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| 1 | Atomically dispersed Au_1 catalyst towards efficient electrochemical synthesis of ammonia显示文摘Tremendous efforts have been devoted to explore energy-efficient strategies of ammonia synthesis to replace Haber–Bosch process which accounts for 1.4% of the annual energy consumption. In this study,atomically dispersed Au_1 catalyst is synthesized and applied in electrochemical synthesis of ammonia under ambient conditions. A high NH_4^+ Faradaic efficiency of 11.1% achieved by our Au_1 catalyst surpasses most of reported catalysts under comparable conditions. Benefiting from efficient atom utilization, an NH_4^+ yield rate of 1,305 lg h^(-1) mg_(Au)^(-1) has been reached, which is roughly 22.5 times as high as that by supported Au nanoparticles. We also demonstrate that by employing our Au_1 catalyst, NH4+can be electrochemically produced directly from N_2 and H_2 with an energy utilization rate of 4.02 mmol kJ^(-1). Our study provides a possibility of replacing the Haber–Bosch process with environmentally benign and energy-efficient electrochemical strategies. | Xiaoqian Wang Wenyu Wang Man Qiao Geng Wu Wenxing Chen Tongwei Yuan Qian Xu Min Chen Yan Zhang Xin Wang Jing Wang Jingjie Ge Xun Hong Yafei Li Yuen Wu Yadong Li | 2018 | Science Bulletin2018，63，19： | 22 |
| 2 | Ultrasmall Ag^+-rich nanoclusters as highly efficient nanoreservoirs for bacterial killing显示文摘自从古代史,金属性的银(Ag ) 和它与感染作斗争的能力被知道了。在纳米技术前进的 wake,与宽广光谱作斗争的银功效细菌的感染进一步在 Ag nanoparticles (NP ) 形式被改进。当 Ag NP 的尺寸减少到 sub-2 nm 范围时,最近的研究从 NP 归功于 Ag NP 的宽广光谱抗菌剂性质到 Ag+ 离子的分离,它不能是完全适用的[表示 Ag nanoclusters (NC )] 。在我们报导的这份报纸,那 ultrasmall 谷胱甘肽(GSH ) 保护了 Ag+ 富有的 NC (Ag+-R NC 作为缩写,与在 NC 的 Ag+ 种类的优势) 比参考书 NC 向克否定、克积极的细菌举办高得多的抗菌剂活动, GSH-Ag0-R NC。他们有一样的尺寸和表面 ligand,但是与核心银的不同氧化状态。这有趣的发现建议在表面上用丰富的 Ag+ 离子武装的未离解的 Ag+-R NC 在细菌的杀死是高度活跃的,它没在他们的更大的对应物的系统被观察, Ag NP。 | Xun Yuan Magdiel I. Setyawati David T. Leong Jianping Xie | 2014 | Nano Research2014，7，3： | 12 |
| 3 | NiaSi2O5(OH)4 Multi-Walled Nanotubes with Tunable Magnetic Properties and Their Application as Anode Materials for Lithium Batteries显示文摘 | Yan Yang Qingqin Liang dinghong Li Yuan Zhuang Yunhua He Bo Bai Xun Wang | 2011 | Nano Research2011，4，9： | 12 |
| 4 | Correlation of Platelet and Coagulation Function with Blood Stasis Syndrome in Coronary Heart Disease: A Systematic Review and Meta-Analysis显示文摘Objective To investigate the correlation of platelet and coagulation function with blood stasis syndrome(BSS)in coronary heart disease(CHD).Methods The protocol for this meta-analysis was registered on PROSPERO(CRD42019129452).PubMed,Excerpta Medica Database(Embase),the Cochrane Library,and China National Knowledge Infrastructure(CNKI)were searched from inception to 1st June,2020.Trials were considered eligible if they enrolled BSS and non-BSS(NBSS)patients with CHD and provided information on platelet and coagulation function.The platelet function,coagulation function,and fibrinolytic activity were compared between the BSS and NBSS groups.Forest plots were generated to show the SMDs or ESs with corresponding 95%CIs for each study.Subgroup analysis and sensitivity analysis were performed to explore potential sources of heterogeneity.Results The systematic search identified 1,583 articles.Thirty trials involving 10,323 patients were included in the meta-analysis.The results showed that mean platelet volume,platelet distribution width,platelet aggregation rate,platelet P selectin,fibrinogen,plasminogen activator inhibitor-1(PAI-1),thromboxane B2(TXB2),6-keto-prostaglandin F1alpha(6-keto-PGF1α),and TXB2/6-keto-PGF1αwere higher in the BSS group than in the NBSS group(P<0.05 or P<0.01).Activated partial thromboplastin time was