scholarly journals Si-rich-SiO2 layers with high excess silicon content: Light emission and structural properties

2009 ◽  
Vol 2 (2) ◽  
pp. 147-159
Author(s):  
L. Khomenkova ◽  
N. Korsunska ◽  
M. Baran ◽  
T. Stara ◽  
V. Yukhymchuk ◽  
...  
Keyword(s):  
Structural Properties ◽  
Silicon Content ◽  
Light Emission ◽  
Excess Silicon

Structural and light emission properties of silicon-based nanostructures with high excess silicon content

2009 ◽  
Vol 41 (6) ◽  
pp. 1015-1018 ◽  
Author(s):  
L. Khomenkova ◽  
N. Korsunska ◽  
M. Baran ◽  
B. Bulakh ◽  
T. Stara ◽  
...  
Keyword(s):  
Silicon Content ◽  
Light Emission ◽  
Emission Properties ◽  
Excess Silicon ◽  
Silicon Based

scholarly journals Division of shale sequences and prediction of the favorable shale gas intervals: an example of the Lower Cambrian of Yangtze Region in Xiuwu Basin

2019 ◽  
Vol 11 (1) ◽  
pp. 183-195
Author(s):  
Zhuo Li ◽  
Kun Zhang ◽  
Yan Song ◽  
Zhenxue Jiang ◽  
Xiaoxue Liu ◽  
...  
Keyword(s):  
Shale Gas ◽  
Silicon Content ◽  
Lower Cambrian ◽  
Concentration Distribution ◽  
Hydrothermal Activity ◽  
Effective Porosity ◽  
Hydrocarbon Exploration ◽  
Sequence Stratigraphic ◽  
Excess Silicon ◽  
Rising Sea Level

Abstract It is a common method to use sequence stratigraphic theory to identify favourable intervals in hydrocarbon exploration. The Lower Cambrian shale of Well Jiangye-1 in Yangtze Region in Xiuwu Basin was chosen as the research object. The content of excess silicon of siliceous minerals in shale was calculated quantitatively, and the concentration distribution of Al, Fe, Mn showed that the excess silicon is of hydrothermally origin and the shale deposited in an environment with hydrothermal activity. Using U/Th values in the study, combined with lithology and logging data, in order to divide sequences of the Lower Cambrian shale in Yangtze Region in Xiuwu Basin. The result shows that the shale of the Lower Cambrian shale is recognized as 1 2nd sequence (TST-RST, TST = Transgressive systems tract; RST = Regressive systems tract) and then further subdivided into 5 3rd sequences (SQ1-SQ5). During the deposition of SQ2 and SQ3, hydrothermal activity was active, and their excess silicon content was generally above 20%-30%. Rising sea level and active hydrothermal activity were beneficial for the enrichment of siliceous minerals and organic matter. Based on the comparison of the reservoir parameters, it tells that SQ2 and SQ3 have relatively higher content of TOC, higher content of brittle minerals (such as siliceous minerals, carbonate minerals and so on), larger effective porosity and higher content of gas, which make it as the most favourable intervals of the Lower Cambrian in Xiuwu Basin.

scholarly journals Triboluminescence of Centrosymmetric Lanthanide β-Diketonate Complexes with Aggregation-Induced Emission

Molecules ◽  
2019 ◽  
Vol 24 (4) ◽  
pp. 662 ◽  
Author(s):  
Ho-Yin Wong ◽  
Wesley Chan ◽  
Ga-Lai Law
Keyword(s):  
Symmetric Space ◽  
Structural Properties ◽  
Light Emission ◽  
Molecular Packing ◽  
Mechanical Forces ◽  
Space Group ◽  
Aggregation Induced Emission ◽  
Crystal Structural

Triboluminescence (TL) is a form of light emission induced upon mechanical forces on the material. However, our understanding of this phenomenon is still unclear and more examples are therefore needed in order to elucidate its mechanism. In this work, two types of TL complexes, [Eu(pp-dbm-Cl2)3phen] and [Eu(mm-dbm-Cl2)3phen], which also displays aggregation-induced emission (AIE) were synthesized and investigated for its photo-physical and crystal structural properties. These complexes were crystallized in a centro-symmetric space group P21/n, and remarkably, displayed TL upon grinding that may be due to the presence of extensive π···π, C-H···π and C-H···Cl-C interactions in the close molecular packing of its structure. This rare example deviates from the widely accepted mechanism of TL, hence widening the scope of our understanding in the area.

