APPLIED SURFACE SCIENCE
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2019
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IF 5.155
Anish Bhattacharya,Xiangfeng Chu,Qi Gao,Xue Li,Yongping Dong,Shiming Liang,Amit K. Chakraborty
Ethanol sensing is an important area of research given its relevance to human health, traffic control and various industries. Metal oxide semiconductor nanostructures are most commonly used as gas sensors. In this study, enhanced ethanol sensing properties were obtained by incorporation of Gd 3+ ions into Barium Stannate (GBSO), a bimetallic oxide microrods prepared through a simple co-precipitation method. The GBSO films, when exposed to ethanol, showed that incorporation of Gd improved the sensing response till 3 wt% of Gd (3GBSO) loading while further increase in Gd content resulted in reduced response. 3GBSO sample showed response as high as 76 to 500 ppm of ethanol vapor at an operating temperature of 220 °C along with a very low detection limit of 0.1 ppm (response of 1.5). Good repeatability and moderate stability were also observed suggesting its potential as low-cost ethanol sensor. Significant increase in both specific surface area as well as oxygen content (as measured by x-ray photoelectron spectroscopy) was observed in 3GBSO sample compared to that of BSO. Thus, we showed that incorporation of Gd improved the surface area of BSO microrods and in turn the surface adsorption of oxygen which led to their enhanced response to ethanol.
研究领域:
材料科学
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
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2021
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IF 4.311
Zhirong Yang,Yao Shi,Yan Lin,Li Luo,Nan Song,Jianyang Lin,Chong Peng,Baokuan Sui,Jing Zhang,Gang Qian,Xinggui Zhou,Xuezhi Duan
Regulation of pore hierarchy has been an important subject in the design of industrial catalysts. Synthesis of alumina without template/additive often results in poor control of morphologies, porosities, and metal dispersion thereafter. Herein, alumina microrods with a tailored pore hierarchy (Rod2) were fabricated without template/additive by tuning the pore structure of the synthetic precursors, which were used as supports of Pt for n -heptane reforming. Improved toluene selectivity was observed at low space velocities as a result of promoted dehydroisomerization of pentacyclic hydrocarbons, presumably due to a combined effect of the desired pore hierarchy and rod morphology. The Pt/Rod2 also showed better resistance to carbon deposition while maintaining good metal dispersion, as compared to alumina supports with spherical morphology or uncontrolled pore hierarchy. The simulation results revealed that the improved toluene selectivity of Pt/Rod2 is attributed to the proper pore combination of meso -pore1 (6–40 nm) and meso -pore 2 (40–300 nm).
研究领域:
催化化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
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2016
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IF 4.803
Han Song,Lu Zhang,Feng Yu,Bang-Ce Ye,Yingchun Li
We describe here an ultrasensitive electrochemical detection of metronidazole (MNZ) by using a freestanding Au-Ag alloy microrod (AMR) as working electrode. Nanoporous Au-Ag AMR (NPAMR) was facilely prepared by dealloying of smooth AMR and further modified with electropolymerized molecularly imprinted polymer (MIP), which affords simultaneous identification and quantification of the target molecules by cyclic voltammetry (CV) with Fe(CN) 6 3−/4− as probe to indicate the current intensity. The MIP-decorated NPAMR showed a remarkably low detection limit of 2.7 × 10 −14 M (S/N = 3) and a wide determination range from 8.0 × 10 −14 to 1.0 × 10 −6 M for MNZ. The developed sensor has been successfully applied in detection of MNZ in real samples (fish tissues and drug tablet), and admirable specificity and anti-interference capability were achieved. This protocol offers great promise for cost-effective and precisely quantitative analysis of trace biological and chemical substances without assistance of any extra working electrode.
研究领域:
分析化学
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材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2025
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IF 16
Ziang Li,Jincheng Tang,Liang Zhou,Jiannan Mao,Wei Wang,Ziyan Huang,Lichen Zhang,Jie Wu,Xinzhao Jiang,Zhouye Ding,Kun Xi,Feng Cai,Yong Gu,Liang Chen
The extracellular matrix (ECM) stores signaling molecules and facilitates mechanical and biochemical signaling in cells. However, the influence of biomimetic “rejuvenation” ECM structures on aging- and degeneration-related cellular activities and tissue repair is not well understood. We combined physical extrusion and precise “on–off” alternating cross-linking methods to create anisotropic biomaterial microgels (MicroRod and MicroSphere) and explored how they regulate the cell activities of the nucleus pulposus (NP) and their potential antidegenerative effects on intervertebral discs. NP cells exhibited aligned growth along the surface of the MicroRod, enhanced proliferation, and reduced apoptosis. This suggests an adaptive cellular response involving adhesion and mechanosensing, which causes cytoskeletal extension via environmental cues. NP cells maintain nuclear membrane integrity through the YAP/TAZ pathway, which activates the cGAS-STING pathway to rectify the aging mechanisms. In vivo, MicroRod carries NP cells and reduces inflammatory factor and protease secretion in degenerated intervertebral discs, inhibiting degeneration and promoting NP tissue regeneration. Our findings highlight the role of mechanical stress in maintaining cellular activity and antiaging effects in harsh environments, providing a foundation for further research and development of antidegenerative biomaterials.
研究领域:
生物材料
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组织工程
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力学生物学
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细胞衰老
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退行性疾病
✓ 已验证
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2019
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IF 6.393
Yuanyuan Dong,Jinming Li,Lei Zhang
Epinephrine (EP) is a catecholamine neurotransmitter produced from l -tyrosine (L-TY), which usually coexists with each other in biological fluids. Moreover, their abnormal concentrations are related to multiple diseases, so sensitive simultaneous determination of EP and l -TY is important. Herein, we delicately designed 3D SnS@Co ,N- C hierarchical hollow microrod assembled from 2D SnS nanoplates vertically anchored on the MOF derived cobalt, nitrogen co-doped carbon rod (Co ,N- C) as electrode materials using one-step hydrothermal method, followed by thermal annealing in N 2 , and accompanying sequential phase transformation (2D SnS 2 nanoplates in-situ reduced to SnS phase). Obtained hierarchical hollow carbon microrod with beneficial heteroatom doped not only provided sufficient electroactive sites, but also increased the conductivity of the materials. As-fabricated strongly coupled 3D SnS@Co ,N- C microrod displayed enhanced electrochemical performance, offering highly sensitive sensing responses toward biomolecules EP and L-TY. Differential pulse voltammetry (DPV) study indicated that the sensor offered wide linear ranges of 0.01–300.0 and 0.01–250.0 μmol/L, and low detection limits of 3.3 and 3.1 nmol/L for EP and L-TY respectively. The constructed sensor was successfully applied to monitor simultaneously EP and L-TY in milk, human urine and serum samples with high accuracy and reliability.
研究领域:
材料科学
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生物医学工程
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分析化学
✓ 已验证
DOI
高影响因子
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