Br-Assisted Ostwald Ripening of Au Nanoparticles under H2O2 Redox

2011 ◽  
Vol 12 (1) ◽  
pp. 37-39 ◽  
Author(s):  
Eunji Jang ◽  
Eun-Kyung Lim ◽  
Jihye Choi ◽  
Joseph Park ◽  
Yong-Jung Huh ◽  
...  
Keyword(s):  
Au Nanoparticles ◽  
Ostwald Ripening

Real-time atomistic simulation of the Ostwald ripening of TiO2 supported Au nanoparticles

Nanoscale ◽  
2020 ◽  
Vol 12 (37) ◽  
pp. 19142-19148 ◽  
Author(s):  
Beien Zhu ◽  
Rui Qi ◽  
Lina Yuan ◽  
Yi Gao
Keyword(s):  
Real Time ◽  
Atomistic Simulation ◽  
Au Nanoparticles ◽  
Ostwald Ripening ◽  
Atomic Simulation ◽  
Rate Determining Step ◽  
Changing Rate ◽  
Oswald Ripening

Atomic simulation shows a stagewise Oswald Ripening with changing rate-determining step. In the ripening, the particles exchange dimers among each other instead of monomers.

Simulation of Ostwald Ripening in Two Dimensions: Spatial and Nearest Neighbor Correlations

1995 ◽  
Vol 5 (9) ◽  
pp. 1143-1159 ◽  
Author(s):  
Norbert Masbaum
Keyword(s):  
Nearest Neighbor ◽  
Ostwald Ripening ◽  
Two Dimensions

Growth Kinetics of Quantum Size ZnO Particles

1998 ◽  
Vol 536 ◽  
Author(s):  
E. M. Wong ◽  
J. E. Bonevich ◽  
P. C. Searson
Keyword(s):  
Growth Kinetics ◽  
Ostwald Ripening ◽  
Chemical Potential ◽  
Colloidal Suspensions ◽  
Green Emission ◽  
Blue Shift ◽  
Constant Current ◽  
Mass Model ◽  
Zno Particles ◽  
Kinetics Of

AbstractColloidal chemistry techniques were used to synthesize ZnO particles in the nanometer size regime. The particle aging kinetics were determined by monitoring the optical band edge absorption and using the effective mass model to approximate the particle size as a function of time. We show that the growth kinetics of the ZnO particles follow the Lifshitz, Slyozov, Wagner theory for Ostwald ripening. In this model, the higher curvature and hence chemical potential of smaller particles provides a driving force for dissolution. The larger particles continue to grow by diffusion limited transport of species dissolved in solution. Thin films were fabricated by constant current electrophoretic deposition (EPD) of the ZnO quantum particles from these colloidal suspensions. All the films exhibited a blue shift relative to the characteristic green emission associated with bulk ZnO. The optical characteristics of the particles in the colloidal suspensions were found to translate to the films.

Machine Learning Accelerated Genetic Algorithms for Computational Materials Search

2018 ◽  
Author(s):  
Steen Lysgaard ◽  
Paul C. Jennings ◽  
Jens Strabo Hummelshøj ◽  
Thomas Bligaard ◽  
Tejs Vegge
Keyword(s):  
Machine Learning ◽  
Genetic Algorithm ◽  
Genetic Algorithms ◽  
Au Nanoparticles ◽  
Learning Model ◽  
Energy Calculations ◽  
Atomic Distribution ◽  
Machine Learning Model ◽  
Fold Reduction ◽  
Computational Materials

A machine learning model is used as a surrogate fitness evaluator in a genetic algorithm (GA) optimization of the atomic distribution of Pt-Au nanoparticles. The machine learning accelerated genetic algorithm (MLaGA) yields a 50-fold reduction of required energy calculations compared to a traditional GA.

Ostwald Ripening of the InAsSbP/InAs(100) Quantum Dots in the Framework of the Modified LSW Theory

2017 ◽  
Vol 9 (2) ◽  
pp. 02025-1-02025-6
Author(s):  
B. V. Ivanskii ◽  
◽  
R. D. Vengrenovich ◽  
V. I. Kryvetskyi ◽  
Yu. M. Kushnir ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Ostwald Ripening ◽  
Lsw Theory

The properties of ZnO nanorods modified by Au nanoparticles for galactose biosensor application

2018 ◽  
Vol 54(5) ◽  
pp. 81
Author(s):  
Ha, L.P.P. ◽  
Trung, T.Q. ◽  
Huy, H.D. ◽  
Tra, L.N.M.
Keyword(s):  
Au Nanoparticles ◽  
Zno Nanorods ◽  
Biosensor Application

scholarly journals Effect of Reaction Time on Microwave Absorption Properties of Fe3O4 Hollow Spheres Synthesized via Ostwald Ripening

Materials ◽  
2019 ◽  
Vol 12 (18) ◽  
pp. 2921 ◽  
Author(s):  
Wei Huang ◽  
Yujiang Wang ◽  
Shicheng Wei ◽  
Bo Wang ◽  
Yi Liang ◽  
...  
Keyword(s):  
Reaction Time ◽  
Microwave Absorption ◽  
Ostwald Ripening ◽  
Impedance Matching ◽  
Hollow Spheres ◽  
Absorption Properties ◽  
Microwave Absorption Properties ◽  
Magnetic Structures ◽  
Absorption Performance ◽  
Microwave Absorption Performance

Hollow magnetic structures have great potential to be used in the microwave absorbing field. Herein, Fe3O4 hollow spheres with different levels of hollowness were synthesized by the hydrothermal method under Ostwald ripening effect. In addition to their microstructures, the microwave absorption properties of such spheres were investigated. The results show that the grain size and hollowness of Fe3O4 hollow spheres both increase as the reaction time increases. With increasing hollowness, the attenuation ability of electromagnetic wave of Fe3O4 spheres increases first and then decreases, finally increases sharply after the spheres break down. Samples with strong attenuation ability can achieve good impedance matching, which it does preferentially as the absorber thickness increases. Fe3O4 hollow spheres show the best microwave absorption performance when the reaction time is 24 h. The minimum reflection loss (RL (min)) can reach −40 dB, while the thickness is only 3.2 mm.

scholarly journals Enhanced photocatalytic activity of plasmonic Au nanoparticles incorporated MoS2 nanosheets for degradation of organic dyes

2021 ◽  
Author(s):  
Anjali Rani ◽  
Arun Singh Patel ◽  
Anirban Chakraborti ◽  
Kulvinder Singh ◽  
Prianka Sharma
Keyword(s):  
Photocatalytic Activity ◽  
Au Nanoparticles ◽  
Organic Dyes ◽  
Mos2 Nanosheets

Selective enrichment and electrochemical determination of Cu in mushroom using L-Cysteine functionalized Fe3O4@Au nanoparticles

2021 ◽  
pp. 106148
Author(s):  
Dan Zhu ◽  
Yiwei Xu ◽  
Jiyong Shi ◽  
Xiaobo Zou ◽  
Wen Zhang ◽  
...  
Keyword(s):  
Au Nanoparticles ◽  
Electrochemical Determination ◽  
Selective Enrichment
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