JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2024
·
IF 4
Junhui Du,Haibin Liu,Hongshuo Chen,Chuanjin Cui,Wensi Zhang,Xuechao Zhang,Zhang Bin
A competitive electrochemical aptamer biosensor for the selective detection of Pb 2+ was developed in this study. The PAMAM@Au hybrid materials and the bioprobe MB-GNPs-ssDNA were synthesized with chemical methods . Modified electrode with carboxylated graphene oxide was prepared via electrodeposition . PAMAM@Au was immobilized on the modified electrode using the EDC/NHS crosslinker, and aptamer (Apt) was bound to PAMAM@Au hybrid materials using the glutaraldehyde crosslinker. The assembly of MB-GNPs-ssDNA/Apt/PAMAM@Au/GO/SPCE biosensors was achieved through immobilizing bioprobe onto electrodes, based on the theory of aptamer-complementary chain reactions. The fabricated biosensor was characterized through electrochemical experiments, SEM, AFM , TEM, XPS and FTIR . The biosensor's performance was evaluated in a series of Pb 2+ aqueous solutions by differential pulse voltammetry (DPV), and the results demonstrated this biosensor had excellent repeatability, stability, and specificity. The detection range spanned from 0.5 pM/L to 500 nM/L, with a detection limit of 5 fM/L. Consequently, the proposed biosensor can serve as a reliable analytical tool for the sensitive detection of lead ions .
研究领域:
生物化学
·
分析化学
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DOI
高影响因子
CRYSTENGCOMM
·
2022
·Vol. 24
·期 46
·8060-8069
·
IF 3.756
Shu-Qin Qin,Wei Xu,Wen-Cai Ye,Ren-Wang Jiang
Guanidinium–naphthalenedisulfonic acid (GNPS) was used as a molecular catcher because (i) it contains a cavity and channel in the network; (ii) NH2+ can be used as a hydrogen bond donor, and SO3− can be used as a hydrogen bond acceptor; (iii) the co-planar naphthalene rings can form aromatic interactions with guest molecules. The liquid guests 1–8 [(−)-isopulegol (1), (−)-menthyl acetate (2), isoeugenol (3), 2,6-dimethylaniline (4), methyleugenol (5), 2,6-diisopropylaniline (6), methyl salicylate (7) and L(−)-carvone (8)] are successfully encapsulated in the cavity of GNPS and eight new crystals were obtained. Both aromatic and non-aromatic molecules form hydrogen bonds and C–H⋯π interactions with GNPS. Co-crystallization of 1–4 with GNPS led to stronger C–H⋯π interactions as compared to the previously reported GBPS. Furthermore, compounds 5–8 which were not co-crystallized with GBPS were found to be encapsulated in the cavity of GNPS. We found that the aromatic cavity of GNPS with hydrogen bonding and enhanced C–H⋯π interactions can be regarded as a useful tool for the structural determination of liquid molecules. Furthermore, the correct absolute configurations of 1, 2 and 8 can be assigned based on the small Flack parameters because of the presence of sulfur atoms in the host molecule GNPS.
研究领域:
化学晶体学
·
分子结构分析
·
材料科学
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DOI
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2019
·Vol. 220
·期 9
·1800553
·
IF 2.622
Da Xu,Yanwei Gao,Yang Sun,Zhaoyang Wang,Zhenhua Jiang,Xiangyu Jiang,Haibo Zhang
Polyaryletherketones (PAEKs) with pendant pyrene groups are prepared and used to functionalize and disperse graphene nanoplates (GNPs). A variety of polymers with a range of pyrene contents are studied. A monomer with pyrene and two hydroxyl groups is designed and synthesized through the Suzuki reaction and used to prepare a series of pyrene-functioned PAEKs (Py-PAEKs) by copolymerization. Experiments demonstrate that Py-PAEKs have not only excellent solubility, but also excellent mechanical properties and outstanding heat resistance. In the same treatment condition, the concentration of GNPs that are modified by Py-PAEK with 40 molar percentage of pyrene (Py-40) increases 88 times of the concentration of pure GNPs in NMP. In addition, adding 0.5% GNPs, which is functionalized by Py-40 to PEEK resin, improves the flexural strength of polymer composite nearly 12% and while the tensile strength of these composites improves nearly 10% with a doubling of the strain at break.
