Control of the initial growth in atomic layer deposition of Pt films by surface pretreatment

Authors
Pyeon, Jung JoonCho, Cheol JinBaek, Seung-HyubKang, Chong-YunKim, Jin-SangJeong, Doo SeokKim, Seong Keun
Issue Date
2015-07-31
Publisher
IOP PUBLISHING LTD
Citation
NANOTECHNOLOGY, v.26, no.30
Abstract
The controllability of the nucleation behavior of Pt in atomic layer deposition (ALD) by surface pretreatments with H2O, H2S, and NH3 was investigated. The H2O pretreatment on SiO2 and TiO2 surfaces had little effect on the nucleation of Pt. The H2S pretreatment on the SiO2 and TiO2 surfaces significantly delayed the nucleation of Pt on them, while the NH3 pretreatment on the TiO2 surface led to fluent nucleation of Pt. In particular, a continuous Pt film was successfully formed even at an ultrathin thickness of approximately 2.2 nm by NH3 pretreatment. This work suggests that the pretreatment with H2S and NH3 is an efficient way to control the nucleation of Pt in ALD without the support of any reactive species, such as plasma or O-3. Such a strategy enables the easy control of the size and distribution density of Pt nanoparticles for a wide range of applications.
Keywords
RU THIN-FILMS; PLATINUM NANOPARTICLES; NUCLEATION; OXIDE; INJECTION; RUTHENIUM; CATALYSTS; BEHAVIOR; TIO2; NH3; RU THIN-FILMS; PLATINUM NANOPARTICLES; NUCLEATION; OXIDE; INJECTION; RUTHENIUM; CATALYSTS; BEHAVIOR; TIO2; NH3; initial growth; nucleation behavior; atomic layer deposition; Pt; surface pretreatment
ISSN
0957-4484
URI
https://pubs.kist.re.kr/handle/201004/125213
DOI
10.1088/0957-4484/26/30/304003
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KIST Article > 2015
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