Nano Research
·
2022
·Vol. 16
·期 4
·5383-5390
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IF 10.269
Mao Guobin,Yang Yang,Cao Shijie,Ye Silu,Li Yifang,Zhao Wei,An Hongwei,Liu Yingxia,Dai Junbiao,Ma Yingxin
The global pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) virus has necessitated rapid, easy-to-use, and accurate diagnostic methods to monitor the virus infection. Herein, a ratiometric fluorescence enzyme-linked immunosorbent assay (ELISA) was developed using Si-fluorescein isothiocyanate nanoparticles (FITC NPs) for detecting SARS-CoV-2 nucleocapsid (N) protein. Si-FITC NPs were prepared by a one-pot hydrothermal method using 3-aminopropyl triethoxysilane (APTES)-FITC as the Si source. This method did not need post-modification and avoided the reduction in quantum yield and stability. The p-nitrophenyl (pNP) produced by the alkaline phosphatase (ALP)-mediated hydrolysis of p-nitrophenyl phosphate (pNPP) could quench Si fluorescence in Si-FITC NPs via the inner filter effect. In ELISA, an immunocomplex was formed by the recognition of capture antibody/N protein/reporter antibody. ALP-linked secondary antibody bound to the reporter antibody and induced pNPP hydrolysis to specifically quench Si fluorescence in Si-FITC NPs. The change in fluorescence intensity ratio could be used for detecting N protein, with a wide linearity range (0.01–10.0 and 50–300 ng/mL) and low detection limit (0.002 ng/mL). The concentration of spiked SARS-CoV-2 N protein could be determined accurately in human serum. Moreover, this proposed method can accurately distinguish coronavirus disease 2019 (COVID-19) and non-COVID-19 patient samples. Therefore, this simple, sensitive, and accurate method can be applied for the early diagnosis of SARS-CoV-2 virus infection.
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PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 25
·19947-19957
·
IF 2.779
Zhang Yu-Rui,Gao Yuan,Zheng Quan-Hao,Zhang Ting-Ting,Qiu Li-Peng,Gao Shi-Long,Zhang Xue-Tong,Han Wen-Peng,Long Yun-Ze
This work reports the superior properties of flexible multi-functional composite fibers based on graphene aerogel fibers. With the addition of phase change materials, the graphene aerogel fibers were synthesized by wet spinning and supercritical drying. The phase change materials can improve the structural uniformity and thermal stability of the composite fibers. The fibers coated with polydimethylsiloxane and fluorocarbon can respond to various external stimuli (e.g., electrons, photons, and heat), as well as have excellent properties of shape compliance, self-cleaning, and insulated surfaces. After coating fluorocarbon, the maximum water contact angle of graphene aerogel fibers increases from 132.18° to 151.77°. It is worth mentioning that adding an insulation layer of polydimethylsiloxane avoids the high-temperature problem caused by the short circuit of graphene aerogel fibers. The short-circuit temperature of graphene aerogel fibers is as high as 65 °C, while that of the composite fiber is only 41.5 °C after coating with polydimethylsiloxane. The temperature of graphene aerogel fibers with polyethylene glycol can increase to 39.3 °C under simulated sunlight. In addition, graphene aerogel fibers have excellent electrical conductivity (4.85 × 10 3 S m −1 ) at 300 K. After coating with polyethylene glycol, its electrical conductivity is still as high as 2.95 × 10 3 S m −1 . The good electrical conductivity makes the aerogel fibers have promising application in advanced wearable systems.