lower in the BSS group than in the NBSS group in the acute phase of CHD(P<0.01).The R and K values in thromboelastography and tissue plasminogen activator(t-PA)and t-PA/PAI-1 were lower in the BSS group than in the NBSS group(all P<0.01).No difference was found in the results of platelet count,plateletcrit,maximum amplitude,von Willebrand factor,prothrombin time,thrombin time,international normalized ratio,etc.between groups.Conclusions Increased platelet function,hypercoagulability,and decreased fibrinolytic activity were found among CHD patients with BSS. | XIN Qi-qi CHEN Xun YUAN Rong YUAN Ya-hui HUI Jia-qi MIAO Yu CONG Wei-hong CHEN Ke-ji | 2021 | Chinese Journal of Integrative Medicine2021，27，11： | 7 |
| 5 | Association of Dietary Carotenoids Intake with Skeletal Fluorosis in the Coal-burning Fluorosis Area of Guizhou Province显示文摘Objective To explore whether the intake of dietary carotenoids could protect against skeletal fluorosis in Guizhou province in which coal-burning fluorosis is endemic. Methods A case-control study of 196 patients with skeletal fluorosis and 196 age and gender-matched controls was conducted in Zhijin, Guizhou Province. Face-to-face interviews were conducted to assess habitual dietary intake using a 75-item food frequency questionnaire and various covariates with structured questionnaires. Urinary fluoride was measured using an ion-selective electrode method. The genotype of superoxide dismutase 2(SOD2) rs11968525 was detected by Taq Man method. Results We observed significant dose-dependent inverse associations of skeletal fluorosis with intake of β-carotene, lutein/zeaxanthin, lycopene, and total carotenoids(P-trend = 0.002 to 0.018), whereas α-carotene and β-cryptoxanthin intakes were not found to be related to skeletal fluorosis, after adjustment for potential confounders. The adjusted ORs and 95% CI of skeletal fluorosis for the highest versus lowest quartile were 0.30(0.10, 0.86) for β-carotene, 0.23(0.08, 0.66) for lycopene, 0.26(0.10, 0.75) for lutein/zeaxanthin and 0.34(0.14, 0.74) for total carotenoids(all P-trend < 0.05). Stratified analyses showed that the protective effects of lutein/zeaxanthin and total carotenoids on skeletal fluorosis were more evident for individuals with the AG+AA genotypes of SOD2(rs11968525). Conclusion Increased intakes of β-carotene, lutein/zeaxanthin, lycopene, and total carotenoids are independently associated with a lower risk of coal-burning skeletal fluorosis. SOD2(rs11968525) polymorphisms might modify the inverse associations between dietary carotenoids and skeletal fluorosis. | LIU Jun YANG Sheng LUO Ming Jiang ZHAO Xun ZHANG Yuan Mei LUO Ya | 2018 | Biomedical and Environmental Sciences2018，31，6： | 7 |
| 6 | Catalytic oxidation of low concentration formaldehyde over Pt/TiO_(2) catalyst显示文摘Formaldehyde(HCHO) is an important indoor pollutant.Catalytic oxidize low concentration HCHO is an effective way to eliminate indoor pollution.In this study,a series of Pt/TiO_(2) catalysts are prepared by impregnation and reduced by NaBH_4.The effects of loading amount of Pt and cry stal type of TiO_(2) on the physical and chemical properties and the catalytic performance in HCHO oxidation reaction are investigated.The results show that the quantity of active site and the oxygen vacancy of catalysts increa sed with increasing Pt content,which is beneficial to promote the further performance of catalysts.Nevertheless,with the further rises of Pt content,the specific surface area further decreases,and the proportion of Pt^(2+) species on the catalyst surface which is significant to catalytic properties also decreases,causing catalytic performance decreases.Compared with the catalyst supporting on rutile,the Pt/α-TiO_(2) catalyst supporting on anatase has larger specific surface area,more Pt^(2+) phase and easier to form oxygen vacancy in the support,which cause better catalytic performance.The catalyst with Pt content of0.1 wt% and supported by anatase TiO_(2) has the best catalytic performance.The HCHO conversion efficiency reaches 98% and 100% at 50℃ and 100 ℃, and the stabilization time is longer than 140 h. | Yuan Su Keming Ji Jiayao Xun Kan Zhang Ping Liu Liang Zhao | 2021 | Chinese Journal of Chemical Engineering2021，34，1： | 6 |
