Publications de Kellen Michael Harkness

Reversible Microscale Assembly of Nanoparticles Driven by the Phase Transition of a Thermotropic Liquid Crystal

Francesco Stellacci, Holger Frauenrath, Paulo Henrique Jacob Silva, Stephen Schrettl, Kellen Michael Harkness

The arrangement of nanoscale building blocks into patternswithmicroscale periodicity is challenging to achieve via self-assemblyprocesses. Here, we report on the phase-transition-driven collectiveassembly of gold nanoparticles in a thermotropic liquid crys ...

AMER CHEMICAL SOC2023

Synthesis and characterization of mixed ligand chiral nanoclusters

Francesco Stellacci, Zekiye Pelin Güven, Kellen Michael Harkness

Chiral mixed ligand silver nanoclusters were synthesized in the presence of a chiral and an achiral ligand. While the chiral ligand led mostly to the formation of nanoparticles, the presence of the achiral ligand drastically increased the yield of nanoclus ...

Royal Society of Chemistry2016

Scanning tunneling microscopy and small angle neutron scattering study of mixed monolayer protected gold nanoparticles in organic solvents

Francesco Stellacci, Quy Ong Khac, Javier Reguera Gomez, Mauro Moglianetti, Marta Mameli, Kellen Michael Harkness

When a binary mixture of ligand molecules is used to coat gold nanoparticles, stripe-like domains can occur. These nanodomains confer nanoparticles unique structure-dependent properties. The domain structure has been characterized primarily using scanning ...

Royal Soc Chemistry2014

Curvature-dependent wetting of perfluorinated monolayers

Francesco Stellacci, Kellen Michael Harkness

Amer Chemical Soc2014

High-Resolution Scanning Tunneling Microscopy Characterization of Mixed Monolayer Protected Gold Nanoparticles

Francesco Stellacci, Quy Ong Khac, Mauro Moglianetti, Paulo Henrique Jacob Silva, Javier Reguera Gomez, Kellen Michael Harkness, Christoph Renner

Gold nanoparticles protected by a binary mixture of thiolate molecules have a ligand shell that can spontaneously separate into nanoscale domains. Complex morphologies arise in such ligand shells, including striped, patchy, and Janus domains. Characterizat ...

American Chemical Society2013

High-resolution scanning tunneling microscopy characterization of mixed monolayer coated gold nanoparticles

Francesco Stellacci, Quy Ong Khac, Mauro Moglianetti, Paulo Henrique Jacob Silva, Javier Reguera Gomez, Kellen Michael Harkness

Amer Chemical Soc2013

Ag-44(SR)(30)(4-): a silver-thiolate superatom complex

Francesco Stellacci, Kellen Michael Harkness

Intensely and broadly absorbing nanoparticles (IBANs) of silver protected by arylthiolates were recently synthesized and showed unique optical properties, yet question of their dispersity and their molecular formulas remained. Here IBANs are identified as ...

2012