Hydrophilization parameters influencing the properties of shelled alloyed QDs

Alexander S. Moshkov; Svetlana A. Mescheryakova; Pavel D. Strokin; Daniil D. Drozd; Irina Yu. Goryacheva; Olga A. Goryacheva

doi:10.1117/12.2626340

29 April 2022 Hydrophilization parameters influencing the properties of shelled alloyed QDs

Alexander S. Moshkov, Svetlana A. Mescheryakova, Pavel D. Strokin, Daniil D. Drozd, Irina Yu. Goryacheva, Olga A. Goryacheva

Author Affiliations +

Proceedings Volume 12194, Computational Biophysics and Nanobiophotonics; 121941A (2022) https://doi.org/10.1117/12.2626340
Event: XXV Annual Conference Saratov Fall Meeting 2021; and IX Symposium on Optics and Biophotonics, 2021, Saratov, Russian Federation

Abstract

Quantum dots (QDs) are modern nanoparticles with a wide potential for use in medicine, bioanalysis, as well as in optics and energetics. Different types of QDs can be produced depending on their synthesis method. QDs formed by semiconductor components able to mutual solid-solution formation named alloyed. This type of QDs has a high quantum yield and narrow emission peak but less chemical stability relative to core-shell type QDs. Better core-shell QDs stability explains by the additional surface shell covering. This approach can be applied to the alloyed QDs also. One-step hightemperature organometallic procedure is excellent in this regard due to its simplicity and consistency in the synthesis. However, QDs which obtained in this way are hydrophobic and do not dissolve in polar solutions such as water. Hydrophilization is used to convert QDs from a hydrophobic to a hydrophilic state. It was found that when hydrophilizing with β-mercaptoethanol, the quantum yield (QY) significantly increases, although when hydrophilizing with other ligands, it is just a decrease in the quantum yield that appears. This article investigates the process of hydrophilization of core-shell alloyed QDs in which an increase in QY is observed. For this, the effect on the optical properties of the amount of the hydrophilizing agent, long-term storage at room and low temperatures, and the effect of pH on hydrophilized QDs are considered.

Citation Download Citation

Alexander S. Moshkov, Svetlana A. Mescheryakova, Pavel D. Strokin, Daniil D. Drozd, Irina Yu. Goryacheva, and Olga A. Goryacheva "Hydrophilization parameters influencing the properties of shelled alloyed QDs", Proc. SPIE 12194, Computational Biophysics and Nanobiophotonics, 121941A (29 April 2022); https://doi.org/10.1117/12.2626340

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
7 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Luminescence

Quantum efficiency

Nanoparticles

Absorbance

Nanocrystals

Quantum dots

Semiconductors

Keywords/Phrases

Search In:

Publication Years