ADVANCED FUNCTIONAL MATERIALS
·
2016
·Vol. 26
·期 37
·6797-6806
·
IF 11.382
Yue Ma,Reza Younesi,Ruijun Pan,Chenjuan Liu,Jiefang Zhu,Bingqing Wei,Kristina Edström
Pulverization of electrode materials and loss of electrical contact have been identified as the major causes for the performance deterioration of alloy anodes in Li-ion batteries. This study presents the hierarchical arrangement of spatially confining silicon nanoparticles (Si NPs) within graphene foam (GF) for alleviating these issues. Through a freeze-drying method, the highly oriented GF monolith is engineered to fully encapsulate the Si NPs, serving not only as a robust framework with the well-accessible thoroughfares for electrolyte percolation but also a physical blocking layer to restrain Si from direct exposure to the electrolyte. In return, the pillar effect of Si NPs prevents the graphene sheets from restacking while preserving the highly efficient electron/Li + transport channels. When evaluated as a binder-free anode, impressive cycle performance is realized in both half-cell and full-cell configurations. Operando X-ray diffraction and in-house X-ray photoelectron spectroscopy confirm the pivotal protection of GF to sheathe the most volume-expanded lithiated phase (Li 15 Si 4 ) at room temperature. Furthermore, a free-standing composite film is developed through readjusting the pore size in GF/Si monolith and directly integrated with nanocellulose membrane (NCM) separator. Because of the good electrical conductivity and structural integrity of the GF monolith as well as the flexibility of the NCM separator, the as-developed GF/Si-NCM electrode showcases the potential use in the flexible electronic devices.
研究领域:
材料科学
·
电化学
·
纳米能源材料
·
储能技术
·
先进电池
·
柔性电子器件
✓ 已验证
DOI
高影响因子
CARBON
·
2020
·
IF 8.821
Baoxi Zhang,Yuxin Ying,Yixue Zhu,Yinan Jiang,Yongxia Zhang,Yunfeng Qiu
Interphase in polymer composites plays a key role in enhancing their multi-functionality. Herein, an effective strategy is designed to optimize the interphase microstructure in graphene foam/PDMS (PDMS/GrF) using polypyrrole (PPy) nanowires (denoted as PDMS/GrF@PPy). The interfacial microenvironment of graphene foam is successfully modified by anchoring polypyrrole nanowires, showing strong interfacial strength with PDMS . The tensile strength , Young’s modulus, electrical conductivity , thermal conductivity , mechanical durability and electron-photo-thermal deicing efficiency of PDMS/GrF@PPy composites are simultaneously higher than that of PDMS/GrF composites. Molecular simulations further illustrated that the interfacial interaction energy increased from 100.4 to 280.2 kcal/mol after introducing PPy nanowires between GrF and PDMS. As a proof of concept for deicing application, PDMS/GrF@PPy composites displays excellent deicing efficiencies of 82.9% and 55.7% by Joule heat and NIR irradiation after 500th stretching cycles, respectively, which is obviously outperforming PPy@GrF composites (58.3% and 44.2%). Consequently, PPy nanowires not only optimizes the interfacial strength of polymer composites, but also endows them with multi-functionalities, providing promising candidates of deicing, strain sensor, thermal interface management, etc.
研究领域:
材料科学
·
复合材料工程
·
界面工程
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 68
·39958-39964
·
IF 3.049
Xinxiu Wu,Fangfang Niu,Ao Zhong,Fei Han,Yun Chen,Jinhui Li,Guoping Zhang,Rong Sun,Ching-Ping Wong
Flexible strain sensors possess a great potential for applications in wearable electronic devices for human motion detection, health monitoring, implantable medical devices and so on. However, the development of highly sensitive strain sensors remains a challenge in the field of wearable electronics. Herein, we prepared a highly sensitive strain sensor, which was composed of a three-dimensional reduced graphene oxide foam decorated with silver nanoparticles (Ag NPs) to enhance the conductivity. Then, half-cured polydimethylsiloxane was employed to get a special “hollow packaged” structure. Thanks to the synergistic conductive effect of Ag NPs and the reduced graphene oxide flakes as well as the special “hollow packaged” structure, the as-prepared flexible strain sensor not only possessed a dramatic gauge factor of 1588 (at 50% sensing strain), but also exhibited high stability in 500 cycles of 30% strain. The mechanism of the enhancement of the sensitivity with the special “hollow packaged” structure was discussed as well. Meanwhile, the detection of the bending and rotation of wrists and the bending of fingers and arms was demonstrated, showing attractiveness in human motion detection.
