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240 nm AlGaN-based deep ultraviolet micro-LEDs:size effect versus edge effect

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Journal of Semiconductors 2024年第1期45卷 55-62页

作者： Shunpeng Lu Jiangxiao Bai Hongbo Li Ke Jiang Jianwei Ben shanli Zhang Zi-Hui Zhang Xiaojuan Sun Dabing Li State Key Laboratory of Luminescence and Applications Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Key Laboratory of Electronic Materials and Devices of Tianjin School of Electronics and Information EngineeringHebei University of TechnologyTianjin 300401China

240 nm AlGaN-based micro-LEDs with different sizes are designed and ***,the external quantum efficiency(EQE)and light extraction efficiency(LEE)are systematically investigated by comparing size and edge ***,it is revealed that the peak optical output power increases by 81.83%with the size shrinking from 50.0 to 25.0μ***,the LEE increases by 26.21%and the LEE enhancement mainly comes from the sidewall light *** notably,transversemagnetic(TM)mode light intensifies faster as the size shrinks due to the tilted mesa side-wall and Al reflector ***,when it turns to 12.5μm sized micro-LEDs,the output power is lower than 25.0μm sized *** underlying mechanism is that even though protected by SiO2 passivation,the edge effect which leads to current leakage and Shockley-Read-Hall(SRH)recombination deteriorates rapidly with the size further ***,the ratio of the p-contact area to mesa area is much lower,which deteriorates the p-type current spreading at the mesa *** findings show a role of thumb for the design of high efficiency micro-LEDs with wavelength below 250 nm,which will pave the way for wide applications of deep ultraviolet(DUV)micro-LEDs.

关键词： AlGaN deep ultraviolet micro-LEDs light extraction efficiency size effect edge effect

Geochronology and Geochemical Characteristics of Intrusion in the Jinchangliang Gold Deposit,Inner Mongolia and Their Tectonic Significance

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Acta Geologica Sinica(English Edition) 2015年第6期89卷 1947-1962页

作者： SUN Zhenjun SUN Guosheng YU Henan TIAN Yi LIU shanli XIANG Zhu MENG Jian XUE Huaiyu LU Lina Department of Earthquake Science Institute of disaster prevention Science and Technology College of Earth Sciences Jilin University Liaoning Survey Academy of Geology and Mineral Resources Geophysical Research Institute of Jilin Province

Discovered and mined in recent years, the Jinchangliang gold deposit has not yet been studied in its genetic type. In this paper, the geological features of ore deposit, S isotopic composition, metallogenic age and elements geochemical of the granite closely related to mineralization were discussed. The results of the geological features of ore deposit and S isotopic composition show that ore-bearing hydrothermal solution was closely related with the intrusion of magmatic. The granite is characteristic of high silica SiO2=72.38%–72.98%, high aluminum and Al2O3=14.22%–14.35%, low calcium CaO=0.16% –0.26%, and low value of FeOT/MgO（6.86–7.73）, and rich in alkalis Na2O+K2O=9.11%–9.24%, suggesting that it is high-K calc-alkaline, highly fractionated, weak aluminum A-type granite. The REE patterns are inclined to right and show intense fractionation between LREE and HREE, without obvious negative Eu anomaly（δEu=0.80–0.84）. The primitive mantle-normalized spidergrams are characterized by depletion of Ba, U, Ta, Nb, Zr, Ti and P, which implies that the granite has the characteristics of the crust-mantle mixing. S isotopes also indicate that the material source of gold deposit is closely related to the granite rocks. The LA-ICP-MS Zircon UPb age of the Damiao rock mass medium-fine grained monzogranite（belonging to the early IndoChina） is（245±1） Ma. It shows that Jinchangliang gold deposit was not formed in Yanshanian, but the early Indo-China. Specifically speaking, the deposit was formed in the collision stage of the North China plate and the Siberian plate.