研究领域:
材料科学
·
化学工程
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DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2019
·
IF 1.911
Zheng Zhang,Yuanhui Ji,Wei Chen
In this work, hollow manganese dioxide/gold nanoparticle (MnO 2 /GNPs) hybrid drug nanocarriers were prepared by coupling the gold nanoparticles (GNPs) with hollow structure manganese dioxide (MnO 2 ). Among them, GNPs have been used as near-infrared (NIR)-responsive element for photothermal effect under NIR laser irradiation. The glutathione (GSH)-responsive and pH-responsive performances of drug release were derived from hollow MnO 2 . Particularly, Doxorubicin hydrochloride (DOX) can be loaded into hollow MnO 2 /GNPs with the drug loading efficiency up to 82.0%. Moreover, the photothermal effect and GSH-/pH-responsive properties of hollow MnO 2 /GNPs were investigated. The hollow MnO 2 /GNPs possessed satisfactory drug release efficiency ( ca. 87.4% of loaded drug released in 12 h) and have high photothermal conversion efficiency, multiresponsive properties, and degradability. Finally, the kinetics of drug release was discussed in detail. Thus, our finding highlights that the multiresponsive nanocarriers are of great potential in the field of drug controlled release.
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高影响因子
IET Nanodielectrics
·
2019
·Vol. 2
·期 3
·97-102
·
IF 0
Yi Chen,Zhen Kong,Wenqi Chen,Lv Xiao,Yong Yuan,Zhongquan Li,Qixin Zhuang
Graphite nanoparticles (GNPs) were introduced into poly(p-phenylene benzobisoxazole) (PBO) matrix to produce composites via in situ polymerisation. Films of various composites were fabricated through the solution casting method in methanesulfonic acid (MSA) with the help of two sand core plates. The interlayer spacing of GNPs increased slightly confirmed by XRD as a result of an expanding effect caused by continuously formed PBO chains between the graphene nanosheets of GNPs during polymerisation. Also, due to the uniform dispersion of GNPs into PBO matrix, composite films exhibited an improved tensile strength (258 MPa, 72% higher than that of pure PBO) with 5 wt% loading of GNPs fillers. The initial decomposition temperature of the composite is ∼630°C. Besides, benefitting from the interfacial polarisation in this conductive filler/polymer system, the dielectric constant of the composites with 10 wt% loading of GNPs reached 6.96, which were over two times higher than that of pristine PBO polymer (2.91).
研究领域:
材料科学
·
高分子科学
·
纳米技术
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DOI
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2026
·Vol. 46
·期 16
·118638
·
IF 6.3
Xueqi Gu,Xinyue Hu,Daheng Wu,Xian-Zong Wang,Jianxi Liu,Hong Yu,Cheng-Feng Du,Long Wang,Jun Yang
Yttria-stabilized zirconia (YSZ) is a promising candidate for abradable seal coatings (ASC) in aero-engines, yet its inherent high coefficient of friction (COF) limits further application. This study introduced dual solid lubricant phases consisting of graphene nanoplatelets (GNPs) and silica-coated hexagonal boron nitride (h-BN@SiO 2 ) with different mass fractions into YSZ, and their tribological performance was systematically evaluated from room temperature to 750 °C. The composite containing 15 wt% GNPs and 5 wt% h-BN@SiO 2 exhibited low and stable COF (below 0.3) and moderate wear rates. Notably, it achieved an ultra-low COF of 0.08 at 750 °C. This outstanding performance originates from the formation of a low-shear graphene/BN interlaced lamellar structure, while tribochemically formed silicate phases and molten boron oxide further enhance the overall tribological performance of the composite. This work proposes an effective design approach for the development of high-performance YSZ-based ASC materials across a broad temperature range.
