NANOTECHNOLOGY
·
2019
·Vol. 30
·期 32
·325401
·
IF 3.399
Xiaoning Wang,Hongli Wei,Xiuzhi Liu,Wei Du,Xiangjin Zhao,Xiaolin Wang
Combining polyaniline (PANI) with different dimensional carbon materials is an effective way to solve the disadvantages of poor rate performance and cycling stability induced by the structure destruction of conductive polymer materials over long-term charge/discharge cycles. In this work, novel three-dimensional (3D) conical PANI nanothorns are synthesized on a buckypaper substrate via a controlled electropolymerization process. Benefiting from the synergistic effect of the vertical growth of PANI nanothorns and the excellent mechanical elasticity of multi-wall carbon nanotubes, it can effectively alleviate the volume change during the charging and discharging process of the electrode material and ensure the rapid transmission of electrons. The morphology and structure of the composite have been characterized by scanning electron microscopy, x-ray diffraction, and Fourier transform infrared spectroscopy. The results show that the electrode exhibits a high specific capacitance of 742 F g−1 at 1 A g−1 in 1 M of H2SO4 electrolyte and a capacitance retention of 76% after 2000 cycles. The novel 3D PANI nanothorn/buckypaper composite has significant potential as practical for use as electrode materials of supercapacitors due to its easy synthesis, low cost, and high specific capacitance.
研究领域:
材料科学
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能源存储
·
纳米技术
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Zhenxiang Shen,Qiuyue Liu,Qiu Meng,Zhiyong Sun,Yizhen Li,Enze Yu,Yi Shen,Qing Liu,Taotao Ge,Jingguo Li,Jie Yu,Shanqiu Liu
Superhydrophobic surfaces are renowned for their extreme hydrophobicity and versatility, showing great potential in numerous applications. Yet, the complexity of their production and susceptibility to mechanical and chemical degradation significantly limit their practical use. Herein, we introduce a straightforward one-step, solvent-free method for the in situ growth of polysilsesquioxane nanospikes (PNS) on glass microfibers, creating a hierarchical micronano composite material with excellent superhydrophobic properties, evidenced by a water contact angle of approximately 170° and a rolling angle below 3°. This composite exhibits exceptional stability against severe temperatures, humidity, and corrosive substances, including strong acids/bases and organic solvents, maintaining its superhydrophobicity even after repeated mechanical abrasion and oil contamination. Such resilience is attributed to the synergistic effect of its micronano hierarchical structure and the three-dimensional, covalently cross-linked structure of the PNS. Notably, it can easily and rapidly transform between superhydrophobic and superhydrophilic states via simple plasma treatment and surface re-engineering, facilitating its application in the highly efficient (>98%) separation of diverse and complex oil–water mixtures. This work opens promising avenues for applying superwettable surfaces in practical scenarios, especially those demanding durability and adaptability.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2022
·Vol. 33
·期 15
·155705
·
IF 3.953
Xing Zhang,Hao Chen,Wei Zhang,Lina Zhang,Xinyu Liu,Jinwen Ma,Shichong Xu,Haibo Li
Exploring and fabricating a suitable photoanode with high catalytic activity is critical for enhancing photoelectrochemical (PEC) performance. Herein, a novel 3D hierarchical Fe2O3/SnO2 photoanode was fabricated by a hydrothermal route, combining with an annealing process. The morphology, crystal structure were studied by scanning electron microscopy, transmission electron microscopy, x-ray photon spectroscopy, and x-ray diffraction, respectively. The results reveal the successful preparation of Fe2O3 nanothorns on the surface of SnO2 nanosheets. The as-fabricated 3D Fe2O3/SnO2 photoanode yields obviously promoted PEC performance with a photocurrent density of approximate 5.85 mA cm−2, measured in a mixture of Na2S (0.25 M) and Na2SO3 (0.35 M) aqueous solution at 1.23 V (versus reversible hydrogen electrode, RHE). This value of photocurrent is about 53 times higher than that of the bare SnO2 photoanode. The obvious improved PEC properties can be attributed to the 3D Fe2O3/SnO2 heterostructures that offer outstanding light harvesting ability as well as improved charge transport and separation. These results suggest that exploring a suitable 3D hierarchical photoanode is an effective approach to boost PEC performance.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2018
·Vol. 8
·期 4
·265
·
IF 3.504
Zhongbo Li,Kexi Sun,Zhaofang Du,Bensong Chen,Xuan He
