Ostwald ripening of binary alloy particles

被引:14
作者
Burlakov, V. M. [1 ,2 ]
Kantorovich, L. [3 ]
机构
[1] Univ Oxford, Dept Mat, Oxford OX1 3PH, England
[2] Russian Acad Sci, Inst Spect, Troitsk 142190, Moscow Region, Russia
[3] Kings Coll London, Dept Phys, London WC2R 2LS, England
关键词
MAGNETIC-PROPERTIES; PHASE; NANOPARTICLES; OXIDATION; CATALYSTS; GROWTH; MODEL;
D O I
10.1063/1.3530287
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Classical Lifshitz-Slyozov-Wagner theory is generalized for Ostwald ripening of particles composed of random binary alloy. We show that the steady state ripening process is characterized by self-similar particle size and composition distributions. The shape of particle size distribution depends on whether the process is diffusion controlled (Lifshitz-Slyozov) or reaction controlled (Wagner) and is consistent with the predictions of classical theory for one-component materials. The steady state composition distribution, in contrast, has the same functional form in both extreme cases featuring a universal dependence of the composition upon particle size. We also found that transients in particle's composition can be very quick resulting in a steady state distribution well before it is reached by particles sizes. These transients involve significant changes in particle sizes and open an opportunity for producing metastable particle size distributions of required shape. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3530287]
引用
收藏
页数:7
相关论文
共 22 条
[1]  
[Anonymous], MOL THEORY CAPILLARI
[2]  
[Anonymous], EUR J PHYS, DOI [DOI 10.1088/0143-0807/21/6/314, 10.1088/0143-0807/21/6/314]
[3]   A general approach to synthesis of nanoparticles with controlled morphologies and magnetic properties [J].
Bao, Y ;
Pakhomov, AB ;
Krishnan, KM .
JOURNAL OF APPLIED PHYSICS, 2005, 97 (10)
[4]   LAMELLAR PHASE IN A MODEL FOR BLOCK COPOLYMERS [J].
CHAKRABARTI, A ;
GUNTON, JD .
PHYSICAL REVIEW E, 1993, 47 (02) :R792-R795
[5]   Polyol-process-derived CoPt nanoparticles: Structural and magnetic properties [J].
Chinnasamy, CN ;
Jeyadevan, B ;
Shinoda, K ;
Tohji, K .
JOURNAL OF APPLIED PHYSICS, 2003, 93 (10) :7583-7585
[6]  
DOMB C, 1972, PHASE TRANSITION CRI
[7]  
DRANSFIELD GP, 1989, SCIENCE, V1, P275
[8]  
FAUCHAIS P, 1983, TOP CURR CHEM, V107, P59
[9]   Preparation of porous carbon spheres dispersed with Pd-Ag alloy nanoparticles [J].
Horigome, Masataka ;
Tanaka, David A. Pacheco ;
Tanco, Margot A. Llosa ;
Yukita, Waki ;
Ishii, Ryo ;
Kobayashi, Kiyoshi ;
Mizukami, Fujio ;
Suzuki, Toshishige M. .
CHEMISTRY LETTERS, 2007, 36 (01) :152-153
[10]  
LIFSHITZ IM, 1959, SOV PHYS JETP-USSR, V8, P331