electronic properties of metal organic interfaces

... Recently, metal-organic frameworks (MOFs) have emerged as a new class of hybrid crystalline porous materials [ 2, 3] MOFs are composed of two main building blocks, the metal cluster and the organic ... of the structure of three isoreticular metal-organic frameworks (IR- MOFs) on their adsorption behavior by using IGC technique to eval- uate different thermodynamic parameters of adsorption of ... mixture of the MOF and competes with the organic linker on the binding sites within the Zr cluster, favoring thus the cre- ation of defects ( Fig.1) [42] Despite the great potential of these Zr- MOFs

Ngày tải lên: 25/12/2022, 02:51

... sites, regeneration and reuse of mesoporous carbon, extend the scope of application of materials for treatment of toxic organic substances in water New findings of the thesis For the first time, ... ADSORPTION PROPERTIES OF TOXIC ORGANIC SUBSTANCES IN THE WATER ENVIRONMENT OF MESOPOROUS CARBON MATERIALS Major: Theoretical Chemistry and Physical Chemistry Code : 62.44.01.19 SUMMARY OF CHEMISTRY ... of the thesis; List of publications; References and appendices CHAPTER OVERVIEW Chapter includes a general introduction of synthesis methods, application of mesoporous carbon materials and metal

Ngày tải lên: 09/01/2020, 15:17

... loss of 7.6 %), and the final loss of 54.4 % starting at 300 °C was attributed to the decomposition of the metal-organic structure (theoretical loss of 48.3 %) Meanwhile, the TG curve of ST–MOF–199 ... Keywords: MOF–199, comparative, microwave, solvothermal 1 Introduction Metal-organic frameworks (MOFs) are crystalline porous solids composed of a three-dimensional (3D) network of metal ions ... synthesis of MOFs as well [18, 19] Despite these facts, only a few reports on the use of microwave synthesis of MOF–199 have been published [13] In the present paper, we carried out the synthesis of

Ngày tải lên: 12/01/2020, 02:19

... sorp-tion properties of the MOF-based colloidosome can be further controlled by the intrinsic porous nature of the Fe-soc-MOF building blocks The control of particle and macroscale structure of MOFs ... hollow, spherical nanoscale MOFs, part of the class of frameworks known as nanoMOFs Due to the innova-tive method of synthesis, the size and composition of these hollow MOF superstructures could ... nature of metal–organic frameworks allows for a variety of host–guest chemistry Yang et  al have neatly demonstrated the versatility of photoactive MOFs, carrying out the photopolymerization of a

Ngày tải lên: 29/05/2020, 12:35

... proper dilution of stock solutions Synthesize and characterization of Co‑MOF adsorbent Synthesize of Co-MOF was according to the work of Sargazi et  al [34] Briefly, 5.62  mmol of cobalt nitrate ... BMC Chemistry Open Access Application of response surface methodology for optimization of metal– organic framework based pipette‑tip solid phase extraction of organic dyes from seawater and their ... %v/v of triton X-114, a decrease in the extraction efficiency of dyes was observed This is probably due to the dilution of the analytes in larger volumes of the surfactant Optimization of MOF‑PT‑SPE

Ngày tải lên: 29/05/2020, 13:47

... liệu MOF-200 và MOF-210, với bề mặt riêng BET trên 6000 m2/g và bề mặt riêng Langmuir trên 10000 m2/g (Hình 1.5, Hình 1.6) Các vật liệu MOF-200 và MOF-210 này được phát triển trên cơ sở MOF-177 ... tích bề mặt riêng lớn hơn MOF-200 và MOF-210 Hình 1.6 Cấu trúc không gian của hai vật liệu MOF-200 và MOF-210 [6] Trang 9đang được quan tâm là sử dụng các vật liệu MOFs có bề mặt riêng lớn làm ... từ vật liệu MOFs và các ứng dụng của màng mỏng từ MOFs của nhóm nghiên cứu của tác giả Fischer và cộng sự ở Trường Đại Học Ruhr-Universität Bochum (Đức) [29]  Ứng dụng vật liệu MOFs trong các

