Dr. rer. nat. Emanuela Margapoti

 
Room: S213
Category: Scientific Staff
Phone: 11366
Email: Emanuela.Margapoti(at)wsi.tum.de

Graphene is known for the several exotic electronic properties, such as unconventional integer quantum Hall effect, ultrahigh electron mobility and ballistic transport. The main reason of these features account to its electronic density of states which vanishes at the so-called Dirac points, where the valence and the conduction bands cross with linear energy-momentum dispersion.  Due to the hexagonal symmetry of graphene, the Dirac points are located at two high-symmetry points of its Brillouin zone. However, in spite of the many promising properties of graphene, its lack of a band gap as in common semiconductor materials is detrimental in term of switch on and off the current, necessary for active electronic devices, as switches and transistors. This is one of the main obstacles that made this outstanding material useful in many electronic applications. Recently several attempts have been employed to try to open a gap in graphene, including hydrogenation or functionalization of the 2D graphene surface and which often end up with the carbon-carbon bond breaking, leading to a reduced mobility. One way to address this problem would be to open a gap by locally inducing a strain, deforming the Brillouin zone without compromise the mobility. Our aim is to combine the knowledge of organic chemistry and solid state physics to induce a switchable local strain in order to open a gap on demand.

Publications

Photoluminescence and Raman investigation of stability of InSe and GaSe thin films

arXiv:1506.05619 (2015)

O. Del Pozo-Zamudio | S. Schwarz | J. Klein | R. Schofield | E. Chekhovich | O. Ceylan | E. Margapoti | A. I. Dmitriev | G. V. Lashkarev | D. N. Borisenko | N. N. Kolesnikov | J. Finley | A. I. Tartakovskii

Online Reference

Photoinduced C-C Reactions on Insulators toward Photolithography of Graphene Nanoarchitectures

J. Am. Chem. Soc. (2014), 136 (12), pp4651-4658

C. A. Palma | K. Diller | R. Berger | A. Welle | J. Björk | J. L. Cabellos | D. J. Mowbray | A. C. Papageorgiou | N. P. Ivleva | S. Matich | E. Margapoti | R. Niessner | B. Menges | J. Reichert | X. Feng | H. J. Räder | F. Klappenberger | A. Rubio | K. Müllen | J. Barth |

Online Reference

Tailoring of quantum dot emission efficiency by localized surface plasmon polaritons in self-organized mesoscopic rings.

Nanoscale 6, 741 (2014).

E. Margapoti | D. Gentili | M. Amelia | A. Credi | V. Morandi | M. Cavallini

Three-Dimensional Bicomponent Supramolecular Nanoporous Self-Assembly on a Hybrid All-Carbon Atomically Flat and Transparent Platform

Nano Lett., 2014, 14 (8), pp 4486–4492

J. Li | S. Wieghold | M. A. Öner | P. Simon | M. Hauf | E. Margapoti | J. A. Garrido | F. Esch | C. A. Palma | J. V. Barth

Online Reference

Tuning the optical emission of MoS2 nanosheets using proximal photoswitchable azobenzene molecules

Appl. Phys. Lett. 105, 241116 (2014)

J. Li | J. Wierzbowski | O. Ceylan | J. Klein | F. Nisic | T. L. Anh | F. Meggendorfer | C. A. Palma | C. Dragonetti | J. V. Barth | J. Finley | E. Margapoti

Online Reference

Optoelectronic properties of OLEC devices based on phenylquinoline and phenylpyridine ionic iridium complexes

Dalton Transaction, 2012, 41, 9227-9231

E. Margapoti | M. Muccini | A. Sharma | A. Colombo | C. Dragonetti | A.  Valore | D. Roberto

Download   Online Reference

Paramagnetic shift in thermally annealed CdxZn1-xSe quantum dots

New Journal of Physics 14 (2012) 043038

 

E. Margapoti | F. M. Alves | S. Mahapatra | V. Lopez-Richard | L. Worschech | K. Brunner | F. Qu | C. Destefani | E. Menendez-Proupin | A. Forchel | G. E. Marques

Online Reference

Characterization of spin-state tuning in thermally annealed semiconductor quantum dots

Phys. Rev. B 82, 205318 (2010)

E. Margapoti | F. M. Alves | S. Mahapatra | T. Schmidt | V. Lopez-Richard | C. Destefani | E. Menendez | F. Qu | C. Bougerol | K. Brunner | A. Forchel | G. E. Marques | L. Worschech

Online Reference

Excimer Emission in Single Layer Electroluminescent Devices Based on [Ir(4,5-diphenyl-2-methylthiazolo)2(5-methyl-1,10-phenanthroline)]+?[PF6]-

J. Phys. Chem. C 113, 12517 (2009)

E. Margapoti | V. Shukla | A. Valore | A. Sharma | C. Dragonetti | C. C. Kitts | D. Roberto | M. Murgia | R. Ugo | M. Muccini

Online Reference

Negative magnetopolarization in thermally annealed self-assembled quantum dots

Phys. Rev. B 77, 073308 (2008)

E. Margapoti | L. Worschech | K. Brunner | F. M. Alves | V. Lopez-Richard | G. E. Marques | C. Bougerol | A. Forchel |

Online Reference

Annealing induced inversion of quantum dot fine-structure splitting

Appl. Phys. Lett. 90, 181927 (2007)

E. Margapoti | L. Worschech | A. Forchel | A. Tribu | T. Aichele | R. Andre | K. Kheng

Online Reference

TUM Technische Universität München TUM Technische Universität München Physik Department Elektrotechnik und Informationstechnik TUM Technische Universität München
 

Events & News

17 Jan 2018

ERC Consolidator Grant for Gregor Koblmüller   more

10 Aug 2017

Best Poster Awards for Ganpath Veerabathran and Alexander Andrejew at iNOW 2017   more

27 Jun 2017

Best Poster Award at Nanowire Week for Jochen Bissinger   more

15 Mar 2017

Dr. Kai Müller admitted to the “Junges Kolleg” of the Bavarian Academy of Sciences   more

27 Feb 2017

Two-photon pulses from a single two-level system   more

Seminars

January 26, 2018

Reliability of hexagonal boron nitride dielectric stacks for CMOS applications   more

January 23, 2018

Helical states, spin-orbit coupling, and phase-coherent transport in InAs nanowires   more

January 16, 2018

New insights into novel (and conventional) materials using polarization-sensitive infrared magneto-spectroscopy   more