Molecular Beam Epitaxy of hybrid nanostructured materials

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Waterloo Advanced Technology Laboratory
Biomolecular electronics metal clusters
surface science

• Molecular Beam Epitaxy of hybrid nanostructured
  materials
• Metal clusters on Si
• Low-temperature physical deposition of
  bioorganics self-assembly
• Gas-solid-film reactions
• Atomic imaging nanomanipulation

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Waterloo Advanced Technology Laboratory
Department of Chemistry, University of Waterloo
C2-059-066, 261 www.WATLab.com or
www.nanoOntario.com Contact
Professor Tong Leung - tong_at_uwaterloo.ca

• PROGRAMS
• Site-specific surface chemistry of silicon and of
  ice and of metal oxides
• Biomolecular electronics
• DNA interactions with quantum-sized metal
  clusters
• Nanoparticles magnetic field guided
  nano-processing
• Spintronics dilute magnetic semiconductor
  nanofilms
• Applications of transparent conductive oxides
• Self-assembled bioorganic films
• Biofunctionalization molecular recognition
• Nanomedicine devices

• FACILITIES
• MBE (both HT LT) C2-066 x33077
• PLD MAPLE C2-066
• Electrochemistry C2-061
• Optical spectroscopy fleet C2-061 x35827
• Imaging ESCA C2-064 x33078
• Auger Nanoprobe C2-064
• FE-SEM, EDX, OIM C2-060 x33078
• AFM, (VT-)STM, SPM C2-060
• HR-XRD C2-060 x36827
• E-beam lithography C2-060
• Nano-lithography C2-060
• Surface science UHV techniques C2-061/064
• Chemical physics computational chemistry C2-261

University of Waterloo WATLab - Thermo VG
Scientific ESCALAB 250 Microprobe
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Waterloo Advanced Technology Laboratory
Electron-beam lithography of backgammon
nanoelectrodes for sensor applications
Preliminary work has demonstrated polypyrrole
growth across the electrodes, and the
determination of resistivity of PPY across the
inter-leaving Au fingers. Miniaturization to
100 nm finger width in progress - Questions on
geometry and dimensions of ECD-grown
nanostructures,
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Bionanotechnology of ferritin Development of
hybrid nanostructures nanomedicine devices
SEM reveals the interior Fe core diameter of
7.5 nm. The Fe core (4500 Fe atoms) can be
substituted with different metals (Ni, Co, Fe) to
develop hybrid quantum necklaces of magnetic
nanocontainers.
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Self-assembly of Fe nanorice nanocubes in a
magnetic field

• Clustering of nanorice
• Stripe formation of nanocubes
• All induced in a magnetic field

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Waterloo Advanced Technology Laboratory Dry
fabrication of novel hybrid nanomaterials
Pulsed Laser Deposition of spintronics, DMS,
TCO, nanocomposites and biomedical (MAPLE)
nanofilms
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2D 1D ZnO Nanostructures
0.1 M
0.05 M
0.01 M
0.001 M
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Spintronics CrOx nanostructures grown on
different substrates
PLD-grown CrOx on MgO(100) with O2 pressure of
(a) 400 mtorr and (b) 10 mtorr, and on (c)
Al2O3(0001), (d) SrTiO3(100), (e) LaAlO3(100) and
(f) Si(100) with 400 mtorr O2, all at 480C and
with 550 mJ/pulse laser fluence.
First successful CrO2 growth by direct laser
ablation of Cr metal and reaction with O2 -
CrO2 target not necessary- Need high laser power
precise temperature control