Field emission microscopy study of au-covered nanopyramids with {211}-facet sides grown on blunt W tips via assistive remolding treatment

Eiji Rokuta, Tatsuhiro Nakagawa, Hidekazu Murata, Shin Fujita, Hiroshi Shimoyama, Chuhei Oshima

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Abstract

We produced atomic pyramids with three {211} facets at the apex of a blunt W h111i tip. The blunt W tip was preliminarily subjected to a remolding treatment to sharpen its end, which was aimed at reducing the burden of atom transport necessary for the growth of the pyramids, i.e., {211} faceting around the (111) plane. The effects of the remolding treatment were investigated in detail by field emission microscopy (FEM). From the results of a systematic experiment, a phase diagram of the tip-end structures was successfully represented as a function of remolding temperature and voltage. Consequently, remolding treatment at 2100 K was found to induce {211} faceting most significantly under all the conditions examined. Additional processes of Au deposition and postdeposition annealing were found to yield unique FEM patterns including typical signs of nanopyramid growth. The emission current stability exhibited by the resultant tip indicated that the source areas were comparable to the atomic dimensions.

Original languageEnglish
JournalJapanese Journal of Applied Physics
Volume50
Issue number11 PART 1
DOIs
Publication statusPublished - 2011 Nov

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ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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