Abstract

In this work a genuine combination of a bottom-up approach, which is based on synthesis andfunctionalization of emitting nanocrystals (NCs), with a top-down strategy, which relies on aflexible and versatile cold plasma process, is shown. Luminescent semiconducting colloidalNCs consisting of a CdSe core coated with a ZnS shell (CdSe@ZnS) are directly assembledonto micro-patterned substrates previously functionalized by means of glow dischargesperformed through physical masks. The NC assembly is driven by electrostatic interactionsthat led to their successful organization into spatially resolved domains. Two distinct protocolsare tested, the former using a plasma deposition process combined with an electrostaticlayer-by-layer procedure, the latter based on a two-step plasma deposition/treatment process.The procedures are thoroughly monitored with fluorescence microscopy, atomic forcemicroscopy, x-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy,transmission electron microscopy and scanning electron microscopy. The two-step plasmaprotocol is demonstrated to be more efficient in directing a uniform and specific assembly ofluminescent NCs with respect to the hybrid procedure. The presented 'mix and match'approach offers great potential for integrating NCs, with their unique size-dependentproperties, into microstructures, providing a universal platform for the fabrication of sensors,biochips, displays and switches.

Autore Pugliese

• Sardella Eloisa , Striccoli Marinella , Depalo Nicoletta , Comparelli Roberto

Tutti gli autori

• E Sardella; F Liuzzi; R Comparelli; N Depalo; M Striccoli; A Agostiano; P Favia; M L Curri

Titolo volume/Rivista

Nanotechnology

Anno di pubblicazione

2013

ISSN

0957-4484

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

Non Disponibile

Numero di citazioni Scopus

Non Disponibile

Ultimo Aggiornamento Citazioni

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Settori ERC

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Codici ASJC

Non Disponibile