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低维InP材料的表征和生长机理研究

发光学报 2024年第5期45卷 779-793页

作者：牛艳萍马淑芳董浩琰阳智郝晓东韩斌吴胜利董海亮许并社陕西科技大学西安市化合物半导体材料与器件重点实验室陕西西安710021 西安交通大学第一附属医院肝胆外科陕西西安710061 太原理工大学教育部先进材料界面科学与工程重点实验室山西太原030024 山西浙大新材料与化工研究院山西太原030024

磷化铟作为一种重要的Ⅲ-Ⅴ半导体材料,由于其独特的光学和电学特性,近年来备受关注。大量的研究表明,它在光电子、催化、医学等领域具有潜在的应用前景。但目前在低维InP纳米材料的可控制备和大规模合成研究中还存在一些问题有待解决... 详细信息

磷化铟作为一种重要的Ⅲ-Ⅴ半导体材料,由于其独特的光学和电学特性,近年来备受关注。大量的研究表明,它在光电子、催化、医学等领域具有潜在的应用前景。但目前在低维InP纳米材料的可控制备和大规模合成研究中还存在一些问题有待解决。针对上述问题,采用化学气相沉积法(CVD)在Si/SiO_(2)衬底上成功地制备了大量高质量的InP纳米线,并用原位生长法在多晶InP衬底上生长了大量的InP纳米柱。利用扫描电子显微镜(SEM)观察所制备的纳米材料的形貌,纳米线表面光滑,直径在30~65 nm之间,纳米线组成的薄膜厚度约为35μm;纳米柱直径分布为550~850 nm,纳米柱组成的薄膜厚度约为12μm。利用能量色散谱(EDS)和X射线光电子能谱(XPS)分析了所制备的纳米材料的成分为InP。用拉曼光谱法测定了纳米材料的化学结构,并做了进一步的分析。透射电子显微镜(TEM)用于观察纳米材料的微观结构。研究发现,本研究制备的纳米线具有很高的结晶度,沿着[111]方向生长。使用选区电子衍射(SAED)分析纳米线晶体特性时发现了清晰的衍射点,表明其为单晶结构。使用光致发光光谱仪(PL)分析其发光特性,并进一步分析。最后,我们讨论了纳米线和纳米柱的形成机制,纳米线的生长遵循气-液-固(VLS)机制,纳米柱的生长遵循固-液-固(SLS)机制。这些研究为控制InP纳米材料的制备和大规模生产提供了更多可能性。

关键词：磷化铟纳米线纳米柱材料特性生长机制

微纳级GaN基VCSEL中周期反射结构与电子阻挡层的设置作用分析

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人工晶体学报 2024年第8期53卷 1337-1343页

作者：祝震宇贾志刚董海亮许并社太原理工大学新材料界面科学与工程教育部重点实验室太原030024 山西浙大新材料与化工研究院太原030024 陕西科技大学材料原子·分子科学研究所西安710021

氮化镓(GaN)基微纳米结构生长技术的成熟为微纳级GaN基垂直腔面发射激光器(VCSEL)的制备提供了新的途径。本文设计了基于GaN基轴向异质结微纳米柱的微纳级VCSEL结构,采用Al_(0.8)Ga_(0.2)N/In_(0.2)Ga_(0.8)N应变补偿结构作为上下分布... 详细信息

氮化镓(GaN)基微纳米结构生长技术的成熟为微纳级GaN基垂直腔面发射激光器(VCSEL)的制备提供了新的途径。本文设计了基于GaN基轴向异质结微纳米柱的微纳级VCSEL结构,采用Al_(0.8)Ga_(0.2)N/In_(0.2)Ga_(0.8)N应变补偿结构作为上下分布式布拉格反射镜(DBR),其中Al_(0.8)Ga_(0.2)N层的Al组分远高于传统结构中的电子阻挡层(EBL),能够更好地起到电子阻挡的作用。本文使用商用软件PICS3D构建了电子阻挡层处于不同位置的VCSEL数理模型,并进行数值模拟计算,探索和分析物理机理,解释了不同位置EBL对空穴注入效率的影响。结果表明,采用Al_(0.8)Ga_(0.2)N与In_(0.2)Ga_(0.8)N组成的应变补偿DBR可以更好地提高空穴注入效率,优化器件光电性能。

