scholarly journals Synthesis of Cobalt-Based Nanomaterials from Organic Precursors

Cobalt ◽  
2017 ◽  
Author(s):  
Maria Smyrnioti ◽  
Theophilos Ioannides
Keyword(s):  
Organic Precursors

In situ upgrading of bio-oil via CaO catalyst derived from organic precursors

2019 ◽  
Vol 37 (3) ◽  
pp. 3119-3126 ◽  
Author(s):  
Linlin Yi ◽  
Huan Liu ◽  
Kangxin Xiao ◽  
Geyi Wang ◽  
Qiang Zhang ◽  
...  
Keyword(s):  
Bio Oil ◽  
Organic Precursors

Characterization of organic precursors for chlorinous odor before and after ozonation by a fractionation technique

2016 ◽  
Vol 88 ◽  
pp. 836-843 ◽  
Author(s):  
Songkeart Phattarapattamawong ◽  
Shinya Echigo ◽  
Sadahiko Itoh
Keyword(s):  
Before And After ◽  
Organic Precursors

Vapour pressure measurement of metal organic precursors used for MOVPE

2006 ◽  
Vol 38 (3) ◽  
pp. 312-322 ◽  
Author(s):  
M. Fulem ◽  
K. Růžička ◽  
V. Růžička ◽  
T. Šimeček ◽  
E. Hulicius ◽  
...  
Keyword(s):  
Pressure Measurement ◽  
Vapour Pressure ◽  
Vapour Pressure Measurement ◽  
Metal Organic ◽  
Organic Precursors

Can We Trust on the Thermal Analysis of Metal Organic Powders for thin film preparation?

2012 ◽  
Vol 1449 ◽  
Author(s):  
Jordi Farjas ◽  
Daniel Sanchez-Rodriguez ◽  
Hichem Eloussifi ◽  
Raul Cruz Hidalgo ◽  
Pere Roura ◽  
...  
Keyword(s):  
Thin Film ◽  
Thermal Analysis ◽  
Thermal Analyses ◽  
Heat And Mass Transport ◽  
Analysis Techniques ◽  
Thin Film Preparation ◽  
Metal Organic ◽  
Organic Precursors ◽  
Film Preparation ◽  
Thermal Analysis Techniques

ABSTRACTThermal analysis techniques are routinely applied to characterize the thermal behavior of metal organic precursors used for oxide film preparation. Since the mass of films is very low, researchers do their thermal analyses on powders and consider that the results are representative of films. We will show here that, in general, this assumption is not true. Several examples involving precursors of YBa2Cu3O7-x (Ba and Y trifluoroacetates and Ba propionate) will serve to appreciate that films can behave very differently than powders due to their enhanced heat and mass transport paths. Ultimately, we will demonstrate that, in some cases, relying on powders thermal analysis may lead to erroneous conclusions.

From the Formation of the Earth to the Establishment of Luka

2021 ◽  
Vol 30 (5) ◽  
pp. 497-520
Author(s):  
Zdravka Kostova ◽  
Keyword(s):  
Natural Selection ◽  
Driving Force ◽  
Prokaryotic Cell ◽  
The Earth ◽  
Evolution Of Life ◽  
A Cell ◽  
Organic Precursors ◽  
Biotic Environment

The article discusses successive stages in the evolution of life up to the establishment of the prokaryotic cell emphasizing the transitions from pre-biotic environment to organic precursors, pre-RNA-RNA, RNA-proteins-DNA, DNA-LUCA. They are paired with the development of pre-biotic structural progenitors of a cell - micelles, vesicles, protocells, prokaryotic ancestor, two prokaryotic branches – Eubacteria and Archaebacteria. The driving force is the natural selection (chemical, biochemical and biological), maintaining the correspondence between the emerging structures and their environment.

Synthesis of Nano- 
and Microcrystallites 
of Metals Using 
Metal-Organic Precursors

2017 ◽  
pp. 213-239
Author(s):  
Giridhar U. Kulkarni ◽  
Gangaiah Mettela ◽  
S. Kiruthika
Keyword(s):  
Metal Organic ◽  
Organic Precursors

scholarly journals Non-Graphitizing Carbon: Its Structure and Formation from Organic Precursors

2019 ◽  
Vol 21 (3) ◽  
pp. 227 ◽  
Author(s):  
P.J.F. Harris
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Present Author ◽  
Precursor Chemistry ◽  
Microporous Structure ◽  
Transmission Electron ◽  
Carbon Networks ◽  
Organic Precursors ◽  
Electron Energy Loss ◽  
Carbon Network

Non-graphitizing carbon, or char, has been intensively studied for decades, but there is still no agreement about its detailed atomic structure. The first models for graphitizing and non-graphitizing carbons were proposed by Rosalind Franklin in the early 1950s, and while these are correct in a broad sense, they are incomplete. Subsequent models also fail to explain fully the structure of non-graphitizing carbons. The discovery of the fullerenes and related structures stimulated the present author and others to put forward models which incorporate non-hexagonal rings into hexagonally-bonded sp2 carbon networks, creating a microporous structure made up of highly curved fragments. However, this model has not been universally accepted. This paper reviews the models that have been put forward for non-graphitizing carbon and outlines the evidence for a fullerene-like structure. This evidence comes from transmission electron microscopy, electron energy loss spectroscopy and Raman spectroscopy. Finally, the influence of precursor chemistry on the structure of graphitizing and non-graphitizing carbons is discussed. It is well established that carbonization of oxygen–containing precursors tends to produce non-graphitizing carbons. This may be explained by the fact that the removal of oxygen from a hexagonal carbon network can result in the formation of pentagonal carbon rings.

High‐Tc Undoped and Pb‐Doped BI‐SR‐CA‐CU‐O thin Films Prepared by Organometallic Chemical Vapor Deposition

1989 ◽  
Vol 169 ◽  
Author(s):  
J. M. Zhang ◽  
H. O Marcy ◽  
L .M. Tonge ◽  
B. W. Wessels ◽  
T. J. Marks ◽  
...  
Keyword(s):  
Thin Films ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Low Pressure ◽  
High Tc ◽  
Metal Organic ◽  
Organic Precursors ◽  
Organometallic Chemical Vapor Deposition

AbstractFilms of the high‐Tc undoped and Pb‐doped Bi‐Sr‐Ca‐Cu‐O (BSCCO) superconductors have been prepared by low pressure organometallic chemical vapor deposition (OMCVD) using the volatile metal‐organic precursors Cu(acetylacetonate)2, Sr(dipivaloylmethanate)2, Ca(dipivaloylmethanate)2, and triphenyl bismuth. Factors which influence texture and morphology of the OMCVD‐derived films have been investigated, including the effects of annealing, doping, and substrates.

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