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Online since: October 2010
Authors: Rénal Backov, Nicolas Brun, Simona Ungureanu, Florent Carn, Béatriz Julián-López
The notion of complexity in chemical science is illustrated inhere through the concept of integrative chemistry.
Introduction Nowadays chemists are request to envisage materials more and more complex in nature and structure, bearing polyfunctionnality and, at the extreme, being able to develop some degree of autonomy taking inspiration from living organisms.
From this way of thinking has recently emerged the concept of Integrative Chemistry [2,3].
This new transversal domain of chemical science be defined as an “interdisciplinary tool box” where advanced functional materials having hierarchical structures can be tailor made via the smart integration of soft chemistry based pathways and the versatile processing conditions offered by soft-matter physical-chemistry.
Scherrer, in :The physics and chemistry of sol-gel processing, Academic, san Diego (1990) [6] F.
Introduction Nowadays chemists are request to envisage materials more and more complex in nature and structure, bearing polyfunctionnality and, at the extreme, being able to develop some degree of autonomy taking inspiration from living organisms.
From this way of thinking has recently emerged the concept of Integrative Chemistry [2,3].
This new transversal domain of chemical science be defined as an “interdisciplinary tool box” where advanced functional materials having hierarchical structures can be tailor made via the smart integration of soft chemistry based pathways and the versatile processing conditions offered by soft-matter physical-chemistry.
Scherrer, in :The physics and chemistry of sol-gel processing, Academic, san Diego (1990) [6] F.
Online since: April 2014
Edited by: Yue Li
The 52 papers are grouped as follows:
Chapter 1: Ceramic Materials and Technologies,
Chapter 2: Material Physics and Applied Chemistry,
Chapter 3: Chemical Engineering and Technologies,
Chapter 4: Nano-Materials and Technologies,
Chapter 5: Biomaterials,
Chapter 6: Metals and Alloy,
Chapter 7: Materials Processing in Mechanical Engineering,
Chapter 8: Materials of Engineering Structures Keyword: Ceramic Materials and Technologies, Material Physics and Applied Chemistry, Chemical Engineering and Technologies, Nano-Materials and Technologies, Biomaterials, Metals and Alloy, Materials Processing in Mechanical Engineering, Materials of Engineering Structures
Online since: September 2016
Authors: Jens Rip, Frank Holsteyns, R. Jonckheere, Antoine Pacco, D. Dattilo, U. Dietze, J. Kruemberg
Optimization of EUV Reticle Cleaning by Evaluation of Chemistries on Wafer-Based Mimic Test Structures
A.
The resistance of Mo and Si towards alkaline chemistries was tested and quantified using these test structures.
Results and discussion Proof of concept of the mimic test structures.
APM was selected as a first test chemistry since an adverse effect on the Mo/Si layer is expected, more particularly, etching of the Mo metal [3].
This proves that the test structures can be used for the evaluation of different cleaning chemistries through a qualitative and quantitative inspection of the Mo/Si multilayer after immersion in the respective chemistries.
The resistance of Mo and Si towards alkaline chemistries was tested and quantified using these test structures.
Results and discussion Proof of concept of the mimic test structures.
APM was selected as a first test chemistry since an adverse effect on the Mo/Si layer is expected, more particularly, etching of the Mo metal [3].
This proves that the test structures can be used for the evaluation of different cleaning chemistries through a qualitative and quantitative inspection of the Mo/Si multilayer after immersion in the respective chemistries.
Online since: September 2014
Authors: Els Kesters, Q.T. Le, D. Yu, M. Shen, S. Braun, A. Klipp, F. Holsteyns
Post etch residue removal and material compatibility in BEOL using formulated chemistries.
Park, 32853 Taoyuan, Taiwan 3 BASF SE, 67056 Ludwigshafen, Germany akesterse@imec.be Keywords: SADP, post etch residues, BEOL, aqueous chemistries, selectivity Introduction A possible way to realize a 22.5 nm ½ pitch and beyond BEOL interconnect structures within the low-k material is the partial-trench via first with self-aligned double patterning (SADP) integration approach.
The post etch residue (PER) amount and properties are specific and depend on the stack structure and the plasma that is used for patterning.
