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Online since: February 2021
Authors: Sian Theng, Fransisca Sudargho, Ara Philipossian, Jason J. Keleher, Carolyn Graverson, Katherine M. Wortman-Otto, Yasa Sampurno
It must be noted that the cleaning chemistry employed will heavily influence the shear force imposed at the brush interface due to the changes in kinetic and thermodynamic exchange necessary to flip the charge of the particle.
Some examples of these chemistries currently used include redox [1,2] chemistries for charge flipping [3,4] and, more recently, supramolecular assemblies, which can be used for encapsulation [5] and as rheological modifiers to control shear force/COF.
At all conditions, SDBS causes higher shear forces as compared to PSSA, which can be correlated to the shape of the supramolecular structure (i.e., micellar vs. polyelectrolyte).
The interplay between “Force Engineering” and “Structure Activity Engineering” has now become critical in PVA brush scrubbing.
Keleher, Development of “soft” cleaning chemistries for enhanced STI post-CMP cleaning, ECS Trans. 92 (2019) 165-174
Some examples of these chemistries currently used include redox [1,2] chemistries for charge flipping [3,4] and, more recently, supramolecular assemblies, which can be used for encapsulation [5] and as rheological modifiers to control shear force/COF.
At all conditions, SDBS causes higher shear forces as compared to PSSA, which can be correlated to the shape of the supramolecular structure (i.e., micellar vs. polyelectrolyte).
The interplay between “Force Engineering” and “Structure Activity Engineering” has now become critical in PVA brush scrubbing.
Keleher, Development of “soft” cleaning chemistries for enhanced STI post-CMP cleaning, ECS Trans. 92 (2019) 165-174
Online since: April 2021
Authors: Tian Le Wang
Water molecules are used as a liquid phase dispersing medium to fill the internal voids of three-dimensional network structure.
Materials Sodium hyaluronate (HA, Mn = 1-10 w, Energy Chemistry), alendronate Sodium (ALN, 95%, Energy Chemistry), N-hydroxysuccinimide (NHS, 99%, Energy Chemical), Doxorubicin (DOX), 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDCI, 95%, Energy Chemistry), tetra-PEG-NHS and tetra-PEG-NH2 (Mn = 2 w, Xiamen Sinobage Biotechnology Co., Ltd.), hydrochloric acid (37%), triethylamine (TEA, 99%, Beijing Chemical Works), anhydrous diethyl ether, n-Hexane, N,N-dimethylformamide (DMF) and methanol (reagent grade, BCW), Ultrapure Water and Liquid nitrogen are obtained from ICCAS. 2.2.
PEG hydrogel has regular molecular structures and chemical cross-linked structures, so that it shows regular network with uniform pore structures in Figure 7A.
After immersing HA-ALN in CaCl2 solutions, the physically crosslinked network structures can be formed (Figure 7B).
Although it is a network structure formed by physical ion-crosslinking, the skeleton structure of hydeogels is relatively strong and compatible for cell growth and adhesion.
Materials Sodium hyaluronate (HA, Mn = 1-10 w, Energy Chemistry), alendronate Sodium (ALN, 95%, Energy Chemistry), N-hydroxysuccinimide (NHS, 99%, Energy Chemical), Doxorubicin (DOX), 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDCI, 95%, Energy Chemistry), tetra-PEG-NHS and tetra-PEG-NH2 (Mn = 2 w, Xiamen Sinobage Biotechnology Co., Ltd.), hydrochloric acid (37%), triethylamine (TEA, 99%, Beijing Chemical Works), anhydrous diethyl ether, n-Hexane, N,N-dimethylformamide (DMF) and methanol (reagent grade, BCW), Ultrapure Water and Liquid nitrogen are obtained from ICCAS. 2.2.
PEG hydrogel has regular molecular structures and chemical cross-linked structures, so that it shows regular network with uniform pore structures in Figure 7A.
After immersing HA-ALN in CaCl2 solutions, the physically crosslinked network structures can be formed (Figure 7B).
Although it is a network structure formed by physical ion-crosslinking, the skeleton structure of hydeogels is relatively strong and compatible for cell growth and adhesion.
