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Iodine-assisted ultrafast growth of high-quality monolayer MoS_(2) with sulfur-terminated edges

National Science Open 2023年第4期2卷 43-54页

作者： Qinke Wu Jialiang Zhang Lei Tang Usman Khan Huiyu Nong Shilong Zhao Yujie Sun rongxu zheng Rongjie Zhang Jingwei Wang Junyang Tan Qiangmin Yu Liqiong He Shisheng Li Xiaolong Zou Hui-Ming Cheng Bilu Liu Shenzhen Geim Graphene Center Tsinghua-Berkeley Shenzhen Institute and Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China Institute of Functional Porous Materials School of Materials Science and EngineeringZhejiang Sci-Tech UniversityHangzhou 310018China International Center for Materials Nanoarchitectonics National Institute for Materials ScienceTsukuba 305-0044Japan Faculty of Materials Science and Engineering/Institute of Technology for Carbon Neutrality Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Shenyang National Laboratory for Materials Sciences Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Advanced Technology Institute University of SurreyGuildfordSurrey GU27XHUK

Two-dimensional(2D)semiconductors have attracted great attention to extend Moore’s law,which motivates the quest for fast growth of high-quality ***,taking MoS_(2) as an example,current methods yield 2D MoS_(2) with a low growth rate and poor quality with vacancy concentrations three to five orders of magnitude higher than silicon and other commercial ***,we develop a strategy of using an intermediate product of iodine as a transport agent to carry metal precursors efficiently for ultrafast growth of high-quality MoS_(2).The grown MoS_(2) has the lowest density of sulfur vacancies(~1.41×10^(12) cm^(−2))reported so far and excellent electrical properties with high on/off current ratios of 108 and carrier mobility of 175 cm^(2) V^(−1) s^(−1).Theoretical calculations show that by incorporating iodine,the nucleation barrier of MoS_(2) growth with sulfur-terminated edges reduces *** sufficient supply of precursor and low nucleation energy together boost the ultrafast growth of sub-millimeter MoS_(2) domains within *** work provides an effective method for the ultrafast growth of 2D semiconductors with high quality,which will promote their applications.

关键词： 2D semiconductors molybdenum disulfides ultrafast growth defect density sulfur vacancy iodine-assisted sulfur-terminated edge

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Dual-metal precursors for the universal growth of non-layered 2D transition metal chalcogenides with ordered cation vacancies

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Science Bulletin 2022年第16期67卷 1649-1658,M0004页

作者： Junyang Tan Zongteng Zhang Shengfeng Zeng Shengnan Li Jingwei Wang rongxu zheng Fuchen Hou Yinping Wei Yujie Sun Rongjie Zhang Shilong Zhao Huiyu Nong Wenjun Chen Lin Gan Xiaolong Zou Yue Zhao Junhao Lin Bilu Liu Hui-Ming Cheng Shenzhen Geim Graphene Center Tsinghua-Berkeley Shenzhen Institute and Institute of Materials ResearchShenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China Department of Physics and Shenzhen Key Laboratory of Advanced Quantum Functional Materials and Devices Southern University of Science and TechnologyShenzhen 518055China School of Electronic Information Engineering Foshan UniversityFoshan 528000China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Faculty of Materials Science and Engineering/Institute of Technology for Carbon Neutrality Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China

Two-dimensional(2D)transition metal chalcogenides(TMCs)are promising for nanoelectronics and energy *** them,the emerging non-layered TMCs are unique due to their unsaturated dangling bonds on the surface and strong intralayer and interlayer ***,the synthesis of non-layered 2D TMCs is challenging and this has made it difficult to study their structures and properties at thin thickness ***,we develop a universal dual-metal precursors method to grow non-layered TMCs in which a mixture of a metal and its chloride serves as the metal *** hexagonal Fe_(1-x)S as an example,the thickness of the Fe_(1-x)S flakes is down to 3 nm with a lateral size of over 100 μ***,we find ordered cation Fe vacancies in Fe_(1-x)S,which is distinct from layered TMCs like MoS_(2) where anion vacancies are commonly ***-temperature transport measurements and theoretical calculations show that 2D Fe_(1-x)S is a stable semiconductor with a narrow bandgap of60 *** addition to Fe_(1-x)S,the method is universal in growing various non-layered 2D TMCs containing ordered cation vacancies,including Fe_(1-x)Se,Co_(1-x)S,Cr_(1-x)S,and V_(1-x)*** work paves the way to grow and exploit properties of non-layered materials at 2D thickness limit.