| 7 | Dark matter direct search sensitivity of the PandaX-4T experiment显示文摘The Panda X-4T experiment, a 4-ton scale dark matter direct detection experiment, is being planned at the China Jinping Underground Laboratory. In this paper we present a simulation study of the expected background in this experiment. In a 2.8-ton fiducial mass and the signal region between 1-10 keV electron equivalent energy, the total electron recoil background is found to be 4.9 × 10^(-5) kg^(-1) d^(-1) keV^(-1). The nuclear recoil background in the same region is 2.8 × 10^(-7) kg^(-1) d^(-1) keV^(-1). With an exposure of 5.6 ton-years, the sensitivity of Panda X-4 T could reach a minimum spin-independent dark matter-nucleon cross section of 6 × 10^(-48) cm^2 at a dark matter mass of 40 Ge V/c^2. | HongGuang Zhang Abdusalam Abdukerim Wei Chen Xun Chen YunHua Chen XiangYi Cui BinBin Dong DeQing Fang ChangBo Fu Karl Giboni Franco Giuliani LinHui Gu XuYuan Guo ZhiFan Guo Ke Han ChangDa He ShengMing He Di Huang XingTao Huang Zhou Huang Peng Ji XiangDong Ji YongLin Ju ShaoLi Li Yao Li Heng Lin HuaXuan Liu JiangLai Liu YuGang Ma YaJun Mao KaiXiang Ni JinHua Ning XiangXiang Ren Fang Shi AnDi Tan AnQing Wang Cheng Wang HongWei Wang Meng Wang QiuHong Wang SiGuang Wang XiuLi Wang XuMing Wang Zhou Wang MengMeng Wu ShiYong Wu JingKai Xia MengJiao Xiao PengWei Xie BinBin Yan JiJun Yang Yong Yang ChunXu Yu JuMin Yuan JianFeng Yue Dan Zhang Tao Zhang Li Zhao QiBin Zheng JiFang Zhou Ning Zhou XiaoPeng Zhou | 2019 | Science China(Physics,Mechanics & Astronomy)2019，62，3： | 6 |
| 8 | Biological applications of copper-containing materials显示文摘Copper is an indispensable trace metal element in the human body,which is mainly absorbed in the stomach and small intestine and excreted into the bile.Copper is an important component and catalytic agent of many enzymes and proteins in the body,so it can influence human health through multiple mechanisms.Based on the biological functions and benefits of copper,an increasing number of researchers in the field of biomaterials have focused on developing novel copper-containing biomaterials,which exhibit unique properties in protecting the cardiovascular system,promoting bone fracture healing,and exerting antibacterial effects.Copper can also be used in promoting incisional wounds healing,killing cancer cells,Positron Emission Tomography(PET)imaging,radioimmunological tracing and radiotherapy of cancer.In the present review,the biological functions of copper in the human body are presented,along with an overview of recent progress in our understanding of the biological applications and development of copper-containing materials.Furthermore,this review also provides the prospective on the challenges of those novel biomaterials for future clinical applications. | Peng Wang Yonghui Yuan Ke Xu Hongshan Zhong Yinghui Yang Shiyu Jin Ke Yang Xun Qi | 2021 | Bioactive Materials2021，6，4： | 5 |
