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Synthesis and Characterization of Gold Nanostars as Filler of Tunneling Conductive Polymer Composites
Author(s) -
Stassi Stefano,
Cauda Valentina,
Canavese Giancarlo,
Manfredi Diego,
Pirri Candido Fabrizio
Publication year - 2012
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201101058
Subject(s) - chemistry , eutectic system , piezoresistive effect , composite material , conductive polymer , filler (materials) , nanoparticle , characterization (materials science) , polymer , electrical conductor , quantum tunnelling , nanotechnology , chemical engineering , materials science , crystallography , organic chemistry , microstructure , optoelectronics , engineering
Highly multibranched gold nanostars were obtained by a room‐temperature synthesis assisted by deep‐eutectic solvents (DES). The concentration of the ascorbate ions and the presence of water in the solution were found to both have a profound influence on branch formation. A growth mechanism of the nanostar is therefore proposed from the analysis of the particle dimensions, the aspect ratio of their protuberances, and the gold crystal size. These spiky nanoparticles would find an application as conductive filler in polymeric piezoresistive composites, based on a tunneling conduction mechanism.