|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Comparison of Absolute Gravity Measurements Obtained with FG5/232 and FG5/214 Instruments显示文摘This paper introduces the comparison of absolute gravity measurements in China during 2006-2008,and analyzing the survey and comparing the results,it shows that there is no obvious system error between the gravimeter of FG5/214 and FG5/232,the surveying accuracy is very high and repetition is good,and their inner surveying accuracy is about 2-3 microGal. | XING Lelin LI Hui LI Jiancheng HE Zhitang | 2009 | Geo-Spatial Information Science2009，12，4： | 23 |
| 2 | Direct observation of metastable face-centered cubic Sb2Te3 crystal显示文摘尽管阶段变化记忆技术在过去的二十年急速地发展了,关键切换材料的认知仍然忽视一个重要成员,以脸为中心的立方的 Sb 2 Te 3 。除了著名平衡六角形的 Sb 2 Te 3 水晶,我们证明亚稳的以脸为中心的立方的 Sb 是 2 Te 3 阶段确实存在。如此的亚稳的晶体包含随机占据 cationic 格子地点的空缺的大集中。以脸为中心对 Sb 2 Te 3, 由空缺聚集伴随了,与 Ge 2 Sb 2 Te 5 合金。我们证明像共有原子价的契约在亚稳的 Sb 2 Te 3 水晶,从理想的反响的特征背离。如果一种合适的做技术被采用,亚稳的 Sb 2 Te 3 阶段能为认识到 reversibly 快速、低精力的阶段变化存储器应用程序是有希望的。我们的学习可以在新奇阶段变化材料的设计提供新卓见进商品化的 Ge-Sb-Te 系统和帮助增加阶段变化存储器设备的表演。 | Yonghui Zheng Mengjiao Xia Yan Cheng Feng Rao Keyuan Ding Weili Liu Yu Jia Zhitang Song Songlin Feng | 2016 | Nano Research2016，9，11： | 5 |
| 3 | Ta-Doped Sb2Te Allows Ultrafast Phase-Change Memory with Excellent High-Temperature Operation Characteristics显示文摘Phase-change memory(PCM)has considerable promise for new applications based on von Neumann and emerging neuromorphic computing systems.However,a key challenge in harnessing the advantages of PCM devices is achieving high-speed operation of these devices at elevated temperatures,which is critical for the efficient processing and reliable storage of data at full capacity.Herein,we report a novel PCM device based on Ta-doped antimony telluride(Sb2Te),which exhibits both high-speed characteristics and excellent high-temperature characteristics,with an operation speed of 2 ns,endurance of >106 cycles,and reversible switching at 140℃.The high coordination number of Ta and the strong bonds between Ta and Sb/Te atoms contribute to the robustness of the amorphous structure,which improves the thermal stability.Furthermore,the small grains in the three-dimensional limit lead to an increased energy efficiency and a reduced risk of layer segregation,reducing the power consumption and improving the long-term endurance.Our findings for this new Ta-Sb2Te material system can facilitate the development of PCMs with improved performance and novel applications. | Yuan Xue Shuai Yan Shilong Lv Sannian Song Zhitang Song | 2021 | Nano-Micro Letters2021，13，2： | 4 |
| 4 | Preparation of Non-spherical Colloidal Silica Nanoparticle and Its Application on Chemical Mechanical Polishing of Sapphire显示文摘Non-spherical colloidal silica nanoparticle was prepared by a simple new method, and its particle size distribution and shape morphology were characterized by dynamic light scattering(DLS) and the Focus Ion Beam(FIB) system. This kind of novel colloidal silica particles can be well used in chemical mechanical polishing(CMP) of sapphire wafer surface. And the polishing test proves that non-spherical colloidal silica slurry shows much higher material removal rate(MRR) with higher coefficient of friction(COF) when compared to traditional large spherical colloidal silica slurry with particle size 80 nm by DLS. Besides, sapphire wafer polished by non-spherical abrasive also has a good surface roughness of 0.460 6 nm. Therefore, non-spherical colloidal silica has shown great potential in the CMP field because of its higher MRR and better surface roughness. | 孔慧 WANG Dan 刘卫丽 SONG Zhitang | 2019 | Journal of Wuhan University of Technology(Materials Science)2019，34，1： | 3 |
