Gözde Tütüncüoglu

Cette personne a quitté l’EPFL

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Publications associées (50)

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Tuning growth direction of catalyst-free InAs(Sb) nanowires with indium droplets

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Martin George Friedl, Heidi Andrea Potts, Nicholas Paul Morgan

The need for indium droplets to initiate self-catalyzed growth of InAs nanowires has been highly debated in the last few years. Here, we report on the use of indium droplets to tune the growth direction of self-catalyzed InAs nanowires. The indium droplets ...

Institute of Physics2017

Imaging magnetic vortex configurations in ferromagnetic nanotubes

Anna Fontcuberta i Morral, Dirk Grundler, Gözde Tütüncüoglu

We image the remnant magnetization configurations of CoFeB and permalloy nanotubes (NTs) using x-ray magnetic circular dichroism photoemission electron microscopy. The images provide direct evidence for flux-closure configurations, including a global vorte ...

American Physical Society2017

Bi-stability of contact angle and its role in tuning the morphology of self-assisted GaAs nanowires

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Martin George Friedl, Wonjong Kim, Jean-Baptiste Leran, Luca Francaviglia, Lucas Güniat, Heidi Andrea Potts, Jelena Vukajlovic Plestina

We demonstrate the existence of two stable contact angles for the gallium droplet on top of self-assisted GaAs nanowires grown by MBE on patterned silicon substrates. Contact angle around 130 degrees fosters a continuous increase in the nanowire radius, wh ...

IEEE2018

Bistability of Contact Angle and Its Role in Achieving Quantum-Thin Self-Assisted GaAs nanowires

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Martin George Friedl, Wonjong Kim, Heidi Andrea Potts, Jean-Baptiste Leran, Luca Francaviglia, Lucas Güniat, Jelena Vukajlovic Plestina

American Chemical Society (ACS)2018

Probing inhomogeneous composition in core/shell nanowires by Raman spectroscopy

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Martin Heiss, Federico Matteini, Eleonora Russo, Sonia Conesa Boj, Esther Alarcon Llado, Francesca Amaduzzi

Due to its non-destructive and its micro-spatial resolution, Raman spectroscopy is a powerful tool for a rapid structural and compositional characterization of nanoscale materials. Here, by combining the compositional dependence of the Raman peaks with the ...

American Institute of Physics2014

Characterization and analysis of InAs/p-Si heterojunction nanowire-based solar cell

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Eleonora Russo, Federico Matteini, Esther Alarcon Llado, Anna Dalmau Mallorquí

The growth of compound semiconductor nanowires on the silicon platform has opened many new perspectives in the area of electronics, optoelectronics and photovoltaics. We have grown a 1 x 1 mm(2) array of InAs nanowires on p-type silicon for the fabrication ...

Institute of Physics2014

Engineering the Size Distributions of Ordered GaAs Nanowires on Silicon

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Martin George Friedl, Wonjong Kim, Heidi Andrea Potts, Jelena Vukajlovic Plestina, Maxime Lagier

Reproducible integration of III-V semiconductors on silicon can open new path toward CMOS compatible optoelectronics and novel design schemes in next generation solar cells. Ordered arrays of nanowires could accomplish this task, provided they are obtained ...

2017

Tilting Catalyst-Free InAs Nanowires by 3D-Twinning and Unusual Growth Directions

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Martin George Friedl, Heidi Andrea Potts, Jean-Baptiste Leran

Controlling the growth direction of nanowires is of strategic importance both for applications where nanowire arrays are contacted in parallel and for the formation of more complex nanowire networks. We report on the existence of tilted InAs nanowires on ( ...

American Chemical Society2017

Anisotropic-Strain-Induced Band Gap Engineering in Nanowire-Based Quantum Dots

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Martin George Friedl, Heidi Andrea Potts, Wonjong Kim, Luca Francaviglia, Lucas Güniat, Jelena Vukajlovic Plestina, Andrea Giunto, Pablo Romero Gómez

American Chemical Society (ACS)2018

Quantum Heterostructures Based on GaAs Nanomembranes for Photonic Applications

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Martin George Friedl, Federico Matteini, Heidi Andrea Potts, Jean-Baptiste Leran

Ieee2016