Assembly of acircular SnO2 rod using optical tweezers and laser curing of metal nanoparticles

Chanhyuk Nam, Daehie Hong, Jaeik Chung, Jaewon Chung, Insung Hwang, Jong Heun Lee, Seunghwan Ko, Costas P. Grigoropoulos

Research output: Contribution to journalArticle

Abstract

Acicular tin dioxide (SnO2) rods (1-2 mm in diameter, 5-20 mm long) were assembled and fused on the patterned gold electrode by an optical tweezer. In addition, the electrical contact between the assembled SnO 2 rod and the gold electrode was improved by laser curing of gold nanoparticles and the subsequent sintering in the oven. Here, the nanoparticles covered the entire area of the assembled SnO2 rod by evaporating a droplet of nanoparticle solution dripped on the assembled SnO2 rod. Subsequently, nanoparticles near the contact area between the rod and electrode were locally cured by direct heating with a focused infrared laser beam, which induced desorption of the surface monolayer. Therefore, the cured gold nanoparticles could be sintered after the non-laser irradiated nanoparticles were cleaned by the initial solvent application. Without sintering of the nanoparticles, the resistance of the assembled SnO2 rod was measured over several Mσ. After the nanoparticle sintering it could be reduced to a few hundred kσ, which was in agreement with the resistance of the assembled SnO2 rod.

Original languageEnglish
JournalJapanese Journal of Applied Physics
Volume49
Issue number5 PART 2
DOIs
Publication statusPublished - 2010 May 1

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Optical tweezers
Metal nanoparticles
curing
Curing
rods
assembly
Nanoparticles
nanoparticles
Lasers
metals
lasers
Gold
gold
sintering
Sintering
Electrodes
electrodes
Tin dioxide
Infrared lasers
ovens

ASJC Scopus subject areas

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

Cite this

Assembly of acircular SnO2 rod using optical tweezers and laser curing of metal nanoparticles. / Nam, Chanhyuk; Hong, Daehie; Chung, Jaeik; Chung, Jaewon; Hwang, Insung; Lee, Jong Heun; Ko, Seunghwan; Grigoropoulos, Costas P.

In: Japanese Journal of Applied Physics, Vol. 49, No. 5 PART 2, 01.05.2010.

Research output: Contribution to journalArticle

Nam, Chanhyuk ; Hong, Daehie ; Chung, Jaeik ; Chung, Jaewon ; Hwang, Insung ; Lee, Jong Heun ; Ko, Seunghwan ; Grigoropoulos, Costas P. / Assembly of acircular SnO2 rod using optical tweezers and laser curing of metal nanoparticles. In: Japanese Journal of Applied Physics. 2010 ; Vol. 49, No. 5 PART 2.
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