2011
DOI: 10.1166/jnn.2011.3174
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Fabrication of CuO and Cu2O Nanoparticles in a Thick Polyimide Film by Post Heat Treatment in a Controlled-Atmosphere

Abstract: We investigated the formation of CuO or Cu2O nanoparticles in the thick polyimide films by oxidizing Cu nanoparticles at various temperatures during the post heat-treatment. Cu nanoparticles of 4-5 nm in diameter were initially formed in the polyimide film by the reaction between a Cu film and a polyimide precursor, polyamic acid, and a following thermal curing in a reducing atmosphere. After the subsequent post heat-treatments in oxidizing atmospheres, X-ray diffraction patterns revealed that initial metallic… Show more

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Cited by 6 publications
(7 citation statements)
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“…The phase of the nanoparticles depends on the curing atmosphere [30,34]. Cu 2 O nanoparticles are formed during post-heat treatment in an oxidizing atmosphere since Cu nanoparticles reacted with oxygen ions diffusing from the atmosphere, which matched well with our previous results [31]. The formation behavior of the nanoparticles in PI is the same regardless of PI type.…”
Section: Resultssupporting
confidence: 88%
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“…The phase of the nanoparticles depends on the curing atmosphere [30,34]. Cu 2 O nanoparticles are formed during post-heat treatment in an oxidizing atmosphere since Cu nanoparticles reacted with oxygen ions diffusing from the atmosphere, which matched well with our previous results [31]. The formation behavior of the nanoparticles in PI is the same regardless of PI type.…”
Section: Resultssupporting
confidence: 88%
“…The formation behavior of the nanoparticles in PI is the same regardless of PI type. Therefore, Cu or Cu 2 O nanoparticles can be selectively fabricated by controlling the curing atmosphere or the post-heat treatment using Cu powder through the same mechanism as the nanoparticle formation using a Cu film [31].…”
Section: Resultsmentioning
confidence: 99%
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“…This difference was caused by the enhanced mobility of the Cu ions in the region near the PI surface, which caused the nanoparticles to coalesce. 35 The Cu nanoparticles were fabricated by thermal decomposition of the Cu-PAA complex that formed during the reaction between Cu and PAA, accompanying the imidization of PAA into PI. The details of the mechanism of nanoparticle formation was explained in our previous paper.…”
Section: X-ray Diffraction Measurement Resultsmentioning
confidence: 99%
“…As a result, various synthesis routes have been employed to obtain Cu 2 O NP-fabricated GCE. One such unique route consisted of oxidizing colloidal CuNPs on the surface of GCE at a low temperature (<250 • C) in the air [37,38]; however, to the best of our knowledge, this strategy was not employed in electrochemical sensing applications of Cu 2 O NPs. On the other hand, copperammonia chemistry is well established in the literature regarding the electrodeposition of Cu from ammonia solution because of the diverse speciation of Cu 2 O and CuO [37,38]; however, no NH 3 detection was proposed earlier.…”
Section: Introductionmentioning
confidence: 99%