Room-Temperature Chemical Welding and Sintering of Metallic Nanostructures by Capillary Condensation

Sung Soo Yoon, Dahl Young Khang

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

Room-temperature welding and sintering of metal nanostructures, nanoparticles and nanowires, by capillary condensation of chemical vapors have successfully been demonstrated. Nanoscale gaps or capillaries that are abundant in layers of metal nanostructures have been found to be the preferred sites for the condensation of chemically oxidizing vapor, H2O2 in this work. The partial dissolution and resolidification at such nanogaps completes the welding/sintering of metal nanostructures within ∼10 min at room-temperature, while other parts of nanostructures remain almost intact due to negligible amount of condensation on there. The welded networks of Ag nanowires have shown much improved performances, such as high electrical conductivity, mechanical flexibility, optical transparency, and chemical stability. Chemically sintered layers of metal nanoparticles, such as Ag, Cu, Fe, Ni, and Co, have also shown orders of magnitude increase in electrical conductivity and improved environmental stability, compared to nontreated ones. Pertinent mechanisms involved in the chemical welding/sintering process have been discussed. Room-temperature welding and sintering of metal nanostructures demonstrated here may find widespread application in diverse fields, such as displays, deformable electronics, wearable heaters, and so forth.

Original languageEnglish
Pages (from-to)3550-3556
Number of pages7
JournalNano letters
Volume16
Issue number6
DOIs
Publication statusPublished - 2016 Jun 8

Fingerprint

welding
Condensation
Nanostructures
sintering
Welding
Sintering
condensation
Metals
room temperature
metals
Nanowires
nanowires
Temperature
Vapors
vapors
nanoparticles
electrical resistivity
Metal nanoparticles
Chemical stability
heaters

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

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Room-Temperature Chemical Welding and Sintering of Metallic Nanostructures by Capillary Condensation. / Yoon, Sung Soo; Khang, Dahl Young.

In: Nano letters, Vol. 16, No. 6, 08.06.2016, p. 3550-3556.

Research output: Contribution to journalArticle

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