Synthesis, characterization and microwave absorption of carbon-coated Cu nanocapsules

Yuping Sun, Chao Feng, Xianguo Liu, Siu Wing Or, Chuangui Jin

Research output: Journal article publicationJournal articleAcademic researchpeer-review

26 Citations (Scopus)


The microstructure and microwave absorption of carbon-coated Cu nanocapsules have been investigated. Carbon-coated Cu nanocapsules have been synthesized by an arc-discharge method. The paraffin-Cu/C nanocapsules composite shows excellent electromagnetic (EM) absorption properties. An optimal reflection loss (RL) value of -40.0 dB is reached at 10.52 GHz for a layer 1.9 mm thickness. RL exceeding -20 dB can be realized in any interval within the 1-18 GHz range by choosing an appropriate thickness of the absorbent layer between 1.1 and 10.0 mm. Theoretical simulation for the microwave absorption using the transmission line theory agrees reasonably well with the experimental results. The EM-wave absorption properties of nanocapsules materials are illustrated by means of an absorption-tube-map. The carbon-coated Cu nanocapsule is an attractive candidate for EM-wave absorption, which significantly enriches the family of EM-wave nanoabsorbents.
Original languageEnglish
Pages (from-to)477-482
Number of pages6
JournalMaterials Research
Issue number2
Publication statusPublished - 1 Jan 2014


  • Carbon
  • Microwave absorbers
  • Nanocomposites

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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