INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
·
2021
·
IF 1.986
Yuze Li,Lingwei Meng,Zhengzhou Li,Yiran Wang,Xiao Wang,Huihui Liu,Caiqiao Xiong,Zongxiu Nie
Miniaturization of ambient ionization source is of great importance to the popularization of mass spectrometry . However, current ambient ionization sources are typically connected to several accessory equipment such as high voltage power supply, gas cylinders, and injection pumps. We report hand-powered ionization methods for mass spectrometric detection of small molecules based on a piezoelectric element that transforms hand mechanical energy into electrical energy. The piezoelectric element only weighs 39 g and lengths 9 cm, and no extra accessory equipment is needed. Paper spray , nanoelectrospray, and pin-to-funnel discharge powered by the piezoelectric elements were achieved, and several small molecule standards, including drugs, herbicides, etc., were detected and confirmed using these devices with a benchtop mass spectrometer . In addition, terbuthylazine (a herbicide) on the surface of a tomato was detected using the hand-powered pin-to-funnel discharge coupled with a miniature mass spectrometer , which indicates a potentially broader application of these methods in the on-site detection field. The methods described here are low-cost, user-friendly, miniatured, and versatile. Although efforts are still needed for the improvement of the performance, the piezoelectric element shows the alternative pathway of the miniaturization of ambient ionization.
研究领域:
分析化学
·
质谱学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Fei Xie,Huan Liu,Minyu Bai,Shuai Wen,Fang Xu,Jijie Zhao,Weiguo Liu
Flexible electronics are usually fabricated using stretchable or foldable materials, whereas these materials have no predominance in miniaturization of high-frequency flexible electronics because of low permittivity. In effort to scale down dimensions of electronic devices, the use of ferrite ceramic/polymer matrix may offer superiority over conventional dielectric ceramics. Polydimethylsiloxane (PDMS), which exhibits high transparency and stretchability, has emerged as functional or substrate material for high-performance devices, such as RF antenna. Here, to improve high-frequency magnetic-dielectric properties of PDMS matrix, a high-performance LiZnTiMn (LZTM) ferrite is synthesized and added in the PDMS matrix. We demonstrate, through magnetic, dielectric spectra and elasticity test, a flexible 3L/PDMS composites ( f = 1.0 GHz, μ r = 2.87, ε r = 6.51, tanδ μ = 0.55, tanδ ε = 0.015) was prepared by using mechanical mixing method. Moreover, the elastic modulus and miniaturization factor (n) of the flexible composite are 16.78 MPa and 4.32@1.0 GHz, respectively. The present results provide a reference connecting flexible electronic and RF devices, and offer experience on how to enhance high-frequency performance of polymer-matrix based on ceramic material.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Tingting Tang,Fangqing Ye,Huang Hua,Chaoyang Li,Jian Shen
With the rapid development of 5G communication technology, microwave dielectric ceramics with high dielectric constants are very conducive to the miniaturization of passive devices. Here, Ba3Ti4–x(Ni1/3Nb2/3)xNb4O21 (BTN ∼ NN, 0.03 ≤ x ≤ 0.15) ceramics with hexagonal phases are synthesized via the solid-phase route. The composite (Ni1/3Nb2/3)4+ ion substitution strategy can substantially improve the microwave dielectric properties of the Ba3Ti4Nb4O21 (BTN) ceramic. The εr and Q × f values depend on the ionicity (Nb–O bonds) and lattice energies (Nb(1)–O3 and Nb(1)–O2(1) bonds). The microwave dielectric properties of the BTN ∼ NN (x = 0.09) ceramic sintered at 1250 °C are εr = 60.3, Q × f = 22073 GHz, and τf = 78.1 ppm/°C. A miniaturized all-ceramic radome (@400 mm × 400 mm × 8 mm) for 5G beam-splitting function is designed and demonstrated using this ceramic. Compared to other radomes designed for other work utilizing low εr, the size of this radome has been reduced by 3/7. The reflection coefficients of the beam splitting function are all 0.73, and the phase shifts are all 360°. This work contributes to the development of miniaturized passive devices from a materials point of view.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2020
