Publications de Scott Charles Warren

Identifying champion nanostructures for solar water-splitting

Michael Graetzel, Maurin Cornuz, Cécile Hébert, Scott Charles Warren, Francesco Stellacci, Kislon Voitchovsky

Charge transport in nanoparticle-based materials underlies many emerging energy-conversion technologies, yet assessing the impact of nanometre-scale structure on charge transport across micrometre-scale distances remains a challenge. Here we develop an app ...

Nature Publishing Group2013

A silica sol-gel design strategy for nanostructured metallic materials

Michael Graetzel, Scott Charles Warren

Batteries, fuel cells and solar cells, among many other high-current-density devices, could benefit from the precise meso-to macroscopic structure control afforded by the silica sol-gel process. The porous materials made by silica sol-gel chemistry are typ ...

Nature Publishing Group2012

Influence of Plasmonic Au Nanoparticles on the Photoactivity of Fe2O3 Electrodes for Water Splitting

Michael Graetzel, Florian Le Formal, Scott Charles Warren

An experimental study of the influence of gold nanoparticles on a alpha-Fe2O3 photoanodes for photoelectrochemical water splitting is described. A relative enhancement in the water splitting efficiency at photon frequencies corresponding to the plasmon res ...

American Chemical Society2011

Probing the photoelectrochemical properties of hematite (alpha-Fe2O3) electrodes using hydrogen peroxide as a hole scavenger

Michael Graetzel, Kevin Sivula, Scott Charles Warren

We study hematite (alpha-Fe2O3) photoelectrodes for water splitting by examining the fate of photogenerated holes. Using H2O2 as an efficient hole scavenger, we collect all holes that arrive at the electrode/electrolyte interface. This provides the ability ...

2011

Self-assembled ordered mesoporous metals

Scott Charles Warren

Control over the structure of metals at the mesoscale (2-50 nm) is crucial for emerging applications such as energy conversion, sensing, and information processing. The self-assembly of nanoparticles with block copolymers provides a natural entry point to ...

2009

Electronic Properties of the Interface between p-CuI and anatase-phase n-TiO2 sngle crystal and nanoparticulate surfaces: A photoelectrochemical Study

Michael Graetzel, Scott Charles Warren

2007