Controllable growth of silver-seeded PbS nanostructures

Li, Yan; Du, Feifei; Zhang, Hua; Du, Xin; Zhu, Jian; Zhong, Xinhua

doi:10.1007/s10853-010-4789-5

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2014

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“…[19,[24][25][26][27] Another way to control the shape is the addition of noble metal particles as seeds to the reaction volume. Li et al [28] used silver seeds to control the growth of PbS NPs to form spheres, cubes, and rods and Yong et al [29] used gold seeds to control the size and shape of PbS nanowires. Thus, simple and inexpensive synthetic routes to control the shape of PbS NPs are desirable.…”

Section: Introductionmentioning

confidence: 99%

Sculpting of Lead Sulfide Nanoparticles by Means of Acetic Acid and Dichloroethane

Gerdes¹,

Volkmann²,

Schliehe³

et al. 2014

Zeitschrift Für Physikalische Chemie

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Abstract:Colloidal lead sulfide is a versatile material with great opportunities to tune the bandgap by electronic confinement and to adapt the optical and electrical properties to the target application. We present a new and simple synthetic route to control size and shape of PbS nanoparticles. Increasing concentrations of explicitly added acetic acid are used to tune the shape of PbS nanoparticles from quasi-spherical particles via octahedrons to six-armed stars. The presence of acetate changes the intrinsic surface energies of the different crystal facets and enables the growth along the ⟨100⟩ direction. Furthermore, the presence of 1,2-dichloroethane alters the reaction kinetics, which results in smaller nanoparticles with a narrower size distribution.

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