On the passivation of iron particles at the nanoscale

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The oxidation of Fe@Au core@shell clusters with sizes below 5 nm is studied via high resolution scanning transmission electron microscopy. The bimetallic nanoparticles are grown in superfluid helium droplets under fully inert conditions, avoiding any effect of solvents or template structures, and deposited on amorphous carbon. Oxidation resistivity is tested by exposure to oxygen at ambient conditions. The passivating effect of Au-shells is studied in detail and a critical Au shell thickness is determined which keeps the Fe core completely unharmed. Additionally, we present the first synthesis of Fe@Au@Fe-oxide onion-type structures.

Original languageEnglish
Pages (from-to)2276-2283
Number of pages8
JournalNanoscale Advances
Volume1
Issue number6
DOIs
Publication statusPublished - 1 Jan 2019

Fingerprint

Passivation
passivity
Iron
Superfluid helium
iron
Oxidation
oxidation
Amorphous carbon
Oxides
templates
helium
Oxygen
Nanoparticles
Transmission electron microscopy
nanoparticles
transmission electron microscopy
Scanning electron microscopy
electrical resistivity
scanning electron microscopy
oxides

ASJC Scopus subject areas

  • Engineering(all)
  • Bioengineering
  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Chemistry(all)

Fields of Expertise

  • Advanced Materials Science

Cite this

On the passivation of iron particles at the nanoscale. / Lasserus, Maximilian; Knez, Daniel; Schnedlitz, Martin; Hauser, Andreas W.; Hofer, Ferdinand; Ernst, Wolfgang E.

In: Nanoscale Advances, Vol. 1, No. 6, 01.01.2019, p. 2276-2283.

Research output: Contribution to journalArticleResearchpeer-review

@article{e40f70cc24bc42bbb4c642bc63177b7c,
title = "On the passivation of iron particles at the nanoscale",
abstract = "The oxidation of Fe@Au core@shell clusters with sizes below 5 nm is studied via high resolution scanning transmission electron microscopy. The bimetallic nanoparticles are grown in superfluid helium droplets under fully inert conditions, avoiding any effect of solvents or template structures, and deposited on amorphous carbon. Oxidation resistivity is tested by exposure to oxygen at ambient conditions. The passivating effect of Au-shells is studied in detail and a critical Au shell thickness is determined which keeps the Fe core completely unharmed. Additionally, we present the first synthesis of Fe@Au@Fe-oxide onion-type structures.",
author = "Maximilian Lasserus and Daniel Knez and Martin Schnedlitz and Hauser, {Andreas W.} and Ferdinand Hofer and Ernst, {Wolfgang E.}",
year = "2019",
month = "1",
day = "1",
doi = "10.1039/c9na00161a",
language = "English",
volume = "1",
pages = "2276--2283",
journal = "Nanoscale Advances",
issn = "2516-0230",
publisher = "Royal Society of Chemistry",
number = "6",

}

TY - JOUR

T1 - On the passivation of iron particles at the nanoscale

AU - Lasserus, Maximilian

AU - Knez, Daniel

AU - Schnedlitz, Martin

AU - Hauser, Andreas W.

AU - Hofer, Ferdinand

AU - Ernst, Wolfgang E.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - The oxidation of Fe@Au core@shell clusters with sizes below 5 nm is studied via high resolution scanning transmission electron microscopy. The bimetallic nanoparticles are grown in superfluid helium droplets under fully inert conditions, avoiding any effect of solvents or template structures, and deposited on amorphous carbon. Oxidation resistivity is tested by exposure to oxygen at ambient conditions. The passivating effect of Au-shells is studied in detail and a critical Au shell thickness is determined which keeps the Fe core completely unharmed. Additionally, we present the first synthesis of Fe@Au@Fe-oxide onion-type structures.

AB - The oxidation of Fe@Au core@shell clusters with sizes below 5 nm is studied via high resolution scanning transmission electron microscopy. The bimetallic nanoparticles are grown in superfluid helium droplets under fully inert conditions, avoiding any effect of solvents or template structures, and deposited on amorphous carbon. Oxidation resistivity is tested by exposure to oxygen at ambient conditions. The passivating effect of Au-shells is studied in detail and a critical Au shell thickness is determined which keeps the Fe core completely unharmed. Additionally, we present the first synthesis of Fe@Au@Fe-oxide onion-type structures.

UR - http://www.scopus.com/inward/record.url?scp=85072018272&partnerID=8YFLogxK

U2 - 10.1039/c9na00161a

DO - 10.1039/c9na00161a

M3 - Article

VL - 1

SP - 2276

EP - 2283

JO - Nanoscale Advances

JF - Nanoscale Advances

SN - 2516-0230

IS - 6

ER -