·Vol. 104
·期 5
·2125-2133
·
IF 3.502
Naichao Chen,Bin Xiao,Xinwei Xu,Tao Sun,Fei Jin,Meiyu Chen,Xianqiang Chen,Hong Wang
(1- x )Na 2 WO 4 – x Ni 0.2 Cu 0.2 Zn 0.6 Fe 2 O 4 (NWO-NCZO) ceramic composites ( x = 0–0.6) were successfully prepared by the cold sintering method under a uniaxial pressure of 200 MPa at 150°C for 30 min. The microstructures and electromagnetic properties of (1- x )NWO- x NCZO ceramic composites with different NCZO contents have been systematically investigated. The obtained biphasic NWO-NCZO ceramic composites possess dense microstructures. The 0.4NWO–0.6NCZO ceramic composite exhibits a matched relative permittivity and relative permeability of around 8 in the frequency range from 10 to 200 MHz, which is beneficial for impedance matching between antenna and free space. A prototype of microstrip antenna based on the developed NWO-NCZO ceramic composite is designed and to demonstrate its application in miniaturized antennas. The simulation results revealed that the size of the radiation patch of the antenna can be reduced by 60% yet with bandwidth being enhanced 26.5 times when the 0.4NWO–0.6NCZO ceramic composite is selected as the substrate instead of pure NWO ceramic.
研究领域:
材料科学
·
电磁工程
·
陶瓷工程
✓ 已验证
DOI
高影响因子
Communications Chemistry
·
2024
·Vol. 7
·期 1
·1-11
·
IF 5.9
Yang Yiming,Sun Shuang,Yang Shuyuan,Yang Qin,Lu Xinqiong,Wang Xiaohao,Yu Quan,Huo Xinming,Qian Xiang
Structural annotation of small molecules in tandem mass spectrometry has always been a central challenge in mass spectrometry analysis, especially using a miniaturized mass spectrometer for on-site testing. Here, we propose the Transformer enabled Fragment Tree (TeFT) method, which combines various types of fragmentation tree models and a deep learning Transformer module. It is aimed to generate the specific structure of molecules de novo solely from mass spectrometry spectra. The evaluation results on different open-source databases indicated that the proposed model achieved remarkable results in that the majority of molecular structures of compounds in the test can be successfully recognized. Also, the TeFT has been validated on a miniaturized mass spectrometer with low-resolution spectra for 16 flavonoid alcohols, achieving complete structure prediction for 8 substances. Finally, TeFT confirmed the structure of the compound contained in a Chinese medicine substance called the Anweiyang capsule. These results indicate that the TeFT method is suitable for annotating fragmentation peaks with clear fragmentation rules, particularly when applied to on-site mass spectrometry with lower mass resolution.
研究领域:
分析化学
·
人工智能
·
生物信息学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2020
·
IF 4.495
Naichao Chen,Bin Xiao,Xinwei Xu,Tao Sun,Meiyu Chen,Renchao Hu,Xinglei Deng,Xianqiang Chen,Hong Wang
In this paper, (1- x )Li 2 MoO 4 (LMO)- x Ni 0.2 Cu 0.2 Zn 0.6 Fe 2 O 4 (NCZO) ceramic composites were consolidated using cold sintering method at a temperature of 150 °C, which is far below the sintering temperature of NZFO ceramic-based systems via conventional ceramic preparation method. The phase composition, microstructure, dielectric properties and magnetic properties of the as-cold-sintered LMO-NCZO ceramic composites were studied. The relative density of all composites is larger than 95 % at a cold sintering temperature of 150 °C for 30 min under a uniaxial pressure of 200 MPa. XRD results showed that the composites were only composed of two phases. SEM revealed that the NCZO particles were enwrapped by the LMO phase. The 0.46LMO-0.54NCZO ceramic composite exhibited excellent magnetodielectric properties with an effective permittivity of about 8.3, a dielectric loss of 0.003, a permeability of 7 and a magnetic loss of 0.024 (@10 MHz), which make it potentially applicable in the miniaturization of electronic devices.
