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Vol. 146, No. 11, November 2012, pp. 59-68

 

Bullet

 

A Facile and Green Synthesis of Small Silver Nanoparticles in b–cyclodextrins Performing as Chemical Microreactors
and Capping Agents
 
a* Giorgio VENTIMIGLIA and b Alessandro MOTTA

a STMicroelectronics –- Analog. MEMS and Sensors- HealthCare Business Development Unit,  Stradale Primosole 50- 95121 – Catania, Italy

b INSTM – UdR di Catania - Dipartimento di Chimica,

viale A. Doria 6 – 95125 Catania, Italy

* Tel.: +390957404344, fax: +390957403031

Received: 31 July 2012   /Accepted: 23 November 2012   /Published: 30 November 2012

Digital Sensors and Sensor Sysstems

 

Abstract: Small silver nanoparticles were prepared by a facile and green synthesis based on a spontaneous decomposition of a commercial silver complex at room temperature, in a water solution of b-cyclodextrins acting either as micro-cavities, in which a thermal intramolecular reduction occurs, or as additives and capping agents for, respectively, the tuning of the dimensions and the stabilization of the silver nanoparticles, without using any poisoning. The silver nanoparticles were characterized by UV/VIS spectroscopy, Resonance Rayleigh Scanning (RRS) and transmission electron microscopy (TEM). TEM of the sample showed uniform and monodispersive particle distribution in the colloids, with dimension centered at about 5 nm and not over 10 nm, dispersed into the biologically and physiologically friendly b-cyclodextrin environment. For these reasons, the synthetic route reported in this work is very promising for both its simplicity and ability to produce silver nanoparticles with reduced dimensions and high stability.

 

Keywords: Silver nanoparticles, b-cyclodextrins, Raylegh resonance scattering, Transmission electron microscopy, UV plasmon, Sensing

 

 

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