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| 1 | Preparation and cytocompatibility of polylactic acid/hydroxyapatite/graphene oxide nanocomposite fibrous membrane显示文摘A series of polylactic acid (PLA) based nanocomposite fibrous membranes,including neat PLA,PLA/hydroxyapatite (HA) and PLA/HA/graphene oxide (GO),were fabricated via electrospinning method.The morphology and composition were investigated by scanning electron microscopy (SEM),X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) respectively.The thermal stability was determined by thermogravimetric analysis (TGA).To estimate the cytocompatibility of asprepared PLA/HA/GO fibrous membrane,MC3T3-E1 cells were cultured,and the corresponding cell adhesion and differentiation capability were investigated by fluorescence microscopy,SEM and MTT test.The electrospun ternary PLA/HA/GO membrane exhibited three-dimensional fibrous structure with relatively rough surface morphology,which made itself ideal for cell attachment and proliferation in bone tissue regeneration.The fluorescence microscopy,SEM and MTT test confirmed that the PLA/HA/GO nanocomposite fibrous membrane created a proper environment for the seeding and proliferation of MC3T3-E1 cells. | MA HaiBin SU WenXin TAI ZhiXin SUN DongFei YAN XingBin LIU Bin XUE QunJi | 2012 | Chinese Science Bulletin2012，57，23： | 11 |
| 2 | Cognitive improvement following transvenous adipose-derived mesenchymal stem cell transplantation in a rat model of traumatic brain injury显示文摘The effects of adipose-derived mesenchymal stem cell (ADMSC) transplantation for the repair of traumatic brain injury remain poorly understood. The present study observed neurological functional changes in a rat model of traumatic brain injury following ADMSC transplantation via the tail vein. Cell transplants were observed in injured cerebral cortex, and expression of brain-derived nerve growth factor was significantly increased in the injured hippocampus following transplantation. Results demonstrated that transvenous ADMSC transplants migrated to the injured cerebral cortex and significantly improved cognitive function. | Dongfei Li Chun Yang Rongmei Qu Huiying Yang Meichun Yu Hui Tao Jingxing Dai Lin Yuan | 2011 | Neural Regeneration Research2011，6，10： | 7 |
| 3 | Construction of bilayer PdSe2 on epitaxial graphene显示文摘Two-dimensional (2D) materials have received significant attention due totheir unique physical properties and potential applications in electronics andoptoelectronics. Recent studies have demonstrated that exfoliated PdSe2, alayered transition metal dichalcogenide (TMD), exhibits ambipolar field-effecttransistor (FET) behavior with notable performance and good air stability, andthus serves as an emerging candidate for 2D electronics. Here, we report thegrowth of bilayer PdSe2 on a graphene-SiC(0001) substrate by molecular beamepitaxy (MBE). A bandgap of 1.15±0.07 eV was revealed by scanning tunnelingspectroscopy (STS). Moreover, a bandgap shift of 0.2 eV was observed in PdSe2layers grown on monolayer graphene as compared to those grown on bilayergraphene. The realization of nanoscale electronic junctions with atomicallysharp boundaries in 2D PdSe2 implies the possibility of tuning its electronicor optoelectronic properties. In addition, on top of the PdSe2 bilayers, PdSe2nanoribbons and stacks of nanoribbons with a fixed orientation have beenfabricated. The bottom-up fabrication of low-dimensional PdSe2 structures isexpected to enable substantial exploration of its potential applications. | En Li Dongfei Wang Peng Fan Ruizi Zhang Yu-Yang Zhang Geng Li Jinhai Mao Yeliang Wang Xiao Lin Shixuan Du Hong-Jun Gao | 2018 | Nano Research2018，11，11： | 2 |
