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| 1 | Progress in additive manufacturing on new materials: A review显示文摘Recent efforts and advances in additive manufacturing(AM) on different types of new materials are presented and reviewed. Special attention is paid to the material design of cladding layers, the choice of feedstock materials, the metallurgical behavior and synthesis principle during the AM process, and the resulted microstructures and properties, as well as the relationship between these factors. Thereafter,the trend of development in the future is forecasted, including: Effects of the particles size and size distribution of powders; Approaches for producing fine microstructures; Opportunities for creating new materials by AM; Wide applications in reconditioning of damaged components; Challenges for deep understanding and applications of the AMed new materials. The idea of 'Develop Materials' or 'Create Materials' by AM is highlighted, but a series of scientific, technological and engineering problems remain to be solved in future. | Neng Li Shuai Huang Guodong Zhang Renyao Qin Wei Liu Huaping Xiong Gongqi Shi Jon Blackburn | 2019 | Journal of Materials Science & Technology2019，35，2： | 47 |
| 2 | Congenital expression of mdr-1 gene in tissues of carcinoma and its relation with patho morphology and prognosis显示文摘NTRODUCTIONMultidrugresistance(MDR)ofmalignanttumorcelhasarousedwidespreadinterest.IthasbeenshownthatMDRispresentinmanymalign... | ZHANG Li Jian 1, CHEN Ke Neng 1, XU Guang Wei 1, XING Hai Ping 2 and SHI Xiao Tian 2 | 1999 | World Journal of Gastroenterology1999，5，1： | 15 |
| 3 | The Intervention Effect of Rosiglitozone in Ovarian Fibrosis of PCOS Rats显示文摘Objective To explore the Intervention effect of Rosiglitozone in ovarian fibrosis of PCOS rats.Methods 60 female SD rats were randomly divided into 3 groups:control group,model group and treatment group.The model and treatment groups were established by subcutaneous injection of DHEA,while the treatment group was given RGZ.The serum hormone values,pathohistology of ovarian structure of rats,ovarian ultrastructure and the expressions of TGF-β 1 and CTGF were detected.Results The PCOS model was established successfully.The expression intensity of TGF-β 1 and CTGF in Oocytes of the PCOS groups was 9.545±2.954 and 9.665±2.400,respectively and was significantly higher than that of the control group 6.636±2.264 and 7.036±2.133;after treatment with rosiglitazone,the expression was significantly decreased 6.980±2.421 and 6.642±2.721 as compared with that of the model group (P<0.05,P<0.001).The values in serum of the PCOS groups were 3.749±2.054 and 0.265±0.129,and 1.914±1.801 and 0.096±0.088 in the control group which had statistically significant difference (P<0.05,P<0.001).After treatment with rosiglitazone,the values were 2.3100±1.825 and 0.112±0.187 and were significantly different with those of the model group (P<0.05,P<0.001).Conclusion TGF-β 1 and CTGF play an important role in the development of ovary fibrosis in PCOS.However,RGZ may postpone the development of fibrosis by decreasing the levels of TGF-β 1 and CTGF. | MIAO Zhu Lin GUO Liang WANG Yong Xia CUI Rong YANG Ning HUANG Mi Qiong QIN Wei Bing CHEN Jin LI Hong Mei WANG Zi Neng WEI Xiang Cai | 2012 | Biomedical and Environmental Sciences2012，25，1： | 14 |
| 4 | Unravelling charge carrier dynamics in protonated g-C3N4 interfaced with carbon nanodots as co-catalysts toward enhanced photocatalytic CO2 reduction: A combined experimental and first-principles DFT study显示文摘在这个工作,我们表明了没有金属的 zerodimensional/ 的成功的构造二维的碳 nanodot (CND )-hybridized protonated g-C 3 N 4(pCN )(CND/pCN ) 借助于静电的吸引力的异质接面光催化剂。我们试验性地发现有 4.4 nm 的一条平均直径的 CND 在用电子显微镜学分析的 pCN 的表面上是一致地分布式的。有 3 wt.% 的一个 CND 内容的 CND/pCN-3 样品在可见、模仿的太阳的光下面在 CO 2 光致还原过程显示出最高催化的活动。这个过程导致在可见光的活动的 10 h 被发现是 29.23 和 58.82 摩尔 ? 以后, CH 4 和公司的全部的数量由 CND/pCN-3 光催化剂产生了的 CH 4 和公司的进化 ? 挠潲獳氭湩敫 ? 牧灡敨敮 ?????? ?? 吗?? | Wee-Jun Ong Lutfi Kurnianditia Putri Yoong-Chuen Tan Lling-Lling Tan Neng Li Yun Hau Ng Xiaoming Wen Siang-Piao Chai | 2017 | Nano Research2017，10，5： | 11 |
