Abstract
With an eye toward using surface morphology to enhance heterogeneous catalysis, Pt nanoparticles are grown by atomic layer deposition (ALD) on the surfaces of SrTiO3 nanocubes. The size, dispersion, and chemical state of the Pt nanoparticles are controlled by the number of ALD growth cycles. The SrTiO3 nanocubes average 60 nm on a side with {001} faces. The Pt loading increases linearly with PtALD cycles to a value of 1.1 × 10-6 g cm-2 after five cycles. Scanning electron microscopy images reveal discrete, welldispersed Pt nanoparticles. Small- and wide-angle X-ray scattering show that the Pt nanoparticle spacing and size increase as the number of ALD cycles increases. X-ray absorption spectroscopy shows a progression from platinum(II) oxide to metallic platinum and a decrease in Pt-O bonding with an increase in Pt-Pt bonding as the number of ALD cycles increases.
| Original language | English |
|---|---|
| Pages (from-to) | 750-757 |
| Number of pages | 8 |
| Journal | Small |
| Volume | 5 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Mar 20 2009 |
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Keywords
- Atomic layer deposition
- Nanoparticles
- Platinum
- Strontium titan ate
- X-ray analysis
ASJC Scopus subject areas
- Biomaterials
- Engineering (miscellaneous)
- Biotechnology
- Medicine(all)
Cite this
Controlled growth of platinum nanoparticles on strontium titanate nanocubes by atomic layer deposition. / Christensen, Steven T.; Elam, Jeffrey W.; Rabuffetti, Federico A.; Ma, Qing; Weigand, Steven J.; Lee, Byeongdu; Seifert, Soenke; Stair, Peter C; Poeppelmeier, Kenneth R; Hersam, Mark C; Bedzyk, Michael J.
In: Small, Vol. 5, No. 6, 20.03.2009, p. 750-757.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Controlled growth of platinum nanoparticles on strontium titanate nanocubes by atomic layer deposition
AU - Christensen, Steven T.
AU - Elam, Jeffrey W.
AU - Rabuffetti, Federico A.
AU - Ma, Qing
AU - Weigand, Steven J.
AU - Lee, Byeongdu
AU - Seifert, Soenke
AU - Stair, Peter C
AU - Poeppelmeier, Kenneth R
AU - Hersam, Mark C
AU - Bedzyk, Michael J.
PY - 2009/3/20
Y1 - 2009/3/20
N2 - With an eye toward using surface morphology to enhance heterogeneous catalysis, Pt nanoparticles are grown by atomic layer deposition (ALD) on the surfaces of SrTiO3 nanocubes. The size, dispersion, and chemical state of the Pt nanoparticles are controlled by the number of ALD growth cycles. The SrTiO3 nanocubes average 60 nm on a side with {001} faces. The Pt loading increases linearly with PtALD cycles to a value of 1.1 × 10-6 g cm-2 after five cycles. Scanning electron microscopy images reveal discrete, welldispersed Pt nanoparticles. Small- and wide-angle X-ray scattering show that the Pt nanoparticle spacing and size increase as the number of ALD cycles increases. X-ray absorption spectroscopy shows a progression from platinum(II) oxide to metallic platinum and a decrease in Pt-O bonding with an increase in Pt-Pt bonding as the number of ALD cycles increases.
AB - With an eye toward using surface morphology to enhance heterogeneous catalysis, Pt nanoparticles are grown by atomic layer deposition (ALD) on the surfaces of SrTiO3 nanocubes. The size, dispersion, and chemical state of the Pt nanoparticles are controlled by the number of ALD growth cycles. The SrTiO3 nanocubes average 60 nm on a side with {001} faces. The Pt loading increases linearly with PtALD cycles to a value of 1.1 × 10-6 g cm-2 after five cycles. Scanning electron microscopy images reveal discrete, welldispersed Pt nanoparticles. Small- and wide-angle X-ray scattering show that the Pt nanoparticle spacing and size increase as the number of ALD cycles increases. X-ray absorption spectroscopy shows a progression from platinum(II) oxide to metallic platinum and a decrease in Pt-O bonding with an increase in Pt-Pt bonding as the number of ALD cycles increases.
KW - Atomic layer deposition
KW - Nanoparticles
KW - Platinum
KW - Strontium titan ate
KW - X-ray analysis
UR - http://www.scopus.com/inward/record.url?scp=63149165884&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=63149165884&partnerID=8YFLogxK
U2 - 10.1002/smll.200801920
DO - 10.1002/smll.200801920
M3 - Article
C2 - 19306465
AN - SCOPUS:63149165884
VL - 5
SP - 750
EP - 757
JO - Small
JF - Small
SN - 1613-6810
IS - 6
ER -