UFRGS, PUCRS, UFPR, UFSC South

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UFRGS, PUC-RS, UFPR, UFSC (South)
USP, UNICAMP, LNLS, INPE, UFSCAR (SP)
UFRJ, UFF, UERJ, PUC-RIO, CBPF (RJ)
UFMG, CETEC-MG, CDTN/CNEN, UFSJ, UFU, UFV (MG)
UFBA, UNIT/SE, UFPE (Northeast)
23 institutions 150 RESEARCHERS
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Phase 1 Search for prospective collaborations,
2002-2003

• Visits
• Workshops
• Nano-objects
• Magnetic Nanostructures
• Nanostructured Semiconductors
• Nanostructured Materials
• Theoretical Modelling of Nanostructured
  Materials

Phase 2 Support of specific projects, 2003-...

• 1st call for proposals with well-defined focus

• 7 projects were selected

- Nano-objects M Pimenta et al.
- Self-assembled quantum dots GM Ribeiro et al.
- Structure and magnetism of epitaxial 3d metals
WA Macedo et al.
- Study of Nanosystems by Magnetic Circular
Dichroism (MCD) with synchrotron light AR
Brito et al.
- Nitrogen-incorporated high-k dielectrics IJR
Baumvol et al.
- Alternative semiconducting materials for
optoelectronics WN Rodrigues et al.
- Self-organized quantum dots R Prioli et al.

• 2nd call for proposals (recently announced)

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Phase 1 Search for prospective collaborations,
2002-2003 kUS 200
Steering committee
1 general coordinator (I Baumvol)
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vice-coordinators (JA Brum H Chacham)
5 members (RR dos Santos,
A Fazzio, M Knobel,
F Lazaro, WN
Rodrigues, D Ugarte)
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Phase 2 Support of specific projects since 2003
ongoing 7 projects
kUS 450 30, 140
collaborative missions kUS 50
new projects (3 or 4)
kUS 180 Steering committee
1 General coordinator
(D Ugarte) 2
Vice-coordinators (R R dos Santos H
Chacham) 7 Members (IJR
Baumvol, AR Brito, A Fazzio,
M Knobel, F Lazaro, R
Prioli,
WN Rodrigues)
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I. Nano-objects
Effects of interaction between carbon nanotubes
and organic molecules
Marcos A. Pimenta (Coord.),  UFMG, UFRJ,
CDTN/CNEN, LNLS
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I. Nano-objects
Self-sustained semiconducting nanowires

• Objectives
• Catalictic growth of nanowires.
• Study of 1D self-sustainable heterostructures
• Study of optoelectronic and
• eletromechanic nanodevices based
• on nanowires.
• Development and study
• of bio-sensors.

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I. Nano-objects
Laboratory of Nanofabrication
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II. Self-assembled quantum-dots
Gilberto Medeiros Ribeiro (Coord.),  LNLS, UFMG,
UNICAMP, USP
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3D mapping of Ge and Si by X-ray diffraction
II. Self-assembled quantum-dots
Nanolitography by AFM
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III. Structure and magnetism of epitaxial systems
Waldemar Macedo (Coord.), CDTN/CNEN, UFMG, UFPA,
USP, UFPE, UFRGS, CBPF
Iron monolayers on ZnSe/GaAs(100)
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III. Structure and magnetism of epitaxial systems
Exchange bias in FM/AFM bi-layers
Modification of the exchange bias HE in
Fe/FeF2(110)/MgO(100) bi-layers after diverse
Fe and He implantation doses HE before (?) and
after (?) implantation
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III. Structure and magnetism of epitaxial systems
magnetic anisotropy in epitaxial films
Magnetic Anisotropy in Fe FMR measurements in 50
Å Fe(110)/MgO(110) (resonance field angle)
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IV. Self-organized quantum dots
Rodrigo Prioli (Coord.),  PUC/Rio, UFRJ
AFM created template on the InP buffer layer
AFM view of InAs QD grown by MOVPE on InP
Hole distance 500 nm
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V. High-K dielectrics
IJR Baumvol (coord.) UFRGS, USP, PUC/Rio, UFMG
MOSFET devices
INTEGRATION A ? 0 C constant x ? 0 Þ
current leakage
Possibilities increase k (c.f., kSiO2 ?
4) SiOxNy replacing SiO2 or new high-k
dielectrics e.g. Al2 O3 (k12), ZrSiO (k
10-16), HfSiO (k 12-18), HfO2 (k 20)
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V. High-K dielectrics

• Aim Detailed study of N incorporation into
  high-k oxides
• routes to incorporation
• atomic transport and thermal stability of N
• chemical status (solid solution? composites?) and
  
• its relation with measured k values
• N ? O exchange mechanisms in an O-rich
• atmosphere

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VI. Iron silicides
WN Rodrigues (coord.) UFMG, LNLS
b-FeSi2 direct-gap, 1.5 mm

• 60 nm films prepared by
• Solid Phase Epitaxy SPE, or
• Reactive Deposition Epitaxy -RDE

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VI. Iron silicides
Mössbauer Spectroscopy
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VI. Iron silicides
X-ray photoelectron spectroscopy
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VI. Iron silicides

• Best conditions for beta phase
• RDE _at_700oC
• 2h annealing _at_ 700oC

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Expectations for a France-Brazil collaboration in
nSc

• Enhancement in exchange of students, post-docs,
  professors and technicians
• additional funds should be channelled to existing
  bilateral agreements (e.g., CNPq/CNRS or
  CAPES/COFECUB)
• more agile processing of applications.
• joint workshops

• Donation of equipment by French labs/companies

• Joint patents