| 5 | Celastrol induces lipophagy via the LXRα/ABCA1 pathway in clear cell renal cell carcinoma显示文摘Celastrol is a triterpene derived from the traditional Chinese medicine Tripterygium wilfordii Hook f,which displays potential anticancer activity.In the present study,we investigated the anticancer effects of celastrol against clear cell renal cell carcinoma(ccRCC)and the underlying mechanisms.Using Cancer Genome Atlas(TCGA)database and genotype-tissue expression(GTEx)database we conducted a bioinformatics analysis,which showed that the mRNA levels of liver-X receptorsα(LXRα)and ATP-binding cassette transporter A1(ABCA1)in ccRCC tissues were significantly lower than those in adjacent normal tissues.This result was confirmed by immunoblotting analysis of 4 ccRCC clinical specimens,which showed that the protein expression of LXRαand ABCA1 was downregulated.Similar results were obtained in a panel of ccRCC cell lines(786-O,A498,SN12C,and OS-RC-2).In 786-O and SN12C cells,treatment with celastrol(0.25–2.0μM)concentration-dependently inhibited the cell proliferation,migration,and invasion as well as the epithelial-mesenchymal transition(EMT)process.Furthermore,we demonstrated that celastrol inhibited the invasion of 786-O cells through reducing lipid accumulation;celastrol concentration-dependently promoted autophagy to reduce lipid storage.Moreover,we revealed that celastrol dramatically activated LXRαsignaling,and degraded lipid droplets by inducing lipophagy in 786-O cells.Finally,celastrol promoted cholesterol efflux from 786-O cells via ABCA1.In high-fat diet-promoted ccRCC cell line 786-O xenograft model,administration of celastrol(0.25,0.5,1.0 mg·kg^(−1)·d^(−1),for 4 weeks,i.p.)dose-dependently inhibited the tumor growth with upregulated LXRαand ABCA1 protein in tumor tissue.In conclusion,this study reveals that celastrol triggers lipophagy in ccRCC by activating LXRα,promotes ABCA1-mediated cholesterol efflux,suppresses EMT progress,and ultimately inhibits cell proliferation,migration,and invasion as well as tumor growth.Thus,our study provides evidence that celastrol can be used as a lipid metabolism-based anticancer therapeutic approach. | Chan-juan Zhang Neng Zhu Jia Long Hong-tao Wu Yu-xiang Wang Bi-yuan Liu Duan-fang Liao Li Qin | 2021 | Acta Pharmacologica Sinica2021，42，9： | 8 |
| 6 | Synthesis, mechanical investigation, and application of nitrogen and phosphorus co-doped carbon dots with a high photoluminescent quantum yield显示文摘有高 photoluminescent 量收益(PLQY ) 的做 Heteroatom 的碳点(CD ) 最近在化学传感器,光催化, bioimaging,和药交货中由于他们的应用吸引了注意。氮和磷在到在周期表的碳的靠近的最近并且是关键的在生物医学的成像的地里追踪元素。这二个元素改变 CD 的光、电子的性质并且帮助改进他们的 PLQY 的基本理解。这能也在 photoimaging 和 photothermal 治疗导致多功能的用法。然而,源于做 P 的 CD 的合成的大多数 PLQY 当前低于 50% 。这些 CD 在 bioimaging 和药交货的地里限制了实用性。在这研究,一个单个步的、高效率的热水的方法被使用综合氮和磷药的碳点((N, P ) 有有独立排放的多达 53.8% 的 PLQY 的 -CDs) 行为。而且, CD 在一个大 pH 范围上介绍了高 monodispersity,柔韧的刺激无关的光,和稳定性。分光镜的调查显示 PLQY (N, P ) CD 主要由于 P 的增加和氧化表面的钝化效果。优秀荧光性质(N, P ) CD 能被 Hg 2+ 离子有效地并且有选择地熄灭。如此的系统与一短反应时间在 0-900 nM 集中范围显示出线性回答,显示他们为化学和生物学的领域里的应用程序的潜力。 | Quan Xu Bofan Li Yingchun Ye Wei Cai Weijun Li Chuanyao Yang Yusheng Chen Meng Xu Neng Li Xusheng Zheng Jason Street Yan Luo Lulu Cai | 2018 | Nano Research2018，11，7： | 7 |