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JOURNAL OF APPLIED ELECTROCHEMISTRY
·
2022
·Vol. 52
·期 11
·1617-1628
·
IF 2.925
Chen Jinyang,Huang Xiaozhou,Ye Ruihong,Huang Dihui,Wang Yanjun,Chen Sheng
A series of conductive metal–organic frameworks (M-CATs) were synthesized using 2,3,6,7,10,11-hexahydroxytriphenylas a ligand following a solvothermal method, and the Cu-CAT system exhibiting the best performance was identified. Conductive Cu-CAT-anchored reduction graphene oxide composites (Cu-CAT@rGO) were prepared following a hydrothermal method. The microstructures of the systems were further characterized using X-ray diffraction, scanning electron microscopy, energy dispersion spectroscopy, and transmission electron microscopy techniques. The drip-casting membrane method was used for the fabrication of a novel electrochemical sensor based on the conductive Cu-CAT-anchored rGO (Cu-CAT@rGO/GCE). The electrochemical performance of Cu-CAT@rGO/GCE was studied using electrochemical impedance spectroscopy and cyclic voltammetry techniques. The differential pulse voltamme try technique was used for electrochemical sensing to detect the content of bisphenol A (BPA) in beverage bottles. An excellent linear detection range (0.05–100 µmol L −1 ) and a low detection limit (4.9 nmol L − 1 ; based on S/N = 3) were recorded. Therefore, this method can potentially be used to develop a new route for the detection of BPA. Graphical abstract
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高影响因子
ANALYTICAL SCIENCES
·
2022
·Vol. 38
·期 11
·1385-1394
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IF 1.967
Gao Yueying,Wan Yuqi,Liu Lin,Liu Jinghan,Li Jingkun,Li Yu,Ozaki Yukihiro,Pi Fuwei
Based on the Lewis acid’s coordination principle, a surface-enhanced Raman scattering (SERS) chip strategy had been developed for the ultrasensitive quantitation of SO 4 2− . Through the immobilization of silver nanoparticles (Ag NPs) and the construction of the boric acid-based sensing unit, the chip system displayed outstanding merits on the direct sensing of SO 4 2− , e.g., simple operation, ultra-high sensitivity, reproducibility, excellent selectivity and specificity. Moreover, an accurate evaluation was obtained by ratiometric calculations on characteristic peaks (1382 and 1070 cm −1 ) for quantitative detection of SO 4 2− . The detection limit was down to 10 nM. Tap water, beer, and mineral water samples were tested, and high recoveries were achieved (97.12–110.12%). Besides, such SERS chip also displayed strong applicability for the evaluation of SO 3 2− . Therefore, this SERS chip provided a promising idea for the quantification of trace amounts of SO 4 2− and SO 3 2− in the fields of food safety and environmental monitoring. Graphical abstract
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高影响因子
CELLULOSE
·
2022
·Vol. 29
·期 14
·7629-7647
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IF 6.123
Shen Chengpeng,Hu Chuanshuang,Zhang Weiwei,Lin Xiuyi,Qi Wei,Zhang Zhen,Gu Jin
Abstract Exploring environmentally benign and economic methods for the preparation of nanocelluloses with controllable morphology would promote their industrial production and utilization. Herein, cellulose I and II nanocrystals (CNC I and CNC II) of rod and sphere shapes were prepared directly from microcrystalline cellulose (MCC, cellulose I) via treatment by acidified zinc chloride molten salt hydrates. Upon adding a small amount of HCl (0.50/0.75/1.0 M) to ZnCl 2 (55/60/65%), the levels of cellulose swelling and hydrolysis could be tuned. Rod-like CNCs I (length: 181.3–279.3 nm) were obtained with 55% ZnCl 2 . Rod-like CNCs with size reduction along with spherical CNCs were produced as ZnCl 2 concentration increased to 60%. Further raising the ZnCl 2 concentration to 65% resulted in CNC II with exclusively spherical shape (diameter: 25.8–292.3 nm). Under the same ZnCl 2 concentration, CNCs produced with high HCl concentration exhibited improved crystallinity (up to 68.4%) and thermal stability (T max up to 343.5 °C). Furthermore, spherical CNC II displayed excellent suspension stability and emulsifying ability to stabilize oil/water Pickering emulsions. The best one stabilized 26% more emulsion volume than the commercially available CNCs and the emulsions showed shear and heat stability. Therefore, this study provides a sustainable method for production of CNCs with tailored characteristics and broad application potentials. Graphical abstract
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Friction
·
2022
·Vol. 11
·期 7
·1138-1149
·
IF 4.924
Liu Wenrui,Wang Hongdong,Liu Yuhong
Polyalkylene glycol (PAG) aqueous solutions have recently been demonstrated to exhibit an ultralow friction coefficient (COF, μ < 0.01). However, the prolonged running-in period and low bearing capacity have limited its widespread application. In this study, we determined that the running-in period can be decreased by more than 75% when the pH value of the lubricant is controlled at 3 by introducing various acid solutions. Additionally, less time was required to realize stable superlubricity with inorganic acid at lower pH values. This was mainly attributed to the acceleration effect of hydrogen ions around the contact region. In case of PAG aqueous solution with organic acid, the wear loss between sliding solid surfaces was reduced, and thus the bearing pressure during the superlubricity period was significantly improved from approximately 30 to 160 MPa. Furthermore, the organic acid molecules were considered to form strong hydrogen bonds with PAG macromolecules and solid surfaces. This in turn strengthened the structure of the adsorption layers. The unique effect of different acids in aqueous polymer lubrication can potentially significantly aid in advancing the study of polymer tribology and broadening industrial applications.
