Publications by Wonjong Kim | EPFL Graph Search

Related publications (31)

Spatial Modulation of Vibrational and Luminescence Properties of Monolayer MoS & x2082; Using a GaAs Nanowire Array

Anna Fontcuberta i Morral, Wonjong Kim, Jean-Baptiste Leran, Mirjana Dimitrievska, Lucas Güniat, Didem Dede, Valerio Piazza, Akshay Balgarkashi

The integration of transition-metal dichalcogenides (TMDs) with non-planar substrates such as nanopillars provides a way to spatially modify the optical properties mainly through the localized strain. Similar studies to date have utilized insulating SiO2 n ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2022

Remote Doping of Scalable Nanowire Branches

Anna Fontcuberta i Morral, Wonjong Kim, Martin George Friedl, Lucas Güniat, Didem Dede, Nicholas Paul Morgan

Selective-area epitaxy provides a path toward high crystal quality, scalable, complex nanowire networks. These high-quality networks could be used in topological quantum computing as well as in ultrafast photodetection schemes. Control of the carrier densi ...

2020

Generation of Human iPSC-Derived Neurons on Nanowire Arrays Featuring Varying Lengths, Pitches, and Diameters

Anna Fontcuberta i Morral, Wonjong Kim

Nanowire (NW) arrays interfaced with biological cells have been demonstrated to be potent tools for advanced applications such as sensing, stimulation, or drug delivery. Many implementations, however, have so far only been studied with rather robust basic ...

WILEY2022

GaAs nanowires on Si nanopillars: towards large scale, phase-engineered arrays

Anna Fontcuberta i Morral, Wonjong Kim, Jean-Baptiste Leran, Didem Dede, Nicholas Paul Morgan, Akshay Balgarkashi, Lea Ghisalberti

Large-scale patterning for vapor-liquid-solid growth of III-V nanowires is a challenge given the required feature size for patterning (45 to 60 nm holes). In fact, arrays are traditionally manufactured using electron-beam lithography,for which processing t ...

2022

Nanoscale Mapping of Light Emission in Nanospade-Based InGaAs Quantum Wells Integrated on Si(100): Implications for Dual Light-Emitting Devices

Anna Fontcuberta i Morral, Wonjong Kim, Jean-Baptiste Leran, Nicolas Tappy, Didem Dede, Nicholas Paul Morgan, Valerio Piazza, Akshay Balgarkashi, Raphaël François Lemerle

III-V semiconductors outperform Si in many optoelectronics applications due to their high carrier mobility, efficient light emission and absorption processes, and the possibility to engineer their band gap through alloying. However, complementing Si techno ...

2022

Fundamental aspects to localize self-catalyzed III-V nanowires on silicon

Anna Fontcuberta i Morral, Martin George Friedl, Wonjong Kim, Heidi Andrea Potts, Jelena Vukajlovic Plestina, Lea Ghisalberti, William Craig Carter

III-V semiconductor nanowires deterministically placed on top of silicon electronic platform would open many avenues in silicon-based photonics, quantum technologies and energy harvesting. For this to become a reality, gold-free site-selected growth is nec ...

Nature Research2019

Growth of nanowire arrays from micron-feature templates

Gaëtan Bernard, Anna Fontcuberta i Morral, Wonjong Kim, Martin George Friedl, Lea Ghisalberti, Dmitry Mikulik, Pablo Romero Gómez, William Craig Carter

Here, we present a two-step annealing procedure to imprint nanofeatures on SiO2 starting from metallic microfeatures. The first annealing transforms the microfeatures into gold nanoparticles and the second imprints these nanoparticles into the SiO2 layer w ...

2019

Dataset for "GaAs nanowires on Si nanopillars: towards large scale, phase-engineered arrays"

Anna Fontcuberta i Morral, Wonjong Kim, Jean-Baptiste Leran, Didem Dede, Nicholas Paul Morgan, Akshay Balgarkashi, Lea Ghisalberti, William Craig Carter

Large-scale patterning for vapor-liquid-solid growth of III-V nanowires is a challenge given the required feature size for patterning (45 to 60 nm holes). In fact, arrays are traditionally manufactured using electron-beam lithography,for which processing t ...

Zenodo2022

Increasing Functionality of III-V Nanowires on Silicon Substrates

Wonjong Kim

Progress in nanotechnology, including fabrication and characterization tools, opened up the unprecedented low dimensional materials era, where we can manipulate and structure matter on a size scale that we could not reach before. Due to many interesting pr ...