| 7 | Enhanced Vitamin C Production Mediated by an ABA-Induced PTP-like Nucleotidase Improves Plant Drought Tolerance in Arabidopsis and Maize显示文摘Abscisic acid(ABA)is a key phytohormone that mediates environmental stress responses.Vitamin C,or L-ascorbic acid(AsA),is the most abundant antioxidant protecting against stress damage in plants.How the ABA and AsA signaling pathways interact in stress responses remains elusive.In this study,we characterized the role of a previously unidentified gene,PTPN(PTP-like Nucleotidase)in plant drought tolerance.In Arabidopsis,(AtPTPN was expressed in multiple tissues and upregulated by ABA and drought treatments.Loss-of-function mutants oiAtPTPN were hyposensitive to ABA but hypersensitive to drought stresses,whereas plants with enhanced expression AtPTPN showed opposite phenotypes to.Overexpression of maize PTPN(ZmPTPN)promoted,while knockdown oiZmPTPN inhibited plant drought tolerance,indicating conserved and positive roles of PTPN in plant drought tolerance.We found that both AtPTPN and ZmPTPN release Pi by hydrolyzing GDP/GMP/dGMP/IMP/dIMP,and that AtPTPN positively regulated AsA production via endogenous Pi content control.Consistently,overexpression of VTC2,the rate-limiting synthetic enzyme in AsA biosynthesis,promoted AsA production and plant drought tolerance,and these effects were largely dependent on AtPTPN activity.Furthermore,we demonstrated that the heat shock transcription factor HSFA6a directly binds the AtPTPN promoter and activates AtPTPN expression.Genetic analyses showed that AtPTPN is required for HSFA6a to regulate ABA and drought responses.Taken together,our data indicate that PTPN-mediated crosstalk between the ABA signaling and AsA biosynthesis pathways positively controls plant drought tolerance. | Hui Zhang Yanli Xiang Neng He Xiangguo Liu Hongbo Liu Liping Fang Fei Zhang Xiaopeng Sun Delin Zhang Xingwang Li William Terzaghi Jianbing Yan Mingqiu Dai | 2020 | Molecular Plant2020，13，5： | 7 |
| 8 | Red/orange dual-emissive carbon dots for pH sensing and cell imaging显示文摘The dual-emissive N,S co-doped carbon dots (N,S-CDs) with a long emission wavelength were synthesized via solvothermal method.The N,S-CDs possess relatively high photoluminescence (PL) quantum yield (QY) (35.7%) towards near-infrared fluorescent peak up to 648 nm.With the advanced characterization techniques including X-ray photoelectron spectroscopy (XPS),Fourier transform infrared spectroscopy (FTIR),etc.It is found that the doped N,S elements play an important role in the formation of high QY CDs.The N,S-CDs exist distinct pH-sensitive feature with reversible fluorescence in a good linear relationship with pH values in the range of 1.0-13.0.What is more,N,S-CDs can be used as an ultrasensitive Ag+ probe sensor with the resolution up to 0.4 μM.This finding will expand the application of as prepared N,S-CDs in sensing and environmental fields. | Miaoran Zhang Rigu Su Jian Zhong Ling Fei Wei Cai Qingwen Guan Weijun Li Neng Li Yusheng Chen Lulu Cai Quan Xu | 2019 | Nano Research2019，12，4： | 6 |
| 9 | Cooperation of invariant NKT cells and CD4+CD25+ T regulatory cells in prevention of autoimmune diabetes in non-obese diabetic mice treated with α- galactosylceramide显示文摘 | Weipeng Li Fang Ji Yong Zhang Ying Wang Neng Yang Hailiang Ge Fuqing Wang | 2008 | Acta Biochimica et Biophysica Sinica2008，40，5： | 5 |
| 10 | Microstructure Characteristics and Mechanical Properties of Nb-17Si-23Ti Ternary Alloys Fabricated by In Situ Reaction Laser Melting Deposition显示文摘Fabrication of ternary Nb–17 Si–23 Ti alloys was attempted by in situ reaction laser melting deposition(LMD)with dual powder feeding method from Nb-28 at.% Ti powder mixture and pure Si powder. The microstructures of the asdeposited alloys were examined with scanning electronic microscope, and the phase constituents were analyzed by X-ray energy-dispersive spectrometer and X-ray diffraction. Furthermore, the effect of laser power on microstructure characteristics, microhardness and indentation fracture toughness was also investigated. The in situ reaction LMD process resulted in remarkable refinement of the microstructure. The as-deposited samples mainly consisted of NbSS,metastable(Nb Ti)3 Si and Ti-rich NbSS. With the increase in the laser power from 1000 to 2000 W, the NbSSmorphology changed from discontinuous dendritic to near equiaxed, but the Ti-rich NbSSphase tended to vanish. Furthermore, with the increase in the laser power, the microhardness of as-deposited samples increased from 822 to 951 HV, while the indentation fracture toughness was improved from 12.3 to 14.1 MPa m1/2. The corresponding mechanism is also discussed. | Wei Liu Hua-Ping Xiong Neng Li Shao-Qing Guo Ren-Yao Qin | 2018 | Acta Metallurgica Sinica(English Letters)2018，31，4： | 5 |
