Events

05 February

Local electronic/optoelectronic properties in graphene and 2D materials

Monday 05 February 2018, 12:00pm

ICN2 Seminar Hall, ICN2 Building, UAB

By Prof. Olga Kazakova - National Physical Laboratory, Teddington, UK 

Short Abstract: We present a combined study of local and global electronic properties of graphene devices as well as 2D materials and their heterostructures using a combination of SKPM, electrical and magnetic SGM and transport measurements. These studies are complemented by the use of local optoelectronic methods, such photoluminescence, Raman, nanoIR and sSNOM. We demonstrate that using advanced scanning probe microscopy techniques it is possible to obtain detailed information on the unique sample properties (such as the effect of non-uniformity, defective structure, degree of molecular absorption, etc.), which are not available by other more traditional methods. We also consider the effect of environmental doping on the local/global properties of graphene and 2D materials.

We demonstrate the accuracy of the measurements, which allow us to eliminate the common artefacts, which are not usually taken into account in many other approaches. The present work facilitates development of realistic graphene and 2D materials sensors and their faster and more reliable implementation.  

 

  1. V. Panchal, et al., Scientific Reports 3, 2597 (2013)
  2. R. K. Rajkumar, et al. J. of Appl. Phys. 115, 172606 (2014)
  3. V. Panchal, et al., Scientific Reports 4, 5881 (2014)
  4. C. Melios, et al., Scientific Reports 5, 10505 (2015)
  5. M. Munz, et al., ACS Nano 9, 8401 (2015)
  6. C. E. Giusca, et al. ACS Nano 10, 7840 (2016)
  7. C. Melios, et al., Nanoscale, 9, 3440 (2017)
  8. R. Strzelczyk, et al., Carbon 122, 168 (2017)
  9. Ch. Melios, et al., 2D Materials, Topical Review, In press (2018)