Title

Formation And Dissolution Of Copper-Based Nanoparticles In Sio2 Sol-Gel Film Using Heat Treatment And/Or Uv Light Exposure

Keywords

A. Optical materials; A. Thin films; B. Sol-gel chemistry; D. Color centers; D. Optical properties

Abstract

We report in this paper, results on the formation and dissolution of Cu-based nanoparticles in sol-gel SiO2 thin films using heat treatment and UV light exposure, respectively. Using UV-vis-NIR spectroscopy, we have shown that Cu2O nanoparticles can be generated by controlling the aging of the sol prior to film deposition while the Cu0 nanoparticles can be synthesized using a heat treatment in H2 atmosphere at 550 °C for 6 h. It has been also demonstrated that irradiation with an UV pulsed (Q-switched Nd:YAG) or continuous black ray UV lamp can dissolve these Cu-based nanoparticles with controlled, spatial selectivity. The mechanism of the dissolution process was found to be mainly thermal. Finally, we report a new analytical technique for detecting/confirming the presence of low densities of Cu nanoparticles in the films, based on a relative heat flow measurement of such films using a micro-thermal analyzer (e.g., TA Instruments μTA model 2990). © 2007 Elsevier Ltd. All rights reserved.

Publication Date

11-3-2008

Publication Title

Materials Research Bulletin

Volume

43

Issue

11

Number of Pages

3130-3139

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.materresbull.2007.11.007

Socpus ID

51649119337 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/51649119337

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