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高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2022
·Vol. 128
·期 9
·1-9
·
IF 2.983
Liu Fu,Wang Mingjie,Chen Yao,Gao Jianmin
When graphene is used to enhance reaction-bonded silicon carbide (RBSC), the problem of graphene being corroded by molten silicon should be considered. In this work, the polycarbosilane (PCS) was uniformly adhered to the surface of graphene nanoplatelets (GNPs) by the sol–gel method, and SiC barrier formed after pyrolysis. The structural evolution of GNPs in reaction sintering and the chemical structure of GNPs-PCS were investigated. The results showed that GNPs after siliconizing showed a porous structure, consisting of nanometer SiC particles on the surface. The ceramic yield and final pyrolysis temperature of PCS were reduced after mixing with GNPs and divinylbenzene (DVB). The SiC formed by the pyrolysis of PCS was uniformly distributed among GNPs. SiC whiskers (SiC w ) were observed in the sample of GNPs and GNPs-PCS after siliconizing. The difference and formation mechanism of SiC w in these two samples were discussed. After PCS modification and pyrolysis, GNPs survived in the loss on ignition experiment. The prepared composite powder further improved the toughness of GNPs/RBSC by 14.69%.
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高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2019
·
IF 3.973
Feng Huo,Yuhang Liu,Yuran Tang,Yongqin Cao,Chao Tan,Feng Yang,Xiupei Yang
Au 11 (SG) 7 gold nanoparticles (GNPs) were synthesized from HAuCl 4 using thiol compounds containing an amino group to serve as both the reducing agent and the ligand. A three-dimensional network structure (…Au-SNH 2 →M n+ ⟵H 2 NS-Au…) was formed after the M n+ (Pb 2+ , Cd 2+ , Zn 2+ and Ag + ) coordinated the gold nanoparticles through the amino group in the thiol ligand, which promoted aurophilicity (…Au…Au…) and induced GNP aggregation and emission. The differences in coordination between the amino group and metal ions resulted in different emission wavelengths (Pb 2+ , Cd 2+ , Zn 2+ and Ag + : λ ex = 365 nm˜370 nm, λ em = 580, 645, 630 and 565 nm). Aggregation induced emission of amino thiol capped GNPs via coordination of Pb 2+ or Cd 2+ can be used as a fluorescent sensor of the both metal ions (λ ex = 365 nm, λ em = 580/645 nm) and were used for living bioimaging in vivo and in vitro.
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DOI
PubMed
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Jiayue Zhou,Dongmei Li,Tiantian Li,Ziwei Chen,Zhuxin Chang,Guanggui Yu,Ruicong Zhou,Linyuan Wang,Yinuo Chen,Jie Zhao,Huan Liu,Na Sai
A new biomimetic film was developed for the detection of 17β-estradiol (E2), drawing inspiration from the hydrophilic and hydrophobic (HI-HO) pattern of the beetle's back. The film had a non-densely packed face-centered cubic (FCC) structure of interwoven hydrophobic gold nanoparticles (GNPs) and hydrophilic poly ionic liquid methyl methacrylate (PILMMA) spheres. The film exhibited reflection (RE) and fluorescence (FL) emissions. The GNPs demonstrated a localized surface plasmon resonance effect (LSPR) and collaborated with PILMMA spheres to form a pronounced HI-HO pattern that promoted the concentration of target E2 molecules and increased sensitivity. After optimization, the film showed direct, ultrasensitive (as low as 1.5 nM), fast (11 min), and selective detection of E2 with a wide concentration range. During detection, RE and FL changes of the film were observed by the naked eye without any color display equipment. The recovery of E2 was between 87.0 % and 111.2 % in real samples.