Experimental part A fluorocarbon model polymer was used as a test vehicle to assess the PER removal by wet chemistries.
Only the low-k dielectric squares covered by this model polymer were used to assess the wet chemistries.
Park, 32853 Taoyuan, Taiwan 3 BASF SE, 67056 Ludwigshafen, Germany akesterse@imec.be Keywords: SADP, post etch residues, BEOL, aqueous chemistries, selectivity Introduction A possible way to realize a 22.5 nm ½ pitch and beyond BEOL interconnect structures within the low-k material is the partial-trench via first with self-aligned double patterning (SADP) integration approach.
The post etch residue (PER) amount and properties are specific and depend on the stack structure and the plasma that is used for patterning.
Experimental part A fluorocarbon model polymer was used as a test vehicle to assess the PER removal by wet chemistries.
Only the low-k dielectric squares covered by this model polymer were used to assess the wet chemistries.
Online since: June 2017
Authors: Deng Ming Chen, Yi Long Ma, Chun Hong Li, Jian Chun Sun, Bin Shao, Dong Ling Guo, Bing Bing Li, Qiang Zheng
Moreover, the magnetic domain structure of AlNiCo 9 was also studied.
The crystal structure of the sample are determined by Rigaku Smart Lab X-ray diffractometer with Cu Kα radiation.
The chemistry composition and magnetic properties of AlNiCo 9 are shown in Table 1.
Microstructure and Chemistry distribution.
The HAADF STEM image for transverse section taken along the [001] zone axis shows a “chessboard” like structure (Fig. 4a).
The crystal structure of the sample are determined by Rigaku Smart Lab X-ray diffractometer with Cu Kα radiation.
The chemistry composition and magnetic properties of AlNiCo 9 are shown in Table 1.
Microstructure and Chemistry distribution.
The HAADF STEM image for transverse section taken along the [001] zone axis shows a “chessboard” like structure (Fig. 4a).
Online since: January 1992
Edited by: J. Nowotny
Chemistry and defect chemistry of barium titanate, which is a model ternary oxide of a perovskite-type structure, are reviewed in more detail including preparation of fine powders.
Several issues related to ceramic interfaces such as interface chemistry in perovskite-type materials and their structure based on electron microscopy studies are the subject of two papers.
Several issues related to ceramic interfaces such as interface chemistry in perovskite-type materials and their structure based on electron microscopy studies are the subject of two papers.
Online since: November 2012
Authors: Irina Zvereva, Liliya Abdulaeva, Oleg Silyukov, Yu. Petrov
Soft chemistry synthesis of complex oxides using protonic form of titanates HLnTiO4 (Ln=La, Nd)
L.
Characterization by SEM, powder XRD and TGA has been performed for the determination of the structure and composition of synthesized oxides.
The scheme in Fig.7 demonstrates three ways of soft chemistry reactions. 1.
Chislov, Formation of the complex oxide NaNdTiO4, Glass Physics and Chemistry 34 (2008) 749-755 [3] I.A.
Chislov, Ion-exchange reactions in the structure of perovskite-like layered oxides: Ι.
Characterization by SEM, powder XRD and TGA has been performed for the determination of the structure and composition of synthesized oxides.
The scheme in Fig.7 demonstrates three ways of soft chemistry reactions. 1.
Chislov, Formation of the complex oxide NaNdTiO4, Glass Physics and Chemistry 34 (2008) 749-755 [3] I.A.
Chislov, Ion-exchange reactions in the structure of perovskite-like layered oxides: Ι.
Online since: December 2012
Authors: Bao Hua Wang, Shi Jie Li, Bing Kui Miao
The Mineral Chemistry and Classification of New Ordinary Chondrites Collected in Antarctica
WANG Baohua1,2,a, LI Shijie3,b, MIAO Bingkui1,2,c
1Key Laboratory of Geological Engineering Centre of Guangxi Provinc, Guilin, China 541004
2College of Earth Sciences, Guilin University of Technology, Guilin, China 541004
3Institute of Geochemistry, Chinese A cademy of Sciences, Guiyang, China 550022
awangbaohua@glite.edu.cn, bldlshijie@126.com, cmbk@glite.edu.cn
Keywords: ordinary chondrites, mineral chemistry, classification, Antarctica
Abstract: Petrography and mineral chemistry of ninety-eight ordinary chondrites from Grove Mountains, Antarctica, have been studied, in order to assign their chemical-petrographic types.