关键词： Ⅲ族氮化物垂直腔面发射激光器空穴注入效率微纳米结构应变补偿DBR 电子阻挡层

一种Y型噻吨酮-咔唑分子的设计、合成及其蓝光和黄光有机发光二极管应用

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有机化学 2024年第4期44卷 1210-1217页

作者：孙静樊志杰杜纪宽李硕苗艳勤赵波董海亮王华太原理工大学新材料界面科学与工程教育部重点实验室太原030024 山西浙大新材料与化工研究院太原030024

采用噻吨酮作为受体,9,9'-(1,3-苯基)二-9H-咔唑作为给体,设计合成了一种Y型分子,命名为TX-Ph2Cz.化合物在稀释的溶液中展示了位于420 nm处的蓝光发射,且其发射峰在不同极性的溶剂中基本不变.在四氢呋喃/水的混合溶剂中,随着含水量的增... 详细信息

采用噻吨酮作为受体,9,9'-(1,3-苯基)二-9H-咔唑作为给体,设计合成了一种Y型分子,命名为TX-Ph2Cz.化合物在稀释的溶液中展示了位于420 nm处的蓝光发射,且其发射峰在不同极性的溶剂中基本不变.在四氢呋喃/水的混合溶剂中,随着含水量的增加发射峰红移了36 nm.从其单晶结构中可以看出化合物具有很多分子间相互作用,分子间的π…π作用有助于实现分子间的电荷转移.化合物TX-Ph2Cz在掺杂器件(质量分数3%)中展示了位于440 nm的蓝光峰,而在非掺杂器件中则展示了位于540 nm处的黄光峰,这是因为在薄膜中化合物自身形成了电致激基缔合物.同时,非掺杂器件展示了更好的电致发光性能,最大电流效率和最大外量子效率分别达到4.91 cd/A和2.64%.

关键词：有机发光二极管(OLED) 噻吨酮-咔唑 Y型结构激基缔合物

A comprehensive census of lake microbial diversity on a global scale

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Science China(Life Sciences) 2019年第10期62卷 1320-1331页

作者： Jian Yang Hongchen Jiang hailiang dong Yongqin Liu State Key Laboratory of Biogeology and Environmental Geology China University of GeosciencesWuhan 430074China State Key Laboratory of Biogeology and Environmental Geology China University of GeosciencesBeijing 100083China Department of Geology and Environmental Earth Science Miami UniversityOxfordOhio 45056USA Institute of Tibetan Plateau Research Chinese Academy of SciencesBeijing 100101China

Despite recent interest in microbial diversity and community structure of lakes across various spatial scales, a global biogeographic distribution pattern and its controlling factors have not been fully disclosed. Here, we compiled and analyzed 88,334,735 environmental 16S rRNA sequences from 431 lakes across a wide range of geographical distance and environmental conditions(in particular, salinity, 0–373.3 gL^–1). Our results showed that lake sediments inhabit significantly(ANOVA: P<0.001) more diverse microbial communities than lake waters. Non-metric dimensional scaling(NMDS) ordinations indicated that microbial community compositions differed distinctly among sample types(freshwater vs. saline, water vs. sediment) and geographic locations. Mantel and partial Mantel tests showed that microbial community composition in lake water was significantly(P=0.001) correlated with geographic distance, salinity, and pH. Statistical analyses based on neutral community and null models indicated that stochastic processes may play predominant roles in shaping the microbial biogeographic distribution patterns in the studied global lake waters. The dispersal-related stochasticity(e.g., homogenizing dispersal) exhibited a stronger influence on the distribution of microbial community in freshwater lakes than in saline lakes. Overall, this work expands our understanding of the impact of geographic distance, environmental conditions, and stochastic processes on microbial distribution in global lakes.

关键词： microbial biogeography lakes geographic distance environmental factors stochastic processes

无机纳米颗粒及界面层协同改善倍增型近红外有机光电探测器性能

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发光学报 2024年第6期45卷 986-995页

作者：常铭茹石林林滑羽璐冀婷李国辉许并社董海亮崔艳霞太原理工大学电子信息与光学工程学院山西太原030024 太原理工大学新材料界面科学与工程教育部重点实验室山西太原030024 太原理工大学物理学院山西太原030024

近红外有机光电探测器具有低成本、可溶液旋涂、生物兼容性好和柔性可穿戴等优势,在生物传感、医学成像、柔性可穿戴电子器件等领域有广泛的应用前景。倍增型有机光电探测器相比于二极管型有机光电探测器,因其具有更高的外量子效率(EQE>... 详细信息

