Ag Nanoparticle-Based Aerogel-like Films for Interfacial Thermal Management

Sebun Munakata, Shunji Kobayashi, Hisashi Sugime, Shota Konishi, Junichiro Shiomi, Suguru Noda*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

A Ag aerogel-like film (referred to as aerogel hereafter), used as a thermal interface material with enhanced performance and thermal stability, is reported. An aerogel/foil/aerogel "monocomposite" is created by rapidly forming and depositing Ag nanoparticles on both faces of a Ag foil by the gas-evaporation and particle-deposition method in a few minutes. The monocomposite, having an aerogel of a low packing ratio (<10%) with a clean surface, exhibits low thermal resistance (18 mm2K W-1) when sandwiched with Cu rods. The monocomposite exhibits excellent thermal stability and significantly reduced thermal resistance (3.0 mm2K W-1) at 246 °C, keeping its low thermal resistance (2.8 mm2K W-1) after the temperature is decreased to 51 °C; further, the resistance reduces to 2.1 mm2K W-1after 10 cycles of heating and cooling (100-200 °C). The Ag monocomposite, having high performance comparable to that of the benchmark In sheet and excellent thermal stability at a temperature higher than the melting point of In, will enable high-power and high-temperature operation of computing and power devices.

Original languageEnglish
Pages (from-to)15755-15761
Number of pages7
JournalACS Applied Nano Materials
Volume5
Issue number10
DOIs
Publication statusPublished - 2022 Oct 28

Keywords

  • aerogel
  • composite
  • gas evaporation
  • nanoparticles
  • particle deposition
  • silver
  • thermal interface material
  • thermal stability

ASJC Scopus subject areas

  • General Materials Science

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