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Epitaxial Growth of High Quality Diamond Film on the Cubic Boron Nitride Surface by Chemical Vapor Deposition

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Chinese Physics Letters 1996年第10期13卷 779-781页

作者： GAO Chun-xiao ZHANG Tie-chen ZOU Guang-tian jin zeng-sun YANG Jie National Laboratory of Superhard Materials Jilin UniversityChangchun 130023 Laboratory of Changchun Flying School Changchun 130012

High quality diamond epitaxial film has been obtained on high pressure synthesized cubic boron nitride crystal surface by dc glow discharge chemical vapor deposition. The growth characteristics of the epitaxial film have been investigated by scanning electron microscope. The quality of the film has been confirmed by Raman spectroscope to be close to that of natural diamond.

关键词： deposition. film boron

Factors Influencing Thermal Conductivity in Diamond Film

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Chinese Physics Letters 1996年第9期13卷 700-702页

作者： GU Chang-zhi jin zeng-sun WANG Chun-lei LÜXian-yi ZOU Guang-tian ZHANG Ji-fa FANG Rong-chun State Key Laboratory of Superhard Materials Jilin UniversityChangchun 130023 Department of Physics University of Science and Technology of ChinaHefei 230026

Diamond films were synthesized on Si substrate by electron-assisted chemical vapor deposition method using gas mixtures of methane(or acetone)and *** crystal structures of diamond films were obtained by synthesis with various deposition *** influences of various deposition conditions on thermal conductivity of diamond film were *** results show that large-grain(100)-oriented diamond films synthesized at lower concentration of methane and acetone have higher thermal conductivity,and thermal conductivity increases with the increasing in film thickness and the removal of the Sic layer on the back of the film,at last,annealing in ambience of hydrogen is advantageous to acquiring diamond film with high thermal conductivity.

关键词： film conductivity Diamond

Effect of Surface Hydrogen Coverage on Field Emission Properties of DiamondFilms Investigated by High-Resolution Electron Energy Loss Spectroscopy

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Chinese Physics Letters 2000年第4期17卷 294-295页

作者： WANG Yu-Guang GU Chang-Zhi jin zeng-sun XIONG Yan-Yun LIN Zhang-Da FENG Ke-An State Key Laboratory of Surface Physics Institute of PhysicsChinese Academy of SciencesBeijing 100080 State Key Laboratory of Superhard Materials Jilin UniversityChangchun 130023

The influence of surface hydrogen coverage on the electron field emission of diamond films was investigated by high-resolution electron energy loss *** was found that hydrogen plasma treatment increased the surface hydrogen coverage while annealing caused hydrogen desorption and induced surface *** electron emission measurements manifested that increase of surface hydrogen coverage could improve the field emission properties,due to the decrease of electron affinity of the *** hy hvdrogen adsorption.

关键词： spectroscopy. surface Diamond

Thermal Conductivity of Diamond-Based Silicon-on-Insulator Structures

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Chinese Physics Letters 1996年第8期13卷 610-612页

作者： GU Chang-zhi jin zeng-sun LU Xiang-yi ZOU Guang-tian LU Jian-xia YAO Da ZHANG Ji-fa FANG Rong-chuan State key Laboratory of Superhard Materials Jilin UniversityChangchun 130023 Institute of Northeast Microelectron Shenyang 110032 Department of Physics University of Science and Technology of ChinaHefei 230026

Diamond films of various thickness(1-300μm)were deposited on single-crystal Si active(300μm)by a microwave plasma chemical vapor deposition method using gaseous mixtures of methane and *** thinning of the Si layer by machine and ion-beam polishing a diamond-based silicon-on-insulator structure with final Si layer thickness of about 1μm is *** conductivity of this structure material with various thicknesses of diamond and Si layer was *** with bulk silicon,the thermal conductivity of the siliconon-diamond structure with 300μm diamond and 1μm silicon increases by 850%.

关键词： Diamond conductivity structure

Effects of Alcohol Addition on the Deposition of Diamond Thick Films by dc Plasma Chemical Vapor Deposition Method

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Chinese Physics Letters 1998年第3期15卷 228-229页

作者： BAI Yi-zhen JIANG Zhi-gang WANG Chun-lei jin zeng-sun LÜXian-yi ZOU Guang-tian National Laboratory of Superhard Materials Jilin UniversityChangchun 130023

Diamond films have been deposited by dc plasma chemical vapor deposition *** addition of alcohol in the resource gas largely increases the deposition *** effects of alcohol addition on deposition rate and film quality... 详细信息

关键词： Diamond alcohol film

Optimal synthesis of heat-integrated distillation configurations using the two-column superstructure

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Chinese Journal of Chemical Engineering 2024年第2期66卷 238-249页

作者： Xiaodong Zhang Lu jin jinsheng sun School of Chemical Engineering and Technology Tianjin UniversityTianjin 300072China

In the realm of the synthesis of heat-integrated distillation configurations,the conventional approach for exploring more heat integration possibilities typically entails the splitting of a single column into a twocolumn ***,this approach frequently necessitates tedious enumeration procedures,resulting in a considerable computational *** surmount this formidable challenge,the present study introduces an innovative remedy:The proposition of a superstructure that encompasses both single-column and multiple two-column ***,a simultaneous optimization algorithm is applied to optimize both the process parameters and heat integration structures of the twocolumn *** effectiveness of this approach is demonstrated through a case study focusing on industrial organosilicon *** results underscore that the superstructure methodology not only substantially mitigates computational time compared to exhaustive enumeration but also furnishes solutions that exhibit comparable performance.