研究领域:
分析化学
·
纳米技术
·
生物传感器
·
环境监测
·
材料科学
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产品关联
DOI
PubMed
高影响因子
METALS AND MATERIALS INTERNATIONAL
·
2020
·Vol. 27
·期 10
·4263-4270
·
IF 1.99
Chen Lili,Qi Yushi,Fei Yanhan,Du Zhiming
Abstract In order to significantly enhance the performance of graphene in metal matrix composites, in situ SiC nanorods were successfully fabricated to enhance graphene nanoplatelets (GNPs)-reinforced Al2024 composite, which was prepared by powder semi-solid processing and friction stir processing. The SiC–GNPs dispersed in the Al matrix uniformly, SiC nanorods were randomly grown on GNPs sheets in any direction, bridging GNPs as well as GNPs and the Al matrix. Meanwhile, the interfacial bonding was effective. The hybrid reinforcement of SiC and GNPs endowed composites with superior mechanical properties and thermal conductivity. The in situ SiC nanorods transfer phonons and reduce phonon scattering effect in the through-plane direction of GNPs, which conducive to heat transmission. The composite exhibits improved mechanical properties, maximum tensile strength and hardness of 589 MPa and 193 HV are obtained, with 1.0 wt% GNPs addition, respectively. The thermal conductivity of composite increases with the content of SiC–GNPs. When the content of SiC–GNPs reaches 1.5 wt%, the composite has significantly enhanced thermal conductivity (224 W m −1 K −1 ), which is 115% times higher than that of Al2024. Moreover, the effects of SiC–GNPs on the properties were discussed. Graphic Abstract
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高影响因子
CERAMICS INTERNATIONAL
·
2019
·
IF 3.45
Weidong Zhang,Yuan Zheng,Xue Zhang,Qing Zhu,Lili Tian,Hongjing Wu,Hongxia Yan,Shuhua Qi
Graphene nanoplatelets (GNPs) based materials are promising and low-cost absorbers. To develop new varieties of these absorbers, two kinds of GNPs/ZnO nanocomposites (GNPs/ZnO nanorod arrays and GNPs/ZnO nanoneedles) were synthesized in this paper, and the microwave absorption performance (MAP) together with the relevant mechanism were investigated based on the different microstructures, followed by the discussion of the growth mechanism of ZnO nanorod and nanoneedle. The result reveals that GNPs/ZnO nanorod arrays have strong reflection loss (RL) up to −44.8 dB, and effective attenuation bandwidth (RL˂-10 dB) of 4.65 GHz. While, GNPs/ZnO nanoneedles possess effective attenuation bandwidth of 6.7 GHz that covered entire X-band, and the superb RL was −15.3 dB. According to the detail analysis, we found that the pathways of attenuation EM wave are the same, and the differences between each other are responsible for the different intensity of interface polarization and multiple-scattering, due to the different microstructures.
研究领域:
材料科学
·
电磁学
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DOI
高影响因子
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
·
2020
·Vol. 412
·期 11
·2551-2564
·
IF 3.637
Yuan Meng-Meng,Zou Jiao,Huang Zhao-Ning,Peng Dong-Ming,Yu Jin-Gang
A novel electrochemical sensor, platinum nanoparticles/graphene nanoplatelets/multi-walled carbon nanotubes/β-cyclodextrin composite (PtNPs-GNPs-MWCNTs-β-CD) modified carbon glass electrode (GCE), was fabricated and used for the sensitive detection of folic acid (FA). The PtNPs-GNPs-MWCNTs-β-CD nanocomposite was easily prepared with an ultrasound-assisted assembly method, and it was characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The electrochemical behavior of FA at PtNPs-GNPs-MWCNTs-β-CD/GCE was investigated in detail. Some key experimental parameters such as pH, amount of PtNPs-GNPs-MWCNTs-β-CD composite, and scan rate were optimized. A good linear relationship ( R 2 = 0.9942) between peak current of cyclic voltammetry (CV) and FA concentration in the range 0.02–0.50 mmol L −1 was observed at PtNPs-GNPs-MWCNTs-β-CD/GCE. The detection limit was 0.48 μmol L −1 (signal-to-noise ratio = 3). A recovery of 97.55–102.96% was obtained for the determination of FA in FA pills (containing 0.4 mg FA per pill) at PtNPs-GNPs-MWCNTs-β-CD/GCE, indicating that the modified electrode possessed relatively high sensitivity and stability for the determination of FA in real samples. Graphical abstract
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PubMed
高影响因子
危险品化学品经营许可证（带存储）