| 11 | A flow cytometer based protocol for quantitative analysis of bloom-forming cyanobacteria(Microcystis) in lake sediments显示文摘A quantitative protocol for the rapid analysis of Microcystis cells and colonies in lake sediment was developed using a modified flow cytometer,the CytoSense.For cell enumeration,diluted sediment samples containing Microcystis were processed with sonication to disintegrate colonies into single cells.An optimized procedure suggested that 5 mg dw(dry weight)/mL dilution combined with 200 W × 2 min sonication yielded the highest counting efficiency.Under the optimized determination conditions,the quantification limit of this protocol was 3.3×10 4 cells/g dw.For colony analysis,Microcystis were isolated from the sediment by filtration.Colony lengths measured by flow cytometry were similar to those measured by microscopy for the size range of one single cell to almost 400 μm in length.Moreover,the relationship between colony size and cell number was determined for three Microcystis species,including Microcystis flos-aquae,M.aeruginosa and M.wessenbergii.Regression formulas were used to calculate the cell numbers in differentsized colonies.The developed protocol was applied to field sediment samples from Lake Taihu.The results indicated the potential and applicability of flow cytometry as a tool for the rapid analysis of benthic Microcystis.This study provided a new capability for the high frequency monitoring of benthic overwintering and population dynamics of this bloom-forming cyanobacterium. | Quan Zhou Wei Chen Huiyong Zhang Liang Peng Liming Liu Zhiguo Han Neng Wan Lin Li Lirong Song | 2012 | Journal of Environmental Sciences2012，24，9： | 5 |
| 12 | Novel lignans from the stems and leaves of Trachelospermum jasminoides显示文摘5-methoxydibenzylhydroxybutyrolactone lignans 说出 5-methoxytracheloside 和 5-methoxytrachelogenin 的二篇小说从 Trachelospermum jasminoides ( Lindl )的茎和叶子被孤立 Lem ,他们的结构是被决定( 8S , 8S )-8-hydroxy-3, 3 , 4 , 5-tertramethoxylignan-9 , 9-olide-4-O--d-glucopyranoside 并且( 8S , 8S )-4, 8-dihydroxy-3 , 3 , 4 , 5-tertramethoxylignan-9 ,由各种各样的分光镜的分析的 9-olide 。5-Methoxytracheloside 是新混合物, 5-methoxytrachelogenin 第一次从生来的来源被孤立。 | Ling Jing Neng Jiang Yu Yu Shan Li Le Fu Yi Min Zhao | 2011 | Chinese Chemical Letters2011，22，9： | 5 |
| 13 | A flexible metallic TiC nanofiber/vertical graphene 1D/2D heterostructured as active electrocatalyst for advanced Li–S batteries显示文摘The realistic application of lithium-sulfur(Li-S)batteries has been severely hindered by the sluggish conversion kinetics of polysulfides(LiPS)and inhomogeneous deposition of Li_(2)S at high sulfur loading and low electrolyte/sulfur ratio(E/S).Herein,a flexible Li-S battery architecture based on electrocatalyzed cathodes made of interfacial engineered TiC nanofibers and in situ grown vertical graphene are developed.Integrated 1D/2D heterostructured electrocatalysts are realized to enable highly improved Li^(+)and electron transportation together with significantly enhanced affinity to LiPS,which effectively accelerate the conversion kinetics between sulfur species,and thus induce homogeneous deposition of Li_(2)S in the catalyzed cathodes.Consequently,highly active electro-electrocatalystsbased cells exhibit remarkable rate capability at 2C with a high specific capacity of 971 mAh g^(-1).Even at ultra-high sulfur loading and low E/S ratio,the battery still delivers a high areal capacity of 9.1 mAh cm^(-2),with a flexible pouch cell being demonstrated to power a LED array at different bending angles with a high capacity over 100 cycles.This work puts forward a novel pathway for the rational design of effective nanofiber electrocatalysts for cathodes of high-performance Li-S batteries. | Yongshang Zhang Peng Zhang Shijie Zhang Zheng Wang Neng Li SRavi PSilva Guosheng Shao | 2021 | InfoMat2021，3，7： | 5 |