| 9 | Fine Tuning of the Dimensionality of Zinc Silicate Nanostructures and Their Application as Highly Efficient Absorbents for Toxic Metal Ions显示文摘The controllable synthesis of materials with the desired crystal structure and dimensionality is of great significance in material science.In this work we report the successful synthesis of amorphous and crystalline zinc silicates with different dimensionalities and well-defined shapes,including hollow spheres,nanowires and membranes.The structure-related absorption properties have been studied.A detailed study of their ability to remove Pb(Ⅱ),Cd(Ⅱ),Cr(Ⅲ),and Fe(Ⅲ)ions has been performed.The amorphous zero-dimensional(0-D)hollow spheres show the best removal ability for all the metal ions investigated.In particular,their absorption capacity for Pb(Ⅱ)ions is 129 mg/g,which is double the value reported for magnesium silicate hollow spheres.However,the removal abilities of crystalline one-dimensional(1-D)nanowires and two-dimensional(2-D)membranes are found to be dependent on the charge of the target metal ion.In general,nanowires show better removal capacity for trivalent ions,especially Fe(Ⅲ),while 2-D membranes exhibit better removal capacity for divalent ions. | Yan Yang Yuan Zhuang Yunhua He Bo Bai Xun Wang | 2010 | Nano Research2010，3，8： | 4 |
| 10 | Isolation and phylogenetic study of Rift Valley fever virus from the first imported case to China显示文摘Dear Editor,Rift Valley fever(RVF)is an anthropozoonosis caused by Rift Valley fever virus(RVFV).RVFV belongs to the Phlebovirus genus in the family Bunyaviridae,which is circulating among ruminants.Human infection with RVFV is generally asymptomatic,however,minority of patients develop severe RVF diseases like encephalitis | Yongxia Shi Kui Zheng Xiaobo Li Liqiang Li Shufen Li Jinmin Ma Jun Dai Jingkai Ji Shuai Yuan Haorong Lu Jiandong Li Fangfang Sun Xun Xu Jicheng Huang | 2017 | Virologica Sinica2017，32，3： | 4 |
| 11 | Exposing Cu-rich {110} active facets in PtCu nanostars for boosting electrochemical performance toward multiple liquid fuels electrooxidation显示文摘In catalysis,tuning the structural composition of the metal alloy is known as an efficient way to optimize the catalytic activity.This work presents the synthesis of compositional segregated six-armed PtCu nanostars via a facile solvothermal method and their distinct composition-structure-dependent performances in electrooxidation processes.The alloy is shown to have a unique six arms with a Cu-rich dodecahedral core,mainly composed of {110} facets and exhibit superior catalytic activity toward alcohols electrooxidation compared to the hollow counterpart where Cu was selectively etched.Density functional theory (DFT) calculations suggest that the formation of hydroxyl intermediate (OH^*) is crucial to detoxify CO poisoning during the electrooxidation processes.The addition of Cu is found to effectively adjust the d band location of the alloy catalyst and thus enhance the formation of ^*OH intermediate from water splitting,which decreases the coverage of ^*CO intermediate.Our work demonstrates that the unique compositional anisotropy in alloy catalyst may boost their applications in electrocatalysis and provides a methodology for the design of this type catalyst. | Liping Huang Wei Zhang Peng Li Yongbo Song Hongting Sheng Yuanxin Du Yang-Gang Wang Yuen Wu Xun Hong Yanhuai Ding Xiaoyou Yuan Manzhou Zhu | 2019 | Nano Research2019，12，5： | 4 |
