MOLECULAR BREEDING
·
2012
·Vol. 31
·期 3
·729-735
·
IF 2.852
Shirao Tsukasa,Ueno Kei-ichiro,Abe Tomoko,Matsuyama Tomoki
Four chrysanthemum cultivars were generated through (carbon) ion-beam irradiation of the original ‘Jimba’ ( Chrysanthemum morifolium Ramat.). The new cultivars had acquired a number of superior cultivation traits, while remaining identical to the commercially available ‘Jimba’ in appearance. In this study, polymerase chain reaction (PCR) assays were used to detect the mutated region of each strain, thereby allowing clear identification at the molecular level. PCR assays were performed with 446 primer sets, including random amplified polymorphic DNA (RAPD) primer sets (10-mer RAPD), arbitrarily primed (AP)-PCR primers based on retrotransposon-like sequences and modified RAPD primers (15-mer RAPD). 15-mer RAPD primers generated a 1.49-fold increased band number at high annealing temperatures compared with the original 10-mer RAPD primers and could thus be effective for detection of polymorphic patterns. Our results provide information on the mutated regions of these ion-beam-irradiated chrysanthemum cultivars. Thus, specific DNA markers could be used to improve identification of new cultivars of chrysanthemum as well as other clonal cultivars of horticultural and agricultural crops.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·
IF 4.5
Deng Chao,Xu Jie,Cen Changqun,Yang Meijun,Deng Yiheng,Yang Chunliang,Zhi Qing,Fu Lin
Ternary Sn-based sulfide materials are generally considered as potential candidate anode for next-generation lithium-ion batteries (LIBs) owing to their high capacity and superior ion/electrical conductivity. In the work, we successfully prepared the multiphase Cu 4 SnS 4 /CuS/SnS (CTS) nanoparticles uniformly anchored in the reduced graphene oxide (RGO) sheets (CTS/RGO). The CTS/RGO composite exhibits superior cycling stability with negligible capacity decay under a current density of 200 mA g −1 as well as favorable rate capability compared with that of bare CTS particles. The improved electrochemical performance can be attributed to the existence of RGO as a buffer to restrain the huge volume variation during the charge/discharge processes, enhancing the conductivity and diffusion kinetics of Li + in the composite. This work highlights the strengthening effect of RGO for the Li storage properties of Sn-based sulfides, which is beneficial to guide these composites with good electrochemical performances.
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高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2023
·Vol. 39
·期 6
·1070-1076
·
IF 3.1
Liu Deye,Lu Yang,Li Xu,Liu Fengmin,Liu Xiaomin,Lu Geyu
I n this study, we synthesized a core-shell structure of up-conversion nanoparticles (UCNPs) and deposited it on the surface of fluorine-doped tin oxide (FTO). Subsequently, we assembled a series of perovskite solar cells with FTO/UCNPs/c-TiO 2 /mp-TiO 2 /MAPbI 3 /Spiro-OMeTAD/Au structures with an effective area of 0.04 cm 2 . To optimize the devices, we adjusted the concentration of UCNPs precursor. The optimized device showed a power conversion efficiency (PCE) of 16.73% and a short-circuit current density ( J sc ) of 26.94 mA/cm 2 at AM 1.5. These values are 9.20% and 10.47% higher than those of the best performing control device (15.32% for PCE and 24.12 mA/cm 2 for J sc ), respectively. Furthermore, we characterized the perovskite layer, charge transport layer, and perovskite solar cells using various analytical methods. The results showed that the addition of UCNPs not only improved the charge extraction and transfer, but also enhanced the stability of electron transport layer devices. In conclusion, our findings offer a process for optimizing perovskite cells using UCNPs and preliminarily analyzing their principles.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN MEDICINE
·
2016
·Vol. 27
·期 11
·1-9
·
IF 2.272
Shi Yunfeng,Xiong Zhipeng,Lu Xuefei,Yan Xin,Cai Xiang,Xue Wei