研究领域:
材料科学
·
电子工程
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 2
·239
·
IF 5.3
Xiaochun Deng,Xueting Lin,Huaxu Zhou,Jiyang Liu,Hongliang Tang
Direct, rapid, and sensitive detection of drugs in complex biological samples is essential for drug abuse control and health risk assessment. In this work, an electrochemical sensor was fabricated based on equipment of vertically-ordered mesoporous silica film (VMSF) on an electrochemically pre-treated three-dimensional graphene electrode (p-3DG), which can achieve direct and sensitive determination of methylthiopyridazine (TR) in urine. Three-dimensional graphene (3DG) with a continuous and interpenetrating graphene network was used as the supporting electrode and simple electrochemical polarization was employed to pre-treat 3DG to improve surface hydrophilicity and electrocatalytic performance. VMSF was easily grown using an electrochemical assisted self-assembly method within 10 s and was stably bound to the p-3DG surface. The nanochannel array on the as-prepared VMSF/p-3DG sensor enriched positively charged TR, leading to significantly improved electrochemical signal. Combined with the high electric activity of p-3DG and the enrichment of nanochannels, VMSF/p-3DG realized sensitive determination of TR ranging from 50 nM to 10 μM with a low detection limit (DL, 30 nM). Owing to the anti-fouling and anti-interference performance of VMSF, the common electroactive molecules including ascorbic acid (AA) and uric acid (UA) did not interfere with the detection. In addition, the detection of TR in buffer and urine exhibited similar sensitivity. Accurate detection of TR in urine was realized.Keywords:electrochemical sensor;three-dimensional electrode;macroporous graphene foam;vertically-ordered mesoporous silica film;methidazine
研究领域:
分析化学
·
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES PART B-ENGINEERING
·
2020
·
IF 7.635
Tiantian Yang,Zeyi Jiang,Heming Han,Xinzhi Cai,Yuqiao Liu,Xinru Zhang,Xinxin Zhang,Yujie Ren,Jian Hu
Developing thermal management materials with high thermal conductivity (TC) is critical to the microelectronics. Herein, we fabricated high thermal conductive polyvinylidene fluoride (PVDF) composites by using graphene foam (GF) and dopamine modified graphene nanoplatelets (mGNPs) as fillers. The results indicated that mGNPs could weld onto the GF skeleton to repair the structural defects of GF, which is conducive to improving the composite's TC by forming efficient thermal conductive pathways in the matrix. The obtained GF/mGNPs/PVDF composite (GF: 0.27 vol%, mGNPs: 8.82 vol%) exhibited an in-plane TC of 6.32 W m −1 K −1 , which was much higher than that of GF/GNPs/PVDF composite (4.26 W m −1 K −1 ) at the same GF and GNPs contents. The GF/mGNPs/PVDF composites also possessed excellent dimensional stability and mechanical property. The study revealed that welding mGNPs onto GF is an effective method to fabricate high thermal conductive composites.
研究领域:
材料科学
·
纳米技术
·
热传导工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Junnan Wang,Qijie Wang,Wei Wang,Pinbo Li,Yazhen Zhao,Junjian Zhai,Wu Zhao,Han Zhang,Jiangni Yun,Zhiyong Zhang,Jiangxiao Tian,Zhouhu Deng,Junfeng Yan
In this study, a unique dual-spatial three-dimensional (3D) porous structure comprising Ni/C hollow microspheres was prepared from a Ni-based metal organic framework (Ni-MOF) embedded in graphene foam (GF) by the solvothermal method followed by calcination . The graphene foam-based composite, Ni/C@GF (NCGF), exhibited a stable spatial conductive network structure and diverse porous architecture, promoting the microwave absorption (MA) properties of composites. The NCGF with a Ni/C and GF ratio of 1:2.5 displayed a reflection loss (RL) value of ─63 dB with 15 wt% loading, while the thickness is only 1.76 mm. Further, its effective absorption bandwidth (EAB) reached to 5.4 GHz at 2 mm thickness. In addition, when the RL value is less than ─20 dB, the NCGF still manifests a wider bandwidth (2.2 GHz) and a relatively low thickness (1.76 mm). In addition to the extraordinary attenuation ability, the excellent MA performance is mainly ascribed to optimized impedance matching characteristics. Moreover, multiple reflections promoted by the dual-space structure also play a significant role during the microwave absorption process.
