SiO2 coatings on glass containing copper colloids using the sol-gel technique

Martin Mennig; Mike Schmitt; Bernd Kutsch; Helmut K. Schmidt

doi:10.1117/12.188942

13 October 1994 SiO₂ coatings on glass containing copper colloids using the sol-gel technique

Martin Mennig, Mike Schmitt, Bernd Kutsch, Helmut K. Schmidt

Proceedings Volume 2288, Sol-Gel Optics III; (1994) https://doi.org/10.1117/12.188942
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

Abstract

A sol-gel method for the preparation of transparent copper nano particle-containing SiO₂ coatings on glass has been developed. The sol is synthesized from alkoxysilanes and tetra ethyl orthosilicate with copper ammine complexes, prepared from Cu²⁺ salts and amino alkoxy silanes. Glass substrates are coated by dipping and layers up to 1 micrometers in thickness are obtained after thermal densification at temperatures between 200 degree(s) - 500 degree(s)C. The Cu colloid formation can be achieved using a reducing atmosphere during densification. Thus reddish-brown colored coatings on glass with optical densities between 0.5 and 2 are obtained. Under ambient air the color turns from reddish-brown to dark green. This process is reversible and by re-heating under reducing conditions the reddish-brown color can be re- established. UV-VIS absorbance measurements and structural investigations by WAXS, TEM, ESCA and SNMS show that the green color is due to an oxide layer at the colloidal interface.

Citation Download Citation

Martin Mennig, Mike Schmitt, Bernd Kutsch, and Helmut K. Schmidt "SiO₂ coatings on glass containing copper colloids using the sol-gel technique", Proc. SPIE 2288, Sol-Gel Optics III, (13 October 1994); https://doi.org/10.1117/12.188942

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available