Here we report a low-cost synthetic approach for the direct fabrication of large-area Au nanourchin arrays on indium tin oxide (ITO) via a facile galvanic-cell-reaction-driven deposition in an aqueous solution of chloroauric acid and poly(vinyl pyrrolidone) (PVP). The homogeneous Au nanourchins are composed of abundant sharp nanotips, which can served as nanoantennas and increase the local electromagnetic field enhancement dramatically. Finite element theoretical calculations confirm the strong electromagnetic field can be created around the sharp nanotips and located in the nanogaps between adjacent tips of the Au nanourchins. In addition, the interparticle nanogaps between the neighboring Au nanourchins may create additional hotspots, which can induce the higher electromagnetic field intensity. By using rhodamine 6G as a test molecule, the large-area Au nanourchin arrays on ITO exhibit active, uniform, and reproducible surface-enhanced Raman scattering (SERS) effect. To trial their practical application, the Au nanourchin arrays are utilized as SERS substrates to detect 3,3’,4,4’-tetrachlorobiphenyl (PCB-77) one congener of polychlorinated biphenyls (PCBs) as a notorious class of persistent organic pollutants. The characteristic Raman peaks can be still identified when the concentration of PCB-77 is down to 5 × 10−6M.Keywords:surface-enhanced Raman scattering;galvanic cell reaction;Au nanourchins;PCBs
研究领域:
材料科学
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环境科学
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纳米技术
✓ 已验证
DOI
PubMed
高影响因子
MATERIALS & DESIGN
·
2025
·
IF 7.9
Chengduan Yang,Baoming Liang,Shu Zhang,Yao Shen,Cheng Yang,Ziqi Liu,Xiangling Li,Xi Xie,Fanmao Liu,Guozhi Huang,Ji Wang,Hui-jiuan Chen
A wide range of implantable microparticles has been developed for the detection, diagnosis, and treatment of various diseases. However, the risk of complications, such as inflammation, is significantly heightened by undesirable biofouling caused by biological substances, including protein adsorption, bacterial colonization, and cell adhesion. Although slippery lubricant-infused porous substrates (SLIPS) have demonstrated remarkable resistance to biofouling, concerns regarding the safety of their degradation by-products and the stability of lubricants in fluid environments limit their applicability. In this study, we present a novel ‘liquid-like’ coating polydimethylsiloxane (PDMS) brush-modified implantable microparticles that exhibit enhanced stability and durability against biofouling. Our design incorporates both physical nanospikes and chemical PDMS brushes on the surface of microparticles. This modification results in an increased hydrophobicity of the particles while promoting attractive interactions between the ‘liquid-like’ coated surfaces across different microparticle types. The presence of nanospikes facilitates a specific dispersion pattern among PDMS-modified spiky microparticles (PMSMP). The ‘liquid-like’ coating demonstrates reliable biocompatibility and significantly reduces adhesion rates for proteins (1/60), bacteria (1/56), and cells (1/20), maintaining its efficacy over extended periods (>7 days). Our research introduces a groundbreaking anti-biofouling modification technology for deliverable microparticles, offering promising potential implications for developing devices or materials aimed at mitigating inflammation.
研究领域:
生物医学工程
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材料科学
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医学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2017
·Vol. 5
·期 31
·7806-7812
·
IF 5.256
Lin Chen,Ying Huang,Tian Tian Xing,LingPu Ge,Tong Yang,Bin Chen,Cheng Zhi Huang
Facile detection of melamine in milk was realized through a portable multi-channel sensing device using Au nanoparticles with urchin-like structures as sensing probes. The detection mechanism was based on the aggregation of Au nano-urchins, induced by the formation of Au–N bonding with melamine. The Au nano-urchins were synthesized by a seed-mediated growth method in the presence of hydroquinone, which has the localized surface plasmon absorption at about 680 nm. The results showed that the melamine detection was environment pH dependent. The optimal melamine detection condition occurred when the pH of the BR buffer was 5.72. A better selectivity to melamine was fulfilled when compared with its structurally similar compounds: cytosine, uracil, and thymine. The multi-channel sensing device has a detection limit of 18 nM for melamine in milk, which could meet the requirement for monitoring the melamine amount in milk.
