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Literature Review of the Use of Zinc and Zinc Compounds in Paper-Based Microfluidic Devices
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作者 Amer Charbaji Hojat Heidari-Bafroui +1 位作者 Constantine Anagnostopoulos Mohammad Faghri 《Journal of Minerals and Materials Characterization and Engineering》 2021年第3期257-270,共14页
Zinc and its compounds, alloys and composites play an important role in the modern day world and find application in almost every aspect that can improve the quality of our lives. This ranges from supplements and phar... Zinc and its compounds, alloys and composites play an important role in the modern day world and find application in almost every aspect that can improve the quality of our lives. This ranges from supplements and pharmaceuticals that are meant to improve our health and wellbeing to additives meant to guard or reduce corrosion in metals. However, over the past several years, a new area of technology has been garnering a great deal of attention and has made use of zinc and its compounds. This is with reference to paper-based microfluidic technology that offers several advantages and that keeps expanding in the amount of applications it covers. In this paper, a review is offered for the applications that have used zinc or zinc compounds in paper-based microfluidic devices. 展开更多
关键词 zinc zinc Oxide zinc compounds Paper-Based Devices Paper Microfluidics Low-Cost Platforms Point-of-Care Diagnostics
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Two Novel Zinc Compounds with in situ Formation of Dimethylamine Ligand
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作者 刘玺 吴阿清 郭国聪 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2008年第6期667-672,共6页
The investigation of the supramolecular interactions between the zinc chloride salts and the crown ether in tetrahydrofuran (THF) with the diffusion of in situ formed DMA (DMA = dimethylamine) ligand leads to two ... The investigation of the supramolecular interactions between the zinc chloride salts and the crown ether in tetrahydrofuran (THF) with the diffusion of in situ formed DMA (DMA = dimethylamine) ligand leads to two novel zinc-DMA compounds, [(H3O)·(18C-6)][ZnCl3(DMA)] 1 and [(HDMA)·(18C-6)][ZnCl3(DMA)] 2 (18C-6 = 18-crown-6), whose emissions fall into the blue-emission field. Crystal data for compound 1: monoclinic, space group P21/c, a = 8.753(1), b = 14.538(2), c = 19.969(3)A, β = 110.121(7)°, V = 2386.2(5)A^3, T = 293(2) K, Z = 4, Mr = 500.14, Dc= 1.392 g/cm^3,μ = 1.395 mm^-1, F(000) = 1048, S = 1.006, R = 0.0611 and wR = 0.1755 for 3676 observed reflections with I 〉 2σ(I) and 235 parameters. For 2: triclinic, space group P1^-, a = 9.2672(4), b = 11.8778(2), c = 13.3846(1) A, a = 67.09(1), β = 75.54(2), ),γ = 81.32(2)°, V = 1311.74(6) A^3, T = 293(2) K, Z = 2, Mr = 527.21, Dc = 1.335 g/cm^3,μ = 1.271 mm^-1, F(000) = 556, S = 1.006, R = 0.0393 and wR = 0.1034 for 3839 observed reflections with I〉 2σ(I). 展开更多
关键词 zinc compound in situ crystal structure blue-emission
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High Quality Zinc Sulfide Epitaxial Layers Grown by Metalorganic Chemical Vapour Deposition
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作者 Fan, Guanghan Liao, Qiwei +3 位作者 Fan, Xiwu Zhang, Zhishun Li, Mei Zhang, Jiying 《Rare Metals》 SCIE EI CAS CSCD 1989年第2期37-42,共6页
