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Ito T, Hosokawa H, Kawasaki T, Ishizawa Y, Inaba K, Hatakeyama N, Miyamoto A. Development of a method to lower recontamination after chemical decontamination by depositing Pt nano particles: (II) consideration of the Pt effect on oxide composition. J NUCL SCI TECHNOL 2016. [DOI: 10.1080/00223131.2016.1262296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Suzuki A, Bonnaud P, Williams MC, Selvam P, Aoki N, Miyano M, Miyamoto A, Saito JI, Ara K. Effect of the Titanium Nanoparticle on the Quantum Chemical Characterization of the Liquid Sodium Nanofluid. J Phys Chem B 2016; 120:3527-39. [PMID: 27008416 DOI: 10.1021/acs.jpcb.5b11461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Suspension state of a titanium nanoparticle in the liquid sodium was quantum chemically characterized by comparing physical characteristics, viz., electronic state, viscosity, and surface tension, with those of liquid sodium. The exterior titanium atoms on the topmost facet of the nanoparticle were found to constitute a stable Na-Ti layer, and the Brownian motion of a titanium nanoparticle could be seen in tandem with the surrounding sodium atoms. An electrochemical gradient due to the differences in electronegativity of both titanium and sodium causes electron flow from liquid sodium atoms to a titanium nanoparticle, Ti + Na → Ti(δ-) + Na(δ+), making the exothermic reaction possible. In other words, the titanium nanoparticle takes a role as electron-reservoir by withdrawing free electrons from sodium atoms and makes liquid sodium electropositive. The remaining electrons in the liquid sodium still make Na-Na bonds and become more stabilized. With increasing size of the titanium nanoparticle, the deeper electrostatic potential, the steeper electric field, and the larger Debye atmosphere are created in the electric double layer shell. Owing to electropositive sodium-to-sodium electrostatic repulsion between the external shells, naked titanium nanoparticles cannot approach each other, thus preventing the agglomeration.
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Affiliation(s)
- Ai Suzuki
- New Industry Creation Hatchery Center (NICHe), Tohoku University , 6-6-10, Aramaki, Aoba ku, Sendai 980-8579, Japan
| | - Patrick Bonnaud
- New Industry Creation Hatchery Center (NICHe), Tohoku University , 6-6-10, Aramaki, Aoba ku, Sendai 980-8579, Japan
| | - Mark C Williams
- New Industry Creation Hatchery Center (NICHe), Tohoku University , 6-6-10, Aramaki, Aoba ku, Sendai 980-8579, Japan.,AECOM Technology Corporation, Morgantown, West Virginia 26501, United States
| | - Parasuraman Selvam
- New Industry Creation Hatchery Center (NICHe), Tohoku University , 6-6-10, Aramaki, Aoba ku, Sendai 980-8579, Japan.,National Centre for Catalysis Research (NCCR) and Department of Chemistry, Indian Institute of Technology-Madras , Chennai 600 036, India
| | - Nobutoshi Aoki
- New Industry Creation Hatchery Center (NICHe), Tohoku University , 6-6-10, Aramaki, Aoba ku, Sendai 980-8579, Japan
| | - Masayuki Miyano
- New Industry Creation Hatchery Center (NICHe), Tohoku University , 6-6-10, Aramaki, Aoba ku, Sendai 980-8579, Japan
| | - Akira Miyamoto
- New Industry Creation Hatchery Center (NICHe), Tohoku University , 6-6-10, Aramaki, Aoba ku, Sendai 980-8579, Japan
| | - Jun-ichi Saito
- Japan Atomic Energy Agency (JAEA), 4002 Narita, Oarai-machi, Ibaraki 311-1393, Japan
| | - Kuniaki Ara
- Japan Atomic Energy Agency (JAEA), 4002 Narita, Oarai-machi, Ibaraki 311-1393, Japan
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SUZUKI A, WILLIAMS MC, INABA K, SATO R, OKUSHI K, MIURA R, HATAKEYAMA N, MIYAMOTO A. Development of Three Dimensional Kinetic Monte Carlo (3D-KMC) Grain Growth Simulator Based on Tight Binding Quantum Chemical Molecular Dynamics and Its Application to the Analysis of Thermal Grain Growth of CeO2 and Rh/CeO2. JOURNAL OF COMPUTER CHEMISTRY-JAPAN 2013. [DOI: 10.2477/jccj.2012-0008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Ahmed F, Alam MK, Miura R, Suzuki A, Tsuboi H, Hatakeyama N, Endou A, Takaba H, Kubo M, Miyamoto A. Modeling of hydrogen vacancy for dissociative adsorption of H2 on Pd (111) surface by a quantum chemical molecular dynamics. Catal Today 2011. [DOI: 10.1016/j.cattod.2010.10.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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