| 4 | 显示文摘 | DongFei(董飞) HeGuoqiang(何国强) ZhangGuitian(张贵田)eta1 | | 材料热处理0，，： | 1 |
| 5 | On ignition point of Mg-Ca alloy under nitrogen atmosphere显示文摘The production cost will be greatly reduced if nitrogen can be used instead of inert gas in the spray forming process of magnesium alloys, but the heat from the reaction between magnesium alloys and nitrogen makes magnesium alloy burn easily. To solve the problem above, the ignition point of Mg-Ca alloy under nitrogen atmosphere was studied using a home-made experimental device and DSC-DTA. Results show that under nitrogen atmosphere, Ca addition has a great effect on the ignition point of Mg alloy. The ignition point of the Mg-5Ca bulk even exceeds 1,030℃, and the alloy can be held for 30 min at 900℃ without burning;while the average ignition point of Mg-5Ca powders is lower than 700℃, and it increases with the increasing particle size. Moreover, the purity of nitrogen must be in a certain scope;Mg-Ca alloy shows a higher ignition point under nitrogen with a purity of 99.5%. Based on the experimental results, the best adding content of Ca and the purity of nitrogen were determined, and the security and economic performance of preparing magnesium alloys by spray deposition were improved with nitrogen as atomizing gas. | Tan Dunqiang Yang Xiaoxia Zhan Yijie Xiao Dongfei | 2011 | China Foundry2011，8，3： | 1 |
| 6 | Rapid CO_(2)-laser scribing fabrication of an electrochemical sensor for the direct detection of Pb^(2+) and Cd^(2+)显示文摘Laser-induced graphene(LIG)is a highly promising preparation material for electrochemical sensors;however,its preparation speed and nanomaterial modification steps significantly limit its mass production.Herein,this study proposed a new laser printing strategy that considerably improved the preparation speed of LIG with excellent electrochemical performance.Using the optimal parameters(laser power of 1%,scribing spacing of 0.12 mm,scribing speed of 100 mm·s^(−1)),it took only 14.2 s to complete the preparation of the detection electrode.Thus,we successfully detected Cd^(2+)and Pb^(2+)without any toxic reagents or electrode modification steps.The limits of detection of the sensor were 0.914 and 0.916μg·L^(−1)for Cd^(2+)and Pb^(2+),respectively,which are significantly lower than the required values for drinking-water quality,according to the World Health Organization guidelines.This study provides a novel approach for the rapid detection of heavy-metal ions. | Guanglei Chu Yanyan Zhang Zhongrui Zhou Weixuan Zeng Dongfei Chen Siping Yu Jiemin Wang Yemin Guo Xia Sun Ming Li | 2023 | Nano Research2023，16，5： | 1 |
| 7 | Recovery of edge states of graphene nanoislands on an iridium substrate by silicon intercalation显示文摘有限尺寸的 graphene 表例如 graphene nanoislands (GNI ) ,在基于 graphene 的 nanoelectronics 为实际应用正在答应候选人。有明确的之字形边的 GNI 被预言有之字形边 graphene nanoribbons 的类似于那些的极化纺纱的边状态,它能完成 graphene spintronics。然而,因为和使用的 substrate.We 的相互作用,金属底层上的 GNI 没有边状态,这被报导了扫描通道显微镜学的联合,光谱学,并且密度证明边在红外底层上 GNI 说的功能的理论计算能被设置恢复在 GNI 和底层之间的 Si 原子的层。我们也发现边状态逐渐地与增加岛尺寸变到费密水平。这个工作提供一个方法在金属底层上在高质量的 graphene nanostructures 调查极化纺纱的边状态。 | Hui Chen Yande Que Lei Tao Yu-Yang Zhang Xiao Lin Wende Xiao Dongfei Wang Shixuan Du Sokrates T. Pantelides Hong-Jun Gao | 2018 | Nano Research2018，11，7： | 1 |
| 8 | High performance supercapacitor electrode based on graphene paper via flame-induced reduction of graphene oxide paper显示文摘 | Sun Dongfei Yan Xingbin Lang Junwei | 2013 | J Power Sources2013，222，： | 1 |
| 9 | JOURNAL OF POWER SOURCES显示文摘 | Sun Dongfei Yan Xingbin Lang Junwei | 2012 | 2222012，5255，： | 1 |
| 10 | Fabrication of labscale hollow fiber membrane modules with high packing density显示文摘 | Li Dongfei Wang Rong Chung Taishtmg | 2004 | Sep and Purif Technol2004，40，： | 1 |
