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| 1 | An innovative joint interface design for reducing intermetallic compounds and improving joint strength of thick plate friction stir welded Al/Mg joints显示文摘Friction stir welding of dissimilar Al/Mg thick plates still faces severe challenges, such as poor formability, formation of thick intermetallic compounds, and low joint strength. In this work, two joint configurations, namely inclined butt(conventional butt) and serrated interlocking(innovative butt), are proposed for improving weld formation and joint quality. The results show that a continuous and straight intermetallic compound layer appears at the Mg side interface in conventional butt joint, and the maximum average thickness reaches about 60.1 μm.Additionally, the Mg side interface also partially melts, forming a eutectic structure composed of Mg solid solution and Al_(12)Mg_(17) phase.For the innovative butt joint, the Mg side interface presents the curved interlocking feature, and intermetallic compounds can be reduced to less than 10 μm. The joint strength of innovative butt joint is more than three times that of conventional butt joint. This is due to the interlocking effect and thin intermetallic compounds in the innovative joint. | Yang Xu Liming Ke Yuqing Mao Jifeng Sun Yaxiong Duan Limin Yu | 2023 | Journal of Magnesium and Alloys2023，11，9： | 0 |
| 2 | 氧化石墨烯膜/PET纳米孔中的离子选择性增强传输显示文摘Graphene oxide(GO)has become a promising 2D material in many areas,such as gas separation,seawater desalination,antibacterial materials and so on due to its abundant oxygen-containing functional groups and excellent dispersibility in various solvents.The graphene oxide membrane(GOM),a laminar and channel-rich structure assembled by stacked GO nanosheets,served as a kind of precise and ultrafast separation material has attracted widespread attention in membrane separation field.In this work,we adopted the spin-coating method to obtain the GOM/PET system and this system exhibited both enhanced cation transport properties and higher rectification ratio than those of pure PET conical nanopore. | Dong Yuhua Cheng Yaxiong Xu Guoheng Cheng Hongwei Huang Kejing Duan Jinglai Mo Dan Zeng Jian Bai Jing Sun Youmei Liu Jie Yao Huijun | 2018 | IMP & HIRFL Annual Report2018，，1： | 0 |
| 3 | A sensitization strategy for highly efficient blue fluorescent organic light-emitting diodes显示文摘Highly efcient blue fuorescent materials have recently attracted great interest for organic light-emitting diode(OLED)application.Here,two new pyrene based organic molecules consisting of a highly rigid skeleton,namely SPy and DPy,are developed.These two blue light emitters exhibit excellent thermal stability.The experiment reveals that the full-width at half-maximum(FWHM)of the emission spectrum can be tuned by introducing diferent amounts of 9,9-diphenyl-N-phenyl9H-fuoren-2-amine on pyrene units.The FWHM of the emission spectrum is only 37 nm in diluted toluene solution for DPy.Furthermore,highly efcient blue OLEDs are obtained by thermally activated delayed fuorescence(TADF)sensitization strategy.The blue fuorescent OLEDs utilizing DPy as emitters achieve a maximum external quantum efciency(EQE)of 10.4%with the electroluminescence(EL)peak/FWHM of 480 nm/49 nm.Particularly,the EQE of DPy-based device is boosted from 2.6%in non-doped device to 10.4%in DMAc-DPS TADF sensitized fuorescence(TSF)device,which is a 400%enhancement.Therefore,this work demonstrates that the TSF strategy is promising for highly efcient fuorescent OLEDs application in wide-color-gamut display feld. | Yalei Duan Runda Guo Yaxiong Wang Kaiyuan Di Lei Wang | 2022 | Frontiers of Optoelectronics2022，15，4： | 0 |
| 4 | Preparation of Sub-Nanoporous in Polymer Membranes显示文摘Owing to the strong confinement effect of angstrom-scale space,the behavior of ionic transport in sub-nanoporous materials can be very differ from in nanoporous counterparts and bulk. | Cheng Yaxiong Duan Jinglai Mo Dan Chen Yonghui Sun Youmei Liu Jie Yao Huijun | 2019 | IMP & HIRFL Annual Report2019，，1： | 0 |
| 5 | MeV能量重离子辐照金纳米线的产生层错四面体研究显示文摘Nanomaterials have received immense interest in recent years due to their vast applications in modern technology.It has been shown that the properties of nanomaterials are quite different from their bulk counterparts,due to their enhanced surface effects,high interface-to-volume ratio,and small size.The interaction between energetic ions and solids has been extensively studied for many years.Recently,a study on the MeV-heavy ion irradiation of gold nanowires in different diameter carried out by our group indicated that the energetic heavy ion irradiation could generate stacking fault tetrahedron(SFT)in gold nanowire,which may heavily affect its lattice structure and electrical properties.In this work,we mainly focus on the irradiation induced SFTs in gold nanowire,as well as its size distributions. | Cheng Yaxiong Yao Huijun Duan Jinglai Xu Lijun Zhai Pengfei Lyu Shuangbao Chen Yonghui Khan Maaz Mo Dan Sun Youmei Liu Jie | 2017 | IMP & HIRFL Annual Report2017，，1： | 0 |
