Zobrazeno 1 - 10
of 365
pro vyhledávání: '"Fink, Hans"'
Publikováno v:
Nano Letters 2018, 18, 6, 3421-3427
The interaction of metals with carbon materials, specifically with graphene, is of importance for various technological applications. In particular, intercalation of alkali metals is believed to provide a means for tuning the electronic properties of
Externí odkaz:
http://arxiv.org/abs/2301.10548
Autor:
Latychevskaia, Tatiana, Escher, Conrad, Andregg, William, Andregg, Michael, Fink, Hans-Werner
Publikováno v:
Scientific Reports 9, 8889 (2019)
Low-energy electrons offer a unique possibility for long exposure imaging of individual biomolecules without significant radiation damage. In addition, low-energy electrons exhibit high sensitivity to local potentials and thus can be employed for ima
Externí odkaz:
http://arxiv.org/abs/1908.09374
Publikováno v:
Ultramicroscopy 197, 46-52 (2019)
We investigate imaging of moire structures in free-standing twisted bilayer graphene (TBG) carried out by transmission electron microscopy (TEM) in diffraction and in-line Gabor holography modes. Electron diffraction patterns of TBG acquired at typic
Externí odkaz:
http://arxiv.org/abs/1811.09830
Publikováno v:
Optics Express, Vol. 26, Issue 23, pp. 30991-31017 (2018)
Coherent diffraction imaging (CDI) allows the retrieval of the structure of an isolated object, such as a macromolecule, from its diffraction pattern. CDI requires the fulfilment of two conditions: the imaging radiation must be coherent and the objec
Externí odkaz:
http://arxiv.org/abs/1811.04459
Publikováno v:
Optics Express, Volume 25, Isuue 17, pp. 20109-20124 (2017)
Mechanical vibrations of components of the optical system is one of the sources of blurring of interference pattern in coherent imaging systems. The problem is especially important in holography where the resolution of the reconstructed objects depen
Externí odkaz:
http://arxiv.org/abs/1708.03351
Publikováno v:
Ultramicroscopy, Volume 182, Pages 276-282, 2017
While imaging individual atoms can routinely be achieved in high resolution transmission electron microscopy, visualizing the potential distribution of individually charged adsorbates leading to a phase shift of the probing electron wave is still a c
Externí odkaz:
http://arxiv.org/abs/1610.06420
Autor:
Wicki, Flavio, Longchamp, Jean-Nicolas, Latychevskaia, Tatiana, Escher, Conrad, Fink, Hans-Werner
Publikováno v:
Physical Review B, Volume 94, Issue 7, 075424 (2016)
We report angle-resolved electron transmission measurements through freestanding graphene sheets in the energy range of 18 to 30 eV above the Fermi level. The measurements are carried out in a low-energy electron point source microscope, which allows
Externí odkaz:
http://arxiv.org/abs/1606.00363
Autor:
Latychevskaia, Tatiana, Wicki, Flavio, Longchamp, Jean-Nicolas, Escher, Conrad, Fink, Hans-Werner
Publikováno v:
Nano Letters, Volume 16, Issue 9, pages 5469-5474, 2016
Visualizing individual charges confined to molecules and observing their dynamics with high spatial resolution is a challenge for advancing various fields in science, ranging from mesoscopic physics to electron transfer events in biological molecules
Externí odkaz:
http://arxiv.org/abs/1603.08781
Publikováno v:
Applied Optics 55, 6095-6101 (2016)
We present a detailed study of two novel methods for shaping the light optical wavefront by employing a transmissive spatial light modulator (SLM). Conventionally, optical Airy beams are created by employing SLMs in the so-called all phase mode. In t
Externí odkaz:
http://arxiv.org/abs/1602.06465