近红外有机光电探测器具有低成本、可溶液旋涂、生物兼容性好和柔性可穿戴等优势,在生物传感、医学成像、柔性可穿戴电子器件等领域有广泛的应用前景。倍增型有机光电探测器相比于二极管型有机光电探测器,因其具有更高的外量子效率(EQE>100%)和灵敏度而备受关注。该类器件利用电极附近被载流子陷阱捕获的一种载流子能辅助另一种极性相反的载流子从外电路隧穿注入到活性层中,实现光电倍增,但陷阱的数量在一定程度上会影响器件性能的进一步提升。本文通过在活性层中掺入无机ZnO纳米颗粒来增加电子陷阱数量,使得器件在反向偏压保持暗电流密度的前提下,亮电流密度得到提高。通过优化,发现当ZnO纳米颗粒掺杂比例为5%时性能最优,在850 nm LED照射、-15 V偏压下,与未掺杂ZnO纳米颗粒器件相比,亮电流密度提升了7.4倍。在此基础上,本文协同Al_(2)O_(3)界面修饰层,进一步改善器件性能。结果表明,Al_(2)O_(3)界面修饰层的插入可改善器件的阳极界面接触特性,使得器件在正向和反向偏压下都能够实现光响应。Al_(2)O_(3)修饰后的器件在15 V偏压、全光谱范围内,EQE最高可达10^(5)%,R最高达10^(4) A/W。本工作为高灵敏度有机光电探测器的发展提供了新的思路和方法。

关键词：近红外光电倍增有机光电探测器无机纳米颗粒界面修饰

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Iron and lead ion adsorption by microbial flocculants in synthetic wastewater and their related carbonate formation

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Journal of Environmental Sciences 2013年第12期25卷 2422-2428页

作者： Minjie Yao Bin Lian hailiang dong Jianchao Hao Congqiang Liu State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of Sciences Key Laboratory of Environmental and Applied Microbiology Chengdu Institute of BiologyChinese Academy of Sciences Jiangsu Key Laboratory for Microbes and Functional Genomics Jiangsu Engineering and Technology Research Center for MicrobiologyCollege of Life ScienceNanjing Normal University State Key Laboratory of Geobiology and Environmental Geology China University of Geosciences Department of Geology and Environmental Earth Science Miami University

Although microbial treatments of heavy metal ions in wastewater have been studied, the removal of these metals through incorporation into carbonate minerals has rarely been reported. To investigate the removal of Fe^3＋ and Pb^2＋, two representative metals in wastewater, through the precipitation of carbonate minerals by a microbial flocculant （MBF） produced by Bacillus mucilaginosus. MBF was added to synthetic wastewater containing different Fe^3＋ and Pb^2＋ concentrations, and the extent of flocculation was analyzed. CO2 was bubbled into the mixture of MBF and Fe^3＋/Pb^2＋ to initiate the reaction. The solid substrates were analyzed via X-ray diffraction, transmission electron microscopy and energy dispersive spectroscopy. The results showed that the removal efficiency decreased and the MBF adsorption capacity for metals increased with increasing heavy metal concentration. In the system containing MBF, metals （Fe^3＋ and Pb^2＋）, and CO2, the concentrated metals adsorbed onto the MBF combined with the dissolved CO2, resulting in oversaturation of metal carbonate minerals to form iron carbonate and lead carbonates. These results may be used in designing a method in which microbes can be utilized to combine CO2 with wastewater heavy metals to form carbonates, with the aim of mitigating environmental problems.

关键词： Bacillus mucilaginosus microbial flocculation wastewater treatment carbon dioxide fixation mineral carbonation

Tectonomicrobiology:A new paradigm for geobiological research

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Science China Earth Sciences 2018年第4期61卷 494-498页

作者： Chuanlun ZHANG Jian LIN Sanzhong LI hailiang dong Fengping WANG Shucheng XIE Department of Ocean Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Woods Hole Oceanographic Institution Woods HoleMassachusetts 02543USA Institute of Marine Geodynamics Ocean University of ChinaQingdao 266100China State Key Laboratory of Biogeology and Environmental Geology China University ofGeosciencesBeijing 430074China Department of Geology and Environmental Earth Science Miami UniversityOxfordOhio 45056USA State Key Laboratory of Microbial Metabolism and State Key Laboratory of Ocean Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Geomicrobiology is a sub-discipline of geobiology and emphasizes the interaction between microorganisms and their environment on Earth. There is a need to explicitly emphasize the biogeochemical processes performed by microorganisms associated with Earth's tectonic activities, especially under the framework of the modern theory of plate tectonics. Tectonomicrobiology aims to create a better synergy between microbial and active tectonic processes. This explicit synergy should also foster better communications between solid Earth scientists and life scientists in terms of holistic Earth system dynamics at both tectonic and micro-scales.

