CHEMISTRY OF MATERIALS
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2014
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IF 8.535
Peng He,Jing Sun,Suyun Tian,Siwei Yang,Shengju Ding,Guqiao Ding,Xiaoming Xie,Mianheng Jiang
Dispersing graphene in various solvents is one of the key technologies toward the practical applications of graphene. Herein, using graphene quantum dots (GQDs) as stabilizer, aqueous dispersions of graphene with good stability were demonstrated by directly dispersing commercialized graphene powder into water. Amazingly, 100 mg of graphene powder could be stabilized by an average of merely 7.8 mg GQDs to form aqueous dispersions with a maximum concentration of up to 0.4 mg/mL and stability at least 3 months. The introduction of a small amount of GQDs also allowed for the fabrication of water-redispersible graphene slurry and powder, which would largely facilitate the transportation and applications of graphene. The mechanism of the GQDs stabilized graphene in water was proposed and experimentally verified through UV–visible spectroscopy and zeta potential measurements. Moreover, flexible graphene papers directly assembled from the water-dispersible graphene exhibited controllable thickness, good conductivity, and acceptable strength. With properties not compromised by GQDs, water-dispersible graphene is expected to be widely applicable in electrical and electrochemical device fields.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
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2019
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IF 5.383
Liting Zheng,Shaoshuai Ma,Zihua Wang,Yunhui Shi,Qian Zhang,Xinhua Xu,Qiang Chen
This study accounts the controllable design over the structure and morphology of Ni-P nanomaterials directly growing on cellulose paper, and its excellent non-enzymatic electrocatalytic performance to urea. The Ni-P papers were prepared by simple solution soaking and electroless bathing. And the simple experimental steps and mild experimental conditions make it possible for large-scale industrial production, and potential for practical applications. In addition, tuning the pH and concentration of the electroless bath, the Ni-P nanomaterials with different morphologies of nanoflower , nanosheet , nanowire microsphere and microsphere were obtained. The Ni-P nanomaterials impart conductivity to cellulose paper while being potently sensitive to urea owing to its high catalytic activity. Cellulose paper has a large specific area and open macroporous framework which hadn't been damaged during the process of electroless bathing, providing much more activated sites for Ni-P deposition. And the prepared Ni-P papers, as composite materials of cellulose papers loading Ni-P nanomaterials, have high electrocatalytic properties to urea. Comparing the electrochemical behaviors of the four Ni-P paper electrodes with different morphologies, the Ni-P nanoflower paper electrode showed the best electrochemical performance with highest sensitivity of 683.46 μA mM −1 cm −2 in the low concentration range (0–1 mM) and 1140 μA mM −1 cm −2 in the high concentration range (1–11 mM), lowest detection limit of 12 μM, shortest response time of 3 s, which may owes to the highest surface area of the Ni-P nanoflower structure. It also has a good stability in room environment remaining 97% after 35 days of storage. Moreover, the electrocatalytic activities of the four Ni-P paper electrodes are ranked as follows: nanoflower > nanosheet > nanowire microsphere > microsphere. What's more, the long-term stability and repeatability, good selectivity of the flexible Ni-P paper make it successfully applied to swimming pool water quality monitoring.
研究领域:
材料科学
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电化学
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DOI
高影响因子
Nanoscale
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2017
·Vol. 9
·期 43
·16871-16878
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IF 7.367
Jiheng Ding,Hongran Zhao,Qiaolei Wang,Huimin Dou,Hao Chen,Haibin Yu
Graphene nanosheets (GNSs) possess outstanding conductivity, good thermal and chemical stabilities and desirable mechanical strengths. However, the unfunctionalized GNSs are hydrophobic and insoluble in water, which limits their application in many technological areas. Herein, we report a design strategy to exfoliate few-layered aqueous dispersible graphene by a simple ball-milling technique. The modifier of sodium lignosulfonate (LS) enables to synthesize LS-decorated GNSs from natural graphite based on the strong π–π interaction, greatly improving GNSs dispersion in water. The resultant GNSs exhibit a high production yield (∼100%), high dispersion concentration and excellent film formation ability. The electrical and thermal conductivities of the as-prepared graphene paper were up to 2385 S cm−1 and 1324 W m−1 K−1, respectively, superior to those of most previously reported graphene materials. This graphene paper with the superb electrical and thermal conduction properties also exhibits excellent mechanical flexibility and structure intensity during bending, which has potential usages in electronic packaging and high power thermal management.
