverings.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 10
·2383
·
IF 4.2
Zhi Yang,Lu Yang,Yucun Liu,Lei Chen
Surface-enhanced Raman scattering (SERS) is a promising technique for sensitive detection. The design and optimization of plasma-enhanced structures for SERS applications is an interesting challenge. In this study, we found that the SERS activity of MXene (Ti3C2Tx) can be improved by adding Au nanoparticles (NPs) in a simple photoreduction process. Fluoride-salt-etched MXene was deposited by drop-casting on a glass slide, and Au NPs were formed by the photocatalytic growth of gold(III) chloride trihydrate solutions under ultraviolet (UV) irradiation. The Au–MXene substrate formed by Au NPs anchored on the Ti3C2Txsheet produced significant SERS through the synergistic effect of chemical and electromagnetic mechanisms. The structure and size of the Au-decorated MXene depended on the reaction time. When the MXene films were irradiated with a large number of UV photons, the size of the Au NPs increased. Hot spots were formed in the nanoscale gaps between the Au NPs, and the abundant surface functional groups of the MXene effectively adsorbed and interacted with the probe molecules. Simultaneously, as a SERS substrate, the proposed Au–MXene composite exhibited a wider linear range of 10−4–10−9mol/L for detecting carbendazim. In addition, the enhancement factor of the optimized SERS substrate Au–MXene was 1.39 × 106, and its relative standard deviation was less than 13%. This study provides a new concept for extending experimental strategies to further improve the performance of SERS.
研究领域:
材料科学
·
分析化学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED ELECTROCHEMISTRY
·
2022
·Vol. 52
·期 5
·885-893
·
IF 2.925
Zhao Fei,Xue Wenwen,Zhang Hongfang
Abnormal expression and functioning of microRNAs in the immune system are frequently linked to various cancers. Our previous work demonstrated a universal, label-free, and reliable microRNA detection platform based on the nanochannels-based recognition interface and electrode-based sensing interface. Herein, the strategy of G-quadruplex DNAzyme-catalyzed deposition was introduced into the nanochannels to improve the detection sensitivity of the platform. G-quadruplex DNAzyme could catalyze the oxidation of 4-chloro-1-naphthol to produce insoluble precipitates into the nanochannels which amplified the effect of the hybridization reaction between the capture probe and the target to the mass transport of the redox probe through the recognition interface. Then, a porous carbon nanofibers-modified electrode was applied to further amplify the monitoring sensitivity of the sensing interface to the concentration change of the redox probe methylene blue. Thereby, sensitive electrochemical detection of microRNA-21 was acquired. The biosensing platform exhibited a broad linear range of 100 aM to 1 nM for microRNA-21, with a low detection limit of 40 aM. What is more, the selective and reproducible platform provided an alternative technique for the PCR-free determination of microRNA in serum and tumor cells. Graphical abstract
研究领域:
生物化学
·
分子生物学
·
癌症研究
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2014
·
IF 3.84
Jianping Li,Weiling Yin,Yanji Tan,Hongcheng Pan
A novel strategy for improving the sensitivity of a molecularly imprinted sensor was proposed based on the amplification effect derived from the electrochemical stripping of copper produced by catalytic deposition by silver nanoparticles (AgNPs). Polypyrrole was electrochemically polymerized to prepare a molecularly imprinted polymer film using 3-indoleacetic acid (IAA) as a template. After the competitive reaction between IAA and thiolation-3-indoleacetic acid (IAA-S), IAA-S was labeled with AgNPs, and then copper was catalytically reduced and deposited onto the AgNP surface. The deposited copper was electrochemically dissolved, and the anodic stripping current was recorded using linear sweep voltammetry. The change in signal decreased when IAA-S was replaced by IAA in the samples. The peak current was proportional to the logarithm of the concentration of IAA in the range of 9 × 10 −10 –6 × 10 −7 mol/L, with a detection limit of 2.31 × 10 −10 mol/L determined by the 3 σ rule. Samples were assayed, and the recoveries of the approach ranged within 99.7–104.2%.
