Seed-free growth of diamond patterns on silicon predefined by femtosecond laser direct writing

Mengmeng Wang, Yun Shen Zhou, Zhi Qiang Xie, Yang Gao, Xiang Nan He, Lan Jiang, Yong Feng Lu

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Seed-free growth of diamond patterns on Si surfaces was realized by surface patterning via femtosecond laser direct writing followed by laser-assisted combustion synthesis in open air. Prepatterned Si surfaces provide active nucleation sites for diamond growth. The dimension and shape of the diamond patterns can be precisely controlled at micrometer scales. Field-enhanced thermionic emission current was measured to monitor diamond nucleation and growth process in real time. The diamond nucleation density and quality depend strongly on the surface roughness of the prepatterned Si patterns. A higher surface roughness leads to more nucleation sites and higher nucleation density. However, high local temperature at peaks due to a large exposed surface to the flame on an excessively rough surface degrades the diamond quality. The easy fabrication of diamond patterns on nondiamond surfaces suggests potential applications such as cutting tools, protective coatings, heat sinks, etc.

Original languageEnglish (US)
Pages (from-to)716-722
Number of pages7
JournalCrystal Growth and Design
Volume13
Issue number2
DOIs
StatePublished - Feb 6 2013

Fingerprint

Diamond
Silicon
Ultrashort pulses
Seed
seeds
Diamonds
diamonds
Nucleation
silicon
nucleation
lasers
surface roughness
Surface roughness
Thermionic emission
combustion synthesis
Combustion synthesis
protective coatings
thermionic emission
heat sinks
Heat sinks

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Seed-free growth of diamond patterns on silicon predefined by femtosecond laser direct writing. / Wang, Mengmeng; Zhou, Yun Shen; Xie, Zhi Qiang; Gao, Yang; He, Xiang Nan; Jiang, Lan; Lu, Yong Feng.

In: Crystal Growth and Design, Vol. 13, No. 2, 06.02.2013, p. 716-722.

Research output: Contribution to journalArticle

Wang, Mengmeng ; Zhou, Yun Shen ; Xie, Zhi Qiang ; Gao, Yang ; He, Xiang Nan ; Jiang, Lan ; Lu, Yong Feng. / Seed-free growth of diamond patterns on silicon predefined by femtosecond laser direct writing. In: Crystal Growth and Design. 2013 ; Vol. 13, No. 2. pp. 716-722.
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