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高影响因子
Journal of Central South University
·
2022
·Vol. 29
·期 6
·1778-1787
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IF 2.392
Zhang Hao,He Qing-song,Tian Cheng-bo,Wu Yu-wei,Zhao Ze-fang,Yu Min
Inspired by the microstructure of gecko’s toe, two kinds of polyvinyl chloride (PVC) gels with different modulus were poured on a silicon mold with micropillars, and then a bio-inspired adhesive with variable modulus was manufactured in this study. The adhesions of variable modulus and fixed modulus bio-inspired adhesives were tested, respectively, on a smooth glass and a printed circuit board (PCB) with different surface structures. The results show that PVC gel bio-inspired adhesives with variable modulus have many advantages compared with the fixed modulus bio-inspired adhesives. The adhesion of variable modulus bio-inspired adhesives on the rough PCB surface increased by 2–5 times, and due to the use of variable modulus of PVC gel, the surface micropillars can maintain high aspect ratio and flexible tips at the same time. Moreover, the use of PVC gel makes it easier to demold during the bio-inspired adhesives preparation. An adhesion-desorption device was made according to the movement of the gecko toes, and the PCB was successfully grasped.
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Nano-Micro Letters
·
2022
·Vol. 14
·期 1
·1-13
·
IF 23.655
Li Xiaotong,Wang Jianghao,Lv Xiangzhou,Yang Yue,Xu Yifei,Liu Qian,Wu Hao Bin
Dual-site electrocatalysts with in situ formed metal-oxide interfaces are proposed and demonstrated to enhance the formation of multi-carbon products from electrochemical CO 2 reduction.
The 0.5-UiO/Cu delivers a high C2+ Faradaic efficiency of over 74% with notably boosted formation rate and durability, surpassing most reported electrocatalysts.
A unique mechanism of UiO-66 to induce in situ reconstruction of Cu surface and formation of UiO-66-derived amorphous ZrO x /Cu interface is uncovered, which improves the selectivity and productivity toward C2+ products.
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高影响因子
npj Flexible Electronics
·
2022
·Vol. 6
·期 1
·1-9
·
IF 12.019
Zhang Chao,Zhang Chi,Wu Xinyue,Ping Jianfeng,Ying Yibin
Plant wearable sensors have potential to provide continuous measurements of plant physiological information. However, stable and high-fidelity monitoring of plants with glandular hairs and wax is challenging, due to lacking interface adaptability of conventional plant wearable sensors. Here, inspired by adaptive winding plant tendrils, an integrated plant wearable system (IPWS) based on adaptive winding strain (AWS) sensor for plant pulse monitoring was developed. The IPWS consists of three modules, i.e. an AWS sensor, a flexible printed circuit, and a smart phone APP display interface. As the key element, the AWS sensor can adaptively wrap around the tomato stem. Importantly, with the serpentine-patterned laser-induced graphene, the AWS sensor exhibits excellent resistance to temperature interference with a temperature resistance coefficient of 0.17/°C. The IPWS is demonstrated to be stable and high-fidelity monitoring the plant pulse, which can reflect the growth and water state of tomato plant in real time.
