Small Gold Nanoparticles as Crystallization “Catalysts”: Effect of Seed Size and Concentration on Au-ZnO Hetero Nanoparticles | Zendy

Joseph F. S. Fernando | Zendy; Matthew P. Shortell | Zendy; K. C. Ver | Zendy; Esa Jaatinen | Zendy; Eric R. Waclawik | Zendy

Open Access

Small Gold Nanoparticles as Crystallization “Catalysts”: Effect of Seed Size and Concentration on Au-ZnO Hetero Nanoparticles

Author(s) -

Joseph F. S. Fernando,

Matthew P. Shortell,

K. C. Ver,

Esa Jaatinen,

Eric R. Waclawik

Publication year - 2015

Publication title -

crystal growth and design

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.966

H-Index - 155

eISSN - 1528-7505

pISSN - 1528-7483

DOI - 10.1021/acs.cgd.5b00619

Subject(s) - nucleation , nanoparticle , crystallization , nanocrystal , materials science , chemical engineering , seed crystal , crystal growth , catalysis , nanotechnology , colloid , crystal (programming language) , crystallography , chemistry , single crystal , organic chemistry , engineering , programming language , computer science

This work reports the effect of seed nanoparticle size and concentration effects on heterogeneous crystal nucleation and growth in colloidal suspensions. We examined these effects in the Au nanoparticle-seeded growth of Au-ZnO hetero-nanocrystals under synthesis conditions that generate hexagonal, cone-shaped ZnO nanocrystals. It was observed that small (~ 4 nm) Au seed nanoparticles form one-to-one Au-ZnO hetero dimers and that Au nanoparticle seeds of this size can also act as crystallization ‘catalysts’ that readily promote the nucleation and growth of ZnO nanocrystals. Larger seed nanoparticles (~9 nm, ~ 11 nm) provided multiple, stable ZnO-nucleation sites, generating multi-crystalline hetero trimers, tetramers and oligomers

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