研究领域:
分析化学
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食品科学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Interfaces
·
2023
·Vol. 10
·期 21
·2300208
·
IF 5.4
Chenglin Qing,Wenwen Han,Hui Zeng,Peng Jin,Yufeng Wang,Yunlong Guan,Ziming Guo,Yingxia Yang,Li Guan,Gaofeng Deng,Dalong Li
Bacteria are difficult to be eliminated because of their multi-drug resistance, which brings significant threats to public health. Among the antibacterial methods, mechanobactericidal surfaces provide a possible approach to solving this problem. In this study, a generally used mechanical sterilization is developed by fabricating a nanostructured coating. The functional coating is simply fabricated by growing zeolitic imidazolate frameworks (ZIFs, ZIF-8 mixed with ZIF-67) nanospikes on the surface of the fabric substrate in situ. The fabricated ZIF nanospikes are stable and effective, with the sterilization efficiency approaching 99.9999%. This technique provides a fast, safe, and low-cost antibacterial method without drug resistance, which can be potentially used in hospitals, emergency treatments, and superbug protection in the future.
研究领域:
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Songliang Liu,Ziqiang Wang,Hugang Zhang,Shengqi Wang,Peng Wang,You Xu,Xiaonian Li,Liang Wang,Hongjing Wang
Controllable preparation of palladium-based nanomaterials is of great significance for electrochemical ammonia synthesis. Herein, a micelle-assisted replacement strategy was reported for the in situ synthesis of palladium nanothorn assembly array on Ni foam (Pd NTA-NF), in which NF behaves as a conductive substrate and reducing agent. Owing to the nanothorn assembly structure and binder-free property, Pd NTA-NF directly acts as a highly efficient electrode for nitrogen reduction reaction. Therefore, Pd NTA-NF obtains excellent activity (NH3 yield: 5.45 μg h–1 cm–2), faradaic efficiency (20.01%), and stability under neutral conditions. The synthetic approach offers an efficient and valuable approach for growing self-assembled noble metal arrays on NF, which have high potential for electrochemical nitrogen reduction to ammonia and other electrocatalytic fields.
研究领域:
材料科学
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电化学
·
催化
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Bioactive Materials
·
2020
·
IF 8.724
Yingde Xu,Xiangmei Liu,Yufeng Zheng,Changyi Li,Kelvin Wai Kwok Yeung,Zhenduo Cui,Yanqin Liang,Zhaoyang Li,Shengli Zhu,Shuilin Wu
Both phototherapy via photocatalysts and physical puncture by artificial nanostructures are promising substitutes for antibiotics when treating drug-resistant bacterial infectious diseases. However, the photodynamic therapeutic efficacy of photocatalysts is seriously restricted by the rapid recombination of photogenerated electron–hole pairs. Meanwhile, the nanostructures of physical puncture are limited to two-dimensional (2D) platforms, and they cannot be fully used yet. Thus, this research developed a synergistic system of Ag 3 PO 4 nanoparticles (NPs), decorated with black urchin-like defective TiO 2 (BU–TiO 2-X /Ag 3 PO 4 ). These NPs had a decreased bandgap compared to BU-TiO 2-X , and BU-TiO 2-X /Ag 3 PO 4 (3:1) exhibited the lowest bandgap and the highest separation efficiency for photogenerated electron–hole pairs. After combination with BU-TiO 2-X , the photostability of Ag 3 PO 4 improved because the oxygen vacancy of BU-TiO 2-X retards the reduction of Ag + in Ag 3 PO 4 into Ag 0 , thus reducing its toxicity. In addition, the nanospikes on the surface of BU-TiO 2-X can, from all directions, physically puncture bacterial cells, thus assisting the hybrid's photodynamic therapeutic effects, alongside the small amount of Ag + released from Ag 3 PO 4 . This achieves synergy, endowing the hybrid with high antibacterial efficacy of 99.76 ± 0.15% and 99.85 ± 0.09% against Escherichia coli and Staphylococcus aureus , respectively, after light irradiation for 20 min followed by darkness for 12 h. It is anticipated that these findings may bring new insight for developing synergistic treatment strategies against bacterial infectious diseases or pathogenic bacterial polluted environments.