研究领域:
材料科学
·
纳米复合材料
·
电磁功能材料
·
物理化学
·
能源材料
✓ 已验证
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2017
·
IF 4.873
Haoming Fang,Xiao Zhang,Yunhong Zhao,Shu-Lin Bai
In the present study, high thermally conductive and electrically insulated polymer composites containing modified dense graphene foam (MGF) and modified hexagonal boron nitride (M-h-BN) via polydopamine (PDA) coating and 3-aminopropyltriethoxysilane (APTS) grafting were manufactured and studied. Due to the double percolated networks built by MGF and M-h-BN, the polydimethylsiloxane (PDMS) matrix composite has high thermal conductivity of 23.45Wm −1 K −1 and 2.11Wm −1 K −1 in in-plane and out-of-plane directions, respectively. In addition, an insulated layer of M-h-BN/PDMS can be introduced onto both sides of composite sample with the help of infiltration technique, which results in a high breakdown strength of 4.5 kV/mm. Owing to the excellent comprehensive properties, the M-h-BN/MGF/PDMS composite has a promising application in heat management field of the microelectronic industry.
研究领域:
材料科学
·
热管理技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry B
·
2024
·
IF 6.1
Jing Hong,Zhanchi Zhu,Leisha Cui,Zhaojun Wang,Ying Hao,Xiaopeng Tian,Guosheng Cheng
Hematopoietic stem cell (HSC) expansion offers a key strategy to address the source limitation and donor shortages of HSCs for the treatment of various blood disorders. Specific remodeling of the complex bone marrow microenvironment that contributes to efficient in vitro expansion of HSCs remains challenging. Here, inspired by the regions with different stiffness levels in the bone marrow niche, a three dimensional (3D) bone marrow-mimicking composite scaffold created based on gelatin–hyaluronic acid (Gel–HA) hydrogels and graphene foams (GFs) was engineered to support the in vitro expansion of HSCs. The composite scaffold was prepared by forming a photo-cross-linked Gel–HA hydrogel surrounding the GF. The “soft” Gel–HA hydrogel and “stiff” GF replicate the structure and stiffness of the vascular niche and endosteal niche in the bone marrow, respectively. Furthermore, HSCs cultured in the Gel–HA/GF scaffold proliferated well and retained the CD34+CD38− immunophenotype and pluripotency, suggesting that the Gel–HA/GF composite scaffold supported the in vitro expansion of HSCs, maintaining the primitive phenotype and the ability to differentiate into functional blood cells. Thus, the hydrogel/graphene composite scaffold offers a means of facilitating HSC expansion through structurally and mechanically mimicking bone marrow niches, demonstrating great promise for HSC transplantation.
研究领域:
生物材料
·
组织工程
·
干细胞生物学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2022
·Vol. 38
·期 4
·919-927
·
IF 2.726
Zhu Junlun,Cui Qian,Wen Wei,Zhang Xiuhua,Wang Shengfu
Although great progress has been made in the advancement of nanozymes, most of the studies focus on mimicking peroxidase, oxidase, and catalase, while relatively few studies are used to mimic laccase. However, the use of nanomaterials to mimic laccase activity will have great potential in environmental and industrial catalysis. Herein, Cu/CuO-graphene foam with laccase-like activity was designed for the identification of phenolic compounds and the detection of epinephrine. In a typical experiment, the formation mechanism of Cu/CuO-graphene foam was investigated during the pyrolysis process by thermogravimetric-mass spectrometry. As a laccase mimic, Cu/CuO-graphene foam exhibited excellent catalytic activity with a Michaelis-Menten constant and a maximum initial velocity of 0.17 mmol/L and 0.012 µmol·L −1 ·s −1 , respectively. Based on this principle, Cu/CuO-graphene foam nanozyme could differentially catalyze phenolic compounds and 4-aminoantipyrine for simultaneous identification of phenolic compounds. Furthermore, a colorimetric sensing platform was fabricated for the quantitative determination of epinephrine, showing linear responses to epinephrine in the range of 3 µg/mL to 20 µg/mL with the detection limit of 0.2 µg/mL. The proposed Cu/CuO-graphene foam nanozyme could be applied for the identification of phenolic compounds and the detection of epinephrine, showing great potential applications for environmental monitoring, biomedical sensing, and food detection fields.