Online since: May 2021
Authors: Mudasir Mudasir, Karna Wijaya, Harno Dwi Pranowo, Ihsanul Arief
The 3D descriptors of optimized structures then calculated using PaDEL Descriptor[13].
This method was chosen by comparing the optimized geometry with the experimental structure[6].
Zheng, Structure and Anti-HIV Activity of Betulinic Acid Analogues, Curr.
Cramer, Essentials of computational chemistry, second ed., John Wiley & Sons Ltd, Chichester, 2004
Sivakumar, Chemometrics Applications and Research: QSAR in Medicinal Chemistry, Apple Academic Press, Oakville, 2016.
This method was chosen by comparing the optimized geometry with the experimental structure[6].
Zheng, Structure and Anti-HIV Activity of Betulinic Acid Analogues, Curr.
Cramer, Essentials of computational chemistry, second ed., John Wiley & Sons Ltd, Chichester, 2004
Sivakumar, Chemometrics Applications and Research: QSAR in Medicinal Chemistry, Apple Academic Press, Oakville, 2016.
Online since: October 2006
Authors: Jing Yu Shi, Matthew L. Mottern, Henk Verweij, Krenar Shqau
They produce fine-grained porous and
dense micro-structures that cannot be realized otherwise.
In particular the latter requires careful control of solution and interfacial chemistry to achieve proper colloidal stability, during and after the synthesis process.
• Adhesion control by targeted design of interfacial chemistries.
The latter, especially, requires careful control of solution and interfacial chemistry to achieve proper colloidal stability, during and after the synthesis process.
The remaining open porosity is probed by measuring a probe gas permeability of the structure.
In particular the latter requires careful control of solution and interfacial chemistry to achieve proper colloidal stability, during and after the synthesis process.
• Adhesion control by targeted design of interfacial chemistries.
The latter, especially, requires careful control of solution and interfacial chemistry to achieve proper colloidal stability, during and after the synthesis process.
The remaining open porosity is probed by measuring a probe gas permeability of the structure.
Online since: August 2012
Authors: Paulo Sergio da Silva Porto, José Rafael C. Proveti, E.P. Muniz, R.D. Pereira, D.R. Araujo
Paramagnetism is found in noncrystalline samples whose detailed structure may be either in the form of a crystalline anion lattice with disorder among the cation sites or more probably in the form of a totally disordered state
Fig. 1 – Schematic representation of nickel ferrite structure.
Al Angari: Materials Chemistry and Physics 115 (2009), p. 578
Inomata: Chemistry of Materials 12 (2000), p. 3705
Gabal: Journal of Physics and Chemistry of Solids 64 (2003), p. 1375
Tanabe: The Journal of Physical Chemistry 90 (1986), p. 3148.
Al Angari: Materials Chemistry and Physics 115 (2009), p. 578
Inomata: Chemistry of Materials 12 (2000), p. 3705
Gabal: Journal of Physics and Chemistry of Solids 64 (2003), p. 1375
Tanabe: The Journal of Physical Chemistry 90 (1986), p. 3148.
Online since: April 2005
Authors: Michael B. Korzenski, D.D. Bernhard, T.H. Baum, Takeshi Hattori, Hitoshi Kuniyasu, Koichiro Saga
These structures are formed in close proximity to each other and can become physically bonded
together during aqueous cleaning due to the high surface tension of water during the wetting and
subsequent drying of the structures.
Therefore, removal of contamination on these structures without pattern collapse or stiction is difficult.
Supercritical carbon dioxide (SCCO2) provides an alternative method for cleaning fragile fine structures or high aspect-ratio structures.
The fluid in the view cell was stirred to allow dissolution of the chemistry mixture into the CO2 until an optically transparent SCCO2/co-solvent formulation was formed.
As a result, the SCCO2 solution can transport the chemistry to the sample much more efficiently and aid in solvating removed particles.
Therefore, removal of contamination on these structures without pattern collapse or stiction is difficult.
Supercritical carbon dioxide (SCCO2) provides an alternative method for cleaning fragile fine structures or high aspect-ratio structures.
The fluid in the view cell was stirred to allow dissolution of the chemistry mixture into the CO2 until an optically transparent SCCO2/co-solvent formulation was formed.