EPFL2020

Template-Assisted Scalable Nanowire Networks

Anna Fontcuberta i Morral, Gözde Tütüncüoglu, Martin George Friedl, Heidi Andrea Potts, Wonjong Kim, Mahdi Zamani, Lucas Güniat

Topological qubits based on Majorana Fermions have the potential to revolutionize the emerging field of quantum computing by making information processing significantly more robust to decoherence. Nanowires are a promising medium for hosting these kinds of ...

American Chemical Society (ACS)2018

Dataset for "Does desorption affect the length distributions of nanowires?"

Anna Fontcuberta i Morral, Wonjong Kim, Jelena Vukajlovic Plestina

State-of-the art models for statistical properties within the nanowire ensembles consider influx of precursors, reflection and surface diffusion of adatoms. These models predict a delay in the nanowire growth start and the evolution toward an asymmetric le ...

Zenodo2019

Highly sensitive piezotronic pressure sensors based on undoped GaAs nanowire ensembles

Anna Fontcuberta i Morral, Wonjong Kim, Jelena Vukajlovic Plestina

Semiconducting piezoelectric materials have attracted considerable interest due to their central role in the emerging field of piezotronics, where the development of a piezo-potential in response to stress or strain can be used to tune the band structure o ...

IOP Publishing2019

Time-resolved open-circuit conductive atomic force microscopy for direct electromechanical characterisation

Anna Fontcuberta i Morral, Wonjong Kim, Jelena Vukajlovic Plestina

Studying nanomaterial piezoelectricity and triboelectricity is attractive for energy and sensing applications. However, quantitative characterisation of electromechanical effects in nanomaterials is challenging due to practical limitations and possible com ...

2020

Simultaneous Selective Area Growth of Wurtzite and Zincblende Self-Catalyzed GaAs Nanowires on Silicon

Anna Fontcuberta i Morral, Wonjong Kim, Lucas Güniat, Valerio Piazza

Selective area epitaxy constitutes a mainstream method to obtain reproducible nanomaterials. As a counterpart, self-assembly allows their growth without costly substrate preparation, with the drawback of uncontrolled positioning. We propose a mixed approac ...

American Chemical Society (ACS)2021

Does desorption affect the length distributions of nanowires?

Anna Fontcuberta i Morral, Wonjong Kim, Jelena Vukajlovic Plestina

State-of-the art models for statistical properties within the nanowire ensembles consider influx of precursors, reflection and surface diffusion of adatoms. These models predict a delay in the nanowire growth start and the evolution toward an asymmetric le ...

2019

Doping challenges and pathways to industrial scalability of III–V nanowire arrays

Anna Fontcuberta i Morral, Wonjong Kim, Lucas Güniat, Valerio Piazza

Semiconductor nanowires (NWs) have been investigated for decades, but their application into commercial products is still difficult to achieve, with triggering causes related to the fabrication cost and structure complexity. Dopant control at the nanoscale ...

2021

Thermal Rectification in Telescopic Nanowires: Impact of Thermal Boundary Resistance

Anna Fontcuberta i Morral, Wonjong Kim

A thermal diode, which, by analogy to its electrical counterpart, rectifies heat current, is the building block for thermal circuits. To realize a thermal diode, we demonstrate thermal rectification in a GaAs telescopic nanowire system using the thermal br ...

2025

Facet-driven formation of axial and radial In(Ga)As clusters in GaAs nanowires

Anna Fontcuberta i Morral, Martin George Friedl, Jean-Baptiste Leran, Wonjong Kim, Lucas Güniat, Nicolas Tappy, Santhanu Panikar Ramanandan, Didem Dede, Akshay Balgarkashi

Embedding quantum dots in nanowires (NWs) constitutes one promising building block for quantum photonic technologies. Earlier attempts to grow InAs quantum dots on GaAs nanowires were based on the Stranski-Krastanov growth mechanism. Here, we propose a nov ...

2020

Measuring the Optical Absorption of Single Nanowires

Anna Fontcuberta i Morral, Wonjong Kim, Simon Robert Escobar Steinvall

In this work we present a method to quantitatively measure the optical absorption of single nanowires that can be applied over a wide range of temperatures and with a high enough sensitivity to enable the measurement of below-band-gap absorption (as well a ...

American Physical Society (APS)2020

Dataset for "Template-assisted scalable nanowire networks"

Anna Fontcuberta i Morral, Wonjong Kim, Mahdi Zamani, Martin George Friedl, Heidi Andrea Potts

Topological qubits based on Majorana Fermions have the potential to revolutionize the emerging field of quantum computing by making information processing significantly more robust to decoherence. Nanowires are a promising medium for hosting these kinds of ...

Zenodo2018