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Online since: May 2016
Authors: Erik Janzén, J. Peder Bergman, Jawad Hassan, Louise Lilja
Those include adding HCl to the standard chemistry process [1] or by using chlorinated precursors [2, 3].
Growth was conducted with silane/propane (SiH4/C3H8) chemistry with hydrogen (H2) carrier gas purified through a heated palladium membrane.
Substrate and epilayer surface roughness and step structure were analyzed with atomic force microscopy (AFM).
Microsteps are the desired step structure of the epilayer surface, consisting of several steps of height corresponding to one Si-C bilayer (0.25 nm).
This is the same tendency as seen in 100 µm thick epilayers grown with chloride based chemistry [14].
Growth was conducted with silane/propane (SiH4/C3H8) chemistry with hydrogen (H2) carrier gas purified through a heated palladium membrane.
Substrate and epilayer surface roughness and step structure were analyzed with atomic force microscopy (AFM).
Microsteps are the desired step structure of the epilayer surface, consisting of several steps of height corresponding to one Si-C bilayer (0.25 nm).
This is the same tendency as seen in 100 µm thick epilayers grown with chloride based chemistry [14].
Online since: April 2005
Authors: Raimund Mellies, Stefan Kunz, Franz Nilius, Dieter Mayer, Andreas Kühner
For DSP+ mixtures containing HF
process times must not exceed 1-2 minutes if
an attack of the Al structures is to be avoided.
The tests were conducted with 6-inch production wafers with via and metal structures at 0.5-µm feature size.
Chemistry.
Conclusion A new inorganic aqueous based batch chemistry for spray-tools and recirculated wet-benches has been developed.
Inosolv 400 Fotopur ® shows complete PER removal without attacking the wafer structures, while for DSP and DSP+ incomplete residue removal and Al etching was observed.
The tests were conducted with 6-inch production wafers with via and metal structures at 0.5-µm feature size.
Chemistry.
Conclusion A new inorganic aqueous based batch chemistry for spray-tools and recirculated wet-benches has been developed.
Inosolv 400 Fotopur ® shows complete PER removal without attacking the wafer structures, while for DSP and DSP+ incomplete residue removal and Al etching was observed.
Online since: February 2021
Authors: Jason J. Keleher, Katherine M. Wortman-Otto, Abigail N. Linhart, Allie M. Mikos, Kiana A. Cahue
The specified cleaning chemistry was added to the holder containing the brush.
SiO2 Particle count for exaggerated brush cleaning of Cu with micellar structures of varying charge.
Tafel analysis of micellar cleaning chemistries to evaluate chemical activity.
Therefore, the cleaning chemistry and brush are rendered chemically inactive at the wafer surface as there are bulk non-covalent interactions between the brush and supramolecular structures.
It is seen that this method of cleaning relies heavily on the structure of the supramolecular cleaning chemistry as there is a power and time dependency which can aid the delivery of the chemistry or disrupt the structure to render it inactive.
SiO2 Particle count for exaggerated brush cleaning of Cu with micellar structures of varying charge.
Tafel analysis of micellar cleaning chemistries to evaluate chemical activity.
Therefore, the cleaning chemistry and brush are rendered chemically inactive at the wafer surface as there are bulk non-covalent interactions between the brush and supramolecular structures.
It is seen that this method of cleaning relies heavily on the structure of the supramolecular cleaning chemistry as there is a power and time dependency which can aid the delivery of the chemistry or disrupt the structure to render it inactive.
Online since: July 2006
Authors: E.F. Sheka
Sheka
Russian Peoples' Friendship University, Moscow, Russia
sheka@icp.ac.ru
Keywords: Chemical Bonding, Electron Structure, Fullerene, Medicinal Chemistry, Molecular
Magnetism, Nanomachines, Odd Electrons, Technomimetic Molecules.
Thus a medicinal chemistry of fullerenes appears [14].
Medicinal chemistry of fullerene.
The structure of the EA group is crucial for the device action.
Harrison: Carbene Chemistry, W.Kirsme (Ed.), 2 nd edn.
Thus a medicinal chemistry of fullerenes appears [14].
Medicinal chemistry of fullerene.
The structure of the EA group is crucial for the device action.
Harrison: Carbene Chemistry, W.Kirsme (Ed.), 2 nd edn.