研究领域:
材料科学
·
电气工程
·
陶瓷
·
复合材料
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Tingting Tang,Hua Huang,Chaoyang Li,Jian Shen
High performance and miniaturization are becoming increasingly important for practical microwave electronics and high-density communication systems. Here, LiNb 0.6 Ti 0.5- x (Zn 1/3 Nb 2/3 ) x O 3 (LNT- x ZN, x = 0, 2, 4, 6, 8 mol%) ceramics have been successfully prepared by a solid-phase reaction. The relationship between the physical structure, microscopic morphology, Raman spectroscopy , and microwave properties is revealed. The better microwave dielectric properties of the LNT-4ZN ceramic sintered at 1075 °C are ε r ∼59.9, Q× f ∼8261 GHz, and τ f ∼-7.4 ppm/°C. Using this ceramic, a miniaturized dielectric resonant antenna (DRA) is designed and demonstrated. The return loss, radiation efficiency, and realized gain of this device at the center frequency are −43.57 dB, 78.4 %, and 8.59 dB, respectively. The antenna, in addition to the good radiation performance, has a size advantage over similar devices (#Cylindrical sample, # R 3.1 mm × h 1.6 mm, @Square substrate, @ a = b = 18 mm × h 3.1 mm). This work exemplifies the great potential of LNT-4ZN materials in communication devices and promotes the application of microwave dielectric ceramics in antenna fields.
研究领域:
材料科学
·
电气工程
·
微波技术
·
陶瓷
·
天线设计
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Yuhang Guo,Guangzhaoyao Yang,Shiyao Yu,Jing Huang,Fusheng Pan,Runnan Zhang,Haojun Fan,Zhongyi Jiang
Poly (4-methyl-1-pentene) (PMP) is widely used between blood and gas in extracorporeal membrane oxygenation (ECMO). However, it is more suitable to miniaturize the oxygenator from an economic and biosafety standpoint, that necessitates the PMP oxygenation membrane with enhanced gas permeance and hemocompatibility. This study introduced fluorinated covalent organic framework (FCOF) nanofiber into PMP matrix to construct PMP-FCOF hybrid flat sheet membranes and hollow fiber membranes (HFMs) via thermally induced phase separation (TIPS). FCOF exhibits structural and chemical similarity with PMP, ensuring the good compatibility with PMP matrix. The abundant C–F bonds rendered membrane low-surface-energy of ∼30.2 mN m −1 for PMP–FCOF–3 flat sheet membrane, exhibiting better hemocompatibility compared with that of ∼34.4 mN m −1 for the PMP membrane. The fabricated PMP–FCOF–3 HFMs for blood gas exchange with O 2 exchange rate of ∼309.8 mL min −1 m −2 , which was 77.3 % higher than the commercial PMP HFM, and comparable CO 2 exchange rate of ∼251.7 mL min −1 m −2 with commercial PMP HFM. The blood-gas exchange and hemocompatibility were synergistically enhanced by a simple hybrid strategy, exhibiting great application potentials.