| 11 | High performance supercapacitor electrode based on graphene paper via flame-induced reduction of graphene oxide paper显示文摘 | Dongfei Sun Xingbin Yan Junwei Lang Qunji Xue | 2013 | Journal of Power Sources2013，，： | 1 |
| 12 | Transplanted adipose-derived stem cells delay D-galactose-induced aging in rats显示文摘To investigate the effects of allogeneically transplanted, adipose-derived stem cells in aging rats, in the present study, we established a rat model of subacute aging using continuous subcutaneous injections of D-galactose. Two weeks after the adipose-derived stem cells transplantations, serum superoxide dismutase activity was significantly increased, malondialdehyde content was significantly reduced, hippocampal neuronal degeneration was ameliorated, the apoptotic index of hippocampal neurons was decreased, and learning and memory function was significantly improved in the aging rats. These results indicate that allogeneic transplantation of adipose-derived stem cells may effectively delay D-galactose-induced aging. | Chun Yang Dongfei Li Zhongqiu Wen Huiying Yang Meichun Yu Hui Tao Rongmei Qu Yikuan Du Yong Huang Ou Sha Jingxing Dai Lin Yuan | 2011 | Neural Regeneration Research2011，6，34： | 1 |
| 13 | Bandgap broadening at grain boundaries in single-layer MoS2显示文摘Two-dimensional semiconducting transition-metal dichalcogenides have attractedconsiderable interest owing to their unique physical properties and futuredevice applications. In particular, grain boundaries (GBs) have been oftenobserved in single-layer MoS2 grown via chemical vapor deposition, which cansignificantly influence the material properties. In this study, we examined theelectronic structures of various GBs in single-layer MoS2 grown on highlyoriented pyrolytic graphite using low-temperature scanning tunneling microscopy/spectroscopy. By measuring the local density of states of a series of GBs with tiltangles ranging from 0° to 25°, we found that the bandgaps at the GBs can beeither broadened or narrowed with respect to the intrinsic single-layer MoS2.The bandgap broadening shows that the GBs can become more insulating,which may directly influence the transport properties of nanodevices based onpolycrystalline single-layer MoS2 and be useful for optoelectronics. | Dongfei Wang Hua Yu Lei Tao Wende Xiao Peng Fan Tingting Zhang Mengzhou Liao Wei Guo Dongxia Shi Shixuan Du Guangyu Zhang Hongjun Gao | 2018 | Nano Research2018，11，11： | 1 |
| 14 | Facet effect on the reconstructed Cu-catalyzed electrochemical hydrogenation of 5-hydroxymethylfurfural(HMF) towards 2,5-bis(hydroxymethy)furan (BHMF)显示文摘The electrochemical hydrogenation of HMF to BHMF is an elegant alternative to the conventio nal thermocatalytic route for the production of high-value-added chemicals from biomass resources.In virtue of the wide potential window with promising Faradic efficiency(FE) towards BHMF,Cu-based electrode has been in the center of investigation.However,its structure-activity relationship remains ambiguous and its intrinsic catalytic activity is still unsatisfactory.In this work,we develop a two-step oxidation-reduction strategy to reconstruct the surface atom arrangement of the Cu foam(CF).By combination of multiple quasi-situ/in-situ techniques and density functional theory(DFT) calculation,the critical factor that governs the reaction is demonstrated to be facet effect of the metallic Cu crystal:Cu(110) facet accounts for the most favorable surface with enhanced chemisorption with reactants and selective production of BHMF,while Cu(100) facet might trigger the accumulation of the by-product 5,5'-bis(hydroxy