Online since: August 2013
Authors: Hong Yao Xu, Shan Yi Guang, Xiao Li Ji, Xin Yan Su
In this paper, a triazole functional polymer was designed and achieved by high-efficiency click chemistry method.
The structure and properties of the polymer was characterized and evaluated with FTIR, NMR, UV, FL, DLLS and nonlinear optical analyses.
In this paper, the polytriazole was facilely prepared by click chemistry method and its structure and properties was investigated in detail.
The structure of monomers and the polymer were characterized by standard spectroscopic techniques, and both gave satisfactory data corresponding to their expected molecular structures.
Conclusion In this work, the triazole-based fluorene functional polymer was facilely prepared through the click chemistry reaction.
The structure and properties of the polymer was characterized and evaluated with FTIR, NMR, UV, FL, DLLS and nonlinear optical analyses.
In this paper, the polytriazole was facilely prepared by click chemistry method and its structure and properties was investigated in detail.
The structure of monomers and the polymer were characterized by standard spectroscopic techniques, and both gave satisfactory data corresponding to their expected molecular structures.
Conclusion In this work, the triazole-based fluorene functional polymer was facilely prepared through the click chemistry reaction.
Online since: August 2018
Authors: Guy Vereecke, Rita Vos, Frank Holsteyns, Quinten de Keyser, Abhishek Dutta, Haroen Debruyn
Effect of 1-D Nano-Confinement on the Kinetics of a Click-Chemistry Surface Reaction Used in Biosensors
Guy Vereecke1,a*, Haroen Debruyn2,b, Quinten De Keyser2,c, Rita Vos1,d,
Abhishek Dutta2,e and Frank Holsteyns1,f
1imec, Kapeldreef 75, 3001, Leuven, Belgium
2Faculty of Engineering Technology Campus Group T, Katholieke Universiteit Leuven, Belgium
aguy.vereecke@imec.be
Keywords: nano-confinement, click-chemistry, reaction kinetics, EDL overlap, pH shift, water structuring.
Figure 2: Structure of citric acid and its anions.
West, Fundamentals of Analytical Chemistry, 4th ed., Holt-Saunders Int.
McKay and M.G Finn, Click Chemistry in Complex Mixtures: Bioorthogonal Bioconjugation, Chemistry & Biology 21 (2014) 1075-1101
Barrow, Physical Chemistry, 4th ed., McGraw-Hill, 1979, p. 768.
Figure 2: Structure of citric acid and its anions.
West, Fundamentals of Analytical Chemistry, 4th ed., Holt-Saunders Int.
McKay and M.G Finn, Click Chemistry in Complex Mixtures: Bioorthogonal Bioconjugation, Chemistry & Biology 21 (2014) 1075-1101
Barrow, Physical Chemistry, 4th ed., McGraw-Hill, 1979, p. 768.
Online since: March 2007
Authors: F. Schuurmans, J. van Esch, S. de Feyter, A. Miura, H. Uji-i, P. Jonkheijm, A.P.H.J. Schenning, E.W. Meijer, Z. Chen, F. Würthner, F.C. De Schryver, Ben L. Feringa
Supramolecular Chemistry at the Liquid/Solid Interface
a Scanning Tunneling Microscopy Approach
S.
De Schryver 1 1 Department of Chemistry, Laboratory of Photochemistry and Spectroscopy, Katholieke Universiteit Leuven, Celestijnenlaan 200-F, 3001 Leuven, Belgium. 2 Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands. 3 Universität Würzburg, Institut für Organische Chemie, Am Hubland, D-97074 Würzburg, Germany. 4 University of Groningen, Material Science Center, Stratingh Institute, Laboratory of Organic and Inorganic Molecular Chemistry, Nijenborg 4, 9747 AG Groningen, The Netherlands.
a Steven.DeFeyter@chem.kuleuven.be ¶ Corresponding author Keywords: scanning tunneling microscopy, supramolecular chemistry, physisorption, self-assembly, chirality Abstract.
STM images and chemical structures of A) type 1 (n=4) at the 1,2,4-trichlorobenzene/graphite interface.
Molecular chirality is transferred to the rosette structures which in turn form chiral 2D crystalline patterns.
