Room-Temperature Interaction of Nitrogen Dioxide with Rhodium Nanoparticles Supported on the Surface of Highly Oriented Pyrolytic Graphite (HOPG)

2021 ◽  
Vol 62 (5) ◽  
pp. 664-674
Author(s):  
M. Yu. Smirnov ◽  
A. V. Kalinkin ◽  
A. N. Salanov ◽  
A. M. Sorokin ◽  
V. I. Bukhtiyarov
Keyword(s):  
Nitrogen Dioxide ◽  
Room Temperature ◽  
Pyrolytic Graphite ◽  
Highly Oriented Pyrolytic Graphite ◽  
Rhodium Nanoparticles ◽  
Temperature Interaction

High Temperature Implantation in Graphite

1983 ◽  
Vol 27 ◽  
Author(s):  
G. Braunstein ◽  
B.S. Elman ◽  
M.S. Dresselhaus ◽  
G. Dresselhaus ◽  
T. Venkatesan
Keyword(s):  
High Temperature ◽  
Radiation Damage ◽  
High Temperatures ◽  
Room Temperature ◽  
Pyrolytic Graphite ◽  
Rutherford Backscattering ◽  
The Other ◽  
Highly Oriented Pyrolytic Graphite ◽  
Graphite Lattice ◽  
Partial Annealing

ABSTRACTIn previous studies it was found that when highly oriented pyrolytic graphite (HOPG) is implanted at room temperature, the damage caused by the implantation could be completely annealed by heating the sample to temperatures higher than ∼ 2500°C. However at these high temperatures, the implanted species was found to diffuse out of the sample, as evidenced by the disappearance of the impurity peak in the Rutherford backscattering (RBS) spectrum. If, on the other hand, the HOPG crystal was held at a high temperature (≥ 600°C) during the implantation, partial annealing could be observed. The present work further shows that it is possible to anneal the radiation damage and simultaneously to retain the implants in the graphite lattice by means of high temperature implantation (Ti ≥ 450°C) followed by annealing at 2300°C.

scholarly journals Hydrogenation of HOPG-supported Gold Nanoparticles: Features of Initial Stages

Crystals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 350
Author(s):  
Andrey K. Gatin ◽  
Maxim V. Grishin ◽  
Nadezhda V. Dokhlikova ◽  
Sergey Yu. Sarvadii ◽  
Boris R. Shub
Keyword(s):  
Experimental Data ◽  
Gold Nanoparticles ◽  
Simple Model ◽  
Quantum Chemical ◽  
Room Temperature ◽  
Pyrolytic Graphite ◽  
Highly Oriented Pyrolytic Graphite ◽  
Entire Surface ◽  
Supported Gold Nanoparticles ◽  
Supported Gold

The features of deuterium adsorption on the surface of gold nanoparticles deposited on highly oriented pyrolytic graphite (HOPG) were determined. The results showed that deuterium adsorption on gold nanoparticles takes place at room temperature. The results also showed that the filling of the nanoparticles’ surfaces with the adsorbate occurs from the graphite–gold interface until the entire surface is covered by deuterium. The results of quantum chemical simulations are used to explain the experimental data. A simple model of the observed effects is proposed.

Formation and self-organization of nanometer-scale Au particles on graphite by vacuum deposition in iodine vapor

1999 ◽  
Vol 14 (3) ◽  
pp. 968-974
Author(s):  
Katsuya Honda ◽  
Nobusuke Yamada ◽  
Masahito Sano ◽  
Susumu Yoshimura
Keyword(s):  
Room Temperature ◽  
Pyrolytic Graphite ◽  
Self Organization ◽  
Nanometer Scale ◽  
Iodine Vapor ◽  
Highly Oriented Pyrolytic Graphite ◽  
Uniform Size ◽  
The Mean ◽  
Iodine Adsorption ◽  
Uniform Size Distribution

Vacuum depositions of Au on highly oriented pyrolytic graphite (HOPG) and SiO2 substrates in iodine vapor of 1 × 10–4 Torr give rise to formation of dispersed nanoscale Au particles at room temperature. The iodine is physisorbed on the Au surface and prevents the Au particles from coalescing. The mean diameter of Au particles on highly oriented pyrolytic graphite (HOPG) is about 40 nm, which is larger than that on SiO2 The particles on HOPG have a narrower and more uniform size distribution than those on SiO2. Radial distribution function of the particles on HOPG showed many well-defined peaks, whereas that on SiO2 had only one peak, indicating highly structured deposition on HOPG by iodine adsorption.

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