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Online since: February 2012
Authors: R. Fajgar, Jiri Vacik, Vasyl Lavrentev, Pavel Horak
Co-deposition at 500°C resulted in the formation of a large-scale pattern structure.
The strong reaction chemistry of fullerenes is based on their high hybridization capability that proceeds via various σ- and π-bonding modes.
Disruptive processes, such as thermal annealing, ion or laser irradiation, chemical doping, etc., can affect their structures and integrity.
The altered system (with a-C instead of C60) has a different organization and chemistry and responds to an additional processing (e.g., thermal annealing) in a different way than the original structure [13].
Nagase: Chemistry of Nanocarbon, John Wiley & Sons, Ltd, Chichester, UK (2010)
The strong reaction chemistry of fullerenes is based on their high hybridization capability that proceeds via various σ- and π-bonding modes.
Disruptive processes, such as thermal annealing, ion or laser irradiation, chemical doping, etc., can affect their structures and integrity.
The altered system (with a-C instead of C60) has a different organization and chemistry and responds to an additional processing (e.g., thermal annealing) in a different way than the original structure [13].
Nagase: Chemistry of Nanocarbon, John Wiley & Sons, Ltd, Chichester, UK (2010)
Online since: October 2014
Authors: Ji Shou Zhao, X.M. Zhang, J.H. Dai
DAIc
Key Laboratory of Ethnic Medicine Resource Chemistry,State Ethnic Affairs Commission & Ministry of Education,Yunnan University of Nationalities, Kunming 650031, PR China
amail: zhaojishou@163.com, bmeail: yanli5901@126.com, cemail: djh6668@sohu.com
Keywords: Pressure cyanidation; dissolution; mechanism; Palladium powder; Palladium place
Abstracts: The chemistry of the dissolution of Palladium in pressure-cyanide has not received considerable attention.
During dissolution, atoms may leave the crystal structure and enter the electrolyte along various pathways: (d)→(a); (d) →(c) →(a), or(d) →(c) →(b) →(a).The slow kinetics observed for Palladium dissolution and its response to activation suggests similar processes may be rate limiting.
Ricart: Surface Science, Vol.558 (2004) , P. 111 [16] Tan Guo, Andreas Illies, Vince Cammarata, Michael Arndt, William Sonzogni, Journal of Electroanalytical Chemistry Vol. 610 (2007), P.102–105
During dissolution, atoms may leave the crystal structure and enter the electrolyte along various pathways: (d)→(a); (d) →(c) →(a), or(d) →(c) →(b) →(a).The slow kinetics observed for Palladium dissolution and its response to activation suggests similar processes may be rate limiting.
Ricart: Surface Science, Vol.558 (2004) , P. 111 [16] Tan Guo, Andreas Illies, Vince Cammarata, Michael Arndt, William Sonzogni, Journal of Electroanalytical Chemistry Vol. 610 (2007), P.102–105
Online since: October 2023
Authors: Kamaneeya Paku, Gayatri Gaddamanugu
Molecular structures of the products possessing higher Confidence score values.
Figure 2: Molecular structures of the products possessing higher Confidence score values.
Harrision, Assessment and Reclamation of Contaminated Land, Royal Society of Chemistry, Cambridge UK, 2001
Sastry, Cation-π interaction: its role and relevance in chemistry, biology, and material science, Chem.
Sci. 2019, 5, 9, 1572–1583 [39] IBM RXN for chemistry. https://rxn.res.ibm.com
Figure 2: Molecular structures of the products possessing higher Confidence score values.
Harrision, Assessment and Reclamation of Contaminated Land, Royal Society of Chemistry, Cambridge UK, 2001
Sastry, Cation-π interaction: its role and relevance in chemistry, biology, and material science, Chem.
Sci. 2019, 5, 9, 1572–1583 [39] IBM RXN for chemistry. https://rxn.res.ibm.com
Online since: October 2010
Authors: Xue Min Yan, Yue Luo, Huan Yang, Gao Shen Su
The pore structure and surface chemical proprieties of TiO2/AC composite and AC were also investigated by N2 adsorption-desorption isotherms and Beohm titration.
The porous structures of the absorbents were characterized by adsorption/desorption of nitrogen at -196 °C by using an AUTOSORB-1 physical adsorption apparatus (Quantachrome company).
For further understanding of the effect of the TiO2, both AC and TiO2/AC(1.65 wt%) prepared under pH 7 were subjected to the following textural and surface chemistry characterization.
It has been suggested the adsorption capacity of AC towards DBT is related to both pore volume and surface chemistry.
Herein the enhanced adsorption capacity of TiO2/AC should be mainly attributed to the change of surface chemistry because the pore volume was reduced after impregnation.