Ngày tải lên: 23/01/2021, 11:06

... THERMODYNAMIC PROPERTIES OF METAL THIN FILMS THERMODYNAMIC PROPERTIES OF METAL THIN FILMS Nguyen Thi Hoa1( 1 ), Duong Dai Phuong2 1Fundamental Science Faculty, University of Transport and ... carried out on the thermodynamic properties of metal and nonmetal thin films [1-5] Most of them describe the method for measuring the thermodynamic properties of crystalline thin films on the ... thermodynamic properties of metal thin film, such as heat capacity, coefficient of thermal expansion,… are of great important to determine the parameters for the stability and reliability of the manufactured

Ngày tải lên: 28/06/2021, 19:39

... termination of π bonds leads to the opened bandgap of 2.01 eV in the hydrogen-functionalized AGeNR that belongs to the p-type semiconductor The feature-rich electronic properties of the hydrogen-functionalized ... Figure 1: Atomic models of the pristine AGeNR and hydrogen-functionalized AGeNR shown in top-view and side-view 3.2 Electronic properties The 1D electronic band structures of the pristine and ... in their enriched electronic properties The bandgap of 2.01 eV is opended in the H-functionalized AGeNR, and this bandgap is determined the σ orbitals of Ge atoms The enriched properties under

Ngày tải lên: 31/12/2022, 12:14

... concentration is again semi-metallic with a bandgap of 0.08eV The feature-rich electronic properties of GeNRs induced by F adatom doping effect are suitable for various applications in electronic devices ... symmetry of this charge-reducing blue region Trang 117 ConclusionIn conclusion, we studied the structural and electronic properties of adsorption systems of adsorption configurations of 1F.NRGe, ... configuration of 1F.GeNR is a metallic, while that of 2F.GeNR and 8F.GeNR is semi metallic but the electron concentration is low in the region near Fermi level This is a consequence of more electrons

Ngày tải lên: 31/12/2022, 12:22

... precisely corresponding to a bond length of 2.24 Å with a bond energy of -3.32eV, a height of 6.38 Å and an angle of deviation between the three Si atoms of 108005 which resembles the corresponding ... nttung@tdmu.edu.vn ABSTRACTS Applying first-principles calculations, the investigation of the geometrical and electronic properties of Pr adsorption armchair silicene nanoribbons structure has been established ... adsorption on the surface of ASiNRs; this material became metallic with the peak of valance band contact fermi level Moreover, the survey to find the optimal height 6.38 Å of Pr and 2.24 Å bond length

Ngày tải lên: 31/12/2022, 12:23

... flexibility of organic materials with physical sturdiness and excellent transmittance semi-of inorganic materials [4-7] Hence, ability semi-of enhancing NLO property semi-of semi-organic crystals ... incorporated advantages of both organic and inorganic crystals Many researchers pay their intense attention for finding the semi-organic family crystals using amino acid with inorganic or metal complexes ... their various properties have been analysed [9-12] High nonlinear optical coefficients organic material combines with inorganic which exhibits excellent physical properties, gives semi-organic In

Ngày tải lên: 19/03/2023, 15:26

... Luckily, Metal organic frameworks (MOFs) are inorganicorganic hybrid materials constructed by combining metal ions or clusters and organic linkers Unlike conventional adsorbents, MOFs hold outstanding ... 2.2.2 Zirconium-based metal organic framework (UiO-66 & UiO-67) 28 2.3 Application of MOFs for gas adsorption 30 2.3.1 Mechanism of gas adsorption 30 2.3.2 Metal organic frameworks for ... Gradual School of Kyung Hee University in partial fulfillment of the requirement for degree of Doctor of Philosophy Dissertation Committee Chairman Prof Eun Yeol Lee Prof Bum Jun Park Prof Chang

Ngày tải lên: 19/05/2023, 22:30

... ELECTRONIC, MAGNETIC AND OPTICAL PROPERTIES OF ATOMICALLY CONTROLLED COMPLEX OXIDE HETEROSTRUCTURES AND INTERFACES XIAO WANG NATIONAL UNIVERSITY OF SINGAPORE 2012 I ELECTRONIC, ... orbital degree of freedom in complex oxides, new properties can emerge at the interfaces of atomically flat oxide heterostructures, because of the inherent discontinuities at the interfaces. Understanding ... occupancy (in the form of 2D-nanoscopic metallic droplets) of interface sub-bands of the nearly degenerate Ti orbital in the STO. The observation of this EPS demonstrates the electronic and magnetic