| 14 | Changes in Antioxidant Enzyme Activities and Malondialdehyde(MDA) Content of Rice with Blast Resistance Induced by Ag-antibiotic 702显示文摘The paper was to explore the effect of rice blast resistance induced by Ag-antibiotic 702 on antioxidant enzyme activities and malondialdehyde( MDA)content. At three-leaf and one-heart stage of Luliangyou 996,15 μg/mL Ag-antibiotic 702 was sprayed,while Validamycin and distilled water were sprayed as positive control and negative control,respectively. The antioxidant enzyme( SOD,POD,PPO,CAT and PAL) activities and malondialdehyde( MDA) content in rice leaves were determined every 24 h within 168 h post spraying. Compared with CK,the MDA content and activities of the five antioxidant enzymes increased in Agantibiotic 702 treatment,Validamycin treatment and M. grisea inoculation treatment. The MDA content and SOD,CAT and POD activities in Ag-antibiotic 702 treatment were significantly higher than those in M. grisea inoculation treatment in early stage,and the APX and LOX activities increased more remarkably and rapidly. The induction effect of Ag-antibiotic 702 could reach or exceed that of Validamycin treatment. Ag-antibiotic 702 enhanced the resistance to rice blast because MDA content and antioxidant enzymes activities were improved in rice leaves. Therefore,the increase of rice blast resistance induced by Ag-antibiotic 702 in rice was positively correlated with the increase of MDA content and antioxidant enzymes activities in rice leaves. | Hu Neng Tu Xiaorong Li Kuntai Liu Yongkang Guo Amin Tu Guoquan Huang Lin | 2017 | Plant Diseases and Pests2017，8，2： | 5 |
| 15 | Laser Additive Manufacturing on Metal Matrix Composites: A Review显示文摘Important progresses in the study of laser additive manufacturing on metal matrix composites(MMCs)have been made.Recent efforts and advances in additive manufacturing on 5 types of MMCs are presented and reviewed.The main focus is on the material design,the combination of reinforcement and the metal matrix,the synthesis principle during the manufacturing process,and the resulted microstructures as well as properties.Thereafter,the trend of development in future is forecasted,including:Formation mechanism and reinforcement principle of strengthening phase;Material and process design to actively achieve expected performance;Innovative structure design based on the special properties of laser AM MMCs;Simulation,monitoring and optimization in the process of laser AM MMCs. | Neng Li Wei Liu Yan Wang Zijun Zhao Taiqi Yan Guohui Zhang Huaping Xiong | 2021 | Chinese Journal of Mechanical Engineering2021，34，3： | 4 |
| 16 | Decontamination of Bacillus subtilis var. niger spores on selected surfaces by chlorine dioxide gas显示文摘Objective:Chlorine dioxide(CD) gas has been used as a fumigant in the disinfection of biosafety labo-ratories.In this study,some experiments were conducted to assess the inactivation of spores inoculated on six ma-terials [stainless steel(SS),painted steel(PS),polyvinyl chlorid(PVC),polyurethane(PU),glass(GS),and cotton cloth(CC)] by CD gas.The main aims of the study were to determine the sporicidal efficacy of CD gas and the effect of prehumidification before decontamination on sporicidal efficacy.Methods:Material coupons(1.2 cm diameter of SS,PS,and PU;1.0 cm×1.0 cm for PVC,GS,and CC) were contaminated with 10 μl of Bacillus subtilis var.niger(ATCC 9372) spore suspension in mixed organic burden and then dried in a biosafety cabinet for 12 h.The spores were recovered by soaking the coupons in 5 ml