ZnS films were successfully grown by metallorganic chemical vapour deposition (MOCVD) at atmospheric pressure on (100) GaAs substrates. The deposition was carried out at a substrate temperature between 280 approximate... ZnS films were successfully grown by metallorganic chemical vapour deposition (MOCVD) at atmospheric pressure on (100) GaAs substrates. The deposition was carried out at a substrate temperature between 280 approximately 550°C with optimisation of reactor design and growth conditions. The gas phase prereaction is effectively restrained. These epilayers exhibit high crystallographic quality and reveal a mirror surface morphology. The peak halfwidths of X-ray diffraction patterns from their (400) faces are within 0.06 approximately 0.09°. The epilayers grown on (111) GaAs, (112¯0) Al2O3 and (100) Si have proven to be single crystalline feature. The optical and electrical characteristics of ZnS epilayers are measured by photoluminescence, cathodeluminescence, and the Van der Pauw method. The results indicate that there are not a large number of deep centers that could be detected both at 77K and at room temperature. A broad CL peak around 2.897eV and 2.672eV was observed only under very strong excitation. Their origin has not been examined. All epilayers present high resistivities up to 1013Ω&middotcm. 展开更多
关键词 CRYSTALS Epitaxial Growth Optical Properties Measurements ORGANOMETALLICS Chemical Vapor Deposition Semiconducting Gallium Arsenide SUBSTRATES Semiconducting zinc compounds
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Extraction of manganese and zinc from their compound ore by reductive acid leaching 被引量:4
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作者 Qian LI Xue-fei RAO +4 位作者 Bin XU Yong-bin YANG Ting LIU Tao JIANG Long HU 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2017年第5期1172-1179,共8页
Comprehensive utilization of low grade manganese?zinc compound ore containing lead and silver with a method of reductive acid leaching was studied.According to theφ?pH diagram of Mn?Zn?H2O system,Mn and Zn can be lea... Comprehensive utilization of low grade manganese?zinc compound ore containing lead and silver with a method of reductive acid leaching was studied.According to theφ?pH diagram of Mn?Zn?H2O system,Mn and Zn can be leached simultaneously in the pH range of?2to5.61.The results showed that both hydrogen peroxide and sucrose were effective reductants which could intensify the simultaneous leaching of Mn and Zn into leachate as well as enrich Pb and Ag in the residue.95.88%of Mn and99.23%of Zn were extracted when the compound ore was leached with hydrogen peroxide in sulfuric acid media,meanwhile the contents of Pb and Ag in the residue were enriched to13.21%and489.36g/t,respectively.When sucrose was used as the reductant,the leaching efficiencies of Mn and Zn separately achieved98.26%and99.62%,and contents of Pb and Ag in the residue were as high as13.92%and517.87g/t,respectively. 展开更多
关键词 manganese.zinc compound ore hydrogen peroxide SUCROSE comprehensive utilization MANGANESE zinc leaching
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Construction of a New(4,8)-Connected Coordination Polymer Based on the Zinc Cluster:Structure,Topology,and Luminescence 被引量:1
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作者 安燕燕 卢丽萍 朱苗力 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2018年第9期1479-1485,共7页