| 5 | From octahedral structure motif to sub-nanosecond phase transitions in phase change materials for data storage显示文摘Phase change random access memory(PCRAM) has been successfully applied in the computer storage architecture, as storage class memory, to bridge the performance gap between DRAM and Flashbased solid-state drive due to its good scalability, 3 D-integration ability, fast operation speed and compatible with CMOS technology. Focusing on phase change materials and PCRAM for decades, we have successfully developed 128 Mb embedded PCRAM chips, which can meet the requirements of most embedded systems.3 D Xpoint(3 D PCRAM), invented by Intel and Micron, has been regarded as a new breakthrough in the last 25 years since the application of NAND in 1989, which represents state-of-the-art memory technology.This technology has some remarkable features, such as the confined device structure with 20 nm size, the metal crossbar electrodes to reduce the resistance variations in PCRAM arrays, and the ovonic threshold switching selector that can provide a high drive current and a low leakage current. A good understanding of phase change mechanism is of great help to design new phase change materials with fast operation speed,low power consumption and long-lifetime. In this paper, we firstly review the development of PCRAM and different understandings on phase change mechanisms in recent years, and then propose a new view on the mechanism, which is based on the octahedral structure motifs and vacancies. Octahedral structure motifs are generally found in both amorphous and crystalline phase change materials. They are considered to be the basic units during phase transition, which are severely defective in the amorphous phase. These configurations turn into more ordered ones after minor local rearrangements, the growth of which results in the crystallization of rocksalt(RS) phase with a large amount of vacancies in the cation sites. Further driven by thermodynamic driving force, these vacancies move and layer along certain directions; consequently, the metastable RS structure transforms into the stable hexagonal(HEX) structure. Based on our results, we find that reversible phase transition between amorphous phase and RS phase, without further changing into HEX phase, would greatly decrease the required power consumption. Robust octahedra and plenty of vacancies in both amorphous and RS phase, respectively avoiding large atomic rearrangement and providing necessary space, are crucial to achieve the nanosecond or even sub-nanosecond operation of PCRAM. | Zhitang SONG Sannian SONG Min ZHU Liangcai WU Kun REN Wenxiong SONG Songling FENG | 2018 | Science China(Information Sciences)2018，61，8： | 3 |
| 6 | A Phase Change Memory Chip Based on Ti Sb Te Alloy in 40-nm Standard CMOS Technology显示文摘In this letter, a phase change random access memory(PCRAM) chip based on Ti0.4Sb2Te3 alloy material was fabricated in a 40-nm 4-metal level complementary metal-oxide semiconductor(CMOS) technology. The phase change resistor was then integrated after CMOS logic fabrication. The PCRAM was successfully embedded without changing any logic device and process, in which 1.1 V negative-channel metal-oxide semiconductor device was used as the memory cell selector. The currents and the time of SET and RESET operations were found to be 0.2 and 0.5 m A, 100 and 10 ns,respectively. The high speed performance of this chip may highlight the design advantages in many embedded applications. | Zhitang Song Yi Peng Zhan Daolin Cai Bo Liu Yifeng Chen Jiadong Ren | 2015 | Nano-Micro Letters2015，7，2： | 2 |
| 7 | Advances in heterocyclic ketene aminals显示文摘Recent developments in the study of the reactions of heterocyclic ketene aminals are reviewed with the emphases on regioselective alkylation, acylation and glycosylation reactions, and on the aza-ene reactions with α,β-unsaturated compounds, azo and carbonyl compounds. Reactions with 1,3-dipoles and other reagents to synthesize fused heterocycles are also discussed. | WANG Meixiang and HUANG Zhitang(Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, China) | 2002 | Progress in Natural Science:Materials International2002，12，4： | 2 |