methy)hydrofurion(BHH).With the optimized composition of the facets on the reconstructed Cu(OH)_(2)-ER/CF,the performance could be noticeably enhanced with a BHMF FE of 92.3% and HMF conversion of 98.5% at a potential of -0.15 V versus reversible hydrogen electrode(vs.RHE) in 0.1 M KOH solution.This work sheds light on the incomplete mechanistic puzzle for Cu-catalyzed electrochemical hydrogenation of HMF to BHMF,and provides a theoretical foundation for further precise design of highly efficient catalytic electrodes. | Mengxia Li Tianxi Zheng Dongfei Lu Shiwei Dai Xin Chen Xinchen Pan Dibo Dong Rengui Weng Gang Xu Fanan Wang | 2023 | Journal of Energy Chemistry2023，，9： | 1 |
| 15 | Interlayer and doping engineering in partially graphitic hollow carbon nanospheres for fast sodium and potassium storage显示文摘Constructing anodes with fast ions/electrons transfer paths is an effective strategy to achieve high-performance sodium ion batteries(SIBs)/potassium ion batteries(PIBs). Amorphous carbon is a promising candidate anode for SIBs/PIBs owing to its disordered carbon layers, abundant defects/pores, and lowcost resources. However, the larger radius of Na^(+)/K^(+) leading to depressed kinetics and poor cycling performance, impeding their further applications. Herein, we propose an efficient strategy to construct of nitrogen, sulfur co-doped hollow carbon nanospheres(NS-HCS) involving an in situ growth of polydopamine on nano-Ni(OH)2template with subsequent sulfur doping process. During the formation process, the produced Ni nanospheres play as the hard template and catalyst for the formation of hollow carbon nanosphere with partially graphite microcrystalline structure, while the sulfur doping process can enlarge the interlayer space and create more defects on the surface of carbon nanospheres, thus synchronous improve the Na^(+)/K^(+) insertion and adsorption ability in NS-HCS. With the synergistic control of the enlarged interlayer spacing, high content of pyridinic N/pyrrolic N and graphitization, a hybrid storage mechanism facilitates the transport kinetics and endows the NS-HCS electrode with high capacities and good cycling stability in SIBs and PIB. Benefit from the multiple effects, NS-HCS exhibits the improved capacity of 274.8 m Ah/g at 0.1 A/g and excellent cycling stability of 149.5 m Ah/g after 5000 cycles at2.5A/g in SIBs, as well as good potassium ion storage behavior with a high capacity retention of 76.5%after 700 cycles at 1.0 A/g, demonstrating the potential applications of NS-HCS for high-performance SIBs and PIBs. | Dongfei Sun Sen Lin Dandan Yu Zijuan Wang Fangfang Deng Xiaozhong Zhou Guofu Ma Ziqiang Lei | 2023 | Chinese Chemical Letters2023，34，2： | 0 |
| 16 | T-shaped trifunctional crosslinker-toughening hydrogels显示文摘Currently, development of a single network hydrogel with a high fracture toughness in swelling equilibrium remains challenging.In this work, a novel T-shaped trifunctional crosslinker(T-NAGAX) with dual vinyl on the backbone and dual amide group on the side chain is synthesized by Michael addition and acylation. The T-NAGAX is used to prepare chemically crosslinked hydrogel by one-pot photo-initiated polymerization. The resulting single network hydrogels of representative polyacrylamide(PAAm), poly(N-acryloyl 2-glycine)(PACG), and poly(N-isopropyl acrylamide)(PNIPAM) crosslinked with T-NAGAX with additional hydrogen-bonds exhibit much better fracture toughness than that of the corresponding hydrogels crosslinked by N,N'-methylene bisacrylamide, a conventional crosslinker;higher mechanical strengths are observed in the T-NAGAX crosslinked hydrogels. These hydrogels are promising to be exploited as load-bearing soft tissue substitutes. This T-NAGAX crosslinker can be expanded to toughen various types of hydrogels. | Ll QingYu XU ZiYang ZHANG DongFei YANG JianHai LIU WenGuang | 2020 | Science China(Technological Sciences)2020，63，9： | 0 |