The title complex, [Zn3(L)2(H2 O)2]n(1, H3 L = 5-((3-formylphenoxy)methyl)isophthalic acid), has been synthesized under hydrothermal conditions and structurally characterized by single-crystal X-ray diffract... The title complex, [Zn3(L)2(H2 O)2]n(1, H3 L = 5-((3-formylphenoxy)methyl)isophthalic acid), has been synthesized under hydrothermal conditions and structurally characterized by single-crystal X-ray diffraction, IR spectroscopy and thermogravimetric analysis. Compound 1 exhibits a 3D binodal(4,8)-connected net based on trinuclear [Zn3(COO)4] clusters with the topology symbol of(416·612)(44·62)2. It crystallizes in monoclinic system, space group P21/c, with a = 13.548(3), b = 13.291(3), c = 8.2750(1) ?, β = 97.08(3)°, V = 1478.7(6) ?3, Z = 2, Mr = 858.6 g/mol, Dc = 1.928 mg/m3, μ = 2.49 mm-1, F(000) = 864, GOOF = 1.12, the final R = 0.0457 and wR = 0.1329 for 4334 observed reflections with I 〉 2σ(I). Additionally, the photoluminescent behaviours of 1 and H3 L have also been investigated in the solid state at room temperature. 展开更多
关键词 5-((3-formylphenoxy)methyl)isophthalic acid zinc(Ⅱ) compound crystal structure luminescent property
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A Novel Luminescent Zinc(Ⅱ) Coordination Polymer with 2D → 3D Polythreaded Motif
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作者 覃业燕 张鑫 +1 位作者 沈艺程 姚元根 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2015年第9期1399-1404,共6页
A new zinc(Ⅱ) compound, [Zn(BTA)(UCA)]n (1, HBTA = 1,2,3-benzotriazole, HUCA = 4-imidazoleacrylic acid), has been synthesized via the hydrothermal reactions of Zn(OAC)2.2H20, HBTA and HUCA. The crystal stru... A new zinc(Ⅱ) compound, [Zn(BTA)(UCA)]n (1, HBTA = 1,2,3-benzotriazole, HUCA = 4-imidazoleacrylic acid), has been synthesized via the hydrothermal reactions of Zn(OAC)2.2H20, HBTA and HUCA. The crystal structure is of monoclinic, space group P21/c with a = 7.450(3), b = 18.911 (8), c = 9.198(4) A, fl = 94.317(8)°, V = 1292.2(9) A3, C12HgNsO2Zn, Mr = 320.63, Z = 4, Dc = 1.648 g/cm3, F(000) = 648,/z = 1.909 mm-1, R= 0.0255 and wR= 0.0655 for 2104 observed reflections (I 〉 2a(/)). Single-crystal X-ray diffraction analysis revealed that compound 1 features a two-dimensional (2D) layered framework based on benzotriazole controlled dinuclear [Zn2(BTA)2] subunits. Furthermore, these 2D layers are threaded into a 3D supramolecular framework via the direction of intermolecular hydrogen bonds and π-π interactions. In addition, the thermal stability and fluorescence property of compound 1 were also investigated. 展开更多
关键词 zinc(II) compound hydrothermal reaction 2D layer LUMINESCENCE
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Crystal Structures,Luminescent Properties and Hirshfeld Surface Analyses of Zn(Ⅱ)and Cd(Ⅱ)Compounds Based on 1-(2-Carboxyl-phenyl)-3-(pyridin-2-yl)pyrazole
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作者 张力杨 卢丽萍 +2 位作者 朱苗力 冯思思 高晓丽 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2018年第3期427-436,共10页
Two compounds,[Zn2(Hcppp)2(cppp)2(H2O)2]·2 NO3·6 H2O(1) and [Cd(Hcppp)2Cl2]· 3H2O(2)(Hcppp = 1-(2-carboxyl-phenyl)-3-(pyridin-2-yl)pyrazole),are synthesized and characterized by IR,TGA... Two compounds,[Zn2(Hcppp)2(cppp)2(H2O)2]·2 NO3·6 H2O(1) and [Cd(Hcppp)2Cl2]· 3H2O(2)(Hcppp = 1-(2-carboxyl-phenyl)-3-(pyridin-2-yl)pyrazole),are synthesized and characterized by IR,TGA and X-ray single-crystal/powder diffraction.Compound 1 crystallizes in monoclinic system,space group P21/c with a = 9.894(2),b = 15.856(3),c = 20.430(4) A,β = 101.70(3)°,V = 3138.5(11) A3,Z = 2,Mr = 1457.94,Dc = 1.543 g/cm^3,F(000) = 1504,R = 0.0278 and wR = 0.0749 for 6157 observed reflections(I 〉 2σ(I)).Compound 2 crystallizes in triclinic system,space group P1 with a = 9.1424(4),b = 11.6427(5),c = 16.1345(7) A,α = 102.6430(10)°,β = 95.4530(10)°,γ = 104.0060(10)°,V = 1605.94(12) A3,Z = 2,Mr = 767.88,Dc = 1.588 g/cm^3,F(000) = 776,R = 0.0307 and wR = 0.0764 for 6275 observed reflections(I 〉 2σ(I)).Compound 1 exhibits a binuclear structure while compound 2 shows a mononuclear structure.In compound 1,two cppp-ligands display the μ2-kN,N′:k O and two Hcppp ligands show the μ1-kN,N′ coordination modes.However,two Hcppp ligands connect one Cd(Ⅱ) cation and exhibit the μ1-kN,N′ binding mode in compound 2.The compounds are both studied using Hirshfeld surface analyses and 2D fingerprint plots.The luminescent properties are also discussed. 展开更多
