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Molecule-based vertical transistor via intermolecular charge transport throughπ-πstacking

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Nano Research 2024年第5期17卷 4573-4581页

作者： Cheng liu Cheng Fu Lingyu Tang Jianghua Wu Zhangyan Mu yamei Sun Yanghang Pan Bailin Tian Kai Bao Jing Ma Qiyuan He Mengning Ding Key Laboratory of Mesoscopic Chemistry School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Jiangsu Key Laboratory of Advanced Organic Materials School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China National Laboratory of Solid State Microstructures Jiangsu Key Laboratory of Artificial Functional MaterialsCollege of Engineering and Applied SciencesCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China Department of Materials Science and Engineering City University of Hong KongHong Kong 999077China

Theπ-πstacking is a well-recognized intermolecular interaction that is responsible for the construction of electron hopping channels in numerous conducting frameworks/***,the exact role ofπ-to-πchannels within typical single crystalline organic semiconductors remains unclear as the orientations of these molecules are diverse,and their control usually requires additional side chain groups that misrepresent the intrinsic properties of the original semiconducting ***,the construction of conduction channels with intrinsicπ-πstacking in the molecule-based device is crucial for the utilization of their unique transport characteristics and understanding of the transport *** this end,we present a molecular intercalation strategy that integrates two-dimensional layered materials with functional organic semiconductor molecules for functional molecule-based *** organic semiconductor molecules can be effectively intercalated into the van der Waals gaps of semi-metallic TaS_(2) withπ-πstacking configuration and controlled intercalant *** results show that the vertical charge transport in the stacking direction shows a tunneling-dominated mechanism that strongly depends on the molecular ***,we demonstrated a new type of molecule-based vertical transistor in which TaS_(2) andπ-πstacked organic molecules function as the electrical contact and the active channel,***/off ratios as high as 447 are achieved under electrostatic modulation in ionic liquid,comparable to the current state-of-the-art molecular *** study provides an ideal platform for probing intrinsic charge transport acrossπ-πstacked conjugated molecules and also a feasible approach for the construction of high-performance molecule-based electronic devices.

关键词： π-πstacking electrochemical intercalation organic semiconductor electrical transport tunneling field effect transistor

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基于区域数据初中数学增值评价的实证研究

上海教育科研 2022年第8期 34-39页

作者：刘亚梅上海市奉贤区教育学院 201499

在借鉴国内外增值评价模型的基础上,该研究对区域某届学生的数学学业成绩进行追踪,并采用多层线性分析模型、多水平线性分位数回归模型进行增值评价分析。其中多层线性分析模型分析学校的增值表现,多水平线性分位数回归模型进一步分析... 详细信息

在借鉴国内外增值评价模型的基础上,该研究对区域某届学生的数学学业成绩进行追踪,并采用多层线性分析模型、多水平线性分位数回归模型进行增值评价分析。其中多层线性分析模型分析学校的增值表现,多水平线性分位数回归模型进一步分析需要关注的学校,运用增值与学业成绩的象限分析,确定学校需要关注的学生类型。使用增值评价结果时,应结合学校实际情况查找原因,实施教学,而非仅看评价结果。

关键词：区域初中数学增值评价

Kinetically Controlled Self-Assembly of Phthalocyanine–Peptide Conjugate Nanofibrils Enabling Superlarge Redshifted Absorption

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CCS Chemistry 2019年第2期1卷 173-180页

作者： Luyang Zhao Shukun Li yamei liu Ruirui Xing Xuehai Yan State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Center for Mesoscience Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China

Supramolecular assembly could in principle lead to redshifted absorption through J-aggregation of chromophores,which would be a highly promising method for achieving near-infrared materials with improved functionality and *** effectively enhance the material functionalities,one of the great challenges remaining is to achieve an aggregation statewith a redshift larger than 100 nm.

关键词： phthalocyanine peptide self-assembly redshift absorption nanofibers

Mechanism of Pediococcuspentosaceus PP04 in Alleviating High-fat Diet Caused Hyperlipidemiavia Modulation of Intestinal Flora and It′s Metabolites

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Food Science and Human Wellness 2024年

作者： Yu Wang Xinyue Xing yamei He Yue Zhang Yuxuan Ma Bo Nan Xia Li Yuhua Wang Jingsheng liu College of Food Science and Engineering Jilin Agricultural University Jilin Province Innovation Center for Food Biological Manufacture Jilin Agricultural University National Processing Laboratory for Soybean Industry and Technology National Engineering Research Center for Wheat and Corn Deep Processing

