Size-Dependence of the Melting Temperature of Individual Au Nanoparticles

Philomena Schlexer, Anton Bay Andersen, Bela Sebok, Ib Chorkendorff, Jakob Schiøtz, Thomas W. Hansen*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Nanoparticles have an immense importance in various fields, such as medicine, catalysis, and various technological applications. Nanoparticles exhibit a significant depression in melting point as their size goes below ≈10 nm. However, nanoparticles are frequently used in high temperature applications such as catalysis where temperatures often exceed several 100 degrees which makes it interesting to study not only the melting temperature depression, but also how the melting progresses through the particle. Using high-resolution transmission electron microscopy, the melting process of gold nanoparticles in the size range of 2–20 nm Au nanoparticles combined with molecular dynamics studies is investigated. A linear dependence of the melting temper-ature on the inverse particle size is confirmed; electron microscopy imaging reveals that the particles start melting at the surface and the liquid shell formed then rapidly expands to the particle core.
Original languageEnglish
Article number1800480
JournalParticle & Particle Systems Characterization
Issue number3
Number of pages7
Publication statusPublished - 2019


  • Gold
  • Melting
  • Molecular dynamics simulations
  • Nanoparticles
  • Transmission electron microscopy


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