In situ kinetic investigations during aluminium nitride purification and crystal growth processes by capillary coupled mass spectrometry

2011 ◽  
Vol 526 (1-2) ◽  
pp. 213-221 ◽  
Author(s):  
C. Guguschev ◽  
E. Moukhina ◽  
J. Wollweber ◽  
A. Dittmar ◽  
K. Böttcher ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Crystal Growth ◽  
Aluminium Nitride ◽  
Growth Processes ◽  
Kinetic Investigations

IN-SITU DIAGNOSIS AND CONTROL OF CRYSTAL GROWTH PROCESS BY MEANS OF ELECTRIC POTENTIALS

2002 ◽  
Vol 16 (28n29) ◽  
pp. 4373-4379
Author(s):  
E. G. TSVETKOV ◽  
V. I. TYURIKOV
Keyword(s):  
Crystal Growth ◽  
Crystallization Rate ◽  
Growth Period ◽  
Double Electric Layer ◽  
Temperature Phase ◽  
Growth Processes ◽  
Electric Potentials ◽  
The Difference ◽  
Current Monitoring

The paper discussed a possibility of using new approaches for in-situ diagnosis growth processes of large crystals as well as solving some specific problems of controlling them. They are based on the current monitoring of changes in the differences of electric potential between growing crystals and crystallization medium. It is obvious that this monitoring reflects such important crystallization processes as accumulation of charge at the crystal interface and electric screening of it, growth of concentration of subphase formation at the interface (later, inclusions), current change in the mass crystallization rate, etc. This change in the rate suggests a new concept of automation of crystal growth processes, based on minimization of the difference in the current and initially predetermined change in Δϕ through inversely-related adjustment of the temperature of crystallization medium. We have experimentally substantiated the possibility of using various outer electric potentials for modification of processes in a double electric layer at the interface and extension of growth period under fairly favorable conditions. The system of low-temperature phase of barium metaborate crystal and molten solution as crystallization medium was taken for a model one.

Visualization of halide perovskite crystal growth processes by in situ heating WAXS measurements

2021 ◽  
Author(s):  
Yuiga Nakamura ◽  
Naoyuki Shibayama ◽  
Kunihisa Sugimoto
Keyword(s):  
Crystal Growth ◽  
Growth Processes ◽  
Perovskite Crystal ◽  
Crystallization Dynamics ◽  
In Situ Heating ◽  
Halide Perovskite

We observed the crystallization dynamics of halide perovskite crystals (CH3NH3PbI3) by in situ heating WAXS measurements.

scholarly journals Crystal Growth Behaviors of Silicon during Melt Growth Processes

2012 ◽  
Vol 2012 ◽  
pp. 1-16 ◽  
Author(s):  
Kozo Fujiwara
Keyword(s):  
Solar Cells ◽  
Crystal Growth ◽  
Growth Mechanisms ◽  
Morphological Transformation ◽  
Growth Processes ◽  
Melt Growth ◽  
Fine Control ◽  
Faceted Dendrite

It is imperative to improve the crystal quality of Si multicrystal ingots grown by casting because they are widely used for solar cells in the present and will probably expand their use in the future. Fine control of macro- and microstructures, grain size, grain orientation, grain boundaries, dislocation/subgrain boundaries, and impurities, in a Si multicrystal ingot, is therefore necessary. Understanding crystal growth mechanisms in melt growth processes is thus crucial for developing a good technology for producing high-quality Si multicrystal ingots for solar cells. In this review, crystal growth mechanisms involving the morphological transformation of the crystal-melt interface, grain boundary formation, parallel-twin formation, and faceted dendrite growth are discussed on the basis of the experimental results of in situ observations.

Single Crystal Growth of High-Pressure Phases of Ice and Salt Hydrate Far Below the Original Melting Point by Mixing Alcohol: Crystal Structure Determination of Magnesium Chloride Heptahydrate

2020 ◽  
Author(s):  
Keishiro Yamashita ◽  
Kazuki Komatsu ◽  
Hiroyuki Kagi
Keyword(s):  
Crystal Structure ◽  
High Pressure ◽  
Crystal Growth ◽  
Single Crystal ◽  
Room Temperature ◽  
Growth Technique ◽  
Salt Hydrate ◽  
X Ray

An crystal-growth technique for single crystal x-ray structure analysis of high-pressure forms of hydrogen-bonded crystals is proposed. We used alcohol mixture (methanol: ethanol = 4:1 in volumetric ratio), which is a widely used pressure transmitting medium, inhibiting the nucleation and growth of unwanted crystals. In this paper, two kinds of single crystals which have not been obtained using a conventional experimental technique were obtained using this technique: ice VI at 1.99 GPa and MgCl<sub>2</sub>·7H<sub>2</sub>O at 2.50 GPa at room temperature. Here we first report the crystal structure of MgCl2·7H2O. This technique simultaneously meets the requirement of hydrostaticity for high-pressure experiments and has feasibility for further in-situ measurements.

Optics-Free Visualization of Proteins in Single Cells by Time of Flight-Secondary Ion Mass Spectrometry Coupled with Genetically Encoded Chemical Tags

2020 ◽  
Author(s):  
Feifei Jia ◽  
Jie Wang ◽  
Yanyan Zhang ◽  
Qun Luo ◽  
Luyu Qi ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Secondary Ion Mass Spectrometry ◽  
Single Cells ◽  
Time Of Flight ◽  
E Coli ◽  
Tof Sims ◽  
Ion Mass Spectrometry ◽  
Chemical Tags ◽  
Secondary Ion

<p></p><p><i>In situ</i> visualization of proteins of interest at single cell level is attractive in cell biology, molecular biology and biomedicine, which usually involves photon, electron or X-ray based imaging methods. Herein, we report an optics-free strategy that images a specific protein in single cells by time of flight-secondary ion mass spectrometry (ToF-SIMS) following genetic incorporation of fluorine-containing unnatural amino acids as a chemical tag into the protein via genetic code expansion technique. The method was developed and validated by imaging GFP in E. coli and human HeLa cancer cells, and then utilized to visualize the distribution of chemotaxis protein CheA in E. coli cells and the interaction between high mobility group box 1 protein and cisplatin damaged DNA in HeLa cells. The present work highlights the power of ToF-SIMS imaging combined with genetically encoded chemical tags for <i>in situ </i>visualization of proteins of interest as well as the interactions between proteins and drugs or drug damaged DNA in single cells.</p><p></p>

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