关键词： Geochemistry LA-ICP-MS zircon U-Pb dating Early Indo-China diagenesis and metallogenic Aohanqi Inner Mongolia

Development and application of stem cells

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Chinese Medical Journal 2005年第10期118卷 795-798页

作者： HUIGuo-zhen shanli-dong DepartmentofNeurosurgery FirstAffiliatedHospitalofSoochowUniversitySuzhou215006China aboratoryofNeurobiology MedicalSchoolofSoochowUniversitySuzhou215007China

Stem cells are defined by two important characteristics: the ability to proliferate by a process of self-renewal and the potential to form at least one specialized cell type. Transient population of pluripotent or multipotent stem cells first appear during the development at the first days post coitum. The cells of the inner cell mass (ICM) of the blastocyst, of which embryonic stem cells (ES) are the in vitro counterpart, can give rise to any differentiated cell type in the three primary germ layers of the embryo (endoderm, mesoderm and ectoderm).^(1-3) These cells gradually mature into committed, organ- and tissue-specific stem cells or adult stem cells, such as neural stem cells, mesenchymal stem cells, hematopoietic stem cells, etc. Over the past years, studies have focused on two aspects: molecular level and application, and some new methods and technology have been used.

关键词： Stem Cell Transplantation Animals Cloning Organism Drug Design Embryo Humans Neoplasms Signal Transduction Stem Cells

Rapid inactivation of human respiratory RNA viruses by deep ultraviolet irradiation from light-emitting diodes on a high-temperatureannealed AlN/Sapphire template

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Opto-Electronic Advances 2023年第9期6卷 31-43页

作者： Ke Jiang Simeng Liang Xiaojuan Sun Jianwei Ben Liang Qu shanli Zhang yang Chen Yucheng Zheng Ke Lan Dabing Li Ke Xu State Key Laboratory of Luminescence and Applications Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Virology College of Life SciencesWuhan UniversityWuhan 430072China Institute for Vaccine Research Animal Biosafety Level 3 LaboratoryWuhan UniversityWuhan 430072China

Efficient and eco-friendly disinfection of air-borne human respiratory RNA viruses is pursued in both public environment and portable *** AlGaN-based deep ultraviolet(DUV)light-emission diode(LED)has high practical potentials because of its advantages of variable wavelength,rapid sterilization,environmental protection,and ***,whether the emission wavelength has effects on the disinfection as well as whether the device is feasible to sterilize various respiratory RNA viruses under portable conditions is ***,we fabricate AlGaN-based DUV LEDs with different wavelength on high-temperature-annealed(HTA)AlN/Sapphire templates and investigate the inactivation effects for several respiratory RNA *** AlN/AlGaN superlattices are employed between the template and upper n-AlGaN to release the strong compressive stress(SCS),improving the crystal quality and interface *** LEDs with the wavelength of 256,265,and 278 nm,corresponding to the light output power of 6.8,9.6,and 12.5 mW,are realized,among which the 256 nm-LED shows the most potent inactivation effect in human respiratory RNA viruses,including SARS-CoV-2,influenza A virus(IAV),and human parainfluenza virus(HPIV),at a similar light power density(LPD)of~0.8 mW/cm2 for 10 *** results will contribute to the advanced DUV LED application of disinfecting viruses with high potency and broad spectrum in a portable and eco-friendly use.

关键词： AlGaN DUV LED superlattice SARS-CoV-2 influenza A virus

Toeplitz Operators and Algebras on Dirichlet Spaces

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Communications in Mathematical Research 1999年第1期 1-4页

作者： Cao Guangfu (Department of Mathematics, Sichuan University, Chengdu, 610064) Sun shanli

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ＬｅｔＤｂｅｔｈｅｕｎｉｔｄｉｓｋｉｎｔｈｅｃｏｍｐｌｅｘｐｌａｎｅＣ，ａｎｄｄＡ（ｚ）＝１πｄｘｄｙｔｈｅｎｏｒｍａｌｉｚｅｄＬｅｂｅｓｇｕｅｍｅａｓｕｒｅｏｎＤ．ＴｈｅＳｏｂｏｌｅｖｓｐａｃｅＬ２，１ｉｓｄｅｆｉｎｅｄｔｏｂｅｔｈｅｃｏｌｅｃｔｉ...