关键词 Hcppp zinc(Ⅱ) and cadmium(Ⅱ) compounds Hirshfeld surface luminescent properties
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Effects of Thickness on Properties of ZnO Films Grown on Si by MOCVD
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作者 沈文娟 王俊 +2 位作者 段垚 王启元 曾一平 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2005年第11期2069-2073,共5页
High quality ZnO films are successfully grown on Si(100) substrates by metal-organic chemical vapor deposition at 300℃. The effects of the thickness of the ZnO films on crystal structure, surface morphology,and opt... High quality ZnO films are successfully grown on Si(100) substrates by metal-organic chemical vapor deposition at 300℃. The effects of the thickness of the ZnO films on crystal structure, surface morphology,and optical properties are investigated using X-ray diffraction, scanning probe microscopy,and photoluminescence spectra, respectively. It is shown that the ZnO films grown on Si substrates have a highly-preferential C-axis orientation,but it is difficult to obtain the better structural and optical properties of the ZnO films with the increasing of thickness. It is maybe due to that the grain size and the growth model are changed in the growth process. 展开更多
关键词 metal-organic chemical vapor deposition X-ray diffraction zinc compound photoluminescence spectrum
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Construction and Photoluminescence Properties of Zn(Ⅱ)/Cd(Ⅱ) Complexes with 4-Amino-3,5-propyl-1,2,4-triazole Ligand 被引量:5
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作者 闫娟枝 朱苗力 +1 位作者 高增强 董宇辉 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2014年第8期1207-1214,共8页
Reaction of ZnCI2 and 4-amino-3,5-propyl-1,2,4-triazole (dpatrz) or CdC12, NaN3 and dpatrz, in aqueous solution at room temperature yields two neutral clusters: a dinuclear complex [Zn2(dpatrz)2Ch] (I) and a li... Reaction of ZnCI2 and 4-amino-3,5-propyl-1,2,4-triazole (dpatrz) or CdC12, NaN3 and dpatrz, in aqueous solution at room temperature yields two neutral clusters: a dinuclear complex [Zn2(dpatrz)2Ch] (I) and a linear trinuclear complex, [Cd3(dpatrz)4(N3)2Cl4] (II). Both complexes have been characterized by X-ray single-crystal diffraction, powder XRD, IR, elemental analysis, TG and fluorescence analysis. Complex I crystallizes in orthorhombic, space group Pbca with a = 11.865(2), b = 14.464(3), c = 15.985(3) A, V= 2743.4(9) A3, Z = 4, C16H32NsCI4Zn2, Mr = 609.4, Dc = 1.475 g.cm3, p = 2.16 mm-1, F(000) = 1248, GOOF = 1.091, the final R = 0.0295 and wR = 0.0665 for 1999 observed reflections (I 〉 2a(/)). Complex Ⅱcrystallizes in monoclinic, space group P2/c with a = 11.408(2), b = 15.211(3), c = 18.152(6) A, fl = 123.75(2)°, V = 2619.1(1) A3, Z = 2, C32H64N22ClaCd3, Mr = 1236.05, Dc = 1.567 g.cm3, p = 1.46 mm-1, F(000) = 1244, GOOF = 1.042, the final R = 0.0444 and wR = 0.0913 for 3466 observed reflections (I 〉 2a(/)). The analysis of X-ray revealed that both structures lie about the inversion centers: complex I adopts two pl,2-triazole bridges linking two Zn(II) ions and II forms a linear trinuclear structure with four μ1,2-triazoles and two/μIA-N3 bridging modes. There are different coordinated geometries for three Cd(II) ions in Ⅱ: one is coordinated with an octahedral environment, and the other two are distorted tetragonal pyramids (r = 0.34). The hydrogen bonds of C-H...C1 and N-H...C1 lead to the discretes into a 3D supramolecular network in both compounds. The thermal stabilities and photoluminescence behaviors of them were also studied. 展开更多