Ngày tải lên: 09/09/2015, 10:07

... porous nature of such Bi-MOFs, it would be valuable to understand their gas sorption and separation properties Here, we present the gas sorption properties of three microporous Bi-MOFs, namely, ... sepa-ration [14] The structural diversity of MOFs arises due to the wide range of metal cations (or metal clusters), also known as secondary building units (SBUs), and organic linkers that can be combined ... F O Keywords: Bismuth Metal-organic frameworks Porosity Greenhouse gas capture Adsorption kinetics A B S T R A C T Bismuth-based metal-organic frameworks (Bi-MOFs) such as bismuth subgallate

Ngày tải lên: 20/12/2022, 22:16

... properties to Program Offices (e.g., Office of Water, Office of Solid Waste and Emergency Response, Office of Prevention, Pesticides and Toxic Substances) and Regional Offices Also, SPARC has ... 2003 PREDICTION OF CHEMICAL REACTIVITY PARAMETERS AND PHYSICAL PROPERTIES OF ORGANIC COMPOUNDS FROM MOLECULAR STRUCTURE USING SPARC National Exposure Research Laboratory Office of Research and ... state or distinct product The behavior of chemicals depends on the differences in electronic properties of the initial state of the system and the state of interest For example, a light absorption

Ngày tải lên: 22/03/2014, 14:20

... manipulation of the physical and chemical properties of a given MOF in a controllable manner.69,95-99 Therefore, the design and use of organic linkers as well as the selection of metals focus on MOF structures ... bonding to the metal ions and the coordination geometry of the metal nodes (metal ions or metal-containing clusters) play a decisive role in the formation of the topologies of MOF structures The ... geometry of the metal ions and the nature of thefunctional groups The variety of SBU geometries with different numbers of points of extension has been observed in MOF structures.10,21However, the metal-containing

Ngày tải lên: 02/07/2014, 13:40

... transistor (OFET) Though generally called metal- organic (MO) interfaces, metal- on -organic (M/O) interfaces are usually quite different from organic- on -metal (O/M) interfaces both in physical and electronic ... and metal- oxide interfaces xv Chapter Introduction 1.1 Metal- on -organic and organic- on -metal interfaces Despite the fact that organic semiconductors have made a great commercial success in organic ... parents iv Table of Contents Table of Contents v List of Tables viii List of Figures ix Acknowledgements xiv Abstract xv Introduction 1.1 Metal- on -organic and organic- on -metal interfaces ...

Ngày tải lên: 11/09/2015, 08:59

... demonstration of organic light emitting diodes,1,2 successful fabrication of organic thin film transistors3,4 and demonstration of organic photovoltaic.5 These results have grown the expectation to use organic ... 3, a comparative NEXAFS study of the dichroism of the C1s→π* transition of the frontier polymer chains, and of the spectrum, for both the top and bottom interfaces of rrP3HT thin films deposited ... the number of energy levels The energy gap determines the electronic and electrical properties of the conducting polymers Hence, control of the HOMO-LUMO gap and specifically the design of low band...

Ngày tải lên: 11/09/2015, 10:15

... DOS of occupied Density of States (electrons/eV) Density of States (electrons/eV) Density of States (electrons/eV) Density of States (electrons/eV) Density of States (electrons/eV) 0.6 Page of ... address the influence of axial tensions on the electronic properties of (8,0) zigzag and (5,5) armchair BNNTs Although the stress-strain profiles indicate the mechanical properties of these two BNNTs ... clearly demonstrates that the mechanical deformations of BNNTs significantly influence their electronic properties, with the electronic properties of different chirality BNNTs displaying different...

Ngày tải lên: 21/06/2014, 05:20

... preserve Cu MOF-3 architecture is proven by successful synthesis of Cu MOF-4 Cu MOF-4 loses 35% of its mass up to a temperature of 250°C The finding of Cu MOF-3N shows our class of MOF constructed ... Assembly of metal organic frameworks (MOFs) by the copolymerization of metal ions with organic linkers to give (a) flexible metal bipyridine structures with expanded diamond topology and (b) rigid metal carboxylate ... Assembly of metal organic frameworks (MOFs) by the copolymerization of metal ions with organic linkers to give (a) flexible metal bipyridine structures with expanded diamond topology and (b) rigid metal carboxylate...

Ngày tải lên: 02/07/2014, 12:59