| 12 | Configurational information entropy analysis of fragment mass cross distributions to determine the neutron skin thickness of projectile nuclei显示文摘Configurational information entropy(CIE)analysis has been shown to be applicable for determining the neutron skin thickness(δnp)of neutron-rich nuclei from fragment production in projectile fragmentation reactions.The BNN+FRACS machine learning model was adopted to predict the fragment mass cross-sections(σ_(A))of the projectile fragmentation reactions induced by calcium isotopes from ^(36)Ca to ^(56)Ca on a ^(9)Be target at 140MeV/u.The fast Fourier transform was adopted to decompose the possible information compositions inσA distributions and determine the quantity of CIE(S_(A)[f]).It was found that the range of fragments significantly influences the quantity of S_(A)[f],which results in different trends of S_(A)[f]~δnp correlation.The linear S_(A)[f]~δnp correlation in a previous study[Nucl.Sci.Tech.33,6(2022)]could be reproduced using fragments with relatively large mass fragments,which verifies that S_(A)[f]determined from fragmentσAis sensitive to the neutron skin thickness of neutron-rich isotopes. | Hui-Ling Wei Xun Zhu Chen Yuan | 2022 | Nuclear Science and Techniques2022，33，9： | 4 |
| 13 | Sub-2.0-nm Ru and composition-tunable RuPt nanowire networks显示文摘最近,因为他们的唯一的结构和性质, ultrathin nanostructures 的合成吸引了增加的兴趣。在这个工作,我们用一个环境地友好的水的方法报导 sub-2.0-nm Ru 和作文悦耳的 RuPt nanowire 网络的合成。结构用传播电子显微镜学(TEM ) 被描绘,高分辨率的 TEM, X 光检查衍射(XRD ) ,和精力散的 X 光检查(EDX ) 光谱学。而且,钠 n-dodecyl 硫酸盐的联合利用和钾氟化物决心在这些 ultrathin nanostructures 的形成起一个关键作用。sub-2.0-nm RuPt nanowire 网络的 electrocatalytic 性质在酸的媒介为甲醇氧化被调查。nanostructures 显示了作文依赖者性质,并且与商业 Ru 50 磅 50/C, 同样综合的 Ru 56 磅 44 ultrathin nanowire 网络展出提高的稳定性。 | Weiyue Zhao Dabing Huang Qiang Yuan Xun Wang | 2016 | Nano Research2016，9，10： | 4 |
| 14 | 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone Induces Circulating MicroRNA Deregulation in Early Lung Carcinogenesis显示文摘Objective To study the alteration of circulating microRNAs in 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone(NNK)-induced early stage lung carcinogenesis. Methods A lung cancer model of male F344 rats was induced with systemic NNK and levels of 8 lung cancer-associated miRNAs in whole blood and serum of rats were measured by quantitative RT-PCR of each at weeks 1,5,10,and 20 following NNK treatment. Results No lung cancer was detected in control group and NNK treatment group at week 20 following NNK treatment. The levels of some circulating miRNAs were significantly higher in NNK treatment group than in control group. The miR-210 was down-regulated and the miR-206 was up-regulated in NNK treatment group. The expression level of circulating miRNAs changed from week 1 to week 20 following NNK treatment. Conclusion The expression level of circulating miRNAs is related to NNK-induced early stage lung carcinogenesis in rats and can therefore serve as its potential indicator. | WU Jian Jun YANG Ti LI Xun XIA Yuan ZHAO Yao ZOU Fei JIANG Yi Guo | 2014 | Biomedical and Environmental Sciences2014，27，1： | 3 |
| 15 | Novel MAC protocol for terahertz ultra-high data-rate wireless networks显示文摘Due to having a large bandwidth to support Gbps-level data rate,terahertz communication attracts more and more attention in recent years.However,there are few medium access control(MAC)protocols for terahertz ultra-high data-rate wireless networks,which affects the research and application of terahertz communications.To address this problem and to achieve ultra-high data-rate wireless access with terahertz communication,a novel MAC protocol,called medium access control for terahertz communication(MAC-TC),is proposed.Through designing a new channel access scheme,a new superframe structure,and related key parameters,MAC-TC can support a maximum data rate up to 10 Gbit/s even higher.Theoretical analysis and simulation results show that our proposed MAC protocol realizes the function of medium access control and attains a maximum data rate of 18.3 Gbit/s,which is 2 times higher than 5.78 Gbit/s,the theoretical maximum data rate of IEEE 802.15.3c standard. | REN Zhi CAO Ya-nan ZHOU Xun ZHENG Yuan Chen Qian-bin | 2013 | The Journal of China Universities of Posts and Telecommunications2013，20，6： | 3 |
