ja404918z_si_001.pdf (2.09 MB)
Luminescence Studies of Individual Quantum Dot Photocatalysts
journal contribution
posted on 2013-09-04, 00:00 authored by Lilac Amirav, A. Paul AlivisatosUsing
far-field optical microscopy we report the first measurements
of photoluminescence from single nanoparticle photocatalysts. Fluence-dependent
luminescence is investigated from metal-semiconductor heterojunction
quantum dot catalysts exposed to a variety of environments, ranging
from gaseous argon to liquid water containing a selection of hole
scavengers. The catalysts each exhibit characteristic nonlinear fluence
dependence. From these structurally and environmentally sensitive
trends, we disentangle the separate rate-determining steps in each
particle across the very wide range of time scales, which follow the
initial light absorption process. This information will significantly
benefit the design of effective artificial photocatalytic systems
for renewable direct solar-to-fuel energy conversion.
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exhibittrendnonlinear fluence dependencequantumhole scavengersmeasurementinformationconversionheterojunctionphotocatalytic systemsPhotocatalystsUsinglight absorption processnanoparticle photocatalystsargonphotoluminescenceDotluminescenceLuminescence StudiesvarietymicroscopyIndividualQuantumtime scalesdot
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