The porous structures of the absorbents were characterized by adsorption/desorption of nitrogen at -196 °C by using an AUTOSORB-1 physical adsorption apparatus (Quantachrome company).
For further understanding of the effect of the TiO2, both AC and TiO2/AC(1.65 wt%) prepared under pH 7 were subjected to the following textural and surface chemistry characterization.
It has been suggested the adsorption capacity of AC towards DBT is related to both pore volume and surface chemistry.
Herein the enhanced adsorption capacity of TiO2/AC should be mainly attributed to the change of surface chemistry because the pore volume was reduced after impregnation.
Online since: January 2010
Authors: Zhong He Shui, Xiao Yan Wang, Jing Wang, Zhi Jiang Ji, Nan Ding, Hai Jian Li
Ji: Progressin Chemistry, Vol. 17(2005), p. 8
[2] W.Y.
Liu, et al.: Photochemistry and Photobiology A: Chemistry, Vol. 201(2009), p. 39 [5] F.Y.
Iyodaa, et al.: Photochemistry and Photobiology A: Chemistry, Vol.106(1997), p. 51 [9] L.
Yu, et al.: Photochemistry and Photobiology A: Chemistry, Vol.186(2007), p. 335 [11] V.
Hashimoto: Photochemistry and Photobiology A: Chemistry, Vol. 156(2003), p. 227 [17] Q.
Liu, et al.: Photochemistry and Photobiology A: Chemistry, Vol. 201(2009), p. 39 [5] F.Y.
Iyodaa, et al.: Photochemistry and Photobiology A: Chemistry, Vol.106(1997), p. 51 [9] L.
Yu, et al.: Photochemistry and Photobiology A: Chemistry, Vol.186(2007), p. 335 [11] V.
Hashimoto: Photochemistry and Photobiology A: Chemistry, Vol. 156(2003), p. 227 [17] Q.
Online since: December 2016
Authors: Remo Merijs Meri, Janis Zicans, Ingars Reinholds, Zhenija Roja
Evaluation of Mechanical and Structure Properties of Electron Beam Cross-Linked Ethylene-Octene Copolymer Nanocomposites with
Multi-Walled Carbon Nanotubes
Zhenija Roja1,a, Ingars Reinholds1,b*, Janis Zicans2,c, and Remo Merijs Meri2,d
1Department of Chemistry, University of Latvia, Latvia
2Institute of Polymer Materials, Faculty of Materials Sciences and Applied Chemistry,
Riga Technical University, Latvia
aZenija.Roja@lu.lv, bIngars.Reinholds@lu.lv, czicans@ktf.rtu.lv, dRemo.Merijs-Meri@rtu.lv
Keywords: EOC/MWCNT, mechanical properties, gel fraction, nanocomposites
Abstract.
Introduction In last decade, metallocene based Engage® ethylene-octene copolymers (EOCs) have found an attention in manufacture of nanocomposites due to regulated structure of those materials affecting desired procession, high elasticity and low viscosity, enabling to gain sufficiently high dispersion of nanofillers multi and single walled carbon nanotubes (SWCNTs and MWCNTs) [1].
Carbon nanotubes have found an application in radiation chemistry of polymers (e.g. elastomer, thermoplastic etc. matrices) affecting improved mechanical, thermal and rheological properties, and enhanced anti-oxidative protection of ionizing radiation (gamma rays) cross-linked thermoplastic polymers due to resonant structure of graphene layers that may act as radical scavengers and expand the applications of manufactured nanomaterials [3-4].
The present study deals with the research of the response of electron beam irradiation on the mechanical, thermal and structure characteristics of EOC/MWCNT nanocomposites depending on the filler content in manufactured composites.
Fig. 1 Typical stress-strain curves at 25°C for pristine EOC (1), irradiated EOC (2), and EOC/MWCNT composition with filler content of 15 wt.% (3), and for irradiated EOC (4) and EOC/MWCNT compositions with 5 wt% (5) and 15 wt.% (6) determined at 50°C As the structure of EOC, applied as composite matrix in our research, has a polyolefin type backbone and a crystallinity similar to low density polyethylene (LDPE), the characteristic changes in stress-strain behaviour for the presented composites with increase of MWCNT content are similar to that noted in previous researches in case of LDPE/MWCNT composites [7].
Introduction In last decade, metallocene based Engage® ethylene-octene copolymers (EOCs) have found an attention in manufacture of nanocomposites due to regulated structure of those materials affecting desired procession, high elasticity and low viscosity, enabling to gain sufficiently high dispersion of nanofillers multi and single walled carbon nanotubes (SWCNTs and MWCNTs) [1].
