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Study of Magnetic Nanoparticles
Kok Chin Yi Temasek Junior College SPMS05
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Outline
Properties of Magnetic Nanoparticles
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Applications
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Preparation methods
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Research Methodology
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Results & Discussions Conclusion
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Study of Magnetic Nanoparticles Kok Chin Yi Temasek Junior College - - PowerPoint PPT Presentation
Study of Magnetic Nanoparticles Kok Chin Yi Temasek Junior College - - PowerPoint PPT Presentation
1 Study of Magnetic Nanoparticles Kok Chin Yi Temasek Junior College SPMS05 2 Outline 01 Properties of Magnetic Nanoparticles 02 Applications 03 Preparation methods 04 Research Methodology 05 Results & Discussions Conclusion 3
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Properties of Magnetic Nanoparticles
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Cla lassification of Magnetic Nanoparticles
Ferromagnetic Spinning electric-charged particle that creates a magnetic dipole Super-Paramagnetic 1 domain due to its small size. Easily influenced by external magnetic fields
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Applications
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Preparation methods
Thin Film Deposition
Nanofabrication
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Thin Film Deposition
Magnetron Sputtering: The Ar+ ions bombard the Fe, transferring the momentum to the Fe, causing the Fe to deposit onto the target (Substrate) Pressure: 1.2 x 10-7 Torr ≈ 1.6 x 10-5 Pa
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Nanofabrication
Nanoimprint Lithography Optical Lithography Electron Beam Lithography
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Nanofabrication
Nanoimprint Lithography Optical Lithography Electron Beam Lithography
Electron beam to draw custom patterns on a surface Resolution: <10nm
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Nanofabrication
Nanoimprint Lithography
Creating daughter mold (soft silicon mold) using Master mold. Mechanical approach: High resolution
Electron Beam Lithography
Electron beam to draw custom patterns on a surface Resolution: <10nm
1.Cleanliness of the sample 2.Reusing the daughter mold
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Nanofabrication
Electron Beam Lithography
Electron beam to draw custom patterns on a surface Resolution: <10nm
Optical Lithography
Light sensitive photoresist is exposed by light Resolution: Lowest (2.5microns)
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Research Methodology
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Research Methodology
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Results and Discussions
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Results and Discussions
Resolution
Diameter: 2.5 Microns Technically, there are Magnetic Microparticles.
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Results and Discussions
Problems
After optical lithography After sputtering and removal of resist
Possible reason:
Excess Fe on the substrate knock the particles off during the ultra-sonification process.
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Results and Discussions
Magneticity
VSM results of the MMPs (In-plane; magnetic field parallel to sample surface) VSM results of the MMPs (In-plane; magnetic field perpendicular to sample surface)
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Conclusion
More affordable and reliable method in creating the magnetic particles
Suggestions:
- 1. Add Kapton tape onto the substrate during sputtering
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Thank You for your kind attention
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