ELFT HÍRADÓ

[Szeminárium koordinátor <sem-admin AT szfki.hu>]

PhD Preliminary DefenseNaina MukeshWigner RCP SZFIIntroduction of defects in 
silicon carbide for quantum technologyTuesday, 24 October 2023, 10:00, KFKI 
Campus, Bldg. 1, 2nd floor, Conference RoomI will summarize the research that 
I conducted as a PhD student to contribute to the development towards silicon 
carbide based quantum sensors.Over the past ten years, the use of quantum 
dots in clinical research has been dominated by materials that provide a high 
risk of in vivo toxicity and approaches for decreasing application concerns 
which has been recently rewarded Nobel-prize in chemistry in 2023. 
Nevertheless, these quantum dots often consist of toxic elements that might 
be detrimental for human therapy. On the other hand, bioinert diamond and 
silicon carbide (SiC) nanoparticles represent appealing alternatives. 
Fluorescent nanodiamonds have additional functionalities with the 
nitrogen-vacancy color center which can be applied as a quantum sensor at 
ambient conditions. Nevertheless, nitrogen-vacancy color center is often not 
stable in molecular sized nanodiamonds where the size of the probes can be 
important in monitoring the biological processes, and their magneto-optical 
properties are not ideal for in vivo studies. Ádám Gali’s research group has 
found that divacancy color center can be introduced into molecular-sized SiC 
nanoparticles which can be principally used as a quantum sensor under ambient 
conditions with favorable optical properties for biosensing. In my studies, I 
used various methods to either directly introduce divacancy into porous SiC 
by irradiation and annealing treatments or to maximize the concentration of 
defects in SiC in the synthesis of SiC particles that can be used to form 
divacancy defects after post chemical treatments. In my talk, I will briefly 
show the methods that I used to prepare the SiC materials and to monitor the 
critical defect concentrations in these SiC samples. Minden érdeklődőt 
szívesen látunk! - Everyone is welcome to attend.Attila Nagysem-admin AT szfki.hu