关键词： Non-layered two-dimensional materials Transition metal chalcogenides Dual-metal precursors Chemical vapor deposition Ordered cation vacancies

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Effects of non-starch polysaccharides enzymes on pancreatic and small intestinal digestive enzyme activities in piglet fed diets containing high amounts of barley

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World Journal of Gastroenterology 2004年第6期10卷 856-859页

作者： Wei-FenLi JieFeng Zi-rongxu Cai-MeiYang AnimalScienceCollege ZhejiangUniversityTheKeyLaboratoryofMolecularAnimalNutritionMinistryofEducationHangzhou310029ZhejiangProvinceChina

AIM:To investigate effects of non-starch polysaccharides(NSP)enzymes on pancreatic and small intestinal digestive enzyme activities in piglet fed diets containing high amounts of ***:Sixty crossbred piglets averaging 13.5kg were randomly assigned to two treatment groups with three replications (pens) based on sex and mass. Each group was fed on the diet based on barley with or without added NSP enzymes (0.15%) for a 40-d period. At the end of the experiment the pigs were weighed. Three piglets of each group were chosen and slaughtered. Pancreas, digesta from the distal end of the duodenum and jejunal mucosa were collected for determination. Activities of the digestive enzymes trypsin, chymotrypsin, amylase and lipase were determined in the small intestinal sections as well as in homogenates of pancreatic ***,sucrase,lactase and γ-glutamyl transpeptidase (γ-I-) activities were analyzed in jejunal ***:Supplementation with NSP enzymes improved growth performance of *** showed that NSP enzymes had no effect on digestive enzyme activities in pancreas,but decreased the activities of proteolytic enzyme,trypsin,amylase and lipase in duodenal contents by 57.56%,76.08%,69.03% and 40.22%(P<0.05) compared with control,and increased γ-GT activities in jejunal mucosa by 118.75%(P<0.05).CONCLUSION:Supplementation with NSP enzymes in barley based diets could improve piglets' growth performance,decrease activities of proteolytic enzyme, trypsin, amylase and lipase in duodenal contents and increase γ-GT activities in jejunal mucosa.

关键词：非淀粉性多聚糖酶胰酶肠内消化酶大麦动物实验 γ-谷酰氨酸转肽酶

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Synthesis of Novel Benzoylphenylurea Chitin Inhibitors from Chlorothalonil

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Chinese Chemical Letters 2003年第12期14卷 1219-1222页

作者： JunLIN ShengJiaoYAN DeShouMAO rongxu LiJuanYANG FuChuLIU DepartmentofAppliedChemistry YunnanUniversityKunming650091 StateKeyLaboratoryofElemento-organicChemistry NankaiUniversityTianjin300071

Twenty-six novel benzoylphenylurea chitin inhibitor derivatives have been synthesized in over 30~50% yield from chlorothalonil 1 via sequential fluorine exchange, aminolysis, hydrolysis, decarboxylation and acylation ... 详细信息

关键词： Benzoylphenylureas chitin inhibitor chlorothalonil.