关键词： Superstructure Process synthesis Heat integration Simulation-based optimization Industrial organosilicon separation

Online control for pressure regulation of oxygen mask based on neural network

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Control Theory and Technology 2024年第3期22卷 487-501页

作者： Ligan Zhao Qinglin sun Hao sun jin Tao zengqiang Chen College of Artificial Intelligence Nankai UniversityTianjin 300350China Silo Al Helsinki 00100Finland

The aviation oxygen mask,which has a small volume of less than 1L and strong air tightness,imposes extremely high requirements on control performance of the oxygen *** on analyses of the operation principle of oxygen supply system,the dynamic model is established through the combination of mechanism analysis and experimental *** that the traditional fixed-parameter controllers are difficult to meet the control requirements with changes in pulmonary ventilation,this paper presents an online feedback controller based on neural network compensation(NNC),with connection weights that can be updated without *** mathematical simulations at different respiratory parameters,such as respiratory rate,are performed to verify the superior lower inspiratory resistance of controller with *** terms of hardware,an embedded AI control platform is to complete the experimental ***,the work may have downward compatibility to achieve stable oxygen supply in civil fields,such as medical ventilators,high-altitude expeditions.

关键词： Neural network Online control Pressure regulation AI platform

Genome sequencing provides insights into Caprifoliaceae genome evolution and the mechanism underlying second blooming phenomenon in Heptacodium miconioides

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Horticultural Plant Journal 2024年第3期10卷 897-910页

作者： Yueling Li Zhongshuai sun Zexin jin Junmin Li Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation Taizhou UniversityTaizhouZhejiang 318000China Institute of Ecology Taizhou UniversityTaizhouZhejiang 318000China School of Life Sciences Taizhou UniversityTaizhouZhejiang 318000China

Plants of the Caprifoliaceae family are widely cultivated worldwide as ornamental plants owing to their numerous,sweet-smelling,beautiful flowers and *** miconioides Rehd.,a member of the family,is endemic to eastern China and is cultivated as a popular ornamental plant in North America and European *** has a rather novel and beautiful trait of high horticultural value,that is,its sepals persist and enlarge,turning purplish ***,we report the chromosome-level genome assembly of *** to understand its evolution and floral *** 622.28 Mb assembled genome harbored a shared whole-genome duplication with a related species,Lonicera *** genomic analysis suggested that chromosome fission events following genome duplication underlie the unusual chromosome number of these two species,as well as chromosome fission of another five chromosomes in ***,giving rise to a haploid chromosome number of 14(versus 9 in ***).In addition,based on transcriptome and chloroplast genome analysis of 17 representative species in the Caprifoliaceae,we assumed that large structural variations in the chromosomes of *** were not caused by *** in the candidate genes of the MADS-box family were detected in the *** genome,including AP1-,AP3-,and SEPexpanded,which might underlie the sepal elongation and development in this *** current findings provided a critical resource for genome evolution studies in Caprifoliaceae and it was an example of how multi-omics data can elucidate the regulation of important ornamental traits.

关键词： Heptacodium miconioides Genome assembly Caprifoliaceae Chromosome fusion Sepal traits

Clean production of lactic acid by selective carbon-carbon bond cleavage of biomass feedstock over a novel carbon-bismuth oxychloride photocatalyst

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Frontiers of Chemical Science and Engineering 2024年第2期18卷 69-81页

作者： Zulfiqar Ali Jiliang Ma Dongnv jin Rui Cui Runcang sun Liaoning Key Lab of Lignocellulose Chemistry and Biomaterials Liaoning Collaborative Innovation Center for Lignocellulosic BiorefineryCollege of Light Industry and Chemical EngineeringDalian Polytechnic UniversityDalian 116034China

The use of functional materials such as carbon-bismuth oxyhalides in integrated photorefineries for the clean production of fine chemicals requires restructuring.A facile biomass-assisted solvothermal fabrication of carbon/bismuth oxychloride nanocomposites(C/BiOCl)was achieved at various *** with BiOCl and C/BiOCl-120,C/BiOCl-180 exhibited higher crystallinity,wider visible light absorption,and a faster migration/separation rate of photoinduced *** the selective C–C bond cleavage of biomass-based feedstocks photocatalyzed by C/BiOCl-180,the xylose conversion and lactic acid yield were 100%and 92.5%,respectively.C/BiOCl-180 efficiently converted different biomass-based monosaccharides to lactic acid,and the efficiency of pentoses was higher than that of ***,lactic acid synthesis was favored by all active radicals including superoxide ion(·O_(2)^(−)),holes(h^(+)),hydroxyl radical(·OH),and singlet oxygen(^(1)O_(2)),with·O_(2)^(−)playing a key *** fabricated photocatalyst was stable,economical,and *** use of biomass-derived monosaccharides for the clean production of lactic acid via the C/BiOCl-180 photocatalyst has opened new research horizons for the investigation and application of C–C bond cleavage in biomass-based feedstocks.

关键词： carbon-carbon bond cleavage biomass reforming C/BiOCl lactic acid photocatalysis