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高影响因子
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
·
2022
·Vol. 194
·期 11
·5220-5235
·
IF 3.094
Qiu Weihua,Liu Jinru
Bio-depolymerized the lignin macromolecules into low molecular lignin-derived aromatic compounds satisfies the requirement for carbon dioxide peaking and is also one of the important ways to realize lignin valorization. Coriolopsis trogii is a kind of less reported lignin-degrading white-rot fungus. The degradability of a self-isolated C. trogii TS01 on industrial lignins, including enzymatic hydrolysis lignin (EHL) and Kraft lignin (KL), was investigated in this paper. The results indicated that EHL could be used as an efficient carbon source to promote the cell growth and ligninolytic enzyme secretion of C. trogii TS01. Compared with using 2% glucose as carbon source, 1% EHL plus 1% glucose would increase the maximum cell dry weight, laccase activity, and manganese-dependent peroxidase activity of C. trogii TS01 by 24.8%, 164.1%, and 200%, respectively. However, the cell growth and ligninolytic enzyme secretion would be significantly inhibited in the case of 1% KL plus 1% glucose used as carbon source. As a result, at the 12th day of fermentation, the degradation rates of EHL and KL were 50.6% and 5.7%, respectively. The UV and FTIR analysis indicated that after been fermented by C. trogii TS01, S-unit content in EHL was decreased by 12.5% but G-unit content was increased by 53.7%. In conclusion, the research of this paper will provide a promising solution for the valorization of enzymatic hydrolysis lignin since the high biodegradation rate of lignin and high activity of ligninolytic enzymes could be achieved simultaneously.
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高影响因子
Journal of Sustainable Metallurgy
·
2022
·Vol. 8
·期 3
·1117-1129
·
IF 3.068
Lu Xingwen,Zhou Ceng,Liu Yuxin,Wang Yujie,Wang Fei
In this study, iron tailings were used as raw materials mixing with Al 2 O 3 , SiO 2 , and/or CaO sintered at 950–1400 °C to produce glass ceramics. In Al 2 O 3 /tailing and Al 2 O 3 /SiO 2 /tailing systems, the newly formed crystalline mullite (3Al 2 O 3 ·2SiO 2 ) reached its maximum content of 83.7 wt% for sample with Al 2 O 3 /SiO 2 /tailing mass ratio of 6/2/2. In Al 2 O 3 /SiO 2 /CaO/tailing system, the content of newly formed anorthite (CaAl 2 Si 2 O 8 ) increased to the maximum of 72.9 wt% for sample with Al 2 O 3 /SiO 2 /CaO/tailing mass ratio of 7/8/4/6 sintered at 1450 °C. The properties of glass ceramic products were significantly improved in samples with high content of crystalline mullite or anorthite and low surface porosity. Obtained glass ceramic in Al 2 O 3 /SiO 2 /tailing system with mass ratio of 6/2/6 showed excellent properties of chemical resistance (99.99%), compressive strength (1061.6 MPa), and low water absorption (0.2%). The high performance of glass ceramics and low leachability of hazardous metals shed light on the potential application of iron tailings in building and decorative materials. Graphical Abstract
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2022
·Vol. 33
·期 19
·15520-15532
·
IF 2.779
Zhang Xiaoyan,Yang Xu,Wang Zhaopeng,Pan Qi,Chu Baojin,Zuo Ruzhong
Our previous work proposed that except for ferromagnetic and piezoelectric properties, mechanical quality factor is also an important parameter for high magnetoelectric response of BiFeO 3 -based multiferroic ceramics. In this work, in order to improve the mechanical quality factor of BiFeO 3 -based ceramics and obtain higher magnetoelectric response, we use Mn as a dopant and prepare 0.75BiFe 1− x Mn x O 3 -0.25BaTiO 3 ( x = 0, 0.0025, 0.005, 0.0075, 0.01) ceramics. The dielectric, piezoelectric, magnetic, and magnetoelectric properties of the ceramics with different Mn doping levels and different sintering temperatures are studied comprehensively. We find that the piezoelectric response, mechanical quality factor, ferromagnetic property, and magnetoelectric response can be improved by optimization of the composition and sintering temperature of the ceramics. A large magnetoelectric coefficient α E \(\sim\) 2 V/(cm Oe) is achieved at resonant frequency when doping content of Mn is 0.75 mol% and sintering temperature is 1030 \(\mathrm{^\circ{\rm C} }\) . Such high value of α E is attributed to the combined effect of improved mechanical quality factor, high piezoelectric coefficient, and enhanced ferromagnetism. It is among the largest α E values obtained in single-phase BiFeO 3 -based ceramics. Moreover, our work further verifies the mechanical quality factor is an important parameter to achieve a high magnetoelectric response in BiFeO 3 -based ceramics.
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