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Comparison of the Efficacy of Pterygium Resection Combined with Conjunctival Autograft versus Pterygium Resection Combined with Amniotic Membrane Transplantation

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Eye Science 2012年第2期27卷 102-105页

作者： Wanhong Liang rongxu Li Xingyun Deng Department of Ophthalmology Taiping People＇s Hospital of Dongguan Dongguan 523900 China

Purpose:To compare the efficacy of pterygium resection combined with conjunctival autograft versus pterygium resection combined with amniotic membrane transplantation in the treatment of pterygium. Methods: A total of 118 cases (133 eyes) were randomly assigned to receive pterygium resection combined with conjunctival autograft (n=81) or pterygium resection combined with amniotic membrane transplantation(n=52)..Corneal wound healing and neovascularization and the presence or absence of conjunctival proliferation and hyperemia were analyzed at 12 months post-operatively. Results: In the conjunctival autograft group, 6 eyes (7.4%) had recurrent pterygium,.while in the amniotic membrane transplantation group, 10 eyes showed recurrence (19.2%,P<0.05,.chi-square)..Patients in the conjunctival autograft group recovered significantly faster compared with those in the amniotic membrane transplantation group. Conclusion:.Patients receiving pterygium surgery combined with conjunctival autograft had lower recurrence rates and experience faster recovery compared with those undergoing pterygium resection combined with amniotic membrane transplantation.

关键词：羊膜移植自体移植疗效比较结膜切除术肉复发率移植治疗

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RESPONSE OF EARLY STAGE BULKY CERVICAL SQUAMOUS CARCINOMA TO PREOPERATIVE ADJUVANT CHEMOTHERAPY

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Chinese Medical Sciences Journal 2004年第2期19卷 116-119页

作者： HuaLingh Xiao-rongxu Yao-yuMei Jun-yingTang Liang-danTang TongSun DepartmentofObstetricsandGynecology theFirstAffiliatedHospitalChongqingUniversityofMedicalSciencesChongqing400012

Objective To investigate the potential role of preoperative adjuvant chemotherapy on early stage cervical squamous carcinoma with bulky tumor. Methods One hundred and forty-five patients with cervical squamous cancer stagesⅠb-Ⅱa were investigated, among which17 patients with bulky tumors (≥4 cm) were managed by cisplatin-based chemotherapy for 1-2 courses followed by radical hysterectomy and pelvic lymphadenectomy (BC group). The change of tumor size, pelvic lymph nodes metastasis, cervical wall invasion, the involvement of surgical specimen margin, and the blood loss during operation were assessed after opera-tion and compared with those in 51 patients with bulky tumors (BN group) and 77 patients with small local tumors (S group) who underwent surgery directly. Results (1) The tumor size of 17 patients in BC group were decreased in various degrees after chemotherapy, with 13 pati-ents of clinical effectiveness (76.47%). And the responsiveness pertained to neither histological differentiation nor size of local tumors. (2) Post-operative histology has showed that patients in BC and BN group have higher incidence of lymph node metastasis and deep cervical infiltration (5/68 and 3/68, respectively) than in S group (1/77 and 1/77, respectively) while with no statistical significance. (3) Blood loss during operation in BC group was less than BN and S group. (4) Seventeen patients, including those underwent surgeries of vaginal prolongation and/or ovarian transposition, appeared disease-free survival within the follow-up time. Conclusions Most of patients with bulky early stage cervical squamous carcinoma are sensitive to cisplatin-based chem-otherapy, which could greatly reduce local tumor size and in turn facilitate the following operation by well controlling blood loss.

关键词： cervical carcinoma bulky tumor chemotherapy

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Inhibitory effects of docetaxel on expression of VEGF, bFGF and MMPs of LS174T cell

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World Journal of Gastroenterology 2003年第9期9卷 1995-1998页

作者： Xue-LiangGuo Geng-JinLin HongZhao YangGao U-PingQian San-rongxu Li-NaFu Qingxu Jie-JunWang DepartmentofGastroenterology HuashanHospitalFudanUniversityShanghai200032China Medicaloncology ChangzhengHospitalSecondMilitaryMedicalUniversityShanghai200003.China DepartmentofGastroenterology Shandon~ProvincialHospitalJinan250021China