关键词 triazole ring dinuclear zinc compound trinuclear cadmium compound synthesis crystal structure PHOTOLUMINESCENCE
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Organic Carboxylate Ligand Tuned Topological Variations in Three Zn(Ⅱ)Coordination Polymers:Syntheses,Crystal Structures and Photoluminescent Properties 被引量:4
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作者 柳长庆 杨锦霞 +2 位作者 张鑫 覃业燕 姚元根 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2018年第9期1470-1478,共9页
Three new Zn(Ⅱ) coordination polymers, namely [Zn2(suc)2(bib)2]n·nH2 O(1), [Zn(glu)(bib)]n·4 nH2 O(2), and [Zn(adp)(bib)]n(3)(bib = 1,4-bis(N-imidazolyl)butane, H2 suc = succinic acid... Three new Zn(Ⅱ) coordination polymers, namely [Zn2(suc)2(bib)2]n·nH2 O(1), [Zn(glu)(bib)]n·4 nH2 O(2), and [Zn(adp)(bib)]n(3)(bib = 1,4-bis(N-imidazolyl)butane, H2 suc = succinic acid, H2 glu = glutaric acid, H2 adp = adipic acid) have been hydrothermally synthesized and structurally characterized. Compound 1 features a 3D framework with 4-connected hxg-d topological network, compound 2 is comprised of 2D 44-sql-type sheets, and the adjacent 2D sheets are further packed into a 3D supramolecular architecture via intermolecular hydrogenbonding interactions, and compound 3 is a 3D framework with 4-fold interpenetrating dia topology. The structural comparison of these three compounds demonstrates that the topological variations can be well controlled by employing aliphatic dicarboxylate ligands with different spacer lengths. Moreover, the thermal stabilities and photoluminescent properties of them were also studied in detail. 展开更多
关键词 zinc(Ⅱ) compound aliphatic dicarboxylate ligands hydrothermal reaction meso-helix hydrogen bond photoluminescence
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Synthesis and Crystal Structure of a New Zn(Ⅱ) Coordination Polymer Constructed by 1,2,4,5-Benzenetetracarboxylate 被引量:3
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作者 陈顺玉 杨娥 张健 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2013年第1期149-153,共5页
A new Zn(Ⅱ) coordination polymer [Zn3(btec)(OH)2(H2O)2]n (1, btec = 1,2,4,5- benzenetetracarboxylate) has been synthesized by hydrothermal reaction and its structure was determined by single-crystal X-ray d... A new Zn(Ⅱ) coordination polymer [Zn3(btec)(OH)2(H2O)2]n (1, btec = 1,2,4,5- benzenetetracarboxylate) has been synthesized by hydrothermal reaction and its structure was determined by single-crystal X-ray diffraction analysis. The title compound crystallizes in mono- clinic, space group C2/c, with a = 19.580(3), b = 5.0137(8), c = 15.975(3), β = 121.629(2)°, V = 1335.3(4)3, C10H8O12Zn3, Mr = 516.27, Z = 4, Dc = 2.568g/cm3, μ = 5.419 mm-1, F(000) = 1016, R = 0.0590 and Rw = 0.1279 for 1110 observed reflections (I 2σ(I)). X-ray analysis shows that the asymmetric unit of the title compound contains two crystallographically unique Zn(Ⅱ) atoms which are connected through the bridging carboxylate oxygen atoms of the btec ligands and μ2-bridging oxygen atoms of water molecules to generate an infinite one-dimensional chain. The adjacent chains are linked together through the benzene rings of the btec ligands to form a two-dimensional polymeric network. The adjacent two-dimensional layers are further connected together by the benzene rings of btec ligands to give the final three-dimensional structure. The benzene rings act as pillars between two layers. 展开更多
