Heating-Induced Evolution of Thiolate-Encapsulated Gold Nanoparticles: A Strategy for Size and Shape Manipulations

摘要: A heating treatment strategy for inducing size and shape change of composite nanoparticles in solutions is described. The are ∼2 nm gold cores encapsulated with alkanethiolate monolayers. development abilities controls constitutes the motivation this work. We demonstrated a remarkable evolution preformed particles toward monodispersed larger core sizes well-defined highly faceted morphologies. thus evolved were thiolate shells, exhibited striking propensities forming long-range ordered arrays. morphological structural evolutions characterized using transmission electron microscopy, X-ray diffraction, UV−vis infrared spectroscopies. Although temperature-driven crystal growth known nonencapsulated particles, thiolate-encapsulated into morphologies represents an intriguing example temperature manipul...