AIM: To study the effects of non-cytotoxJc concentrations of docetaxel on some important angiogenic factors of LS174T ***: The non-cytotoxic concentration of docetaxel and the activity of gelatinase were determined with MTT and gelatin zymography respectively, the expression of VEGF (vascular endothelial growth factor), bFGF (basic fibroblast growth factor), MMP (matrix metalloproteinase) 2 and MMP 9 was investigated with RT-PCR and Western ***: The maximum non-cytotoxic concentration of docetaxel on LS174T Cells was 1.0 ng/ml. Compared with the solvent control group, 0.1, 0.5, 1.0 ng/ml of docetaxel could downregulate the expression of VEGF, bFGF, MMP 2and MMP 9 and suppress the activity of ***: Our study suggests that the non-cytotoxic concentrations of docetaxel have strong antiangiogenic activity on LS174T Cells, which suggests docetaxel may be a promising antiangiogenic agent.

关键词： LS174T细胞结肠直肠癌血管内皮生长因子碱性纤维生长因子基质金属蛋白酶逆转录聚合酶链反应

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Discovering the communication structures of directed weighted citation networks in library and information science through Pathfinder

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Data Science and Informetrics 2021年第4期1卷 76-83页

作者： Ruimin Ma rongxu Zhang School of Economics and Management Shanxi UniversityTaiyuanChina School of Govemment Beijing Normal UniversityBeijingChina

Communication structures mining is of importance for the understanding of the communities of a domain and knowledge flow among papers and *** this paper,we take advantage of Pathfinder,a method for pruning networks,to discover the communities of a directed weighted citation network and its main knowledge flow ***,in the course of the analysis,necessary data transformations are carried out,and proper parameters for Pathfinder are *** is found that Pathfinder plays a multifaceted role in the discovery of communication structures of directed weighted citation networks,which could provide more systematic insights to citation network analytics.

关键词： Communica tion structure Citation network Knowledge flow Community Pathfinder

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Effect of novel accelerated intermittent theta burst stimulation on suicidal ideation in adolescent patients with major depressive episode:a randomised clinical trial

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General Psychiatry 2024年第2期37卷 292-296页

作者： Dong Huang Shuming Zhong Xiaodong Song rongxu Zhang Shunkai Lai Yanbin Jia Department of Psychiatry First Affiliated Hospital of Jinan UniversityGuangzhouGuangdongChina

To the editor:Affective disorders,including major depressive disorder(MDD)and bipolar disorder,have emerged as the primary cause of adolescent ***,suicide mostly occurs in the major depressive episode(MDE)of affective *** ideation(SI)has been identified as an immediate precursor to suicide,such that reducing its severity is conducive to suicide prevention in adolescents.

关键词： prevention editor stimulation

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水电建设项目物资供应链管理要素分析

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水力发电学报 2011年第1期30卷 180-186页

作者：杨荣旭强茂山清华大学项目管理与建设技术研究所水沙科学与水利水电工程国家重点实验室北京100084

水电建设的物资供应链管理模式得到了越来越多的重视和应用。本文对8个水电开发项目进行调查研究,在识别水电建设项目供应链管理要素的基础上,从定量和定性两个方面分析了管理要素对于物流绩效指标的影响和相关性,揭示其中的作用机理,... 详细信息

水电建设的物资供应链管理模式得到了越来越多的重视和应用。本文对8个水电开发项目进行调查研究,在识别水电建设项目供应链管理要素的基础上,从定量和定性两个方面分析了管理要素对于物流绩效指标的影响和相关性,揭示其中的作用机理,确定了供应链管理要素重要性排序为:供应链管理认知、信息交流技术、变更管理能力、信息交流质量、知识沉淀和分享、信息的交流。研究表明供应链管理认知是各项紧密围绕的核心性要素。

关键词：水电建设项目供应链管理要素相关性分析绩效

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