Carbon nanotubes have found an application in radiation chemistry of polymers (e.g. elastomer, thermoplastic etc. matrices) affecting improved mechanical, thermal and rheological properties, and enhanced anti-oxidative protection of ionizing radiation (gamma rays) cross-linked thermoplastic polymers due to resonant structure of graphene layers that may act as radical scavengers and expand the applications of manufactured nanomaterials [3-4].
The present study deals with the research of the response of electron beam irradiation on the mechanical, thermal and structure characteristics of EOC/MWCNT nanocomposites depending on the filler content in manufactured composites.
Fig. 1 Typical stress-strain curves at 25°C for pristine EOC (1), irradiated EOC (2), and EOC/MWCNT composition with filler content of 15 wt.% (3), and for irradiated EOC (4) and EOC/MWCNT compositions with 5 wt% (5) and 15 wt.% (6) determined at 50°C As the structure of EOC, applied as composite matrix in our research, has a polyolefin type backbone and a crystallinity similar to low density polyethylene (LDPE), the characteristic changes in stress-strain behaviour for the presented composites with increase of MWCNT content are similar to that noted in previous researches in case of LDPE/MWCNT composites [7].
Online since: August 2023
Authors: Quoc Toan Le, Efrain Altamirano-Sanchez, Hikaru Kawarazaki, Takayoshi Tanaka, Teppei Nakano
As semiconductor devices continue to scale, it is important to evaluate alternative metals on narrower wiring or via structures.
This test vehicle has a similar stack structure as that of MP18 structure shown above, i.e. 25 nm SiN/ 1 nm TiN/ 30 nm Ru/ 1 nm TiN/ 20 nm SiO2/ Si substrate, except that the dimension of the square is 2.1 x 2.1 cm2.
On the other hand, Figure 2 (b) describes the situation where the Ru layer of 50% of the squares is completely removed for studying the surface chemistry of the bottom TiN layer.
In general, one of the options is the use of formulated chemistries to clean residues on metal surfaces after patterning.
Conclusion A new combination process using UV treatment followed by APM for removing residues on MP18 sample was performed without using formulated chemistries.
This test vehicle has a similar stack structure as that of MP18 structure shown above, i.e. 25 nm SiN/ 1 nm TiN/ 30 nm Ru/ 1 nm TiN/ 20 nm SiO2/ Si substrate, except that the dimension of the square is 2.1 x 2.1 cm2.
On the other hand, Figure 2 (b) describes the situation where the Ru layer of 50% of the squares is completely removed for studying the surface chemistry of the bottom TiN layer.
In general, one of the options is the use of formulated chemistries to clean residues on metal surfaces after patterning.
Conclusion A new combination process using UV treatment followed by APM for removing residues on MP18 sample was performed without using formulated chemistries.
Online since: July 2012
Authors: Meysam Rahmat, Pascal Hubert
At low temperature, the carbon atoms under tension reorganized themselves in a secondary structure, Figs. 3-c and 3-d.
The chemical structure of PMMA is shown in Fig. 5-a, and a molecular model of a 2-mer PMMA chain is illustrated in Fig. 5-b.
(b) (a) Fig. 5: (a) Chemical structure of PMMA and (b) a 2-mer PMMA chain.
Tersoff, Modeling solid-state chemistry: interatomic potentials for multicomponent systems, Physical Review B (Condensed Matter), 39 (8) (1989) 5566
Goddard, III, DREIDING: a generic force field for molecular simulations, Journal of Physical Chemistry, 94 (26) (1990) 8897
The chemical structure of PMMA is shown in Fig. 5-a, and a molecular model of a 2-mer PMMA chain is illustrated in Fig. 5-b.
(b) (a) Fig. 5: (a) Chemical structure of PMMA and (b) a 2-mer PMMA chain.
Tersoff, Modeling solid-state chemistry: interatomic potentials for multicomponent systems, Physical Review B (Condensed Matter), 39 (8) (1989) 5566
Goddard, III, DREIDING: a generic force field for molecular simulations, Journal of Physical Chemistry, 94 (26) (1990) 8897
Online since: November 2013
Authors: Chao Song, Ling Li Ma, Xiao Li Xu, Zi Fei Peng, Fang Zhang
Hong, Luminescence of the one-dimensional structure, J.
Journal of Materials Chemistry. 12 (2002) 86-91
Chinese Journal of Inorganic Chemistry. 20 (2004) 698-702
Journal of Materials Chemistry. 13 (2003) 370-376
Chinese Journal of Inorganic Chemistry. 21 (2005) 643-646.
Journal of Materials Chemistry. 12 (2002) 86-91
Chinese Journal of Inorganic Chemistry. 20 (2004) 698-702
Journal of Materials Chemistry. 13 (2003) 370-376
Chinese Journal of Inorganic Chemistry. 21 (2005) 643-646.