关键词 zinc(Ⅱ) compound pyromellitic acid synthesis crystal structure
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Synthesis, Crystal Structure, Luminescence Property and DFT Calculations of a New Coordination Compound Containing 8-Aminoquinoline Ligand 被引量:1
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作者 徐衡 刘光祥 +2 位作者 黄荣谊 赵顺平 孔学军 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2013年第4期545-549,共5页
A new luminescent compound, Zn(8-aminoql)2(SCN)2 (1, 8-aminoql = 8-amino quinoline), has been synthesized and its structure was characterized by IR, elemental analysis and X-ray single-crystal diffraction. Compo... A new luminescent compound, Zn(8-aminoql)2(SCN)2 (1, 8-aminoql = 8-amino quinoline), has been synthesized and its structure was characterized by IR, elemental analysis and X-ray single-crystal diffraction. Compound 1 belongs to the orthorhombic system, space group Pbca with a = 8.503(2), b = 14.427(4), c = 31.922(8)A, V= 3916.0(18) A3, Z = 8, C20H16N6S2Zn, Mr = 469.88, Dc = 1.594 Mg/m3, μ = 1.488 mm-1, F(000) = 1920, T = 296(2) K, the final R = 0.0293 and wR = 0.0645 for all 2763 observed reflections (1 〉 2a(/)). Compound 1 displays a 3D supramolecular architecture formed by N-H--S hydrogen bonds and π...π aromatic packing interactions. Photoluminescence studies reveal that it displays obvious fluorescent emission band (λex = 320 nm) at 533 nm in the solid state at room temperature. The emission bands possess a broad asymmetric feature, which can be assigned to ligand-to-ligand charge transfer transitions based on DFT calculations. 展开更多
关键词 zinc compound crystal structure PHOTOLUMINESCENCE DFT
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Three Novel Luminescent Zinc(Ⅱ)Compounds Constructed by Employing Mixed-ligand Strategy
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作者 ZHU Kun YANG Jin-Xia +1 位作者 QIN Ye-Yan YAO Yuan-Gen 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2021年第9期1152-1160,1108,共10页
Three novel coordination polymers,[Zn(suc)(o-bix)]_(n)(1),[Zn(suc)(m-bix)·H_(2)O]_(n)(2)and[Zn_(2)(suc)_(2)(p-bix)_(2)·4H_(2)O]_(n)(3)(H_(2)suc=succinic acid,o-bix=1,2-bis(imidazol-1-ylmethyl)-benzene,m-bix=... Three novel coordination polymers,[Zn(suc)(o-bix)]_(n)(1),[Zn(suc)(m-bix)·H_(2)O]_(n)(2)and[Zn_(2)(suc)_(2)(p-bix)_(2)·4H_(2)O]_(n)(3)(H_(2)suc=succinic acid,o-bix=1,2-bis(imidazol-1-ylmethyl)-benzene,m-bix=1,3-bis(imidazol-1-ylmethyl)-benzene,p-bix=1,4-bis(imidazol-1-ylmethyl)-benzene),have been synthesized and structurally characterized by elemental analysis,IR spectroscopy,thermogravimetric analysis,powder X-ray diffraction,and single-crystal X-ray diffraction.These three coordination polymers present various structures originated from auxiliary N-donor ligands with different configurations.Compound 1 shows a 2D network with 4^(4)-sql topology.Compound 2 exhibits an infinite chain,and the adjacent chains are extended into a 2D sheet by π-πstacking interactions.Changing the conformation of the N-donor ligand leads to 3 featuring a 3D framework with a novel 4-connected(6^(5)·8)topology.In addition,the solid-state photoluminescent properties of compounds 1~3 are investigated. 展开更多
关键词 zinc(Ⅱ)compounds hydrothermal reaction aliphatic dicarboxylates mix-ligand luminescence
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Dissolution of different zinc salts and Zn uptake by Sedum alfredii and maize in mono-and co-cropping under hydroponic culture 被引量:3
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作者 Cheng'ai Jiang Qitang Wu +3 位作者 Shucai Zeng Xian Chen Zebin Wei Xinxian Long 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2013年第9期1890-1896,共7页
