Calculating the threshold energy of the pulsed laser sintering of silver and copper nanoparticles

Changmin Lee, Jae W. Hahn

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


In this study, in order to analyze the low-temperature sintering process of silver and copper nanoparticles, we calculate their melting temperatures and surface melting temperatures with respect to particle size. For this calculation, we introduce the concept of mean-squared displacement of the atom proposed by Shi (1994). Using a parameter defined by the vibrational component of melting entropy, we readily obtained the surface and bulk melting temperatures of copper and silver nanoparticles. We also calculated the absorption cross-section of nanoparticles for variation in the wavelength of light. By using the calculated absorption cross-section of the nanoparticles at the melting temperature, we obtained the laser threshold energy for the sintering process with respect to particle size and wavelength of laser. We found that the absorption cross-section of silver nanoparticles has a resonant peak at a wavelength of close to 350 nm, yielding the lowest threshold energy. We calculated the intensity distribution around the nanoparticles using the finite-difference time-domain method and confirmed the resonant excitation of silver nanoparticles near the wavelength of the resonant peak.

Original languageEnglish
Pages (from-to)601-606
Number of pages6
JournalJournal of the Optical Society of Korea
Issue number5
Publication statusPublished - 2016 Oct

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (NRF-2015R1A2A1A03064460)

Publisher Copyright:
© 2016 Optical Society of Korea.

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


Dive into the research topics of 'Calculating the threshold energy of the pulsed laser sintering of silver and copper nanoparticles'. Together they form a unique fingerprint.

Cite this