Publications de Jiwon Kim | EPFL Graph Search

Formate as Anti-Oxidation Additives for Pb-Free FASnI(3) Perovskite Solar Cells

Jaeki Jeong, Jinhyun Kim, Jiyoun Seo, Jiwon Kim

Pb-free Sn-based perovskite solar cells (PSCs) have significant potential for application in photovoltaic devices because oftheir suitable bandgap, low exciton binding energy, high carrier mobility, and long diffusion length. However, their performance is ...

WILEY-V C H VERLAG GMBH2022

Two-Dimensional Nanoparticle Supracrystals: A Model System for Two-Dimensional Melting

Francesco Stellacci, Jiwon Kim

In a Langmuir trough, successive compression cycles can drive a two-dimensional (2D) nanoparticle supracrystal (NPSC) closer to its equilibrium structure. Here, we show a series of equilibrated 2D NPSCs consisting of gold NPs of uniform size, varying solel ...

American Chemical Society2016

Seeded solution growth of nanoparticles into ordered three-dimensional supracrystals

Francesco Stellacci, Jiwon Kim

We report on a novel synthetic method for ordered three-dimensional nanoparticle supracrystals, which is based on seeded solution growth of nanoparticles. The present study provides a new platform for nanoparticle supracrystals to be efficiently fabricated ...

RSC Publishing2013

Ultrasensitive detection of toxic cations through changes in the tunnelling current across films of striped nanoparticles

Francesco Stellacci, Eun Seon Cho, Jiwon Kim

Although multiple methods have been developed to detect metal cations, only a few offer sensitivities below 1 pM, and many require complicated procedures and sophisticated equipment. Here, we describe a class of simple solid-state sensors for the ultrasens ...

Nature Publishing Group2012

Determination of nanoparticle size distribution together with density or molecular weight by 2D analytical ultracentrifugation

Francesco Stellacci, Randy Patrick Carney, Jiwon Kim

Nanoparticles are finding many research and industrial applications, yet their characterization remains a challenge. Their cores are often polydisperse and coated by a stabilizing shell that varies in size and composition. No single technique can character ...

Nature Research2011

Evolution of Langmuir Film of Nanoparticles Through Successive Compression Cycles

Francesco Stellacci, Jiwon Kim

The success of nanoparticle-based devices will need reliable fabrication methods for well-defined, defect-free self-assembled structures of nanoparticles (NPs). NP self-assembly is a process governed by an interplay between many inter-particle interactions ...

2011