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Francesco Stellacci

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Publications associées (214)

Amphiphilic amino acids: a key to adsorbing proteins to nanopatterned surfaces?

Francesco Stellacci

It has been suggested that amphiphilic amino acids play an important role in the adsorption of proteins on nanostructured surfaces with an ordered, striped domain structure such as those presented by monolayer-protected metal nanoparticles (MPMNs). We have ...

Royal Soc Chemistry2013

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

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

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

Quantitative Analysis of Scanning Tunneling Microscopy Images of Mixed-Ligand-Functionalized Nanoparticles

Christoph Renner, Francesco Stellacci, Quy Ong Khac, Javier Reguera Gomez

Ligand-protected gold nanoparticles exhibit large local curvatures, features rapidly varying over small scales, and chemical heterogeneity. Their imaging by scanning tunneling microscopy (STM) can, in principle, provide direct information on the architectu ...

American Chemical Society2013

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

A scalable synthesis of highly stable and water dispersible Ag-44(SR)(30) nanoclusters

Francesco Stellacci

We report the synthesis of atomically monodisperse thiol-protected silver nanoclusters Ag-44(SR)(30), (SR = 5-mercapto-2-nitrobenzoic acid) in which the product nanocluster is highly stable in contrast to previous preparation methods. The method is on ...

Royal Society of Chemistry2013

Direct Visualization of Single Ions in the Stern Layer of Calcite

Jean-François Molinari, Peter Spijker, Francesco Stellacci, Kislon Voitchovsky, Maria Ricci

Calcite is among the most abundant minerals on earth and plays a central role in many environmental and geochemical processes. Here we used amplitude modulation atomic force microscopy (AFM) operated in a particular regime to visualize single ions close to ...

American Chemical Society2013

Colloidal Stability of Self-Assembled Mono layer-Coated Gold Nanoparticles: The Effects of Surface Compositional and Structural Heterogeneity

Francesco Stellacci, Randy Patrick Carney

Surface heterogeneity plays an important role in controlling colloidal phenomena. This study investigated the self-aggregation and bacterial adsorption of self-assembled monolayer coated gold nanoparticles (AuNPs) with different surface compositional and s ...

American Chemical Society2013

Sensing Single Mixed-Monolayer Protected Gold Nanoparticles by the alpha-Hemolysin Nanopore

Francesco Stellacci, Randy Patrick Carney

Gold nanoparticles are widely used in various applications in fields including chemistry, engineering, biology, medicine, and electronics. These materials can be synthesized and modified with ligands containing different functional groups. Among nanopartic ...

American Chemical Society2013

Gold nanoparticles protected by fluorinated ligands for F-19 MRI

Francesco Stellacci

Gold nanoparticles coated with fluorinated ligands (F-MPCs) present features suitable for F-19 MRI as observed from phantom experiments. Cellular uptake, by HeLa cells, and toxicity of fluorescent dye-decorated F-MPCs are presented together with their abil ...

Royal Society of Chemistry2013

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

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

Amer Chemical Soc2013

Protein-nanoparticle interactions: the effects of surface compositional and structural heterogeneity are scale dependent

Francesco Stellacci, Randy Patrick Carney

Nanoparticles (NPs) in the biological environment are exposed to a large variety and concentration of proteins. Proteins are known to adsorb in a 'corona' like structure on the surface of NPs. In this study, we focus on the effects of surface compositional ...

Royal Society of Chemistry2013

Hydrophobic Meshes for Oil Spill Recovery Devices

Francesco Stellacci

Widespread use of petrochemicals often leads to accidental releases in aquatic environments, occasionally with disastrous results. We have developed a hydrophobic and oleophilic mesh that separates oil from water continuously in situ via capillary action, ...

Amer Chemical Soc2013

Patchy particles: From striped domains to Janus and beyond

Francesco Stellacci

Amer Chemical Soc2013

Interfaces and supramolecular surfaces

Francesco Stellacci

Amer Chemical Soc2013

Selectively wetting surfaces: A new approach to oil spill remediation

Francesco Stellacci

Amer Chemical Soc2013

Nanoscale Topography and Chemistry Affect Embryonic Stem Cell Self-Renewal and Early Differentiation

Francesco Stellacci

Adherent cells respond to a wide range of substrate cues, including chemistry, topography, hydrophobicity, and surface energy. The cell-substrate interface is therefore an important design parameter in regenerative medicine and tissue engineering applicati ...

Wiley-Blackwell2013

Diameter Effect on the Sidewall Functionalization of Single-Walled Carbon Nanotubes by Addition of Dichlorocarbene

Francesco Stellacci, Nicola Marzari

Dichlorocarbene is added to the sidewalls of single-walled carbon nanotubes (SWNTs) with diameters ranging from 1.2 to 2.2 nm. Small diameter SWNTs are found to react much more easily than large diameter SWNTs. Upon functionalization, the conductance could ...

Wiley-V C H Verlag Gmbh2012

Long-Lived Charge-Separated States in Ligand-Stabilized Silver Clusters

Francesco Stellacci

Recently developed synthesis methods allow for the production of atomically monodisperse clusters of silver atoms stabilized in solution by aromatic thiol ligands, which exhibit intense absorption peaks throughout the visible and near-IR spectral regions. ...

American Chemical Society2012

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

Dynamic Cellular Uptake of Mixed-Monolayer Protected Nanoparticles

Francesco Stellacci, Randy Patrick Carney, Marie Mueller, Tamara Michael Carney

Nanoparticles (NPs) are gaining increasing attention for potential application in medicine; consequently, studying their interaction with cells is of central importance. We found that both ligand arrangement and composition on gold nanoparticles play a cru ...

American Vacuum Society2012

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