High-yield fabrication and properties of 1.4 nm nanodiamonds with narrow size distribution

Autor(en)

Stepan Stehlik, Marian Varga, Martin Ledinsky, Daria Miliaieva, Halyna Kozak, Viera Skakalova, Clemens Mangler, Timothy J. Pennycook, Jannik C. Meyer, Alexander Kromka, Bohuslav Rezek

Abstrakt

Detonation nanodiamonds (DNDs) with a typical size of 5 nm have attracted broad interest in science and technology. Further size reduction of DNDs would bring these nanoparticles to the molecular- size level and open new prospects for research and applications in various fields, ranging from quantum physics to biomedicine. Here we show a controllable size reduction of the DND mean size down to 1.4 nm without significant particle loss and with additional disintegration of DND core agglutinates by air annealing, leading to a significantly narrowed size distribution (+/- 0.7 nm). This process is scalable to large quantities. Such molecular- sized DNDs keep their diamond structure and characteristic DND features as shown by Raman spectroscopy, infrared spectroscopy, STEM and EELS. The size of 1 nm is identified as a limit, below which the DNDs become amorphous.

Organisation(en)

Physik Nanostrukturierter Materialien

Externe Organisation(en)

Czech Academy of Sciences, Czech Technical University in Prague (CTU)

Journal

Scientific Reports

Band

6

Anzahl der Seiten

8

ISSN

2045-2322

DOI

https://doi.org/10.1038/srep38419

Publikationsdatum

12-2016

Peer-reviewed

Ja

ÖFOS 2012

103018 Materialphysik

Schlagwörter

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/e89560c7-aaad-466d-aa63-6e7eaf4d5e34