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Area-Selective Atomic Layer Deposition of Metal Oxides on Noble Metals through Catalytic Oxygen Activation

Title
Area-Selective Atomic Layer Deposition of Metal Oxides on Noble Metals through Catalytic Oxygen Activation
Author
김우희
Keywords
CARBON NANOTUBES; THIN-FILMS; HIGH-QUALITY; NANOPARTICLES; PLATINUM; PLASMA; GROWTH; GOLD; DISSOCIATION; OXIDATION
Issue Date
2017-12
Publisher
AMER CHEMICAL SOC
Citation
CHEMISTRY OF MATERIALS, v. 30, No. 3, Page. 663-670
Abstract
Area-selective atomic layer deposition (ALD) is envisioned to play a key role in next-generation semiconductor processing and can also provide new opportunities in the field of catalysis. In this work, we developed an approach for the area-selective deposition of metal oxides on noble metals. Using O-2 gas as co-reactant, area-selective ALD has been achieved by relying on the catalytic dissociation of the oxygen molecules on the noble metal surface, while no deposition takes place on inert surfaces that do not dissociate oxygen (i.e., SiO2, Al2O3, Au). The process is demonstrated for selective deposition of iron oxide and nickel oxide on platinum and iridium substrates. Characterization by in situ spectroscopic ellipsometry, transmission electron microscopy, scanning Auger electron spectroscopy, and X-ray photoelectron spectroscopy confirms a very high degree of selectivity, with a constant ALD growth rate on the catalytic metal substrates and no deposition on inert substrates, even after 300 ALD cycles. We demonstrate the area-selective ALD approach on planar and patterned substrates and use it to prepare Pt/Fe2O3 core/shell nanoparticles. Finally, the approach is proposed to be extendable beyond the materials presented here, specifically to other metal oxide ALD processes for which the precursor requires a strong oxidizing agent for growth.
URI
https://pubs.acs.org/doi/abs/10.1021/acs.chemmater.7b03818https://repository.hanyang.ac.kr/handle/20.500.11754/105862
ISSN
0897-4756; 1520-5002
DOI
10.1021/acs.chemmater.7b03818
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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