Journal Article

PUBDB-2025-05567

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png In-Situ Growth and Oxidation of Cu Nanoparticles on Rutile TiO$_2$(110)

Dolling, S. (Corresponding author)Extern*DESY* ; Blanco Garcia, M.DESY* ; Kohantorabi, M.DESY* ; Zhai, Y.DESY* ; Sochor, B.Extern*DESY* ; Tehrani, M. E. H. N. ; Schober, J.-C.Extern*DESY* ; Kao, M.-C.Extern*DESY* ; Dwivedi, J.Extern*DESY* ; Jeromin, A.DESY* ; Gutowski, O.DESY* ; Novikov, D.Extern*DESY* ; Keller, T. F.XFEL.EU*DESY* ; Roth, S.XFEL.EU*DESY* ; Stierle, A. (Corresponding author)XFEL.EU*DESY* ; Noei, H. (Corresponding author)DESY*

2026
Soc. Washington, DC

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Please use a persistent id in citations: doi:10.1021/acs.jpcc.6c00835  doi:10.3204/PUBDB-2025-05567

Abstract: Copper (Oxide) nanoparticles on TiO$_2$ substrates are of interest for various applications ranging from waste cleaning to photocatalytic virus inactivation.We studied the growth and the oxidation of Cu nanoparticles (NPs) on single crystalline rutile TiO$_2$(110) using X-ray grazing incidence diffraction and small angle scattering (GIXRD, GISAXS) and X-ray photoelectron spectroscopy (XPS) methods complemented by scanning Auger electron microscopy (SAM) and scanning electron microscopy (SEM). Cu NPs were grown via physical vapor deposition under ultra-high vacuum (UHV) conditions at different temperatures. We found that higher growth temperatures not only result in larger NPs but also different NP epitaxy.The particle's shape and size were studied with SAM, SEM, GIXRD and GISAXS, revealing homogeneous size distributions and oxidation states across the whole surface.It is found that the particles either fully oxidize to a mixture of CuO and Cu$_2$O or form core-shell particles with a metallic Cu core and an oxide shell after oxidation at 1 bar O$_2$ and exposure to ambient (atmospheric) conditions. With the exception of minor amounts of Cu$_2$O(111), all other oxides are amorphous.Testing the long-term stability of the NPs revealed that their oxidation state at different oxidation times (beyond the initial oxidation) did not change, confirming the stability of the NPs under ambient conditions.

Note: Proposal 20010075 was also used for this article, but can not be found in the system.

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Contributing Institute(s):

1. Nanolab (FS-NL)
2. Sustainable Materials (FS-SMA)
3. Experimentebetreuung PETRA III (FS-PET-D)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
3. FS-Proposal: I-20230376 (I-20230376) (I-20230376)
4. FS-Proposal: I-20230640 (I-20230640) (I-20230640)

Experiment(s):

1. DESY NanoLab: Sample Preparation
2. DESY NanoLab: Surface Spectroscopy
3. DESY NanoLab: Microscopy
4. PETRA Beamline P03 (PETRA III)
5. PETRA Beamline P07 (PETRA III)
6. PETRA Beamline P23 (PETRA III)

Appears in the scientific report 2026

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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