As a result, the SCCO2 solution can transport the chemistry to the sample much more efficiently and aid in solvating removed particles.
Online since: July 2021
Authors: Mohammed A. Al-Seady, Nihal A. Abdul Wahhab, Hamid I. Abbood, Hayder M. Abduljlil
Export structure to Gaussian 5.0 version for display system.
Theoretical Background In order to investigate the electronic systems, electronic structure, density functional theory (DFT) are employed for this purpose which is widely used in quantum mechanical method in physics and chemistry.
Furthermore, DFT is a useful method in physics and chemistry computational [26].
Belen'kii: Chemistry of Heterocyclic Compounds, vol. 31, (1995), pp. 1137-1139
Dixon: The Journal of Physical Chemistry A, vol. 107, (2003), pp. 4184-4195.
Theoretical Background In order to investigate the electronic systems, electronic structure, density functional theory (DFT) are employed for this purpose which is widely used in quantum mechanical method in physics and chemistry.
Furthermore, DFT is a useful method in physics and chemistry computational [26].
Belen'kii: Chemistry of Heterocyclic Compounds, vol. 31, (1995), pp. 1137-1139
Dixon: The Journal of Physical Chemistry A, vol. 107, (2003), pp. 4184-4195.
Online since: January 2013
Authors: Zhi Gang Chen, Jun Chao Qian, Cheng Gu, Juan Ning Ma, Ping Li, Feng Chen, Cheng Bao Liu
The results showed that TiO2 sample inherited the porous structure of original template.
Introduction Great interest has been attracted by in self-assembling of nano-structured building blocks into hierarchical structures in recent decades[1,2].
The products are illuminated in terms of their crystallinity, morphology, and structures.
Fig. 1c and d shows the structure of bio-morphic TiO2 is dominated by thin-sheet-like structures and the lamellae on the bio-morphic TiO2 are made up of several layers of nanosheets.
Lieber, One-dimensional nanostructures: Chemistry, physics and applications, Solid State Commun. 107 (1998) 607-616
Introduction Great interest has been attracted by in self-assembling of nano-structured building blocks into hierarchical structures in recent decades[1,2].
The products are illuminated in terms of their crystallinity, morphology, and structures.
Fig. 1c and d shows the structure of bio-morphic TiO2 is dominated by thin-sheet-like structures and the lamellae on the bio-morphic TiO2 are made up of several layers of nanosheets.
Lieber, One-dimensional nanostructures: Chemistry, physics and applications, Solid State Commun. 107 (1998) 607-616
Online since: October 2006
Authors: W.C. Mitchel, Wei Jie Lu, W.E. Collins, J.A. Michel, C.M. Lukehart
Mitchel
4
1
Department of Chemistry, Fisk University, Nashville, TN 37208, USA
2
Department of Chemistry, Vanderbilt University, Nashville, TN 37235, USA
3
Department of Physics, Fisk University, Nashville, TN 37208, USA
4
Air Force Research Laboratory, Materials and Manufacturing Directorate, AFRL/MLPS, WrightPatterson
AFB, OH 45433, USA
a
e-mail: wlu@fisk.edu
Keywords: ohmic contacts, graphite intercalated compounds, and oxygen compounds
Abstract Ohmic contacts on SiC have been investigated extensively in the past decade.
The interfacial structures at the atomic scale responsible for forming ohmic contacts have not been revealed.
Both Ni and carbon films were deposited by DC sputtering to form Ni/C/SiC structure.
The finding provides a new path to correlate the interfacial structures and ohmic contact formation on SiC.
Acknowledgment The authors at Fisk University acknowledge supports from Office of Naval Research (N00014-031-0843) and NSF through the Fisk Center of Physics and Chemistry of Materials (HRD-0420516).
The interfacial structures at the atomic scale responsible for forming ohmic contacts have not been revealed.
Both Ni and carbon films were deposited by DC sputtering to form Ni/C/SiC structure.
The finding provides a new path to correlate the interfacial structures and ohmic contact formation on SiC.
Acknowledgment The authors at Fisk University acknowledge supports from Office of Naval Research (N00014-031-0843) and NSF through the Fisk Center of Physics and Chemistry of Materials (HRD-0420516).