Transition from Nanoparticles to Nanoclusters: Microscopic and Spectroscopic Investigation of Size-Dependent Physicochemical Properties of Polyamine-Functionalized Silver Nanoclusters

In this paper, an interesting process is described in the synthesis of silver nanoclusters capped by hyperbranched polyethyleneimine: a transition from nanoparticles to nanoclusters takes place spontaneously over time accompanied with the reappearance of size-dependent physicochemical properties of silver nanoclusters

Fei Qu; Nian Bing Li; Hong Qun Luo

2013

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  • In this paper, an interesting process is described in the synthesis of silver nanoclusters capped by hyperbranched polyethyleneimine: a transition from nanoparticles to nanoclusters takes place spontaneously over time accompanied with the reappearance of size-dependent physicochemical properties of silver nanoclusters
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  • An interesting process is described in the synthesis of silver nanoclusters capped by hyperbranched polyethyleneimine: a transition from nanoparticles to nanoclusters takes place spontaneously over time accompanied with the reappearance of size-dependent physicochemical properties of silver nanoclusters
  • As PEI-capped Ag particles were prepared by a heating process at 90 °C for 10 min and a cooling process to ambient temperature, the average diameter changed from 5.3 nm after 24 h to 3.9 nm 168 h later, and the percentage of the particles of 1.0–2.0 nm increased significantly over 168 h
  • This work clearly exhibits the reappearance of size-dependent physicochemical properties of silver nanoclusters with size reduction in the range where the transition from metallic to molecular behavior takes place
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