scholarly journals Synthesis of Ar@C60 using molecular surgery

2020 ◽  
Vol 56 (72) ◽  
pp. 10521-10524 ◽  
Author(s):  
Sally Bloodworth ◽  
Gabriela Hoffman ◽  
Mark C. Walkey ◽  
George R. Bacanu ◽  
Julie M. Herniman ◽  
...  
Keyword(s):  
High Pressure ◽  
Noble Gas ◽  
Molecular Surgery ◽  
Key Steps

Synthesis of Ar@C60 is described, using a route in which high-pressure argon filling of an open-fullerene and photochemical desulfinylation are the key steps for >95% encapsulation of the noble gas.

A High Pressure Noble Gas Approach for WIMP Detection

2009 ◽  
Author(s):  
J. T. White ◽  
D. Nygren ◽  
W. Ooi ◽  
G. Salinas ◽  
H. Wang ◽  
...  
Keyword(s):  
High Pressure ◽  
Noble Gas

scholarly journals Constraints on Primordial Noble Gas Reservoir Deep in the Earth by High-Pressure and High-Temperature Experiments

2017 ◽  
Vol 27 (4) ◽  
pp. 266-277
Author(s):  
Hirochika SUMINO ◽  
Satoshi KISHI ◽  
Ryuichi NOMURA ◽  
Kenji MIBE ◽  
Shigehiko TATENO ◽  
...  
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Noble Gas ◽  
Gas Reservoir ◽  
The Earth

Solid krypton in MgO

1992 ◽  
Vol 7 (12) ◽  
pp. 3171-3174 ◽  
Author(s):  
M. Grant Norton ◽  
C. Barry Carter ◽  
Elizabeth L. Fleischer ◽  
James W. Mayer
Keyword(s):  
High Pressure ◽  
Electron Diffraction ◽  
Ion Implantation ◽  
Single Crystal ◽  
Magnesium Oxide ◽  
Room Temperature ◽  
Noble Gas ◽  
Lattice Parameter ◽  
Solid Krypton ◽  
Measured Lattice Parameter

Recent work by the authors has been extended to demonstrate the formation of solid krypton in single-crystal magnesium oxide. The solid inclusions, which were formed by ion implantation at room temperature, have been identified by electron diffraction. The formation of solid noble gas inclusions at room temperature indicates that they were under a high pressure. This pressure was determined, based on the measured lattice parameter, to be 1.7 GPa.

scholarly journals Pressure-induced transformation of CH3NH3PbI3: the role of the noble-gas pressure transmitting media

2019 ◽  
Vol 75 (3) ◽  
pp. 361-370 ◽  
Author(s):  
Alla Arakcheeva ◽  
Volodymyr Svitlyk ◽  
Eleonora Polini ◽  
Laura Henry ◽  
Dmitry Chernyshov ◽  
...  
Keyword(s):  
High Pressure ◽  
Energy Conversion ◽  
Structural Changes ◽  
Chemical Reactivity ◽  
Noble Gas ◽  
Threshold Level ◽  
Energy Conversion Efficiency ◽  
Ambient Conditions ◽  
Gaseous Media ◽  
Composition Structure

The photovoltaic perovskite, methylammonium lead triiodide [CH3NH3PbI3 (MAPbI3)], is one of the most efficient materials for solar energy conversion. Various kinds of chemical and physical modifications have been applied to MAPbI3 towards better understanding of the relation between composition, structure, electronic properties and energy conversion efficiency of this material. Pressure is a particularly useful tool, as it can substantially reduce the interatomic spacing in this relatively soft material and cause significant modifications to the electronic structure. Application of high pressure induces changes in the crystal symmetry up to a threshold level above which it leads to amorphization. Here, a detailed structural study of MAPbI3 at high hydrostatic pressures using Ne and Ar as pressure transmitting media is reported. Single-crystal X-ray diffraction experiments with synchrotron radiation at room temperature in the 0–20 GPa pressure range show that atoms of both gaseous media, Ne and Ar, are gradually incorporated into MAPbI3, thus leading to marked structural changes of the material. Specifically, Ne stabilizes the high-pressure phase of Ne x MAPbI3 and prevents amorphization up to 20 GPa. After releasing the pressure, the crystal has the composition of Ne0.97MAPbI3, which remains stable under ambient conditions. In contrast, above 2.4 GPa, Ar accelerates an irreversible amorphization. The distinct impacts of Ne and Ar are attributed to differences in their chemical reactivity under pressure inside the restricted space between the PbI6 octahedra.

Field emission excitation of a high pressure noble gas

2016 ◽  
Author(s):  
Nathaniel P. Lockwood ◽  
Greg A. Pitz ◽  
Steven B. Fairchild ◽  
Matthew A. Lange
Keyword(s):  
High Pressure ◽  
Field Emission ◽  
Noble Gas

scholarly journals High-pressure, high-temperature molecular doping of nanodiamond

2019 ◽  
Vol 5 (5) ◽  
pp. eaau6073 ◽  
Author(s):  
M. J. Crane ◽  
A. Petrone ◽  
R. A. Beck ◽  
M. B. Lim ◽  
X. Zhou ◽  
...  
Keyword(s):  
High Pressure ◽  
Ion Implantation ◽  
High Pressures ◽  
Noble Gas ◽  
Color Centers ◽  
Vacancy Defects ◽  
High Pressure High Temperature ◽  
Pressure Medium ◽  
Optical Pressure ◽  
Pressure Metrology

The development of color centers in diamond as the basis for emerging quantum technologies has been limited by the need for ion implantation to create the appropriate defects. We present a versatile method to dope diamond without ion implantation by synthesis of a doped amorphous carbon precursor and transformation at high temperatures and high pressures. To explore this bottom-up method for color center generation, we rationally create silicon vacancy defects in nanodiamond and investigate them for optical pressure metrology. In addition, we show that this process can generate noble gas defects within diamond from the typically inactive argon pressure medium, which may explain the hysteresis effects observed in other high-pressure experiments and the presence of noble gases in some meteoritic nanodiamonds. Our results illustrate a general method to produce color centers in diamond and may enable the controlled generation of designer defects.

scholarly journals Solubility of Noble Gas in SiO2 Melt under High Pressure

2008 ◽  
Vol 18 (1) ◽  
pp. 44-54
Author(s):  
Ken NIWA ◽  
Takehiko YAGI ◽  
Chie MIYAKAWA ◽  
Jun-ichi MATSUDA
Keyword(s):  
High Pressure ◽  
Noble Gas
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