研究领域:
材料科学
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纳米技术
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生物医学工程
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微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2021
·
IF 6.986
Shu-Ting Xu,Cheng Yang,Xiu-Ping Yan
Mass spectrometry combined with flow cytometry is emerging for high-throughput single-cell metabolite analysis but still has problems with limited intracellular information coverage. Here, we show a simple and efficient all-in-one system integrating cell injection, cell extraction, online cell lysis, analyte ionization, and mass spectrometric detection for rapid single-HeLa-cell screening with in-depth profiling of cellular metabolites and drugs. Zinc oxide nanothorn-decorated filters with three bore sizes (5.22, 8.36, and 16.75 μm) were fabricated for efficient online lysis of the cell membrane (even nuclear membrane) to facilitate intracellular analyte release and demonstrated to have a size effect for potential subcellular discrimination. The two smaller-bore filters gave 2–11-fold improvements in signal response for representative intracellular metabolites, such as adenosine, glutamine, and leucine/isoleucine. Especially, the smallest-bore filter enabled successful detection of the metabolites in the nucleus, including tetrahydrobiopterin and cyclic guanosine monophosphate. The developed all-in-one system was explored to monitor the uptake of four anticancer drugs, including 5-fluorouracil, doxorubicin, gambogic acid, and paclitaxel in single cells, and further to investigate the drug uptake trends at the subcellular level. The all-in-one system integrates the merits of high-throughput single-cell screening and in-depth intracellular information profiling and is promising for high-coverage single-cell metabolome analysis to serve cell biology research and cancer research.
研究领域:
分析化学
·
细胞生物学
·
癌症研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 41
·415301
·
IF 3.551
Qian Zhao,Guangqiang Liu,Hongwen Zhang,Weiping Cai
A simple and cost-effective route to fabricating gold-coated glass nano-stings' arrays is presented for highly efficient surface enhanced Raman spectroscopy (SERS) chips via reactive ion etching of the glass slide covered with polystyrene (PS) colloidal monolayer and sputtering deposition of gold on it. The as-fabricated SERS chips consist of the nearly-hemispherical particles with submicron-size, which are hexagonally arranged into the ordered arrays. There are many short and long Au-coated glass nano-stings standing vertically on the hemispherical particles, showing high density tips (up to 7.0 × 103 μm−2). The formation of such gold-coated glass hierarchically structured array is attributed to the geometry of PS colloidal monolayer and the nanoscale roughness of glass slide's surface. Further, it has been demonstrated that such gold-coated glass array chip is highly SERS-active and can be utilized to detect trace organophosphorous toxicant with the limit below ppt level and good reproducibility in measurements. The intensity of the Raman peak shows the linear relation, in logarithmic scale, with the organophosphorous concentration from ppt to ppm level, exhibiting the possibility of quantitative detection in a large concentration range. This work has demonstrated the cost-effective method to fabricate the high performance SERS chips for trace detection of toxic molecules.
研究领域:
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2019
·
IF 6.97
Kefei Zhao,Jun Hu,Yue Ma,Tianyue Wu,Yuxia Gao,Fengpei Du
Retention, a crucial process in pesticide application, is heavily affected by the extremely low surface energy and micro/nanostructure of plant leaves. The inadequate retention like bouncing, splashing, and drifting often give rise to severe soil and groundwater pollution. In this article, we present an unprecedented topology-regulation approach that significantly contributes to this issue. A series of pesticide-loaded “hat”-shaped Janus carriers (HJCs) are synthesized via emulsion interfacial polymerization and characterized by scanning electron microscope, thermogravimetric analyzer, energy-dispersive spectrometer, and Fourier transform infrared spectroscopy. Upon spraying on plant leaves, the pesticide-loaded HJCs can embed with the micropapillae and nanosplinters on leaves driven by the “hanger-hat” topology effect, consequently leading to the enhanced retention evaluated by the deposition and flush resistance experiments. Moreover, the release behavior of pesticide-loaded HJCs is found to match the Ritger-Peppas model and finally achieves sustained release. Additionally, the generality of the HJCs synthetic strategy is also studied and applicable to multiple pesticides. This study not only provides a new strategy for increasing pesticide retention on plant leaves but also opens a promising aspect for the applications of Janus carriers in agriculture.
研究领域:
农业科学
·
材料科学
·
环境科学
✓ 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）