of extraction liquid for 1 h and then vortexing the liquid for 1 min.Results:The log reductions in spore numbers on inoculated test materials exposed to CD gas [0.080%(volume ratio,v/v) for 3 h] were in the range of from 1.80 to 6.64.Statistically significant differences were found in decontamination efficacies on test material coupons of SS,PS,PU,and CC between with and without a 1-h prehumidification treatment.With the extraction method,there were no statistically significant differences in the recovery ratios between the porous and non-porous materials.Conclusions:The results reported from this study could provide information for developing decontamination technology based on CD gas for targeting surface microbial contamination. | Yan-ju LI Neng ZHU Hai-quan JIA Jin-hui WU Ying YI Jian-cheng QI | 2012 | Journal of Zhejiang University-Science B(Biomedicine & Biotechnology)2012，13，4： | 4 |
| 17 | Research Progress of Refractory High Entropy Alloys:A Review显示文摘Owing to superior comprehensive performance than conventional superalloys at high temperature,refractory high entropy alloy(RHEA)is becoming a promising candidate for the next generation high-temperature material.Herein,contemporary aspects of corresponding development of RHEAs are reviewed to discuss various factors affecting the organization structure and service performance.It mainly covers alloying system and strengthening mechanism,the preparation method,plastic deformation and the related mechanism,as well as microstructure control by heat treatment.Firstly,the alloy systems and strengthening mechanism are introduced.This is followed by different preparation methods and the comparison of strengths and shortcomings based on different RHEAs.Then,hot deformation behavior and plastic deformation under different loadings are analyzed.Based on this,the influence of heat treatment on microstructures prior to and after the deformation is further summarized.Finally,some important research areas to be carried out in future are pointed out.This review will give a deep understanding of the effects of different factors on the service performance and provide scientific guide in designing RHEAs with improved performance. | Xiaochang Xie Neng Li Wei Liu Shuai Huang Xiaoyong He Qiuying Yu Huaping Xiong Enhui Wang Xinmei Hou | 2022 | Chinese Journal of Mechanical Engineering2022，35，6： | 4 |
| 18 | Effect of Nanocomposites Coatings on Exterior Performance of Bamboo during Aging显示文摘Bamboo deterioration caused by light becomes a significant problem as application of bamboo extends from indoor to outdoor.The color and roughness of bamboo are two important exterior performances.This study focused on UV resistant nano composites coatings for exterior use and what aimed to find a formulation which could enhance the durability of bamboo.Four kinds of film-forming materials and four kinds of nano particles were used to improve bamboo exterior performance.The color and roughness of nano composites coatings were measured during accelerated weathering.Artificial aging time was 174 h at the temperature of 50 ℃.The experiment showed nanocomposites coatings had significant improvement in UV-shielding and nearly all the samples presented a darkening tendency in ΔL* and increasing tendency in Δa*,ΔE* and ΔRa.The orthogonal experiment obtained the least change in color and Ra which could be achieved with nano composites coating made by melamine resin and TiO2 when a* was considered as an important index.Film-forming material was the only factor which had significant influence on color and roughness when a* was not considered as important index,then melamine resin was the best choice. | LI Neng CHEN Yuhe BAO Yongjie ZOU Yijia CAI Hanjiang | 2012 | Chinese Forestry Science and Technology2012，11，Z1： | 4 |
