Low-temperature synthesis of polyethyleneimine-entrapped CdS quantum dots
- This Letter is focused on the one-pot formation of CdS nanoparticles in aqueous medium in presence of polyethyleneimine (PEI). Quantum dots can be obtained by adding a pre-cooled aqueous Na2S solution to a pre-cooled aqueous CdCl2 solution dropwise in presence of PEI. Field flow fractionation in combination with TEM experiments show a time dependent agglomeration of individual quantum dots from 1.6 nm up to 3.2 nm in size. The hyperbranched PEI of moderate molar mass (>20000 g/mol) is an excellent polymer to prevent a further increase of the particle size. Therefore, stable fluorescent PEI-capped CdS quantum dots are available.
| Author details: | Sabine KosmellaGND, Jane Venus, Jennifer Hahn, Claudia Christina PrietzelGND, Joachim KoetzORCiDGND |
|---|---|
| DOI: | https://doi.org/10.1016/j.cplett.2013.12.019 |
| ISSN: | 0009-2614 |
| ISSN: | 1873-4448 |
| Title of parent work (English): | Chemical physics letters |
| Publisher: | Elsevier |
| Place of publishing: | Amsterdam |
| Publication type: | Article |
| Language: | English |
| Year of first publication: | 2014 |
| Publication year: | 2014 |
| Release date: | 2017/03/27 |
| Volume: | 592 |
| Number of pages: | 6 |
| First page: | 114 |
| Last Page: | 119 |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Chemie |
| Peer review: | Referiert |