Abstract We describe an electrostatic droplet generation method to prepare a novel carboxymethyl chitosan−graphene oxide hybrid particles for delivery purpose. Under an adjustable electrostatic field, graphene oxide and carboxymethyl chitosan mixed solution was sprayed as uniform micro-droplets, which were solidified as particles in CaCl 2 solution. Such hybrid particles are wished to have excellent stability in saline solution, and better delivery properties than pristine carboxymethyl chitosan particles. The effects of micro-droplets generation conditions on particles formation were systematically investigated. At conditions of 40 mg/ml of carboxymethyl chitosan, 2 mg/ml of graphene oxide, 3 ml/h of feed speed, electrostatic field parameters was 9 kV and 20 cm, uniformly sized carboxymethyl chitosan–graphene oxide particles in the diameter range of 250–300 μm was successfully prepared. In NaCl saline, these particles could maintain stable for at least a week, while pristine carboxymethyl chitosan particles quickly collapsed within an hour. The results of loading experiments showed that carboxymethyl chitosan–graphene oxide particles could effectively adsorb gatifloxacin, ofloxacin, bovine serum albumin, lysozyme, doxorubicin hydrochloride. And gatifloxacin was chosen as a model drug to study the exact effect of graphene oxide content on the loading and release properties. In 40:2 group, the highest loading capacity of 0.45 ± 0.19 mg/mg was achieved, and also a good sustained release was available. Above all, we believed that carboxymethyl chitosan–graphene oxide particles as a versatile carrier, has great potential in Medicine and Pharmacy. Graphical Abstract
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PubMed
高影响因子
COLLOID AND POLYMER SCIENCE
·
2023
·Vol. 301
·期 12
·1421-1436
·
IF 2.4
Shen Yiyue,Li Fahui,Deng Yupei,Chen Haoyuan,Zhang Jingchun,Wang Qiqi,Zhuang Linghua,Wang Guowei
Ionic liquid surfactant (ILS) shows potential application in surfactant foam enhancing oil recovery (SFEOR). The structure–activity relationship between structural characteristics and foam feature is vital for the design and selection of favorable ILS for SFEOR. In this paper, the effect of structural substituent groups of anionic ILSs on foam features was established from experimental methods and Density functional theory (DFT) simulations. Physicochemical features of two anionic ILSs, 3-butyl-1-ethoxycarbonylimidazolium dodecyl benzene sulfonate ([Etbim][DBS]) and 1-butyl-3-butylcarbonylimidazolium dodecyl benzene sulfonate ([Btbim][DBS]) was determined. By surface tensiometry, the critical micelle concentration (CMC) values of [Etbim][DBS] and [Btbim][DBS] were 0.324 mmol/L and 0.211 mmol/L respectively. Foam characteristic of two ILSs were studied, whose tendency followed: [Etbim][DBS] > [Btbim][DBS]. ILS hydrates showed tendency: [Etbim][DBS] (H 2 O) n < [Btbim][DBS] (H 2 O) n . Binding energy (D 0 ) values followed the tendency: [Etbim][DBS] (H 2 O) n > [Btbim][DBS] (H 2 O) n . Experimental and DFT results verified the introduction of longer ester alkyl chain length in imidazolium cation was adverse to foam features of ILSs. This information will help to screen new foam surfactants for SFEOR.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2020
·Vol. 31
·期 6
·5008-5016
·
IF 2.22
Peng Fang,Wang Shaojie,Yu Weiwei,Huang Tiantian,Sun Yan,Cheng Chuanwei,Chen Xin,Hao Jiaming,Dai Ning
Gas sensors with high performance and low energy consumption are necessary for system integration in the environment monitoring of explosives. High-performance room-temperature hydrogen sulfide (H 2 S) gas sensors were fabricated based on the hybrids of tungsten oxide (WO 3 )/reduced graphene oxide (rGO). WO 3 nanocubes modified with different contents of rGO were synthesized by acid-based hydrothermal method. The optimal amount of rGO in the composite is 5 wt%, at which the room-temperature operating sensor presents the highest sensitivity of approximately 32.7 to 500 ppb H 2 S, a fast recovery time of ~ 180 s, as well as an excellent sensing selectivity. The overall improvement in sensing performances demonstrated an important progress made in H 2 S sensor fabrication for portable and real-time gas detection. The improved gas-sensing performance is attributed to the large specific surface area of the WO 3 nanocubes, the formation of WO 3 /rGO heterojunctions, and the enhanced electron transfer efficiency.