| 16 | Dynamic cell transition and immune response landscapes of axolotl limb regeneration revealed by single-cell analysis显示文摘Dear Editor,The axolotl,Ambystoma mexicanum,has extraordinary capability to fully recover multiple tissues after lost,whereas such capability has disappeared in mammals.Thus,deci-phering detailed mechanisms underlying axolotl regenera-tion could provide valuable lessons for regenerative medicine.However,many questions,such as the origin of essential progenitor cells and key responses of individual types of cells for regeneration remain elusive(Haas and Whited,2017).Newly developed single-cell RNA sequenc-ing(scRNA-seq)method enables researchers to observe cellular and molecular dynamics in axolotl regeneration at the single-cell resolution(Gerber et al.,2018;Leigh et al.,2018),but the reported transcriptome landscapes are only for certain cell types or in certain regenerative stages.A complete overview of the regeneration process for all cell types is still lacking. | Hanbo Li Xiaoyu Wei Li Zhou Weiqi Zhang Chen Wang Yang Guo Denghui Li Jjianyang Chen Tianbin Liu Yingying Zhang Shuai Ma Congyan Wang Fujian Tan Jiangshan Xu Yang Liu Yue Yuan Liang Chen Qiaoran Wang Jing Qu Yue Shen Shanshan Liu Guangyi Fan Longqi Liu Xin Liu Yong Hou Guang-Hui Liu Ying Gu Xun Xu | 2021 | Protein & Cell2021，12，1： | 3 |
| 17 | Characterization and validation of somatic mutation spectrum to reveal heterogeneity in gastric cancer by single cell sequencing显示文摘Gastric cancer(GC) is a highly heterogeneous disease with multiple cellular types and poor prognosis.However, the cellular evolution and molecular basis of GC at the individual intra-tumor level has not been well demonstrated. We performed single-cell whole exome sequencing to detect somatic singlenucleotide variants(SNVs) and significantly mutated genes(SMGs) among 34 tumor cells and 9 normal cells from a patient with GC. The Complete Prediction for Protein Conformation(CPPC) approach directly predicting the folding conformation of the protein 3D structure with Protein Folding Shape Code, combined with functional experiments were used to confirm the characterization of mutated SMGs in GC cells. We identified 201 somatic SNVs, including 117 non-synonymous mutations in GC cells. Further analysis identified 24 significant mutated genes(SMGs) in single cells, for which a single amino acid change might affect protein conformation. Among them, two genes(CDC27 and FLG) that were mutated only in single cells but not in the corresponding tumor tissue, were recurrently present in another GC tissue cohort, and may play a potential role to promote carcinogenesis, as confirmed by functional characterization. Our findings showed a mutational landscape of GC at intra-tumor level for the first time and provided opportunities for understanding the heterogeneity and individualized target therapy for this disease. | Lihua Peng Rui Xing Dongbing Liu Li Bao Wenxiang Cheng Hongyi Wang Yuan Yu Xiaofeng Liu Lu Jiang Yan Wu Zhongxue An Qiaoyi Liang Ryong Nam Kim Young Kee Shin Huanming Yang Jian Wang Jun Yu Xiuqing Zhang Xun Xu Jiaan Yang Kui Wu Shida Zhu Youyong Lu | 2019 | Science Bulletin2019，64，4： | 3 |
| 18 | Enhancing stability through ligand-shell engineering: A case study with Au25(SR)18 nanoclusters显示文摘当保护 thiolate 的 Au nanoclusters (NC ) 在各种各样的领域里拉了可观的兴趣时,他们在水的答案的差的稳定性为实际应用仍然是一个主要障碍。这里,我们基于设计在答案改进 thiolated Au NC 的稳定性的 ligand 壳报导唯一的策略。由采用二 终止thiol 的 ligands 相对地在 NC 的表面上为功能的组充电了,我们证明在附近的 ligands 的相对地为充电的功能的组之间的静电的吸引力能在表面 ligands 之中放大协作,在能在水的答案把更高的保护提供给 Au 核心的 NC 表面上导致 pseudo-cage-like 结构的形成。在这研究开发的策略能被扩大到另外的金属 NC,进一步向实际应用程序铺平道路。 | Xun Yuan Nirmal Goswami Ivan Mathews Yong Yu Jianping Xie | 2015 | Nano Research2015，8，11： | 3 |