This work focuses on mineral chemistry and petrology of 98 meteorites collected in Grove Mountains, then further to classify them and discuss the features of weathering and shock metamorphism of these meteorites. 1.
Chondrule structure, matrix recrystallization, mineral assemblages, grain size of feldspar, shock effects and weathering degree etc are observed and studied by reflective and transmission microscopy, at the same time mineral types are identified.
Conclusions (1) Mainly based on mineral chemistry of olivine and low-Ca pyroxene and petrological features of metal contents, chondrule textures and matrix recrystallization, 98 GRV meteorites classification has been carried out with the result as follows: 21 H4, 9 H5, 6 H6, 25 L5 and 37 L6
This work focuses on mineral chemistry and petrology of 98 meteorites collected in Grove Mountains, then further to classify them and discuss the features of weathering and shock metamorphism of these meteorites. 1.
Chondrule structure, matrix recrystallization, mineral assemblages, grain size of feldspar, shock effects and weathering degree etc are observed and studied by reflective and transmission microscopy, at the same time mineral types are identified.
Conclusions (1) Mainly based on mineral chemistry of olivine and low-Ca pyroxene and petrological features of metal contents, chondrule textures and matrix recrystallization, 98 GRV meteorites classification has been carried out with the result as follows: 21 H4, 9 H5, 6 H6, 25 L5 and 37 L6
Online since: June 2014
Authors: Suraya Ahmad Kamil, Muhd Firdaus Kasim, Norlida Kamarulzaman
Zinc oxide nanostructures have been done by many scientists but amongst the soft chemistry methods, chelating agents are normally used.
In this work zinc oxide nanostructures have been synthesized using a soft chemistry method without using a chelating agent.
Chelating agents are normally used in the soft chemistry methods.
Experimental The synthesis of ZnO powders were prepared by using a soft chemistry method.
The ZnO materials obtained are single phase and have hexagonal structure with space group P63mc.
In this work zinc oxide nanostructures have been synthesized using a soft chemistry method without using a chelating agent.
Chelating agents are normally used in the soft chemistry methods.
Experimental The synthesis of ZnO powders were prepared by using a soft chemistry method.
The ZnO materials obtained are single phase and have hexagonal structure with space group P63mc.
Online since: September 2013
Authors: Elena B. Ivanova, Tatyana N. Gnitetskaya
Table cells at the intersection of rows and columns are marked when the physical concept is used in this structure element of the course of chemistry.
The interdisciplinary connections in the table are presented as follows: a diamond is placed in the cell that corresponds to the structure element of chemistry where the physical concept is used.
The cell is painted if the structure element of chemistry course concurs with the moment of formation of that physical concept in the course of chemistry.
Table 1 Distribution of physical concepts in the structure of a course of chemistry fragment) Structure of a course of chemistry Elements of knowledge of a course of physics Atomic-molecular theory D.I.
Relative maximum length of the interdisciplinary connection established through the elements of knowledge of a certain group of elements of knowledge: (1) where imax is a number of a structure element of the course of chemistry where the connection is completed; kμ is a root node or a number of a structure element where this physical concept is used for the first time in the course of chemistry; N is a number of structure elements of the course of chemistry.
The interdisciplinary connections in the table are presented as follows: a diamond is placed in the cell that corresponds to the structure element of chemistry where the physical concept is used.
The cell is painted if the structure element of chemistry course concurs with the moment of formation of that physical concept in the course of chemistry.
Table 1 Distribution of physical concepts in the structure of a course of chemistry fragment) Structure of a course of chemistry Elements of knowledge of a course of physics Atomic-molecular theory D.I.
Relative maximum length of the interdisciplinary connection established through the elements of knowledge of a certain group of elements of knowledge: (1) where imax is a number of a structure element of the course of chemistry where the connection is completed; kμ is a root node or a number of a structure element where this physical concept is used for the first time in the course of chemistry; N is a number of structure elements of the course of chemistry.