研究领域:
分析化学
·
生物技术
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Xixiang Xie,Junxiang Zeng,Xianli Lan,Xiyu Liu,Jian He,Pan Wu,Yan Huang,Mengqi Chen,Meiyan Wu,Guiyin Li,Liang Shi,Yong Huang
As cholesterol is very intimately linked to the development of many types of cardiovascular diseases, clinical medicine must have a straightforward and precise method for determining total serum cholesterol (TC). Nowadays, enzymatic methods are routinely used in laboratories for the determination of TC, using cholesterol oxidase and esterase reagents for quantitative analysis on fully automated instruments. In this work, an electrochemical biosensor was developed for highly sensitive detection of cholesterol by modified modification of screen-printed carbon electrode (SPCE) and reduction of peroxidase-mimetic catalytic activity of reduced graphene oxide-hemin (RGO-hemin) nano-enzyme. The hydrolysis of cholesterol produced H 2 O 2 when it was subjected to the actions of cholesterol oxidase (CHOD), cholesterol esterase (CHER), and RGO-hemin. In the presence of H 2 O 2 , ferrocene-tyramine (Fc-Tyr) triggers catalytic deposition amplification effect on the SPCE surface, a great deal of electroactive ferrocene marker accumulates on the electrode surface, and Fc-Tyr is measured by an electrochemical workstation. The redox electrical signal detects the concentration of cholesterol in the sample. The biosensor had an operating range of 0.1∼5 mg/mL and a sensitivity of 24.43 μg/mL with acceptable specificity. The electrochemical cholesterol biosensor sensitively captured cholesterol signals in a complex body fluid environment and showed results consistent with clinical trials, with 96.63∼107.32 % recovery and 0.78∼5.28 % relative standard deviation (RSD). Therefore, there is a significant chance that the cholesterol biosensor by the institute will be used in clinical settings to detect serum cholesterol.
研究领域:
生物医学工程
·
临床检验学
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产品关联
DOI
高影响因子
Small
·
2023
·Vol. 19
·期 24
·2207362
·
IF 13.3
Yaqiang Ji,Yuan Zhang,Jiaqi Zhu,Pai Geng,Jonathan E. Halpert,Liang Guo
Flexible pressure sensors play an indispensable role in flexible electronics. Microstructures on flexible electrodes have been proven to be effective in improving the sensitivity of pressure sensors. However, it remains a challenge to develop such microstructured flexible electrodes in a convenient way. Inspired by splashed particles from laser processing, herein, a method for customizing microstructured flexible electrodes by femtosecond laser-activated metal deposition is proposed. It takes advantage of the catalyzing particles scattered during femtosecond laser ablation and is particularly suitable for moldless, maskless, and low-cost fabrication of microstructured metal layers on polydimethylsiloxane (PDMS). Robust bonding at the PDMS/Cu interface is evidenced by the scotch tape test and the duration test over 10 000 bending cycles. Benefiting from the firm interface, the developed flexible capacitive pressure sensor with microstructured electrodes presents several conspicuous features, including a sensitivity (0.22 kPa −1 ) 73 times higher than the one using flat Cu electrodes, ultralow detection limit (<1 Pa), rapid response/recovery time (4.2/5.3 ms), and excellent stability. Moreover, the proposed method, inheriting the merits of laser direct writing, is capable of fabricating a pressure sensor array in a maskless manner for spatial pressure mapping.