Previous soil pot and field experiments demonstrated that co-cropping the hyperaccumulator Sedum alfredii with maize increased Zn phytoextraction by S. alfredii and decreased Zn uptake by maize shoots. This hydroponic... Previous soil pot and field experiments demonstrated that co-cropping the hyperaccumulator Sedum alfredii with maize increased Zn phytoextraction by S. alfredii and decreased Zn uptake by maize shoots. This hydroponic experiment was conducted to investigate whether the facilitation of Zn phytoextraction by S. alfredii resulted from improved dissolution in this co-cropping system and its relation to root exudates. S. alfredii and maize were mono-and co-cropped (without a root barrier) in nutrient solution spiked with four Zn compounds, ZnS, ZnO, Zn3(PO4)2 and 5ZnO·2CO3·4H2O (represented as ZnCO3 ) at 1000 mg/L Zn for 15 days without renewal of nutrient solution after pre-culture. The root exudates were collected under incomplete sterilization and analyzed. The results indicated that the difference in Zn salts had a greater influence on the Zn concentration in maize than for S. alfredii, varying from 210-2603 mg/kg for maize shoots and 6445-12476 mg/kg for S. alfredii in the same order: ZnCO3 〉 ZnO 〉Zn3(PO4)2 〉 ZnS. For the four kinds of Zn sources in this experiment, co-cropping with maize did not improve Zn phytoextraction by S. alfredii. In most cases, compared to co-cropped and mono-cropped maize, mono-cropped S. alfredii resulted in the highest Zn2+ concentration in the remaining nutrient solution, and also had a higher total concentration of low molecular weight organic acids (LMWOA) and lower pH of root exudation. Root exudates did partly influence Zn hyperaccumulation in S. alfredii. 展开更多
关键词 zinc compounds DISSOLUTION co-cropping root exudates HYDROPONIC
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Influence of reaction temperature on the formation process of ZnO quantum dots and the optical properties 被引量:2
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作者 庄晋艳 李岚 +2 位作者 张晓松 徐建萍 魏军 《Optoelectronics Letters》 EI 2009年第1期1-5,共5页
ZnO quantum dots (QDs)with the sizes of 3.0-5.6 nm are synthesized by solution-phase method at different temperatures. We find that temperature has great influence on the size of ZnO QDs. The growth process is the mos... ZnO quantum dots (QDs)with the sizes of 3.0-5.6 nm are synthesized by solution-phase method at different temperatures. We find that temperature has great influence on the size of ZnO QDs. The growth process is the most sensitive to temperature, and the process is well explained by Lifshitz–Slyozov–Wagner (LSW) model. By photoluminescence (PL) spectra of the quantum dots at different temperatures and reactive time, we come to a conclusion that ultraviolet emission is mainly due to surface defects, and the or... 展开更多
关键词 Electron mobility Emission spectroscopy Optical properties Semiconducting zinc compounds Surface defects zinc oxide
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Dielectrophoretic assembly of ZnO nanowires
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作者 赵茂聪 胡国华 +4 位作者 周昊 郑科 朱光平 崔一平 徐春祥 《Chinese Optics Letters》 SCIE EI CAS CSCD 2009年第3期235-237,共3页
The synthesis of zinc oxide (ZnO) nanowires is achieved by vapor phase transportation (VPT) method. The designed quartz tube, whose both ends are narrow and the middle is wider, is used to control the growth of Zn... The synthesis of zinc oxide (ZnO) nanowires is achieved by vapor phase transportation (VPT) method. The designed quartz tube, whose both ends are narrow and the middle is wider, is used to control the growth of ZnO nanowires. Dielectrophoresis (DEP) method is employed to align and manipulate ZnO nanowires which are ultrasonic dispersed and suspended in ethanol solution. Under the dielectrophoretic force, the nanowires are trapped on the pre-patterned electrodes, and further aligned along the electric field and bridge the electrode gap. The dependence of the alignment yield on the applied voltage and frequency is investigated. 展开更多