De Schryver 1 1 Department of Chemistry, Laboratory of Photochemistry and Spectroscopy, Katholieke Universiteit Leuven, Celestijnenlaan 200-F, 3001 Leuven, Belgium. 2 Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands. 3 Universität Würzburg, Institut für Organische Chemie, Am Hubland, D-97074 Würzburg, Germany. 4 University of Groningen, Material Science Center, Stratingh Institute, Laboratory of Organic and Inorganic Molecular Chemistry, Nijenborg 4, 9747 AG Groningen, The Netherlands.
a Steven.DeFeyter@chem.kuleuven.be ¶ Corresponding author Keywords: scanning tunneling microscopy, supramolecular chemistry, physisorption, self-assembly, chirality Abstract.
STM images and chemical structures of A) type 1 (n=4) at the 1,2,4-trichlorobenzene/graphite interface.
Molecular chirality is transferred to the rosette structures which in turn form chiral 2D crystalline patterns.
Online since: May 2014
Authors: Kazuhide Ichikawa, Akitomo Tachibana, Hiroo Nozaki
The electronic structures used in this paper are obtained by the Gaussian 09 [6].
To compute the stress tensor density (Eq. 7), tension density (Eq. 7) and kinetic energy density (Eq. 9), from the electronic structure data, we use the QEDynamics package [7].
The topics discussed here are only limited examples of the field theoretic approach for chemistry.
In Fundamental World of Quantum Chemistry, A Tribute to the Memory of Per-Olov Löwdin, E.
In Concepts and Methods in Modern Theoretical Chemistry, S.
To compute the stress tensor density (Eq. 7), tension density (Eq. 7) and kinetic energy density (Eq. 9), from the electronic structure data, we use the QEDynamics package [7].
The topics discussed here are only limited examples of the field theoretic approach for chemistry.
In Fundamental World of Quantum Chemistry, A Tribute to the Memory of Per-Olov Löwdin, E.
In Concepts and Methods in Modern Theoretical Chemistry, S.
Online since: January 2014
Authors: Chao Yu Hao, Gui Long Chi, Ji Ren Wang, Qing Biao Zhao
Using quantum chemistry calculation method, the effect of hydrogen bonding on the formation of complexes that formed by three nitrogen-containing active structures of different aromatic and inhibitor were calculated in B3LYP/6-311G* levels.
After H2O participating ligand through hydrogen bonds, the complexes formed Ca-O-H-O four-membered ring structure in the geometrical structures.
In this paper, using the method of quantum chemistry calculation, the role of hydrogen bonds to form three different aromaticity complexes by which N-containing aromatic coal structure and activity inhibitor ware calculated at B3LYP/6-311G * level.
Quantum chemistry theory of coal spontaneous combustion [M].
Coal structure and its reactivity [M].
After H2O participating ligand through hydrogen bonds, the complexes formed Ca-O-H-O four-membered ring structure in the geometrical structures.
In this paper, using the method of quantum chemistry calculation, the role of hydrogen bonds to form three different aromaticity complexes by which N-containing aromatic coal structure and activity inhibitor ware calculated at B3LYP/6-311G * level.
Quantum chemistry theory of coal spontaneous combustion [M].
Coal structure and its reactivity [M].
Online since: May 2012
Authors: Li He Yin, Jia Qiu Dong
This paper took Bulang River basin as case study, analysis and discussion were conducted to water chemistry and isotopes tests results of water samples.
Using water chemistry and isotopes(δD, δ18O)to study on conversion relation between surface water and groundwater is widely used at present.
This paper aims to analyze the interactions between surface water and groundwater using water chemistry and isotope test results based on water samples collected from Bulang River basin, and finally providing basis for future research on efficient use of water resources.
Discharge of wind-blown sand beach lake sediment phreatic water is restricted by geological structures of aquifers, and discharge is usually in form of percolation and overflow to rivers and ditches.
The shallow ground water chemistry of arsenic,fluorine and major elements: Eastern Owens Lake,California [J] .
Using water chemistry and isotopes(δD, δ18O)to study on conversion relation between surface water and groundwater is widely used at present.
This paper aims to analyze the interactions between surface water and groundwater using water chemistry and isotope test results based on water samples collected from Bulang River basin, and finally providing basis for future research on efficient use of water resources.
Discharge of wind-blown sand beach lake sediment phreatic water is restricted by geological structures of aquifers, and discharge is usually in form of percolation and overflow to rivers and ditches.
The shallow ground water chemistry of arsenic,fluorine and major elements: Eastern Owens Lake,California [J] .