研究领域:
生物医学工程
·
柔性电子学
·
微纳加工
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传感器技术
·
材料科学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Ruhui Hu,Suyun Zhong,Hezhen Liu,Yawen Liu,Hongxia Chen,Xiaojun Hu
A dual-ligand Cu-MOFs (Cu-F/Hs) based on phenylalanine (Phe) and histidine (His) was innovatively constructed with enhanced catalytic property. Among them, Phe can interact with the dopamine (DA) to enhance the substrate affinity. Meanwhile, the coordination of His with copper ions was inspired by the active site structure of natural laccase to improve the catalytic activity. The K m value of Cu-F/Hs was 0.14 times of laccase, indicating a high affinity for the catalytic substrate DA. Accordingly, a sensitive sensor for PD-L1 detection was designed by using Cu-F/Hs, which can catalyze DA to form redox-active polymeric conjugates deposited on the electrode surface with good electrical conductivity, thereby contributing a “signal-down” electrochemical response with a double signal enhancement. The detection limit was 0.12 ng/mL in the detection range of 0.5 – 200 ng/mL. This work provided a new and simple way to synthesize MOFs with high substrate affinity and efficient activity, and a general signal amplification strategy induced by the catalytic deposition.
研究领域:
材料科学
·
分析化学
·
生物传感器
·
催化
✓ 已验证
产品关联
DOI
高影响因子
Energy & Environmental Science
·
2018
·Vol. 12
·期 1
·194-205
·
IF 30.067
Jin-Qi Xie,Ya-Qiang Ji,Jia-Hui Kang,Jia-Li Sheng,Da-Sha Mao,Xian-Zhu Fu,Rong Sun,Ching-Ping Wong
Although integrated energy storage devices, such as in-plane micro-supercapacitors (MSCs), are attractive for powering portable microelectronic devices, it is still challenging to develop patterning techniques with high practicability and to rationally design and fabricate electrochemically active materials using feasible procedures. Here, we propose a facile solution-immersion method of fabricating interdigitated copper electrodes with an in situ converted array of Cu(OH)2@FeOOH nanotubes (NTs). A copper current collector can be patterned together with widely employed copper circuits by a facile copper-patterning approach based on cost-effective electroless catalytic deposition of copper with patterned Ag catalysts, which is greatly conducive to the integration of in-plane energy storage devices into microelectronic systems. Furthermore, the rationally designed array of Cu(OH)2@FeOOH NTs, which was converted in situ from the patterned copper electrodes, was demonstrated to be an excellent electrochemically active material with advantages that included a porous structure with a large specific surface area, excellent wettability by the electrolyte, short ion diffusion lengths and one-dimensional electron transport pathway. The resulting MSC devices that were fabricated with the interdigitated Cu(OH)2@FeOOH/Cu electrodes exhibited a high specific capacitance (58.0 mF cm−2 at 0.1 mA cm−2), a high energy density (18.07 μW h cm−2), excellent cycling stability and desirable flexibility.
研究领域:
材料科学
·
电化学
·
纳米技术
·
储能设备
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITE INTERFACES
·
2025
·
IF 2.4
Yan Sun,Maryam Mudasir,Ye Qian
The Ultra-High Molecular Weight Polyethylene (UHMWPE) fibers are significantly considered for Fiber-Reinforced Cementitious Composites (FRCC) development due to their excellent tensile strength and elastic modulus. However, due to the hydrophobic nature of the fibers, strong fiber-matrix interfacial bonding is still challenging. Mussel-inspired polydopamine coating has gained attention for its ability to preserve the fiber’s tensile strength while also serving as a platform for bi-layer applications. Polymerization through auto-oxidation of dopamine monomer proceeds very slowly, taking 12 to 24 h minimum for an efficient film formation. This study suggests an expeditious and feasible strategy to convert hydrophobic UHMWPE fibers into hydrophilic ones using catalytic polydopamine deposition mechanism. The reaction time was reduced by 75–88% while still achieving the desired surface properties. Following, a nanoclay coating procedure was developed for modified fibers. Water contact angle, SEM-EDX, XPS, and FTIR analysis were conducted, revealing enhanced wettability, varied surface morphology, and the presence of new functional groups in the modified fibers, respectively. The FRCC using coated fibers showed improved mechanical performance under tensile loads in terms of first-cracking strength, ultimate tensile strength, and strain capacity compared to uncoated fibers FRCC. Thus, quick strategies were explored for PDA and nanoclay coated surfaces considering strong fiber-matrix bridging in FRCC.
研究领域:
材料科学
·
高分子科学
·
土木工程
·
表面工程
·
复合材料
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）