Surface and interface characterization of self-assembled copper oxide quantum dots on SrTiO 3(001) surface

S. Thevuthasan, P. Nachimuthu, Y. J. Kim, I. Lyubinetsky, A. S. Lea, V. Shutthanandan, M. H. Engelhard, D. R. Baer, D. K. Shuh, D. W. Lindle

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Copper oxide quantum dots (QDs) were grown in various thicknesses on different SrTiO 3(001) surfaces and were characterized using various surface and bulk sensitive techniques. The experimental growth conditions were optimized to obtain Cu 2O as the major phase in these structures. The copper oxide QDs grown on clean SrTiO 3(001) surfaces at 825 K or higher with p(O 2) of 9.0×10 -7 Torr or above contain mostly Cu(II) in contrast to those grown at 800 K with p(O 2) of ∼7.0×10 -7 Torr that contain primarily Cu(I). Furthermore, it has been established that there is a strong interaction between the SrTiO 3(001) surface and the first few monolayers of these nano structures, which induces the formation of Cu(II). However, this interaction is mitigated with increasing thickness of copper oxide QDs resulting in the exclusive formation of Cu 2O in the topmost layers. Modification of substrate surfaces using chemical treatment and/or energetic Au 2+ ion-beam irradiation affects the formation of these structures.

Original languageEnglish
Title of host publication2003 Nanotechnology Conference and Trade Show - Nanotech 2003
EditorsM. Laudon, B. Romanowicz
Pages278-281
Number of pages4
Volume3
Publication statusPublished - 2003
Externally publishedYes
Event2003 Nanotechnology Conference and Trade Show - Nanotech 2003 - San Francisco, CA
Duration: 23 Feb 200327 Feb 2003

Other

Other2003 Nanotechnology Conference and Trade Show - Nanotech 2003
CitySan Francisco, CA
Period23/2/0327/2/03

Fingerprint

Copper oxides
Semiconductor quantum dots
Ion beams
Monolayers
Irradiation
Substrates

Keywords

  • Atomic Force Microscopy (AFM)
  • Characterization
  • Molecular Beam Epitaxy (MBE)
  • Near Edge X-ray Absorption Fine Structure (NEXAFS)
  • Oxide Quantum Dots
  • Synthesis
  • X-ray Photoelectron Spectroscopy (XPS)

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Thevuthasan, S., Nachimuthu, P., Kim, Y. J., Lyubinetsky, I., Lea, A. S., Shutthanandan, V., ... Lindle, D. W. (2003). Surface and interface characterization of self-assembled copper oxide quantum dots on SrTiO 3(001) surface. In M. Laudon, & B. Romanowicz (Eds.), 2003 Nanotechnology Conference and Trade Show - Nanotech 2003 (Vol. 3, pp. 278-281)

Surface and interface characterization of self-assembled copper oxide quantum dots on SrTiO 3(001) surface. / Thevuthasan, S.; Nachimuthu, P.; Kim, Y. J.; Lyubinetsky, I.; Lea, A. S.; Shutthanandan, V.; Engelhard, M. H.; Baer, D. R.; Shuh, D. K.; Lindle, D. W.

2003 Nanotechnology Conference and Trade Show - Nanotech 2003. ed. / M. Laudon; B. Romanowicz. Vol. 3 2003. p. 278-281.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Thevuthasan, S, Nachimuthu, P, Kim, YJ, Lyubinetsky, I, Lea, AS, Shutthanandan, V, Engelhard, MH, Baer, DR, Shuh, DK & Lindle, DW 2003, Surface and interface characterization of self-assembled copper oxide quantum dots on SrTiO 3(001) surface. in M Laudon & B Romanowicz (eds), 2003 Nanotechnology Conference and Trade Show - Nanotech 2003. vol. 3, pp. 278-281, 2003 Nanotechnology Conference and Trade Show - Nanotech 2003, San Francisco, CA, 23/2/03.
Thevuthasan S, Nachimuthu P, Kim YJ, Lyubinetsky I, Lea AS, Shutthanandan V et al. Surface and interface characterization of self-assembled copper oxide quantum dots on SrTiO 3(001) surface. In Laudon M, Romanowicz B, editors, 2003 Nanotechnology Conference and Trade Show - Nanotech 2003. Vol. 3. 2003. p. 278-281
Thevuthasan, S. ; Nachimuthu, P. ; Kim, Y. J. ; Lyubinetsky, I. ; Lea, A. S. ; Shutthanandan, V. ; Engelhard, M. H. ; Baer, D. R. ; Shuh, D. K. ; Lindle, D. W. / Surface and interface characterization of self-assembled copper oxide quantum dots on SrTiO 3(001) surface. 2003 Nanotechnology Conference and Trade Show - Nanotech 2003. editor / M. Laudon ; B. Romanowicz. Vol. 3 2003. pp. 278-281
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abstract = "Copper oxide quantum dots (QDs) were grown in various thicknesses on different SrTiO 3(001) surfaces and were characterized using various surface and bulk sensitive techniques. The experimental growth conditions were optimized to obtain Cu 2O as the major phase in these structures. The copper oxide QDs grown on clean SrTiO 3(001) surfaces at 825 K or higher with p(O 2) of 9.0×10 -7 Torr or above contain mostly Cu(II) in contrast to those grown at 800 K with p(O 2) of ∼7.0×10 -7 Torr that contain primarily Cu(I). Furthermore, it has been established that there is a strong interaction between the SrTiO 3(001) surface and the first few monolayers of these nano structures, which induces the formation of Cu(II). However, this interaction is mitigated with increasing thickness of copper oxide QDs resulting in the exclusive formation of Cu 2O in the topmost layers. Modification of substrate surfaces using chemical treatment and/or energetic Au 2+ ion-beam irradiation affects the formation of these structures.",
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AU - Thevuthasan, S.

AU - Nachimuthu, P.

AU - Kim, Y. J.

AU - Lyubinetsky, I.

AU - Lea, A. S.

AU - Shutthanandan, V.

AU - Engelhard, M. H.

AU - Baer, D. R.

AU - Shuh, D. K.

AU - Lindle, D. W.

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N2 - Copper oxide quantum dots (QDs) were grown in various thicknesses on different SrTiO 3(001) surfaces and were characterized using various surface and bulk sensitive techniques. The experimental growth conditions were optimized to obtain Cu 2O as the major phase in these structures. The copper oxide QDs grown on clean SrTiO 3(001) surfaces at 825 K or higher with p(O 2) of 9.0×10 -7 Torr or above contain mostly Cu(II) in contrast to those grown at 800 K with p(O 2) of ∼7.0×10 -7 Torr that contain primarily Cu(I). Furthermore, it has been established that there is a strong interaction between the SrTiO 3(001) surface and the first few monolayers of these nano structures, which induces the formation of Cu(II). However, this interaction is mitigated with increasing thickness of copper oxide QDs resulting in the exclusive formation of Cu 2O in the topmost layers. Modification of substrate surfaces using chemical treatment and/or energetic Au 2+ ion-beam irradiation affects the formation of these structures.

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