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Electrocatalysis
·
2021
·Vol. 12
·期 4
·456-468
·
IF 2.713
Huang Dihui,Huang Xiaozhou,Chen Jinyang,Ye Ruihong,Lin Qian,Chen Sheng
This work constructed a new-type bisphenol A (BPA) electrochemical sensor on the basis of self-assembled multi-layer strategy of Ce-Zn-metal organic framework/multiwall carbon nanotube (Ce-Zn-MOF/MWCNT)–modified glassy carbon electrodes (GCE). The novel bimetallic Ce-Zn-MOF are synthesized by 1,3,5-benzenetricarboxylic acid (H 3 BTC) as the ligand via a hydrothermal approach. Bimetallic Ce-Zn-MOF with multiple catalytic sites and ultra-high specific surface area introduces traditional electrode modification materials, which improves the conductivity and catalytic ability of MWCNTs. Field emission scanning electron microscopy, transmission electron microscope and Powder X-ray diffraction were performed to analyze the Ce-Zn-MOF/MWCNTs. The electrochemical property was researched utilize differential pulse voltammetry (DPV), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). In the optimum conditions, the proposed sensor exhibited a wider dynamic linear range of BPA determination in 0.1 to 100 μmol·L −1 with a detection limit of 7.2 nmol·L −1 ( S / N = 3). This measurement of BPA was successfully used for drinking water with desirable recovery from 96.5 to 103.4%. Graphical Abstract
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CATALYSIS LETTERS
·
2019
·Vol. 150
·期 1
·209-221
·
IF 2.372
Xu Songlin,Zhang Mingyi,Guo Shujuan,Li Mengru,Huang Qingming,Chen Xiaohui
Abstract Diffusion limitation caused by microporous molecular sieves has always been a bottleneck problem in liquid phase epoxidation. In this study, several different carbon sources were used as hard templates to prepare hierarchically porous zeolite Ti-MWW (cTi-MWW) successfully. Compared with conventional Ti-MWW, cTi-MWW has an additional hierarchically porous structure and abundant pore structure distribution. Especially, the cTi-MWW prepared with polyethylene glycol1540 (PEG) as the hard template not only has a multiple hierarchically porous structure, but also exhibits small crystal size and good hydrophobicity properties studied by TEM and in situ FT-IR. At the same time, the cTi-MWW prepared with PEG exhibits better activity than the conventional Ti-MWW in the selective epoxidation reaction of allyl alcohol (AAL) with H 2 O 2 as oxidant and the conversion is improved by 11% (Si/Ti = 20). And a higher efficiency and longer catalyst life in fixed-bed catalytic reactor were exhibited by using cTi-MWW PEG as catalyst. The physicochemical properties of cTi-MWW prepared with different hard templates were systematically studied by SEM, XPS, UV–Vis, XRD and N 2 absorption–desorption techniques. This method is effective for the synthesis of cTi-MWW and significant for the preparation of hierarchically porous zeolites in industrial production. Graphic Abstract A hierarchically porous zeolite Ti-MWW prepared with different hard templates successfully. With the hierarchically porous structure, which have better adsorption, diffusion, and reactivity in liquid phase epoxidation, thus improving the catalytic activity. Especially, the hierarchically porous zeolite Ti-MWW prepared with polyethylene glycol exhibits small crystal size and good hydrophobicity properties.
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高影响因子
Nanoscale Research Letters
·
2017
·Vol. 12
·期 1
·1-12
·
IF 2.833
Xue Qingwen,Yao Weijing,Liu Jun,Tian Qingyong,Liu Li,Li Mengxiao,Lu Qiang,Peng Rui,Wu Wei
Silver nanowires (Ag NWs) are the promising materials to fabricate flexible transparent electrodes, aiming to replace indium tin oxide (ITO) in the next generation of flexible electronics. Herein, a feasible polyvinylpyrrolidone (PVP)-mediated polyol synthesis of Ag NWs with different aspect ratios is demonstrated and high-quality Ag NWs transparent electrodes (NTEs) are fabricated without high-temperature thermal sintering. When employing the mixture of PVP with different average molecular weight as the capping agent, the diameters of Ag NWs can be tailored and Ag NWs with different aspect ratios varying from ca. 30 to ca. 1000 are obtained. Using these as-synthesized Ag NWs, the uniform Ag NWs films are fabricated by repeated spin coating. When the aspect ratios exceed 500, the optoelectronic performance of Ag NWs films improve remarkably and match up to those of ITO films. Moreover, an optimal Ag NTEs with low sheet resistance of 11.4 Ω/sq and a high parallel transmittance of 91.6% at 550 nm are achieved when the aspect ratios reach almost 1000. In addition, the sheet resistance of Ag NWs films does not show great variation after 400 cycles of bending test, suggesting an excellent flexibility. The proposed approach to fabricate highly flexible and high-performance Ag NTEs would be useful to the development of flexible devices.