The gut microbiota and it′s metabolism are vital targets of probiotics regulating high fat-diet (HFD) induced hyperlipidemia， which can relieve the pressure caused by the striking growth of sub-health people. Pediococcus pentosaceus PP04 (PP04) could colonize in intestine to regulate gut microbiota and it′s metabolites directly， the rebalanced intestinal flora mediated by PP04 could facilitate the secretion of short chain fatty acids to control body weight gain， PP04 intervention also changed bile acids (BAs) profiles and enhanced the ileal concentrations of antagonists including tauro-α/β-muricholic acid sodium salt and ursodeoxycholic acid to inhibit intestinal farnesoid X receptor/fibroblast growth factor 15 (FXR/FGF15) signaling coupled with the activation of hepatic FXR/small heterodimer partners signaling (SHP)， which accelerated the hepatic BAs de novo synthesis and excretion with feces to eliminate HFD caused hyperlipemia effectively. This study provided important evidence regarding PP04 as dietary supplement to relieve hyperlipidemia by influencing BAs enterohepatic circulation.

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振动辅助纳米压印制备双面光栅结构薄膜

光子学报 2022年第6期51卷 275-285页

作者：刘亚梅马海航谷岩黄洲张顺长春工业大学机电工程学院长春130012

针对纳米压印过程中压印胶填充率低导致图案转移质量不佳,压印力过大损坏模板表面形貌等问题,提出一种基于压电驱动低频、低幅的振动辅助纳米压印方法制备光栅结构。在压印时施加横向一维振动,减小纳米压印过程中所需的压印力,提高压印... 详细信息

针对纳米压印过程中压印胶填充率低导致图案转移质量不佳,压印力过大损坏模板表面形貌等问题,提出一种基于压电驱动低频、低幅的振动辅助纳米压印方法制备光栅结构。在压印时施加横向一维振动,减小纳米压印过程中所需的压印力,提高压印胶对模板空腔的填充率。为研究双面光栅薄膜的周期变化对透射率的影响规律,运用时域有限差分法在波长500~1500 nm范围内对不同周期参数的双面光栅结构进行仿真分析,得到周期参数变化对透射率的影响规律。在研制的振动装置上进行振动辅助纳米压印实验,并对制备出的双面光栅结构进行表面形貌表征以及透射率检测。实验结果表明,与无振动纳米压印技术相比,压印胶填充率显著提高,并改善了图案转移质量,减少大面积表面缺陷。在波长500~1500 nm范围内,涂覆振动辅助纳米压印制备的双面光栅薄膜的SiO_(2)比传统纳米压印制备的双面光栅薄膜的SiO_(2)平均透射率提高4%,较无薄膜的SiO2平均透射率提高6%。

关键词：纳米压印光栅结构振动辅助薄膜填充率透射率

丁酸梭菌发酵培养基的优化及发酵产物对黄曲霉毒素B_(1)的降解

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微生物学通报 2023年第10期50卷 4533-4543页

作者：刘亚妹丛丽娜陈明大连工业大学生物工程学院辽宁大连116034

【背景】丁酸梭菌是专性厌氧的新一代芽孢益生菌,耐热、耐酸、抗逆性强,极具应用价值和开发前景。【目的】优化丁酸梭菌发酵培养基并初步研究其发酵液对黄曲霉菌的抑制作用和降解黄曲霉毒素B_(1)(aflatoxin B_(1),AFB_(1))的能力。【方... 详细信息

【背景】丁酸梭菌是专性厌氧的新一代芽孢益生菌,耐热、耐酸、抗逆性强,极具应用价值和开发前景。【目的】优化丁酸梭菌发酵培养基并初步研究其发酵液对黄曲霉菌的抑制作用和降解黄曲霉毒素B_(1)(aflatoxin B_(1),AFB_(1))的能力。【方法】利用响应面法对发酵培养基进行优化,采用牛津杯法对丁酸梭菌发酵液抑制黄曲霉菌生长进行研究,并通过酶联免疫法测定发酵液对AFB_(1)的降解能力。【结果】优化后的发酵培养基为:葡萄糖18.1g/L,大豆蛋白胨29.7g/L,磷酸氢二钾3.8 g/L,氯化钠2.0 g/L,乙酸钠4.0 g/L,结晶硫酸镁1.2 g/L,L-半胱氨酸盐酸盐0.3 g/L。优化后的丁酸梭菌生物量由8.99×10^(8)个/mL提高至2.28×10^(9)个/mL,是优化前的2.54倍。丁酸梭菌发酵液对致病真菌黄曲霉菌的抑菌效果十分显著,其上清液经浓缩后对AFB_(1)降解72h的降解率达到68.65%,初步分析表明上清液中对AFB1具有脱毒作用的活性组分为丁酸梭菌分泌产生的胞外酶。【结论】本研究通过发酵培养基优化明显提高了丁酸梭菌的生物量,并将其应用于抑制黄曲霉菌的生长与降解AFB1,为丁酸梭菌的规模化生产及其微生态制剂的开发应用提供了科学依据。

