Purification non-aqueous solution of quantum dots CdSe- CdS-ZnS from excess organic substance-stabilizer by use PE- HD membrane

2nd International School and Conference Saint-Petersburg OPEN on Optoelectronics, Photonics, Engineering and Nanostructures

Kosolapova, K.^1 ; Al-Alwani, A.^2 ; Gorbachev, I.^2,3 ; Glukhovskoy, E.^2

Faculty of Nano- and Biomedical Technologies, Saratov State University, Russia^1

Department of Educational and Research Institute of Nanostructures and Biosystems, Saratov State University, Russia^2

Department of Colloids and Interfaces, Max Planck Institute of Colloids and Interfaces, Germany^3

关键词: Filtration process;    Langmuir Blodgett techniques;    Langmuir monolayers;    Membrane filtrations;    Nonaqueous solutions;    Organic substances;    Surface pressure area isotherms;    Surface pressures;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/643/1/012084/pdf
DOI  :  10.1088/1742-6596/643/1/012084

来源: IOP

【 摘 要 】

Recently, a new simple method for the purification of CdSe-CdS-ZnS quantum dots by using membrane filtration, the filtration process, successfully separated the oleic acid from quantum dots through membranes purification after synthesis; purification of quantum dots is a very significant part of post synthetical treatment that determines the properties of the material. We explore the possibilities of the Langmuir-Blodgett technique to make such layers, using quantum dots as a model system. The Langmuir monolayer of quantum dots were then investigated the surface pressure-area isotherm. From isotherm, we found the surface pressure monolayer changed with time.