Drndic, Marija

Email Address
ORCID
Disciplines
Research Projects
Organizational Units
Position
Introduction
Research Interests

Filters

2008 - 20102
2
2
Reset filters

Settings

Search Results

Now showing 1 - 2 of 2
  • Publication
    Electron Beam Nanosculpting of Suspended Graphene Sheets
    (2008-09-16) Fischbein, Michael D.; Drndić, Marija
    We demonstrate high-resolution modification of suspended multilayer graphene sheets by controlled exposure to the focused electron beam of a transmission electron microscope. We show that this technique can be used to realize, on time scales of a few seconds, a variety of features, including nanometer-scale pores, slits, and gaps that are stable and do not evolve over time. Despite the extreme thinness of the suspended graphene sheets, extensive removal of material to produce the desired feature geometries is found not to introduce long-range distortion of the suspended sheet structure.
  • Publication
    Characterization of Memory and Measurement History in Photoconductivity of Nanocyrstal Arrays
    (2010-01-01) Fairfield, Jessamyn A; Dadosh, Tali; Drndic, Marija
    Photoconductivity in nanocrystal films has been previously characterized, but memory effects have received little attention despite their importance for device applications. We show that the magnitude and temperature dependence of the photocurrent in CdSe/ZnS core-shell nanocrystal arrays depends on the illumination and electric field history. Changes in photoconductivity occur on a few-hour timescale, and subband gap illumination of nanocrystals prior to measurements modifies the photocurrent more than band gap illumination. The observed effects can be explained by charge traps within the band gap that are filled or emptied, which may alter nonradiative recombination processes and affect photocurrent.