| 8 | Undulated 2D Covalent Organic Frameworks Based on Bowl-Shaped Cyclotricatechylene显示文摘Two 2D wavy hexagonal hexahydroxyl cyclotricatechylene (CTC) based COFs, CTC-COF-2 and CTC-COF-3were synthesized through solvothermal reaction. The bowl-shaped conformation caused CTC skeletons packed in acolumnar manner with the same oriented units, thus forming an undulated structure. The gas adsorption propertiesof CTC-COFs were investigated, which show the potential application abilities in hydrogen storage of CTC-COFs.The introduction of pyrene into CTC-COF-3 makes it a potential semiconducting π-conjugated material. | Jingru Zhen Sanyuan Ding Wei Wang Junmin Liu Junliang Sun Zhitang Huang Qiyu Zheng | 2016 | Chinese Journal of Chemistry2016，34，8： | 2 |
| 9 | Analysis of the relationship between bile duct and duodenal microbiota reveals that potential dysbacteriosis is the main cause of primary common bile duct stones显示文摘Bacteria play an important role in the formation of primary Common Bile Duct(CBD)stones.However,the composition and function of the microbiota of bile duct in patients with primary CBD stones remained to be explored.We utilized the 16S rRNA gene high-throughput sequencing technology to analyze the microbial diversity and community composition of biliary and duodenal microbiota in 15 patients with primary CBD stones and 4 patients without biliary tract diseases.Alpha diversity analysis showed that the microbiota richness was similar in bile and intestinal fluid;Beta diversity analysis showed that there were differences in the composition between biliary microbiota and the duodenal microbiota,but the abundance of the main groups showed similarities.The composition of the biliary microbiota from gallstone patients was more complex,as was the duodenal microbiota.Proteobacteria and Firmicutes were the dominant bacteria at phylum level,accounting for at least 75%of the total reads in each subgroup.Pseudomonas and EscherichiaShigella were the major genus among subgroups,but Escherichia-Shigella had increased abundance in duodenal microbiota with primary choledocholithiasis,which may play an important role in stone formation.It is noteworthy that Clostridiumsensu_stricto,Lachnospiraceae_UCG-008,Butyrivibrio and Roseburia which could produce short chain fatty acids(SCFAs),were significantly decreased in biliary microbiota with primary CBD stones(p<0.05).Our study provided new insights into the compositional of normal biliary microbiota.The micro-ecology of biliary and duodenal in patients with stones is complex and closely related,and there is a potential for dysbacteriosis.The decrease in abundance of certain major acid-producing bacteria affects the health of the biliary tract and thus leads to the formation of stones. | Zhitang Lyu Tingting Yu Lichao Zhang Xiaona Xu Yijun Zhang Jihong Li Zhirong Li Wei Zhang Senlin Hou | 2021 | Synthetic and Systems Biotechnology2021，6，4： | 2 |
| 10 | Surface modification with oxygen vacancy in Li-rich layered oxide Li1.2Mn0.54Ni0.13Co0.13O2 for lithium-ion batteries显示文摘A couple of layered Li-rich cathode materials Li1.2Mn0.54Ni0.13Co0.13O2 without any carbon modification are successfully synthesized by solvothermal and hydrothermal methods followed by a calcination process. The sample synthesized by the solvothermal method(S-NCM) possesses more homogenous microstructure, lower cation mixing degree and more oxygen vacancies on the surface, compared to the sample prepared by the hydrothermal method(H-NCM). The S-NCM sample exhibits much better cycling performance, higher discharge capacity and more excellent rate performance than H-NCM. At 0.2 C rate,the S-NCM sample delivers a much higher initial discharge capacity of 292.3 mAh g^-1 and the capacity maintains 235 m Ah g^-1 after 150 cycles(80.4% retention), whereas the corresponding capacity values are only 269.2 and 108.5 m Ah g^-1(40.3% retention) for the H-NCM sample. The S-NCM sample also shows the higher rate performance with discharge capacity of 118.3 mAh g^-1 even at a high rate of 10 C, superior to that(46.5 m Ah g^-1) of the H-NCM sample. The superior electrochemical performance of the S-NCM sample can be ascribed to its well-ordered structure, much larger specific surface area and much more oxygen vacancies located on the surface. | Bozhou Chen Bangchuan Zhao Jiafeng Zhou Zhitang Fang Yanan Huang Xuebin Zhu Yuping Sun | 2019 | Journal of Materials Science & Technology2019，35，6： | 2 |