| 17 | A Series of Pure Orange-yellow Iridium Complexes with Low Efficiency Roll-off: a Computational Study显示文摘 | SONG Mingxing HUANG Jian BAI Fuquan WANG Chunxu LIU Hongbo WANG Jin LI Dongfei QIN Zhengkun | 2016 | Chemical Research in Chinese Universities2016，32，3： | 0 |
| 18 | Fabrication and manipulation of nanosized graphene homojunction with atomically-controlled boundaries显示文摘Controlling the atomic configurations of structural defects in graphene nanostructures is crucial for achieving desired functionalities.Here,we report the controlled fabrication of high-quality single-crystal and bicrystal graphene nanoislands(GNI)through a unique top-down etching and post-annealing procedure on a graphite surface.Low-temperature scanning tunneling microscopy(STM)combined with density functional theory calculations reveal that most of grain boundaries(GBs)formed on the bicrystal GNIs are 5-7-5-7 GBs.Two nanodomains separated by a 5-7-5-7 GB are AB stacking and twisted stacking with respect to the underlying graphite substrate and exhibit distinct electronic properties,forming a graphene homojunction.In addition,we construct homojunctions with alternative AB/twisted stacking nanodomains separated by parallel 5-7-5-7 GBs.Remarkably,the stacking orders of homojunctions are manipulated from AB/twist into twist/twist type through a STM tip.The controllable fabrication and manipulation of graphene homojunctions with 5-7-5-7 GBs and distinct stacking orders open an avenue for the construction of GBs-based devices in valleytronics and twistronics. | Hui Chen De-Liang Bao Dongfei Wang Yande Que Wende Xiao Yu-Yang Zhang Jiatao Sun Shixuan Du Hong-Jun Gao | 2020 | Nano Research2020，13，12： | 0 |
| 19 | Discovery of Majorana Bound State in Fe-based Superconductor显示文摘In 1937, Italian theoretical physicist Ettore Majorana published a paper, in which he made a brilliant discovery by decomposing Dirac equation into the real and imaginary parts. That is the famous equation describing the motion of a Majorana fermion whose antiparticle is itself. | WANG Dongfei KONG Lingyuan FAN Pen GAO Hongjun DING Hong Genda Gu Liang Fu | 2018 | Bulletin of the Chinese Academy of Sciences2018，32，4： | 0 |
| 20 | Real-time imaging of structure and dynamics of transmembrane biomolecules by FRET-induced single-molecule fluorescence attenuation显示文摘Tracking the transmembrane topology and conformational dynamics of membrane proteins is key to understand their functions.It is however challenging to monitor position changes of individual proteins in cell membranes with high sensitivity and high resolution.We review on three single-molecule fluorescence imaging methods—SIFA,Lipo FRET and Queen FRET—recently developed in our lab for studying the dynamics of membrane proteins.They can be applied,progressively,to investigate membrane proteins in solid-supported lipid bilayers,artificial liposome membranes and live-cell plasma membranes.The techniques take advantage of the energy transfer from a fluorophore to a cloud of quenchers and are able to extract in real time positions and position changes of a single fluorophorelabeled protein in the direction normal to the membrane surface.The methods have sub-nanometer precision and have proved powerful to investigate biomolecules interacting with bio-membranes. | Dongfei Ma Wenqing Hou Chenguang Yang Shuxin Hu Weijing Han Ying Lu | 2021 | Biophysics Reports2021，7，6： | 0 |
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