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PubMed
高影响因子
Nature Communications
·
2019
·Vol. 10
·期 1
·1-8
·
IF 11.878
Yang Yang,Zhang Shuai,Zhang Xiqi,Gao Longcheng,Wei Yen,Ji Yan
Vitrimers are one kind of covalently crosslinked polymers that can be reprocessed. Topology freezing transition temperature (T v ) is vitrimer’s upper limit temperature for service and lower temperature for recycle. However, there has been no proper method to detect the intrinsic T v till now. Even worse, current testing methods may lead to a misunderstanding of vitrimers. Here we provide a sensitive and universal method by doping or swelling aggregation-induced-emission (AIE) luminogens into vitrimers. The fluorescence of AIE-luminogens changes dramatically below and over T v , providing an accurate method to measure T v without the interference of external force. Moreover, according to this method, T v is independent of catalyst loading. The opposite idea has been kept for a long time. This method not only is helpful for the practical application of vitrimers so as to reduce white wastes, but also may facilitate deep understanding of vitrimers and further development of functional polymer materials.
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PubMed
高影响因子
Nano Research
·
2018
·Vol. 11
·期 7
·3648-3657
·
IF 7.994
Xu Jing,Jie Xu,Xie Fengfeng,Yang Haimei,Wei Weili,Xia Zhining
A new type of self-targeting carbon dot (CD-Fla) for the detection of the toxic heavy metal ion Pb 2+ was synthesized via a one-pot hydrothermal route using flavonoid extracts of Ginkgo biloba leaves as the starting material. As-prepared CD-Fla exhibited excellent biocompatibility and strong blue emission with a quantum yield of 16.1% and significant fluorescence quenching selectivity for Pb 2+ without using any additional targeting molecules. CD-Fla could detect Pb 2+ quantitatively within the range 0.1–20.0 nM, with an ultrahigh sensitivity of 55 pM. The selectivity of CD-Fla for Pb 2+ was nearly one order of magnitude higher than that for other relevant metal ions. This was much better than ever reported CD-based metal ion sensors. The high sensitivity and selectivity were due to the incorporation of certain flavonoid-like moieties into CD-Fla. CD-Fla was also demonstrated to be a good probe for fluorescence tracing of intracellular Pb 2+ . The capability of CD-Fla was further improved when it was doped on agarose hydrogel. CD-Fla-doped agarose hydrogel (CD-AHG) allowed for visual fluorescence detection and removal of Pb 2+ from water. This was confirmed by testing CD-AHG in actual water samples taken from the Jialing River (Chongqing, China). The Pb 2+ adsorbed CD-AHG was regenerable in HCl solution. This study will open a new avenue for synthesizing intelligent materials capable of simultaneously targeting, detecting, and treating heavy metal ions.
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高影响因子
COLLOID AND POLYMER SCIENCE
·
2016
·Vol. 295
·期 1
·1-12
·
IF 1.89
Qi Peilan,Bu Yongqiang,Xu Jing,Qin Benkai,Luan Shujuan,Song Shiyong
Many tumor cells have acidic microenvironment that can be exploited for the design of pH-responsive drug delivery systems. In this work, well-defined pH-sensitive and biodegradable polymeric micelles were prepared and evaluate as carrier of paclitaxel (PTX). A diblock copolymer constituting of a poly(ethylene glycol) (PEG) and a polycaprolactone (PCL) segment linked by a pH-sensitive hydrazone bond (Hyd), which was denoted as mPEG-Hyd-PCL, was synthesized. The copolymer was assembled to micelles with mean diameters about 100 nm. The mean diameters and size distribution of the hydrazone-containing micelles increased obviously in mildly acidic environments while kept unchanged in the neutral. No significant change in size was found on polymeric micelles without hydrazone (mPEG-PCL). PTX was loaded into micelles, and the anticancer drug released from mPEG-Hyd-PCL micelles was promoted by the increased acidity. In vitro cytotoxicity study showed that the PTX-loaded mPEG-Hyd-PCL micelles exhibited significantly enhanced cytotoxicity against HepG2 cells compared to the non-sensitive mPEG-PCL micelles. These results suggest that hydrazone-containing copolymer micelles with pH sensitivity and biodegradability show excellent potential as carriers of anticancer drugs.
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