关键词： Dirichlet Space Toeplitz Operator Toeplitz Algebra

Configuration design of a 2D graphene/3D AlGaN van der Waals junction for high-sensitivity and self-powered ultraviolet detection and imaging

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Photonics Research 2024年第9期12卷 1858-1867页

作者： YUANYUAN YUE yang CHEN JIANHUA JIANG LIN YAO HAIYU WANG shanli ZHANG YUPING JIA KE JIANG XIAOJUAN SUN DABING LI School of Management Science and Information Engineering Jilin University of Finance and EconomicsChangchun 130117China Key Laboratory of Luminescence Science and Technology Chinese Academy of Sciences&State Key Laboratory of Luminescence and ApplicationsChangchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China State Key Laboratory of Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012China

Two-dimensional(2D)graphene has emerged as an excellent partner for solving the scarcity of ultraviolet photodetectors based on three-dimensional(3D)AlGaN,in which the design of a 2D graphene/3D AlGaN junction becomes *** study investigates the response mechanisms of two distinct graphene/AlGaN(Gr-AlGaN)photodetectors in the lateral and vertical *** the lateral Gr-AlGaN photodetector,photogenerated electrons drifting into p-type graphene channel induce negative photoconductivity and a persistent photoconductive effect,resulting in a high responsivity of 1.27×10^(4) A∕W and detectivity of 3.88×10^(12) *** the response capability of a vertical Gr-AlGaN device is inferior to the lateral one,it shows significantly reduced dark current and self-powered *** photogenerated electron-hole pair can be spontaneously separated by the junction electric field and generate a photocurrent at zero ***,the vertical Gr-AlGaN photodetector array is satisfied for passive driving imaging like deep space ***,the exceptional response of the lateral Gr-AlGaN device emphasizes its prospects for steady object recognition with low-light ***,the improved imaging sharpness with light illumination duration makes it suitable for biomimetic visual learning,which follows a recognition to memory *** study elucidates an efficient approach for diverse photodetection applications through the configuration design of Gr-AlGaN junctions.

关键词： AlGaN ultraviolet Configuration

Suppression of gastric cancer growth by adenovirus-mediated transfer of the PTEN gene

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World Journal of Gastroenterology 2005年第15期11卷 2224-2229页

作者： YingHang Yong-ChenZheng YanCao Qing-shanli Yu-JieSui CentralLaboratory TheSecondHospitalofJilinUniversityChuangchun130041JilinProvinceChina DepartmentofBiochemistryandMolecularBiology LifeScienceSchoolofJilinUniversityChuangchun130021JilinProvinceChina

AIM: To investigate the tumor-suppressive effect of the phosphatase and tensin homologue deleted from chromosome (PTEN) in human gastric cancer cells th atwere wild type for ***: Adenoviruses expressing PTEN or luciferase as a control were introduced into gastric cancer *** effect of exogenous PTEN gene on the growth and apoptosis of gastric cancer cells that are wtPTEN were examined in vitro and in ***: Adenovirus-mediated transfer of PTEN (AdPTEN) suppressed cell growth and induced apoptosis significantly in gastric cancer cells (MGC-803, SGC-7901)carrying wtPTEN in comparison with that in normal gastric epithelial cells (GES-1) carrying wtPTEN. This suppression was induced through downregulation of the Akt/PKB pathway, dephosphorylation of focal adhesion kinase and mitogen-activated protein kinase and cell-cycle arrest at the G2/M phase but not at the G1 phase. Furthermore,treatment of human gastric tumor xenografts (MGC-803,SGC-7901) with Ad-PTEN resulted in a significant (P＜0.01)suppression of tumor ***: These results indicate a significant tumorsuppressive effect of Ad-PTEN against human gastric cancer cells. Thus, Ad-PTEN may be used as a potential therapeutic strategy for treatment of gastric cancers.

