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Evolution of size and shape of gold nanoparticles during long-time aging
Materials Chemistry and Physics Số 03-Feb, năm 2013 (Tập 138, trang 449-453)
DOI: 10.1016/j.matchemphys.2013.01.012
Tài liệu thuộc danh mục: ISI, Scopus
Mater Chem Phys
English
Từ khóa: Electron microscopy (STEM , TEM and SEM); Evolution of morphologies; Gold Nanoparticles; Long-time aging; Particle growth; Size and shape; Spherical morphologies; Triangular plates; Twin boundaries; Aging of materials; Crystal growth; Electron microscopy; Gold; Morphology; Nanostructures; Ostwald ripening; Metal nanoparticles
Tóm tắt tiếng anh
The evolution of size and shape of gold nanoparticles was studied during long-time aging. The initial particle size of 2-5 nm increased to about 25 nm in one year of storage. It was revealed that the main mechanism of particle growth is Ostwald ripening, however, fusion of particles was also observed. Additionally, while the initial particles have spherical morphology, the grown particles show various shapes such as sphere, bipyramid, decahedron, deca-tetrahedron, triangular plate and rod. Twin boundaries with large frequency of ∼5% were detected inside the particles which have an important effect on the evolution of morphology. This study suggests that aging may be a new way of tuning size and shape of gold nanoparticles. © 2013 Elsevier B.V. All rights reserved.
