Silica-embedded Gold Nanoparticles Analyzed by Atom Probe Tomography
Artikel i vetenskaplig tidskrift, 2024

Nanoparticles are utilized in a multitude of applications due to their unique properties. Consequently, characterization of nanoparticles is crucial, and various methods have been employed in these pursuits. One such method is Atom Probe Tomography (APT). However, existing sample preparation techniques for APT generally involve embedding of the nanoparticles in a matrix different from their environment in solutions or at solid-liquid interfaces. In this work, we demonstrate a methodology based on silica embedding and explore how it can be utilized to form a matrix for nanoparticles suitable for APT analysis. Through chemisorption to a surface, gold nanoparticles were densely packed, ensuring a high probability of encountering at least one particle in the APT analyses. The nanoparticle-covered surface was embedded in a silica film, replacing the water and thus making this method suitable for studying nanoparticles in their hydrated state. The nanoparticle's silver content and its distribution, originating from the nanoparticle synthesis, could be identified in the APT analysis. Sodium clusters, possibly originating from the sodium citrate used to stabilize the particles in solution, were observed on the nanoparticle surfaces. This indicates the potential for silica embedding to be used for studying ligands on nanoparticles in their hydrated state. Graphical Abstract

stabilizing ligands

atom probe tomography

silica embedding

gold nanoparticles

Författare

Gustav Eriksson

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Mats Hulander

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Mattias Thuvander

Chalmers, Fysik, Mikrostrukturfysik

Martin Andersson

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Microscopy and Microanalysis

1431-9276 (ISSN) 1435-8115 (eISSN)

Vol. In Press

4D Microscopy of biological materials by short pulse terahertz sources (MIMOSA)

Europeiska kommissionen (EU) (101046651-MIMOSA), 2022-09-01 -- 2026-08-31.

Ämneskategorier

Materialkemi

Nanoteknik

DOI

10.1093/mam/ozae024

PubMed

38525893

Mer information

Senast uppdaterat

2024-04-11