The bright white emission of µ-diamonds
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2018-05-17 |
| Authors | W. Stręk, Robert Tomala, Adam Olejniczak, Anna Łukowiak, О. В. Игнатенко |
| Institutions | NanoVelos (Poland), Włodzimierz Trzebiatowski Institute of Low Temperature and Structure Research |
| Citations | 5 |
Abstract
Section titled “Abstract”The synthetic µ-diamonds powder was synthesized using high pressure high temperature technique. The metal-catalyst effect was used to reduce the pressure and temperature of diamonds synthesis. The irradiation of diamonds by focused beam of 975 nm laser diode lead to obtain intense broadband white emission with maximum at 620 nm. This type of white emission generation were described earlier for graphene ceramic and graphene foam. The emission of μ-diamonds is characterized by low threshold of power excitation and strong dependence of ambient pressure. It was suggested that the white light emission observed from graphene samples may originate from the laser-induced sp<sup>2</sup>↔sp<sup>3</sup> hybridization change as a result of the mechanism analogous to the intervalence charge transfer in Sr<sub>2</sub>CeO<sub>4</sub> nanocrystals. Similar sp<sup>2</sup>↔sp<sup>3</sup> hybridization change can occur in µ-diamonds resulting in intense, bright white light emission.
Tech Support
Section titled “Tech Support”Original Source
Section titled “Original Source”References
Section titled “References”- 2014 - Advantages of white LED lamps and new detector technology in photometry
- 2015 - Electrically driven, phosphor-free, white light-emitting diodes using gallium nitride-based double concentric truncated pyramid structures