A Chemical Nanoreactor Based on a Levitated Nanoparticle in Vacuum
Source abstract
Abstract
A single levitated nanoparticle is used as a nanoreactor for studying surface chemistry at the nanoscale. Optical levitation under controlled pressure, surrounding gas composition, and humidity provides extreme control over the nanoparticle, including dynamics, charge, and surface chemistry. Using a single nanoparticle avoids ensemble averages and allows studying how the presence of silanol groups at its surface affects the adsorption and desorption of water from the background gas with excellent spatial and temporal resolution. Herein, we demonstrate the potential of this versatile platform by studying the Zhuravlev model in silica particles. In contrast to standard methods, our system allowed the observation of an abrupt and irreversible change in scattering cross section, mass, and mechanical eigenfrequency during the dehydroxylation process, indicating changes in density, refractive index, and volume.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Microfluidic and Bio-sensing Technologies · Characterization and Applications of Magnetic Nanoparticles · Orbital Angular Momentum in Optics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, 08860 Castelldefels (Barcelona), Spain
Nanophotonic Systems Laboratory, ETH Zürich, 8092 Zürich, Switzerland
Institut für Festkörperphysik, Leibniz Universität Hannover, 30167 Hannover, Germany
Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany
Photonics Laboratory, ETH Zürich, 8093 Zürich, Switzerland
Nanoparticles Trapping Laboratory and Research Unit Modeling Nature (MNat), Universidad de Granada, 18071, Granada, Spain
Department of Applied Physics, Universidad de Granada, 18071 Granada, Spain
ICREA-Institució Catalana de Recerca i Estudis Avançats, 08010 Barcelona, Spain
Funding
Agencia de Innovaci?n y Desarrollo de Andaluc?a · Deutsche Forschungsgemeinschaft · Ag?ncia de Gesti? d?Ajuts Universitaris i de Recerca · H2020 European Research Council · Fundaci?n Cellex
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