关键词： PTEN Gastric cancer

Polarization-enhanced AlGaN solar-blind ultraviolet detectors

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Photonics Research 2020年第7期8卷 1243-1252页

作者： Ke Jiang Xiaojuan Sun Zi-Hui Zhang Jianwei Ben Jiamang Che Zhiming Shi Yuping Jia yang Chen shanli Zhang Wei Lv Dabing Li State Key Laboratory of Luminescence and Applications Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of SciencesChangchun 130033China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Key Laboratory of Electronic Materials and Devices of Tianjin School of Electronics and Information EngineeringHebei University of TechnologyTianjin 300401China Key Laboratory of Advanced Structural Materials Ministry of EducationChangchun University of TechnologyChangchun 130012China College of Materials Science and Engineering Shenzhen UniversityShenzhen 518071China

AlGaN solar-blind ultraviolet detectors have great potential in many fields,although their performance has not fully meet the requirements until ***,we proposed an approach to utilize the inherent polarization effect of AlGaN to improve the detector *** heterostructures were designed to enhance the polarization field in the absorption layer,and a high built-in field and a high electron mobility conduction channel were *** a result,a high-performance solar-blind ultraviolet detector with a peak responsivity of 1.42 A/W at 10 V was achieved,being 50 times higher than that of the nonpolarization-enhanced ***,an electron reservoir structure was proposed to further improve the performance.A higher peak responsivity of 3.1 A/W at30 V was achieved because the electron reservoir structure could modulate the electron concentration in the conduction *** investigation presented here provided feasible approaches to improve the performance of the AlGaN detector by taking advantage of its inherent property.

关键词： polarization AlGaN ultraviolet

Construction of a regulable gene therapy vector targeting for hepatocellular carcinoma

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World Journal of Gastroenterology 2003年第4期9卷 688-691页

作者： Shao-YingLu Yan-FangSui Zeng-shanli Cheng-EnPan JingYe Wen-YongWang DepartmentofGeneralSurgery FirstHospitalofXi'anJiaotongUniversityXi'an710061ShaanxiProvinceChina DepartmentofPathology FourthMilitaryMedicalUniversityXi'an710032ShaanxiProvinceChina DepartmentofGeneralSurgery FirstHospitalofXi'anJiaotongUniversityXi'an710061ShaanxiProvinceChina

AIM: To construct a gene modified hepatocellular carcinoma (HCC) specific EGFP expression vector regulated by abbreviated cis-acting element of AFP ***: The minimal essential DNA segments of AFP gene enhancer and promoter were synthesized through PCR from Genome DNA of HepG2 cells. Gene fragments were then cloned into the multiple cloning site of non-promoter EGFP vector pEGFP-t. Recombinant plasmid was transferred into positive or negative AFP cell lines by means of lipofectamine. The expression of EGFP was tested by fluorescence microscope and flow cytometry. The effect of all-trans retinoic acid (ATRA) on the expression of EGFP was tested in different ***: By the methods of restriction digestion and sequence analyses we confirmed that the length, position and orientation of inserted genes of cis-acting element of AFP were all correct. The transcription of EGFP was under the control of AFP cis-acting element. The expressing EGFP can only been detected in AFP producing hepatoma *** expression rate of EGFP in G418 screened cell line was 34.9±4.1%. 48 h after adding 1×10-7M retinoic acid, EGFP expression rate was 14.7±3.5%. The activity of AFP gene promoter was significantly suppressed by addition of 1×10-7M retinoic acid (P＜0.05, P=0.003, t=6.488).CONCLUSION: This recombinant expression vector can be used as a gene therapy vector for HCC. The expression of tumor killing gene will be confined within the site of tumor and the activity of which can be regulated by retinoic acid.

关键词：肝细胞癌可控基因疗法载体聚合酶链反应 DNA扩增