研究领域:
材料科学
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热管理技术
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电子工程
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产品关联
DOI
PubMed
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
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2016
·Vol. 22
·期 32
·11224-11231
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IF 5.771
Zhi-Chao Xiong,Ying-Jie Zhu,Fei-Fei Chen,Tuan-Wei Sun,Yue-Qin Shen
Graphical Looks good on paper : Silver nanoparticle-decorated ultralong hydroxyapatite nanowires were fabricated by a facile one-step solvothermal approach and applied to the fabrication of a new type of highly flexible and free-standing HAPNWs@AgNPs paper (see figure) with high biocompatibility and excellent antibacterial activity. A highly flexible and free-standing paper with high antibacterial activity made from silver nanoparticle (AgNP)-decorated ultralong hydroxyapatite nanowires (HAPNWs) is reported. The HAPNWs@AgNPs nanocomposites were obtained from a facile one-step solvothermal process and utilized for the construction of highly flexible and free-standing inorganic paper through a simple vacuum-filtration procedure. The structure and properties of the HAPNWs@AgNPs paper were characterized in detail. Scanning electron microscope (SEM) and transmission electron microscope (TEM) micrographs show that AgNPs are highly dispersed and stabilized in the nanocomposite and exhibit a narrow particle size distribution. The effects of the concentration of silver nitrate, solvothermal temperature and time on the product were systematically investigated. This method is simple, convenient and reproducible. The as-prepared HAPNWs@AgNPs paper shows long-time sustained silver-ion release, high antibacterial activity against both Gram-negative and Gram-positive bacteria, and good biocompatibility. Overall, this work provides a novel pathway for the preparation of a new type of highly flexible, free-standing and antibacterial inorganic paper made from silver nanoparticle-decorated hydroxyapatite nanowires for various applications, as a promising functional biomaterial.
研究领域:
材料科学
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生物医学工程
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纳米技术
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2016
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IF 4.758
Bin Wang,Yuanya Wu,Yanfen Chen,Bo Weng,Changming Li
A flexible free-standing paper sensor was fabricated for the first time via in situ growth of Cu nanoflower on reduced graphene oxide (RGO) sheets towards amperometrically non-enzymatic detection of glucose. The low cost of copper (Cu) and graphene made the prepared sensor inexpensive in comparison with sensors made from noble metal catalysts . This Cu-RGO paper sensor exhibited high sensitivity and good selectivity when utilised in glucose sensing attributed to the synergistic effects of graphene paper and Cu nanoflowers. The combination of excellent catalytic activity , largely reactive surface area of Cu nanoflower and good conductivity of graphene paper enabled the sensor to perform well in glucose detection. The prepared glucose sensor holds a great promise for inexpensive flexible electrochemical non-enzymatic glucose sensors.
研究领域:
生物医学工程
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材料科学
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电化学分析
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产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
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2019
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IF 6.309
Qiuping Qian,Yan Wang,Min Zhang,Limin Chen,Jie Feng,Yi Wang,Yunlong Zhou
We report a facile, low cost and readily scalable method for the fabrication of a flexible paper-based strain sensor. Approaches of pen-writing, paper-transferring and elastomer-packaging were exploited to build a strain sensor with layered structures consisting of the graphene mesh and conductive polyaniline . The normalized conductivity change ( Δ G / G 0 ) and gauge factor could reach as high as 747 and 1.1 × 10 4 , respectively. The mechanism of ultra-high conductivity change was attributed to the formation of micro-disconnection and micro-cracking in the layered structure deduced by Raman imaging and a simulation based on equivalent resistor networks . As a proof of the concept, the strain devices were finally exploited in sign language recognition. Our work demonstrated a new strategy to create ultra-high sensitive communication devices for people with speech and hearing impairment.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
JOURNAL OF RAMAN SPECTROSCOPY
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2019
·Vol. 50
·期 8
·1074-1084
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IF 2.809
Shuang Lin,Xiang Lin,Xueying Song,Siqingaowa Han,Li Wang,Wuliji Hasi
Surface-enhanced Raman scattering (SERS) substrate is the key to SERS technology and it is still a basic focus to fabricate desirable SERS substrates offering multiple advantages of strong Raman enhancement and good reproducibility and portability. A flexible paper-based SERS substrate were fabricated involving the use of Au nanocubes (NCs) monolayer. Au NCs were generated with tunable size in the range of 24 to 63 nm through seed-mediated growth method. The effect of support on SERS properties of Au NCs–assembled monolayer was systemically explored. As a result, more excellent SERS performance could be obtained by assembling Au NCs on the filter paper. Besides, the influence of Au NCs' size on SERS-enhanced effect of paper-based substrate was also investigated. Our results clearly indicated that paper-based substrate with 39 nm Au NCs possessed the optimal SERS enhancement. This SERS substrate exhibited high sensitivity with enhancement factor (EF) up to 9.75 × 10 7 and demonstrated good uniformity and time stability. Furthermore, based on this superior paper-based SERS substrate with advantage of powerful sample extraction performance, the measurement of crystal violet (CV) on shell surface were successfully carried out with detection limit down to 2.17 × 10 −7 M. And linear quantification were achieved in the range from 5 × 10 −5 to 5 × 10 −7 M. To sum up, the as-prepared SERS substrate is applicable for on-site detection and analysis of CV on various shell surfaces.
研究领域:
材料科学
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分析化学
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纳米技术
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）