TY - JOUR
T1 - Field emission microscopy study of au-covered nanopyramids with {211}-facet sides grown on blunt W tips via assistive remolding treatment
AU - Rokuta, Eiji
AU - Nakagawa, Tatsuhiro
AU - Murata, Hidekazu
AU - Fujita, Shin
AU - Shimoyama, Hiroshi
AU - Oshima, Chuhei
PY - 2011/11
Y1 - 2011/11
N2 - 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.
AB - 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.
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U2 - 10.1143/JJAP.50.115001
DO - 10.1143/JJAP.50.115001
M3 - Article
AN - SCOPUS:80755143247
SN - 0021-4922
VL - 50
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
IS - 11 PART 1
ER -