LIGHT EMISSION AND STRUCTURAL PROPERTIES OF Al2O3:SiOC NANOCOMPOSITES

2017 ◽  
pp. 122-125
Author(s):  
D. V. Kysil ◽  
A. V. Vasin ◽  
S. V. Sevastianov ◽  
Yu. P. Piryatinsky ◽  
S. P. Starik ◽  
...  
Keyword(s):  
Structural Properties ◽  
Light Emission

scholarly journals White light emission in low-dimensional perovskites

2019 ◽  
Vol 7 (17) ◽  
pp. 4956-4969 ◽  
Author(s):  
Daniele Cortecchia ◽  
Jun Yin ◽  
Annamaria Petrozza ◽  
Cesare Soci
Keyword(s):  
Structural Properties ◽  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
Photophysical Processes ◽  
Low Dimensional

Structural properties closely affect the photophysical processes underlying photoluminescence broadening and white-light emission in low-dimensional perovskites.

Morphology of Si Phase in Al-Mg-Si-Cu Alloys with Excess Si Addition

2014 ◽  
Vol 783-786 ◽  
pp. 161-167 ◽  
Author(s):  
Yi Han ◽  
Chu Yan Wang ◽  
Tong Guang Zhai ◽  
Hiromi Nagaumi
Keyword(s):  
Thermodynamic Calculation ◽  
Silicon Content ◽  
Experimental Results ◽  
Excess Silicon ◽  
Dsc Measurements ◽  
Cu Alloy ◽  
Cu Alloys ◽  
Dsc Curves ◽  
Si Addition ◽  
Good Agreement

The morphology of Si phase and its growth manner in the Al-Mg-Si-Cu alloys with amounts of excess silicon were investigated using by a combination of the higher magnification microstructure and DSC measurements. Solidification characteristics of the alloys were predicted by thermodynamic calculation and compared to the experimental results. It was found that addition of higher amount of excess silicon led to the formation of the evidently morphological Si phase, especially when the silicon content was beyond 1.35 wt.%. The Si phase was one of the dominant phases in the alloys and its reaction peak was identified with the onset temperature of 550.43oC in the DSC curves. These experimental results were in good agreement with the thermodynamic calculations by the Gulliver-Scheil model. Keywords: Al-Mg-Si-Cu alloy; morphology; thermodynamic calculation; excess Si

Light emission and structural properties of undoped and erbium-doped nanostructured silica with SnO 2 nanoparticles

2007 ◽  
Author(s):  
Sergio Brovelli ◽  
Norberto Chiodini ◽  
Alessandro Lauria ◽  
Francesco Meinardi ◽  
Angelo Monguzzi ◽  
...  
Keyword(s):  
Structural Properties ◽  
Light Emission ◽  
Erbium Doped ◽  
Nanostructured Silica

scholarly journals Emission Mechanisms of Si Nanocrystals and Defects in SiO2Materials

2014 ◽  
Vol 2014 ◽  
pp. 1-17 ◽  
Author(s):  
José Antonio Rodríguez ◽  
Marco Antonio Vásquez-Agustín ◽  
Alfredo Morales-Sánchez ◽  
Mariano Aceves-Mijares
Keyword(s):  
Silicon Dioxide ◽  
Point Defects ◽  
Silicon Content ◽  
Silicon Oxide ◽  
Light Emission ◽  
Light Emitting ◽  
Si Nanocrystals ◽  
The World ◽  
Silicon Materials ◽  
Silicon Silicon

Motivated by the necessity to have all silicon optoelectronic circuits, researchers around the world are working with light emitting silicon materials. Such materials are silicon dielectric compounds with silicon content altered, such as silicon oxide or nitride, enriched in different ways with Silicon. Silicon Rich Oxide or silicon dioxide enriched with silicon, and silicon rich nitride are without a doubt the most promising materials to reach this goal. Even though they are subjected to countless studies, the light emission phenomenon has not been completely clarified. So, a review of different proposals presented to understand the light emission phenomenon including emissions related to nanocrystals and to point defects in SiO2is presented.

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