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Enhanced growth of tellurium nanowires under conditions of macromolecular crowding.

著者 Hunyadi M , Gácsi Z , Csarnovics I , Csige L , Csik A , Daróczi L , Huszánk R , Szűcs Z
Phys Chem Chem Phys.2017 Jun 28 ; 19(25):16477-16484.
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An unprecedented rate enhancement was observed in the wet-chemical synthesis of tellurium nanowires under crowded conditions of inert macromolecules. The synthesis was carried out at 105 °C using solutions of sodium tellurite (NaTeO) as a precursor, hydrazine (NH) as a reducing agent, and polyvinylpyrrolidone (PVP) as both a stabilizing and crowding agent. The PVP concentration was systematically varied between the dilute and crowding regimes up to 166 g l. The growth of the nanowires was monitored by measuring their size-dependent optical properties in the UV-Vis spectrum characterizing the size and morphology evolution of the nanowires and a coexisting phase of amorphous tellurium nanoparticles. The observed growth characteristics were interpreted in terms of non-specific structural organization of the crowded media due to the entropic-driven effects of space compartmentalization.
PMID: 28608881 [PubMed]
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