| 19 | Using PyC modified 3D carbon fiber to reinforce UHTC under low temperature sintering without pressure显示文摘Finding the optimum balance between strength and toughness,as well as acquiring reliable thermal shock resistance and oxidation resistance,has always been the most concerned topic in the discussion of ultra-high temperature ceramic composites.Herein,PyC modified 3D carbon fiber is used to reinforce ultra-high temperature ceramic(UHTC).The macroscopic block composite with large size is successfully fabricated through low temperature sintering at 1300℃without pressure.The prepared PyC modified 3D C_(f)/ZrC-SiC composites simultaneously possess excellent physical and chemical stability under the synergistic effect of PyC interface layer and low temperature 1/2 sintering without pressure.The fracture toughness is increased in magnitude to 13.05±1.72 MPa·m^(1/2)accompanied by reliable flexural strength of 251±27 MPa.After rapid thermal shock spanning from room temperature(RT)to 1200℃,there are no visible surface penetrating cracks,spalling,or structural fragmentation.The maximum critical temperature difference reaches 875℃,which is nearly three times higher than that of traditional monolithic ceramics.The haunting puzzle of intrinsic brittleness and low damage tolerance are resolved fundamentally.Under the protection of PyC interface layer,the carbon fibers around oxide layer and matrix remain structure intact after static oxidation at 1500℃for 30 min.The oxide layer has reliable physical and chemical stability and resists the erosion from fierce oxidizing atmosphere,ensuring the excellent oxidation resistance of the composites.In a sense,the present work provides promising universality in designability and achievement of 3D carbon fiber reinforced ceramic composites. | Baihe DU Yuan CHENG Liancai XUN Shuchang ZHANG Jing TONG Qingrong LV Shanbao ZHOU Ping HU Xinghong ZHANG | 2021 | Journal of Advanced Ceramics2021，10，4： | 3 |
| 20 | Crystalline Structure-Dependent Mechanical and Thermoelectric Performance in Ag_(2)Se_(1‐x)S_(x)System显示文摘Self-powered wearable electronics require thermoelectric materials simultaneously with a high dimensionless figure of merit(zT)and good flexibility to convert the heat discharged by the human body into electricity.Ag_(2)(S,Se)-based semiconducting materials can well satisfy these requirements,and thus,they are attracting great attention in thermoelectric society recently.Ag_(2)(S,Se)crystalizes in an orthorhombic structure or monoclinic structure,depending on the detailed S/Se atomic ratio,but the relationship between its crystalline structure and mechanical/thermoelectric performance is still unclear to date.In this study,a series of Ag_(2)Se_(1-x)S_(x)(x=0,0.1,0.2,0.3,0.4,and 0.45)samples were prepared and their mechanical and thermoelectric performance dependence on the crystalline structure was systematically investigated.x=0:3 in the Ag_(2)Se_(1-x)S_(x)system was found to be the transition boundary between orthorhombic and monoclinic structures.Mechanical property measurement shows that the orthorhombic Ag_(2)Se_(1-x)S_(x)samples are brittle while the monoclinic Ag_(2)Se_(1-x)S_(x)samples are ductile and flexible.In addition,the orthorhombic Ag_(2)Se_(1-x)S_(x)samples show better electrical transport performance and higher zT than the monoclinic samples under a comparable carrier concentration,most likely due to their weaker electron-phonon interactions.This study sheds light on the further development of flexible inorganic TE materials. | Jiasheng Liang Pengfei Qiu Yuan Zhu Hui Huang Zhiqiang Gao Zhen Zhang Xun Shi Lidong Chen | 2020 | Research2020，，1： | 2 |
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