| 6 | 4-17 Molecular Dynamics Simulation Studies of Crater Formation at the Surface of Gold Nanowire显示文摘Previous works which studied the effects of cascade occurred at the metal surface indicate that,in case of most energy of the incident ion is deposited in the vicinity of the surface,the pronounced damage caused by viscous flow or by microexplosion can lead to creation of large number of adatoms and vacancy dislocation loops beneath the surface[1,2],or even formation of craters on the surface[3-6].Bombardment with PKAs of kinetic energy higher than 10 keV will lead to the crater formation at the surface of nanowires.Fig. | Liu Wenqiang Duan Jinglai Cheng Yaxiong Yao Huijun Liu Jie | 2016 | IMP & HIRFL Annual Report2016，，1： | 0 |
| 7 | 4-25 Tuning the Coercivity of Cu/Ni Multilayer Nanowire Arrays by Tailoring Multiple Parameters显示文摘In recent years,the magnetic multilayered nanomaterials have been extensively studied for electronics[1],ultra high tensile strength[2],high storage media[3],and microwave devices[4]since the giant magnetoresistance(GMR)effect was found in 1988.As a member of 1D nanostructured materials,the ferromagnetic and nonmagnetic multilayer nanowires also exhibit tremendous potential applications in many fields due to their unique magnetic and electrical properties.In this work,the Cu/Ni multilayer nanowire arrays are prepared in ion track template with electrodeposition method and a new facile method is first introduced to easily confirm the different layer thickness and component by removing the nonmagnetic layer of Cu. | Yao Huijun Xie Lu Cheng Yaxiong Duan Jinglai Chen Yonghui Lu Shuangbao Sun Youmei Liu Jie | 2016 | IMP & HIRFL Annual Report2016，，1： | 0 |
| 8 | 4-27 Study the Rectification Effect of Single Graphene/PET Nanopore显示文摘Solid state nanopores or nanochannels prepared in polymer[1;2]and semiconductor films[3]have shown interesting transport phenomena,because of their diameters at the nanoscale and positive or negative charges on their walls.Graphene is an ideal material for developing solid state nanopores not only due to its atomic scale thickness,high mechanical strength and chemical stabilities but also because of the impermeability of the pristine single layer graphene to all atoms and molecules except protons[4].As the single Graphene/PET(G/PET)nanopore is the elementary building block for nanoporous membrane,the understanding and control of its individual ionic transport properties are also crucial in protein separation,water desalination,and bio-molecule detection using arrays of identical nanopores.Here,the single G/PET nanopore was successfully prepared by using ion irradiation technology and asymmetric etching method[5]and the corresponding ionic transport properties were investigated in detail. | Yao Huijun Xie Lu Cheng Yaxiong Duan Jinglai Chen Yonghui Lü Shuangbao Sun Youmei Liu Jie | 2016 | IMP & HIRFL Annual Report2016，，1： | 0 |
| 9 | 4-28 Surface Modification and Damage of MeV-Energy Heavy Ion Irradiation on Gold Nanowires显示文摘Recently,the irradiation effects in nanomaterials have been a hot topic in nanoscience.Although irradiationinduced damages have been studying for a long time,very limited research has been performed on the damages induced by MeV-energy heavy ions in gold nanowires(NWs).In this work,we report a study of the irradiation effects on single crystalline gold NWs,which are fabricated electrochemically in the etched ion track templates.The as-prepared gold NWs on the Au/Cu substrate were characterized by SEM after dissolving the polycarbonate(PC)template,as shown in Fig.1(a).Gold NWs with diameters from 20 to 90 nm were fabricated to study the size dependence of irradiation damage induced by the heavy ions.To guarantee that the different NWs could obtain the same irradiation fluence,the NWs with different diameters were mixed together and transferred to the TEM grid,as shown in Fig.1(b). | Cheng Yaxiong Yao Huijun Duan Jinglai Xu Lijun Zhai Pengfei Lü Shuangbao Chen Yonghui Khan Maaz Mo Dan Sun Youmei Liu Jie | 2016 | IMP & HIRFL Annual Report2016，，1： | 0 |
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