| 19 | Improving stability of MXenes显示文摘Due to their superior hydrophilicity and conductivity,ultra-high volumetric capacitance,and rich surface-chemistry properties,MXenes exhibit unique and excellent performance in catalysis,energy storage,electromagnetic shielding,and life sciences.Since they are derived from ceramics(MAX phase)through etching,one of the challenges in MXenes preparation is the inevitable exposure of metal atoms on their surface and embedding of anions and cations.Because the as-obtained MXenes are always in a thermodynamically metastable state,they tend to react with trace oxygen or oxygen-containing groups to form metal oxides or degrade,leading to sharply declined activity and impaired performance.Therefore,improving the stability of MXenesbased materials is of practical significance in relevant applications.Unfortunately,there lacks a comprehensive review in the literature on relevant topics.To help promote the wide applications of MXenes,we review from the following aspects:(i)insights into the factors affecting the stability of MXenes-based materials,including oxidation of MXenes flakes,stability of MXenes colloidal solutions,and swelling and degradation of MXenes thin-film,(ii)strategies for enhancing the stability of MXenes-based materials by optimizing MAX phase synthesis and modifying the MXenes preparation,and(iii)techniques for further increasing the stability of freshly prepared MXenes-based materials via controlling the storage conditions,and forming shielding on the surface and/or edge of MXenes flakes.Finally,some outlooks are proposed on the future developments and challenges of highly active and stable MXenes.We aim to provide guidance for the design,preparation,and applications of MXenes-based materials with excellent stability and activity. | Jizhou Jiang Saishuai Bai Jing Zou Song Liu Jyh-Ping Hsu Neng Li Guoyin Zhu Zechao Zhuang Qi Kang Yizhou Zhang | 2022 | Nano Research2022，15，7： | 4 |
| 20 | Spatial correlation of elastic heterogeneity tunes the deformation behavior of metallic glasses显示文摘Metallic glasses(MGs)possess remarkably high strength but often display only minimal tensile ductility due to the formation of catastrophic shear bands.Purposely enhancing the inherent heterogeneity to promote distributed flow offers new possibilities in improving the ductility of monolithic MGs.Here,we report the effect of the spatial heterogeneity of elasticity,resulting from the inherently inhomogeneous amorphous structures,on the deformation behavior of MGs,specifically focusing on the ductility using multiscale modeling methods.A highly heterogeneous,Gaussian-type shear modulus distribution at the nanoscale is revealed by atomistic simulations in Cu_(64)Zr_(36) MGs,in which the soft population of the distribution exhibits a marked propensity to undergo the inelastic shear transformation.By employing a mesoscale shear transformation zone dynamics model,we find that the organization of such nanometer-scale shear transformation events into shear-band patterns is dependent on the spatial heterogeneity of the local shear moduli.A critical spatial correlation length of elastic heterogeneity is identified for the simulated MGs to achieve the best tensile ductility,which is associated with a transition of shear-band formation mechanisms,from stress-dictated nucleation and growth to structure-dictated strain percolation,as well as a saturation of elastically soft sites participating in the plastic flow.This discovery is important for the fundamental understanding of the role of spatial heterogeneity in influencing the deformation behavior of MGs.We believe that this can facilitate the design and development of new ductile monolithic MGs by a process of tuning the inherent heterogeneity to achieve enhanced ductility in these high-strength metallic alloys. | Neng Wang Jun Ding Feng Yan Mark Asta Robert O.Ritchie Lin Li | 2018 | npj Computational Materials2018，，1： | 4 |
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