研究领域:
生物医学工程
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2022
·Vol. 106
·期 5
·2953-2962
·
IF 4.186
Zhihao Dong,Peiyao Zhao,Zhenyong Cen,Xiaohui Wang
On the road of lead-free piezoelectric ceramics into practical applications, the study of Ni-internal-electrode (K, Na)NbO 3 -based (KNN-based) multilayer actuators (MLAs) is an important part, possessing the advantages of environmentally friendly and low cost. The Ni-internal-electrode KNN-based MLAs with different layer numbers and layer thicknesses were fabricated via the tape casting method and sintered in the reducing atmosphere. The piezoelectric layers consist of the main KNN-based phase and a trace amount of second phase Mn 4 Nb 2 O 9 . The element diffusion between the Ni electrodes and KNN-based grains is tiny, indicating that Ni is suitable for co-firing with KNN-based ceramics. After sintering, the compressive stress perpendicular to the thickness direction and the “relative tensile stress” parallel to the thickness direction are retained in the MLAs, bringing influences on the piezoelectric and dielectric properties of KNN-based materials. Compared with the bulk ceramics, the prepared MLAs significantly reduce the driving voltages and increase the displacement outputs, which are more applicable to the scenarios of miniaturization and portability. Particularly, the 46-layer actuator shows high displacements of 1580 and 2737 nm under the voltages of 100 and 200 V, respectively. However, the inverse piezoelectric coefficient d 33 * for each layer of MLAs is still lower than that of the bulk ceramics, indicating that the piezoelectric properties of the KNN-based materials are suppressed. To give full play to the piezoelectric properties of KNN-based materials, more attentions should be paid to the design of reasonable electrode structure and the development of internal electrode paste for MLAs.
研究领域:
材料科学
·
电陶瓷
·
压电材料
·
致动器
✓ 已验证
DOI
高影响因子
Green Energy & Environment
·
2020
·
IF 6.395
Xiao Yu,Xinyi Zhang,Yongjian Lai,Donghai Wang,Yong Liu
3D electrodes have shown extraordinary promise for electrochemical energy storage devices in wearable electronics. However, it is still a significant challenge to rationally design 3D electrode that has the characteristics of lightweight, flexibility, low cost, high performance and miniaturization. In this work, we present a novel design of 3D electrode by directly growing the nanocrystalline TiO 2 film on carbonized eggshell membrane. The unique architecture can supply not only a continuous electron transport pathway through an interconnected carbon fibrous network but also an efficient electrolyte flux via an interpenetrating porous network. Besides, nanocrystalline TiO 2 film on carbonized eggshell membrane offers a short ion diffusion path in the solid-phase, leading to a rapid kinetic of electrochemical reaction. When tested as an anode for Li-ion battery, TiO 2 film in 3D electrode demonstrated excellent electrochemical performance with a large reversible capacity, excellent rate capacity and long life cycling property.
研究领域:
材料科学
·
电化学
·
能量存储
·
纳米技术
·
可穿戴技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2019
·
IF 2.584
Ya Yang,Suyan Zhai,Chao Liu,Xiaoshu Wang,Yifeng Tu
An ultrasensitive disposable immunosensor based on a gold nanoparticles (AuNPs)/indium tin oxide (ITO) substrate has been constructed to detect ketamine (KET) conveniently. In this study, we obtained a AuNPs/ITO basic electrode by only a two-step ecofriendly drip-coating procedure. The self-assembled monolayers of AuNPs were used as a hetero-bifunctional cross-linker and activator, respectively. Ketamine antibody was used as a biorecognition determinant and immobilized onto the AuNPs/ITO through electrostatic interaction or Au–S or Au–N bonds. The architectures of AuNPs/ITO were characterized by transmission electron microscopy, scanning electron microscopy, cyclic voltammetry, and electrochemical impedance spectroscopy mainly. Electrochemiluminescence (ECL) was used to monitor the specific immune response between the antigen and antibody by measuring changes of intensity in the process of ECL. When the immune complex was incubated on the electrode, it blocked the electron communication and mass transfer, and the ECL signal was quenched. According to the quenched ECL signal, the quantification of KET can be realized. Under optimal conditions, the immunoassay showed a linear range from 10 to 100 pg/g. The low detection limit is 5.73 pg/g. The sensor has been applied to detect ketamine in human hair successfully. In addition, the immunosensor has excellent selectivity, outstanding reproducibility, and acceptable stability. What’s more, the immunosensor exhibits low-cost, simplicity, small sample consumption, and easy miniaturization, which allows it to be integrated into portable platforms to be utilized on the site of crime easily.
研究领域:
分析化学
·
纳米技术
·
法医学
·
生物传感器
✓ 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）