Low-dimensional carbon materials

We investigate low-dimensional crystals, in particular carbon nanotubes (1D) and semiconductor nanoparticles (0D). Carbon nanotubes (CNT) are 1D carbon nanostructures, which can be viewed as graphene sheets rolled into a cylinder. Their properties depend critically on the atomic arrangement: even with similar diameter, CNT can be semiconducting or metallic, depending on the helical angle [given by the chiral index (n,m)]. Resonance Raman spectroscopy is a very elegant method to identify the chiral index of CNT. Currently, we are interested in the optical and electronic properties of covalently and non-covalently functionalized carbon nanotubes, in particular on the level of individual (n,m)-identified CNT. Semiconductor nanoparticles show strong dependence of their optical transitions on overall size and shape, as well as on the interfaces in core-shell structures. Here, current research questions address strain and alloying in core-shell nanoparticles.

Projects:

Contact Persons:

• Janina Maultzsch

Participating Scientists:

• Janina Maultzsch

Publications:

• Laudenbach J., Schmid D., Herziger F., Frank H., Kappes M., Muoth M., Haluska M., Hof F., Backes C., Hauke F., Hirsch A., Maultzsch J.:
  Diameter dependence of the defect-induced Raman modes in functionalized carbon nanotubes
  In: Carbon 112 (2017), p. 1-7
  ISSN: 0008-6223
  DOI: 10.1016/j.carbon.2016.10.065
• Tyborski C., Meinke R., Gillen R., Bischoff T., Knecht A., Richter R., Merli A., Fokin AA., Koso TV., Rodionov VN., Schreiner PR., Moeller T., Rander T., Thomsen C., Maultzsch J.:
  From isolated diamondoids to a van-der-Waals crystal: A theoretical and experimental analysis of a trishomocubane and a diamantane dimer in the gas and solid phase
  In: Journal of Chemical Physics 147 (2017), Article No.: 044303
  ISSN: 0021-9606
  DOI: 10.1063/1.4994898
• Kraus J., Meingast L., Hald J., Beil SB., Biskupek J., Ritterhoff C., Gsänger S., Eisenkolb J., Meyer B., Kaiser U., Maultzsch J., von Delius M.:
  Simultaneous Inside and Outside Functionalization of Single-Walled Carbon Nanotubes
  In: Angewandte Chemie International Edition (2024)
  ISSN: 1433-7851
  DOI: 10.1002/anie.202402417