关键词 Dielectric devices Electric fields ELECTROPHORESIS ETHANOL NANOWIRES Oxide minerals QUARTZ Semiconducting zinc compounds zinc zinc oxide
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Third-order optical nonlinearities of Zn_(1-x)Mg_xO thin films
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作者 陈乃波 吴惠桢 +2 位作者 徐天宁 余萍 邱东江 《Chinese Optics Letters》 SCIE EI CAS CSCD 2005年第10期611-614,共4页
The Zn1-xMgxO thin films were deposited on sapphire substrates by reactive electron beam evaporation deposition (REBED). The X-ray diffraction (XRD) measurement demonstrates that these films undergo phase transiti... The Zn1-xMgxO thin films were deposited on sapphire substrates by reactive electron beam evaporation deposition (REBED). The X-ray diffraction (XRD) measurement demonstrates that these films undergo phase transition from hexagonal to cubic with increasing the Mg concentration. Absorption coefficients at 532 nm of the samples were obtained from the absorption spectra. Using optical Kerr effect, the thirdorder susceptibilities of the ternary films over a wide range of Mg concentrations were determined. The magnitude of X^(3) of the ternary Zn1-xMgxO films is order of 10^-11 esu at λ = 532 nm. The sample with phase mixture of both hexagonal and cubic structures shows the largest third-order susceptibility. The difference observed in the magnitude of X^(3) of Zn1-xMgxO films is attributed to the different microstructures of the ternary films, such as crystalline phase separation and crystal grains that enhance stimulated scattering. 展开更多
关键词 ABSORPTION Concentration (process) Control nonlinearities Crystalline materials Measurements Microstructure Optical Kerr effect Phase transitions SAPPHIRE zinc compounds
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ZnCl_2-assisted Synthesis of ZnSe Polycrystal
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作者 Changyou Liu Tao Wang +2 位作者 Gangqiang Zha Zhi Gu Wanqi Jie 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2012年第4期373-378,共6页
A chemical-assisted element direct-reaction method is developed to synthesize ZnSe compound semiconductor material at a relatively low temperature (-1000 ℃). ZnSe polycrystal was obtained in the closed-tube systems... A chemical-assisted element direct-reaction method is developed to synthesize ZnSe compound semiconductor material at a relatively low temperature (-1000 ℃). ZnSe polycrystal was obtained in the closed-tube systems with Zn-Se, Zn-Se-Zn(NHa)2CI2, ZnoSe-NH4CI and Zn-Se-ZnCI2. The as-synthesized samples were tested by X-ray diffraction (XRD), thermogravimetric analysis (TGA) and analyzed by thermodynamic numerical method. The results demonstrate that the synthesis efficiency is higher than 99.96% for Zn-Se-ZnCl2 system at around 1000 ℃ for 3 weeks. It also exhibits that not only temperature, but also low apparent ratio of volume and surface area of the source materials and higher ZnCl2 content are required to achieve high synthesis efficiency. A SeCI transporting reaction synthesis process is proposed based on the thermodynamic analysis. 展开更多
关键词 CRYSTALLITES Growth from vapor zinc compounds Semiconducting II-VI materials
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