Control of photophysical and photochemistry of colloidal quantum dots via metal and metal-oxide coated substrates

S. M. Sadeghi; A. Nejat

doi:10.1117/12.2005764

29 March 2013 Control of photophysical and photochemistry of colloidal quantum dots via metal and metal-oxide coated substrates

S. M. Sadeghi, A. Nejat

Author Affiliations +

Proceedings Volume 8634, Quantum Dots and Nanostructures: Synthesis, Characterization, and Modeling X; 86340L (2013) https://doi.org/10.1117/12.2005764
Event: SPIE OPTO, 2013, San Francisco, California, United States

Abstract

We studied how deposition of a very thin layer of gold or chromium oxide on glass substrates can modify the way irradiation changes the fluorescence of CdSe/ZnS quantum dots. We found that the gold layer tends to shield the quantum dots from the substrate, preventing photoinduced fluorescence enhancement caused by the Coulomb blockage. In this case the emission of the quantum dots did not show also any broadening but rather a slight red shift, independent of the irradiation time. In the case of the chromium-oxide coated substrates we observed significant broadening and blue shift, indicating such oxide could enhance photo-oxidation of colloidal quantum dots significantly.

Citation Download Citation

S. M. Sadeghi and A. Nejat "Control of photophysical and photochemistry of colloidal quantum dots via metal and metal-oxide coated substrates", Proc. SPIE 8634, Quantum Dots and Nanostructures: Synthesis, Characterization, and Modeling X, 86340L (29 March 2013); https://doi.org/10.1117/12.2005764

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