研究领域:
材料科学
·
环境科学
·
分析化学
·
生物技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2018
·
IF 3.235
Weiwei Mao,Haiping He,Zhizhen Ye,Jingyun Huang
A facile and in-situ electrochemical nanofabrication towards three-dimensional graphene@nickel foam (3DGF) to produce Ni(OH) 2 nanosheets was proposed and the integrated Ni(OH) 2 /3DGF electrode for glucose sensing was researched. The nanofabrication of chemical battery reaction is mild and facile. Nanopores formation plays a key role in promoting the growth of Ni(OH) 2 nanosheets, leading to enhanced electro-catalysis. In this constructed unique 3D hierarchical architecture, graphene layers not only provide excellent electrical conductivity but also benefit to the sensing stability, while the 3D interconnected structure prevents the agglomeration or exfoliation of Ni(OH) 2 nanosheets and the porous Ni(OH) 2 film benefits to the mass and charge transfer, and thus improving the sensing performance remarkably. As a successful demonstration, the fabricated Ni(OH) 2 /3DGF glucose sensor exhibits an appreciable sensitivity 2366 μA mM −1 cm −2 and a low detection limit of 0.32 μM. This study proposes an easy and convenient strategy to prepare Ni(OH) 2 and graphene integrated glucose sensor, promisingly applied in practice.
研究领域:
材料科学
·
电化学
·
纳米技术
·
传感器
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Shumeng Zhang,Shiyi Deng,Yuan Luo,Dawei Tang,Fangzhen Wang,Gen He
Intracellular hydrogen peroxide (H 2 O 2 ) plays a crucial role in regulating various biological processes including cell proliferation, apoptosis, and immune response. Driven by the remarkable need for determination of intracellular H 2 O 2 with higher precision and sensitivity, a novel ternary nanocomposite electrode integrating silver nanoparticles (AgNPs)/Polyoxometalates (POMs)/three-dimensional graphene foam (3DGF) was fabricated for real-time detection of H 2 O 2 generated in MCF-7 cells. POMs acted like an artificial peroxidase, together with AgNPs that served as electron mediator to amplify the electrochemical signal were successfully loaded on the surface of 3DGF, which significantly improved the detection sensitivity due to synergistic advantages. The tricomponent nanohybrids modified glass carbon electrode (AgNPs@POMs-3DGF/GCE) showed a high sensitivity toward reduction of H 2 O 2 , and meanwhile had good long-term stability, wide linear range and low detection limit. Real-time detection of H 2 O 2 released from MCF-7 cells stimulated by N-formyl-L-methionyl-L-leucyl-phenylalanine (fMLP) had been demonstrated using the chronoamperometry based on AgNPs@POMs-3DGF/GCE, which showed a quick response and excellent specificity to H 2 O 2. It was expected that the AgNPs@POMs-3DGF/GCE was able to monitor H 2 O 2 during the dynamic biological process involving H 2 O 2 metabolism.
研究领域:
分析化学
·
纳米技术
·
生物电化学
·
材料科学
·
细胞生物学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2025
·
IF 4.5
Chen Wang,Yun Xie,Zhanchi Zhu,Zhaojun Wang,Jiawei Li,Zhaoming Song,Jing Hong,Jingqi Li,Hanmo Zhu,Ying Hao,Guosheng Cheng,Liqiang Luo
Central nervous system (CNS) diseases, characterized by irreversible neuronal damage, pose global health challenges with limited therapeutic options. Stem cell therapy, particularly using neural stem cells (NSCs), is promising with some constraints related to poor microenvironmental simulation. This study presents a composite scaffold integrating three-dimensional graphene foam (3D-GF), GelMA-PEG hydrogel, and mesenchymal stem cell derived small extracellular vesicles (sEVs) to mimic the brain's mechanical and electrical microenvironment while delivering bioactive factors. The hydrogel (<3 kPa) matches brain elasticity (0.5–5 kPa), 3D-GF provides a conductive neural network-like structure, and sEVs enhance neuronal differentiation. In vitro experimental results demonstrated that the NSCs in the composite scaffolds exhibited a proliferation efficiency approximately 7-fold (43.82 ± 2.34 %) higher than that of the control group while the differentiation efficiency was enhanced by 3-fold (49.56 ± 7.80 %). The scaffold's design facilitates mechanical support, electrical signal transduction, and molecular regulation, effectively offering a biomimetic microenvironment. This multi-modal scaffold overcomes traditional limitations, presenting a biomimetic strategy for CNS repair in degenerative diseases.
研究领域:
神经科学
·
生物材料
·
组织工程
·
干细胞治疗
·
纳米技术
✓ 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）