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Humboldt-Universität zu Berlin - Mathematisch-Naturwissen­schaft­liche Fakultät - Institut für Physik

Kolloquium von IRIS Adlershof zum Thema: "Exploring Confined Carbyne"

Wann 05.10.2021 von 15:15 bis 17:15 (Europe/Berlin / UTC200) iCal
Wo Erwin-Schrödinger-Zentrum, Konferenz Room 0‘119 Rudower Chaussee 26, 12489 Berlin
Kolloquium von IRIS Adlershof zum Thema: "Exploring Confined Carbyne"    
 

 

 

The colloquium will be held as a hybrid event with a maximum of 30 on-site listeners and additional online participants.
 

To participate on site, please register at:

office@iris-adlershof.de

 

 

Sprecher: Dr. Sebastian Heeg
Emmy Noether-Nachwuchs­gruppe
Institut für Physik, HU Berlin

 

Abstract: Carbyne by definition is an infinite linear chain of carbon atoms that forms the truly one-dimensional allotrope of carbon. It is a polyyne with alternating single and triple bonds originating from a Peierls distortion such that carbyne is semiconducting in its stable structural form. The exploration of carbyne and its properties, however, has long been hindered by its extreme chemical instability and short chain lengths far below the threshold of 100 atoms for which finite linear carbon chains mimic the properties of carbyne. A breakthrough was achieved in 2016 with the synthesis, stabilization and study of individual carbyne chains comprising of thousands of atoms inside double-walled carbon nanotubes.
In this talk, I will present our recent studies of individual linear carbyne chains confined inside carbon nanotubes by Raman spectroscopy. We reveal that the nanotube host, characterized by its chirality (diameter and electronic structure), determines the electronic and vibronic structure of the confined carbyne chain. We show that confined carbyne has an extraordinarily high Raman scattering cross section, the rate at which light is scattered inelastically by vibrations, and discuss how this feature of confined carbyne may be used applications. Finally, I will discuss the current limitations in studying this exciting new material and provide an outlook on future directions.

 

Analog: Erwin-Schrödinger-Zentrum, Konferenz Room 0‘119
Rudower Chaussee 26, 12489 Berlin

 

Online: Zoom-Meeting
Meeting-ID: 640 8893 8219
Passwort: 621677

 

Zeit: 15:15 - 16:15