Nano-magnetic interactionsNano-magnetic interactions
on MnAs thin filmson MnAs thin films
Raphael BouskilaRaphael Bouskila...
09/24/13 R. Bouskila / K. Burch 2
OutlineOutline
 MotivationMotivation
 ObjectivesObjectives
 Description of proposed e...
09/24/13 R. Bouskila / K. Burch 3
MotivationMotivation
 What are we trying to do here?What are we trying to do here?
 We...
09/24/13 R. Bouskila / K. Burch 4
MotivationMotivation
 Example application: BiosensorsExample application: Biosensors
– ...
09/24/13 R. Bouskila / K. Burch 5
MotivationMotivation
 Example: DNA strings ligated to magneticExample: DNA strings liga...
09/24/13 R. Bouskila / K. Burch 6
IntroductionIntroduction
 MnAs: two-phaseMnAs: two-phase
system near RTsystem near RT
–...
09/24/13 R. Bouskila / K. Burch 7
IntroductionIntroduction
α-MnAs
(ferromagnetic)
β-MnAs
(paramagnetic)
09/24/13 R. Bouskila / K. Burch 8
IntroductionIntroduction
 MnAs in profile:MnAs in profile:
GaAs (001) substrate
H
α-MnA...
09/24/13 R. Bouskila / K. Burch 9
IntroductionIntroduction
 Alternatively:Alternatively:
GaAs (001) substrate
H
α-MnAs
β-...
09/24/13 R. Bouskila / K. Burch 10
IntroductionIntroduction
 Goh group (Dept. of Chemistry, UniversityGoh group (Dept. of...
09/24/13 R. Bouskila / K. Burch 11
ObjectivesObjectives
 Proof-of-concept idea:Proof-of-concept idea:
GaAs (001) substrat...
09/24/13 R. Bouskila / K. Burch 12
MethodMethod
09/24/13 R. Bouskila / K. Burch 13
ResultsResults
09/24/13 R. Bouskila / K. Burch 14
ResultsResults
09/24/13 R. Bouskila / K. Burch 15
ResultsResults
09/24/13 R. Bouskila / K. Burch 16
ResultsResults
09/24/13 R. Bouskila / K. Burch 17
Further ideasFurther ideas
 Do different nanowire widths preferentiallyDo different na...
Thanks!Thanks!
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Nano magnetic interactions on MnAs thin films

Research proposal on the interactions of ferromagnetic nanoparticles with MnAs thin films. Published in APL.
Published on: Mar 3, 2016
Published in: Education      Technology      Business      
Source: www.slideshare.net


Transcripts - Nano magnetic interactions on MnAs thin films

  • 1. Nano-magnetic interactionsNano-magnetic interactions on MnAs thin filmson MnAs thin films Raphael BouskilaRaphael Bouskila M.Sc. CandidateM.Sc. Candidate Burch Group, University of TorontoBurch Group, University of Toronto
  • 2. 09/24/13 R. Bouskila / K. Burch 2 OutlineOutline  MotivationMotivation  ObjectivesObjectives  Description of proposed experimentDescription of proposed experiment  Further research ideasFurther research ideas
  • 3. 09/24/13 R. Bouskila / K. Burch 3 MotivationMotivation  What are we trying to do here?What are we trying to do here?  We are studying the interactions ofWe are studying the interactions of ferromagnetic domains on the nanoscaleferromagnetic domains on the nanoscale
  • 4. 09/24/13 R. Bouskila / K. Burch 4 MotivationMotivation  Example application: BiosensorsExample application: Biosensors – Chemical purity measurementsChemical purity measurements – Drug uptake measurementsDrug uptake measurements – Organic molecule selection via functionalizedOrganic molecule selection via functionalized nanoparticlesnanoparticles
  • 5. 09/24/13 R. Bouskila / K. Burch 5 MotivationMotivation  Example: DNA strings ligated to magneticExample: DNA strings ligated to magnetic nanoparticles (e.g., Horák,nanoparticles (e.g., Horák, J. Mag. & Mag.J. Mag. & Mag. Mater.Mater. 311311 249 (2007))249 (2007)) – Specific DNA/RNA strings attach to theSpecific DNA/RNA strings attach to the particles, and then the DNA can be selectedparticles, and then the DNA can be selected out via the properties of the particle attachedout via the properties of the particle attached to itto it
  • 6. 09/24/13 R. Bouskila / K. Burch 6 IntroductionIntroduction  MnAs: two-phaseMnAs: two-phase system near RTsystem near RT – Domain width: ~100Domain width: ~100 nmnm – Period: ~200 nmPeriod: ~200 nm  Can be controlled via:Can be controlled via: – Optical excitationOptical excitation – Ambient temperatureAmbient temperature
  • 7. 09/24/13 R. Bouskila / K. Burch 7 IntroductionIntroduction α-MnAs (ferromagnetic) β-MnAs (paramagnetic)
  • 8. 09/24/13 R. Bouskila / K. Burch 8 IntroductionIntroduction  MnAs in profile:MnAs in profile: GaAs (001) substrate H α-MnAs β-MnAs 60 nm 100 nm
  • 9. 09/24/13 R. Bouskila / K. Burch 9 IntroductionIntroduction  Alternatively:Alternatively: GaAs (001) substrate H α-MnAs β-MnAs 60 nm 100 nm
  • 10. 09/24/13 R. Bouskila / K. Burch 10 IntroductionIntroduction  Goh group (Dept. of Chemistry, UniversityGoh group (Dept. of Chemistry, University of Toronto), produces ferromagneticof Toronto), produces ferromagnetic nanoparticlesnanoparticles – ~10-20 nm diameter~10-20 nm diameter – Composed of iron oxideComposed of iron oxide – Water-solubleWater-soluble
  • 11. 09/24/13 R. Bouskila / K. Burch 11 ObjectivesObjectives  Proof-of-concept idea:Proof-of-concept idea: GaAs (001) substrate H 60 nm 100 nm
  • 12. 09/24/13 R. Bouskila / K. Burch 12 MethodMethod
  • 13. 09/24/13 R. Bouskila / K. Burch 13 ResultsResults
  • 14. 09/24/13 R. Bouskila / K. Burch 14 ResultsResults
  • 15. 09/24/13 R. Bouskila / K. Burch 15 ResultsResults
  • 16. 09/24/13 R. Bouskila / K. Burch 16 ResultsResults
  • 17. 09/24/13 R. Bouskila / K. Burch 17 Further ideasFurther ideas  Do different nanowire widths preferentiallyDo different nanowire widths preferentially trap different sizes of nanoparticle?trap different sizes of nanoparticle?  Could a temperature or optical energyCould a temperature or optical energy gradient sort particles by size?gradient sort particles by size?  Can this method be used as a “poor man’sCan this method be used as a “poor man’s MFM” technique?MFM” technique?  Can this method be used to alignCan this method be used to align nanoparticles into arbitrary patterns?nanoparticles into arbitrary patterns?
  • 18. Thanks!Thanks!