关键词：丁酸梭菌培养基优化生物量黄曲霉毒素B_(1) 降解

平面工艺IGBT制作及导通压降的PIN模型计算

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西南交通大学学报 2009年第5期44卷 648-653页

作者：袁寿财刘亚媚赣南师范学院物理与电子信息学院江西赣州341000

以硅平面工艺生产设备为基础，设计制作了基于外延衬底的IGBT器件，器件的实测输出电流-电压特性良好，阈值电压在3．7～4．8V之间．将制作IGBT器件的结构和工艺参数代入PIN二极管模型计算其正向导通压降，并将计算结果与器件的实测参... 详细信息

以硅平面工艺生产设备为基础，设计制作了基于外延衬底的IGBT器件，器件的实测输出电流-电压特性良好，阈值电压在3．7～4．8V之间．将制作IGBT器件的结构和工艺参数代入PIN二极管模型计算其正向导通压降，并将计算结果与器件的实测参数进行了比较．结果表明：小电流区段符合较好；但大电流区段由于模型简化和测试系统寄生串联电阻的影响出现偏差，对于同一导通电流，计算值比实测值约小8％．

关键词：绝缘栅双极晶体管设计工艺 PIN模型制作

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青斑样血管病的病理特征探讨

华中科技大学学报（医学版） 2022年第4期51卷 550-552页

作者：马梦兰刘亚美曹育春华中科技大学同济医学院附属同济医院皮肤科武汉430030

目的探讨青斑样血管病(livedoid vasculopathy,LV)的特征性病理表现。方法收集华中科技大学同济医学院附属同济医院确诊的24例早期青斑样血管病及32例变应性血管炎患者的临床资料并进行前瞻性病理随访观察,采用平行对照和自身前后对照... 详细信息

目的探讨青斑样血管病(livedoid vasculopathy,LV)的特征性病理表现。方法收集华中科技大学同济医学院附属同济医院确诊的24例早期青斑样血管病及32例变应性血管炎患者的临床资料并进行前瞻性病理随访观察,采用平行对照和自身前后对照比较分析青斑样血管病的病理特征。结果早期青斑样血管病的组织病理表现为真皮浅层血管内透明血栓形成、管周少量淋巴细胞浸润及血管壁透明变性比率高于变应性血管炎组(均P0.05),进展期出现血管壁透明变性比率高于早期(P<0.05)。结论真皮浅层血管内透明血栓形成及管周少量淋巴细胞浸润可视为青斑样血管病的特征性病理改变。

关键词：青斑样血管病变应性血管炎病理特征

Spirobifluorene-Based Three-Dimensional Covalent Organic Frameworks with Rigid Topological Channels as Efficient Heterogeneous Catalyst

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CCS Chemistry 2021年第4期3卷 2418-2427页

作者： yamei liu Chenyu Wu Qingzhu Sun Fan Hu Qingyan Pan Jing Sun Yinghua Jin Zhibo Li Wei Zhang Yingjie Zhao College of Polymer Science and Engineering Qingdao University of Science and TechnologyQingdao 266042 Department of Chemistry University of ColoradoBoulderCO 80309 School of Chemical Engineering The University of New South WalesSydneyNSW 2052

Although the past decade has witnessed tremendous progress in the development of covalent organic frameworks(COFs),three-dimensional(3D)COFs fabrications and characterizations are still much less studied compared with two-dimensional(2D)COFs,due to their complicated topology structures caused by interpenetration and limited choices of node-building *** this work,we constructed a novel 3D COF(SP-3D-COF-BPY)successfully using orthogonal dual-planar spirobifluorene and bipyridine as building ***,we demonstrated the application of 3D COF-supported Pd(II)catalyst in heterogeneous catalysis.A sevenfold interpenetrated dia structure was revealed for SP-3DCOF-BPY by powder X-ray diffraction(PXRD)in conjunction with structural simulation and Pawley *** bipyridine-linked frameworks bear one-dimensional(1D)unobstructed rigid channels and offer a high density of discrete coordination sites for chelating Pd(II)*** high loading of Pd(II)(∼15 wt%)was achieved in the asymmetric(as)-prepared Pd(II)@*** generated highly ordered porous channels and easily accessible catalytic sites,such as COF-supported Pd(II)complex,serves as a highly active and stable microporous heterogeneous catalyst in Suzuki–Miyaura coupling *** observed catalytic efficiency was high and the catalyst could be conveniently reused multiple times without any noticeable decay in catalytic performance.

关键词： covalent organic frameworks spirobifluorene heterogeneous catalysis palladium Suzuki-Miyaura coupling