ELFT HÍRADÓ

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SZFI SeminarAna CadenaWigner RCP SZFIGraphene nanoribbons in carbon and boron 
nitride nanotubesTuesday, 7 February 2023, 10:00, KFKI Campus, Bldg. 1, 2nd 
floor, Conference RoomGraphene nanoribbons (GNRs) are one-dimensional 
structures described as stripes of graphene. Their edges are responsible for 
new electronic states compared to those of graphene such as a band gap 
opening, contrary to the zero-band gap graphene. Since GNRs’ structure is 
closely related to their electronic and optical properties and their band gap 
is inversely proportional to their width, it becomes essential to produce 
narrow and edge-controlled GNRs. Narrow GNRs can be grown by bottom-up 
procedures using small molecules as building blocks. One of these techniques 
consists of using the inert inner environment of the nanotube to grow GNRs 
whose width is determined by the nanotube diameter. Here I will talk about 
our findings of a new precursor, 1,2,4-trichlorobenzene, to produce GNRs 
inside carbon and boron nitride nanotubes [1,2]. This material is a liquid at 
room temperature which facilitates both the encapsulation and the removal of 
the excess molecules adsorbed on the nanotube walls by evaporation. Molecules 
encapsulated in carbon and boron nitride nanotubes were subjected to thermal 
annealing and the products were characterized by conventional and 
tip-enhanced Raman spectroscopy and transmission electron microscopy that 
revealed GNR formation.[1] A. Cadena et al. , J. Phys. Chem. Lett. 13, 
9752—9758 (2022)[2] A. Cadena et al. , Phys. Status Solidi-Rapid Res. Lett. 
17, 2200284—1—5 (2023)  Join Zoom 
Meetinghttps://wigner-hu.zoom.us/j/82738938485?pwd=K014VzZWd3ArTWFyYUN4ODhybUFmdz09Meeting
 ID: 827 3893 8485Passcode: 649232 Minden érdeklődőt szívesen látunk! - 
Everyone is welcome to attend.Attila Nagysem-admin AT szfki.hu