| 11 | Comparison of gut microbiota in autism spectrum disorders and neurotypical boys in China:A case-control study显示文摘Background:Autism spectrum disorders(ASDs)are a set of complex neurobiological disorders.Growing evidence has shown that the microbiota that resides in the gut can modulate brain development via the gut–brain axis.However,direct clinical evidence of the role of the microbiota–gut–brain axis in ASD is relatively limited.Methods:A case-control study of 71 boys with ASD and 18 neurotypical controls was conducted at China-Japan Friendship Hospital.Demographic information and fecal samples were collected,and the gut microbiome was evaluated and compared by 16S ribosomal RNA gene sequencing and metagenomic sequencing.Results:A higher abundance of operational taxonomic units(OTUs)based on fecal bacterial profiling was observed in the ASD group.Significantly different microbiome profiles were observed between the two groups.At the genus level,we observed a decrease in the relative abundance of Escherichia,Shigella,Veillonella,Akkermansia,Provindencia,Dialister,Bifidobacterium,Streptococcus,Ruminococcaceae UCG_002,Megasphaera,Eubacterium_coprostanol,Citrobacter,Ruminiclostridium_5,and Ruminiclostridium_6 in the ASD cohort,while Eisenbergiella,Klebsiella,Faecalibacterium,and Blautia were significantly increased.Ten bacterial strains were selected for clinical discrimination between those with ASD and the neurotypical controls.The highest AUC value of the model was 0.947.Conclusion:Significant differences were observed in the composition of the gut microbiome between boys with ASD and neurotypical controls.These findings contribute to the knowledge of the alteration of the gut microbiome in ASD patients,which opens the possibility for early identification of this disease. | Fang Ye Xinying Gao Zhiyi Wang Shuman Cao Guangcai Liang Danni He Zhitang Lv Liming Wang Pengfei Xu Qi Zhang | 2021 | Synthetic and Systems Biotechnology2021，6，2： | 2 |
| 12 | The influence of silicon - containing acrylate as active diluent on the properties of UV- cured epoxydiacrylate films显示文摘 | LIU HONGBO CHEN MINGCAI HUANG ZHITANG | 2004 | European Polymer Journal2004，40，3： | 1 |
| 13 | Influence of Pb excess on the properties of lead lanthanum titanate ferroelectric thin films on Pt and LaNiO3 electrodes 显示文摘 | Song Zhitang Ren Wei Fu Xiaorong | 2001 | J Phys: Condensed Matter2001，13，1： | 1 |
| 14 | 显示文摘 | Liu Hongbo Chen Mingcai Huang Zhitang | 2004 | Eur Polym J2004，3，： | 1 |
| 15 | The new technology for improving heat effect of pyroelectric infrared detector 显示文摘 | Song Zhitang Feng Songlin Lin Chenglu | 2004 | Ceramics International2004，30，： | 1 |
| 16 | The Influence of silicon-containing acrylate as active diluent on the properties of UV-cured epoxydiacrylate films显示文摘 | HONGBO LIU MINGCAI CHEN ZHITANG HUANG | 2004 | Eur Polym J2004，，3： | 1 |
| 17 | Effect of abrasive particle concentration on preliminary chemical mechanical polishing of glass substrate显示文摘 | Zefang Zhang Weili Liu Zhitang Song | 2010 | Microelectronic Engineering2010，，11： | 1 |
| 18 | Ciria concentration effect on chemical mechanical polishing of optical glass显示文摘 | Liangyong Wang Kailiang Zhang Zhitang Song | 2007 | Applied Surface Science2007，253，11： | 1 |
| 19 | Effect of structural transformation on the electrical properties for GelShzTe4 thin film 显示文摘 | Zhang Ting Song Zhitang Liu Bo | 2007 | Thin Solid Films2007，516，1： | 1 |
| 20 | The influence of silicon-containing acrylate as active diluent on the properties of UV-cured epoxydiacrylate films 显示文摘 | Liu Hongbo ChenMingcai Huang Zhitang | 2004 | European Polymer Journal2004，40，： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员