关键词： Geobiology Geomicrobiology Tectonomicrobiology Tectonic activities Microbial evolution

Rapid accuracy determining DNA purity and concentration in heavy oils by spectrophotometry methods

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Petroleum Science 2023年第6期20卷 3394-3399页

作者： YunYang Wan HongMei Mu Na Luo JianPing Yang Yan Tian Ning Hong hailiang dong National Key Laboratory of Petroleum Resources and Engineering Research Centre for Geomicrobial Resources and ApplicationBeijing Key Laboratory of Petroleum Pollution and ControlUnconventional Petroleum Research InstituteChina University of PetroleumBeijing102249China Drilling and Production Engineering Technology Department of PetroChina Liaohe Oilfield Company Panjin124010LiaoningChina Center for Geomicrobiology and Biogeochemistry Research State Key Laboratory of Biology and Environmental GeologyChina University of GeosciencesBeijing100083China

DNA analysis is the core of biotechnology applied in petroleum resources and engineering. Traditionally accurate determination of DNA purity and concentration by spectrometer is the first and critical step for downstream molecular biology research. In this study, three different spectrophotometry methods, BPM, NDTT and NPMTTZ were compared for their performance in determining DNA concentration and purity in 32 oil samples, and molecule methods like quantitative real-time PCR (qPCR) and high-throughput sequence were also performed to help assess the accuracy of the three methods in determining DNA concentration and purity. For ordinary heavy oil (OHO), extra heavy oil (EHO) and super heavy oil (SHO), the characteristics of high viscosity (η), density (ρ) and resin plus asphaltene content will affect the DNA extraction and UV determination. The DNA concentration was decreased as density increased: OHO (11.46 ± 18.34 ng/μL), EHO (6.68 ± 9.67 ng/μL) and SHO (6.20 ± 7.83 ng/μL), and the DNA purity was on the reverse: OHO (1.31 ± 0.27), EHO (1.54 ± 0.20), and SHO (1.83 ± 0.32). The results suggest that spectrophotometry such as BPM and NPMTTZ are qualitatively favorite methods as the quick non-consumable methods in determining DNA concentration and purity of medium oil and heavy oil.

关键词： Heavy oil DNA concentration DNA purity Spectrophotometry qPCR

Occurrence of Highly Mature Organic Matter in Marine Black Shale Petroleum Source Rocks of Basal Cambrian from Northern Tarim Basin, China

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Chinese Journal Of Geochemistry 2004年第2期23卷 148-154页

作者：于炳松 hailiang dong 陈建强陈晓林梁世友 The Key Laboratory of Lithosphere Tectonics and Exploration of the Ministry of Education China University of Geosciences Beijing 100083 China Department of Geology Miami University Oxford OH 45056 USA

More and more evidence indicates that organic matter (OM) in immature organic-rich sediments and sedimentary rocks is chemically adsorbed onto the outer surfaces of minerals and into interlayer (inner) surfaces of smectitic clay minerals in the form of amorphous molecular-scale carbon. But there have been few reports about the occurrence of highly mature OM in marine black shales (petroleum source rocks). The occurrence of highly mature OM in the black shales of basal Cambrian from northern Tarim Basin is studied in this paper. Based on the comprehensive analyses of total organic carbon contents (TOC), maximum thermolysis temperatures (T-max) of OM, mineral surface areas (MSA), and scanning electronic microscopic (SEM) and transmission electronic microscopic (TEM) observations of the black shales, it is concluded that the highly mature OM in the marine black shales of the basal Cambrian from northern Tarim Basin occurs in particulates ranging in size from 1 to 5 μm in diameter. Through the contrast of the occurrence of the highly mature OM in the black shales with that of the immature ones in modern marine continental margin sediments, some scientific problems are proposed, which are worth to study further in detail.

关键词：寒武纪地层学塔里木盆地沉积学岩石学