Nanotechnology: From Lab Bench to Classroom Marina Damiano Northwestern University Michael Davis...
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![Page 1: Nanotechnology: From Lab Bench to Classroom Marina Damiano Northwestern University Michael Davis Wilbur Wright College 2013 STEM Summit – Stevenson High.](https://reader035.fdocuments.in/reader035/viewer/2022070400/56649e4e5503460f94b44cd8/html5/thumbnails/1.jpg)
Nanotechnology: From Lab Bench to Classroom
Marina Damiano Northwestern University
Michael Davis Wilbur Wright College
2013 STEM Summit – Stevenson High School
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NANO 101
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Nano Means “Dwarf”Prefix Measurement
Scientific Notation
Kilo- 1000 m 1 x 103 mHecta- 100 m 1 x 102 mDeka- 10 m 1 x 101 mBASE 1 m 1 x100 mDeci- 0.1m 1 x 10-1mCenti- 0.01 m 1 x 10-2 mMilli- 0.001m 1 x 10-3 m
Micro- 0.000001 m 1 x 10-6 m
Nano-0.000000001
m1 x 10-9 m
Pico-0.0000000000
01 m1 x 10-12 m
Femto-0.0000000000
00001 m1 x 10-15 m
http://education.mrsec.wisc.edu/Edetc/nanoscale/index.html
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Sears Tower (0.5 km)
Child (1 m) Sugar cube(1 cm)
Dime (1 mm)
Bacteria(10 µm)
Virus (40nm) DNA (2 nm) Atoms (< 1 nm)
NANOSCALE (1-100 nm)
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Nano Size = Special Properties
Bulk Gold Nano Gold
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Nanotechnology Is Not A New Idea
Lycurgus Cup, 4th century
Stained Glass,6th-15th centuries
Damascus Swords,13th-18th centuries
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Now Nanomaterials Are Everywhere!
Liquid Crystal Display
Computer Chips
Sunblock
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Medicine Energy
Security Environment
NANO
Applications of Nanotechnology
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WHY TEACH NANOTECHNOLOGY?
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NANOTECHNOLOGY CLASSROOM APPLICATIONS
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Interdisciplinary
NANOTECH
Physics
Biology
Chemistry
MaterialsScience
Engineering
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Nano Printing Press – Micro contact Printing
• A technique for modifying surfaces with a high degree of control.
• Hydrophobic and hydrophilic regions on a gold surface (CDRs)
• Inexpensive method to demonstrate a simple process.
• Commonly used technique for surface modification.
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Nano Printing Press – Microcontact Printing
• Expose a gold surface on a CDR.
• Pattern the surface with a hydrophilic organic molecule.
• Dip the patterned surface in a solution with a hydrophobic organic molecule.
• Dry the surface.• Cool the surface below the
dew point.• Observe the areas where
water condenses.
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Nano Printing Press
• Science is based on a strong bond between gold and sulfur (thiol).
• Long organic molecule ends in something either hydrophilic or hydrophobic.
• Microcontact printing uses a stamp made by pouring an elastic polymer over a mask.
• Finer mask, finer features, more control.
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Lithographic Techniques – Solar Photography
• Photo sensitive paper– Mixture of iron salts
• Place an opaque object over the paper.
• Expose the paper to light.– Opaque objects block out
the light and expose the rest of the salts.
– Exposed iron salts form an insoluble salt.
– Unexposed salts are water soluble.
• Remove the object.• Wash.
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Lithographic Techniques in Nanotechnology
• Techniques that build nanostructures or arrays.
• Bottom – up approach– Prepare areas on a surface– Utilize self assembly to
build up from that point.
• Top – down approach– Prepare a surface and etch
into it.– Can involve some light
based photochemistry.
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Scanning Tunneling Microscope
• A very sharp tip is brought near a surface.
• A voltage is applied between the surface and tip.
• Current is measured on the surface to determine the size and shape of features.
• STM can resolve features that are 0.1nm wide and 0.01nm high.
• Atomic resolution.
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Atomic Force Microscopy (AFM)
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Nano-Analogy
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Nano – Analogy
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Nano in the Environment
• Nanoparticles being made end up being released into the environment.
• Unicellular and multicellular organisms pick up the particles.
• Silver nanoparticles are antimicrobial.
• What are the long term effects of exposure?
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Nano in Commercial Products
• Sunscreen (TiO2 and ZnO)
• Silver in bandages.• Silver in plastic food
containers.• Nanoscale fabrics on
stainresistant clothing.• Carbon nanotubes in
sporting equipment.• Particles in stained glass.
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Nano-Imagination - Robots
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Nano-Imagination – Robots in the Blood
False – Blood Robots True – Nanoparticles to Treat Tumors
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Nanotechnology Resources• NISE-Net: Network of Informal
Educators and Researchers (nisenet.org).
• MRS Nano Days:Free digital and physical activities for kids and adults. (nisenet.org/nanodays)
• National Lab Day: Localized resources for teachers. (Nationallabnetwork.org)
• Nanohub: Online resource for computational nanotech (nanohub.org)
• iLabcentral: Forum for shared instrumentation. Nanotech coming. (ilabcentral.org)
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Nano Resources Students - REU
• Summer Research Experience for Undergraduates.
• Spend the summer working in a lab group.
• Potential for a publication.• 8 – 10 weeks.• On campus housing• Stipend ~$4,500• REU sites all over the US• Applications due in Feb.
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Nano Resources Teachers - RET
• Research Experience for Teachers
• Spend the summer working in a lab group.
• Potential for a publication.• 8-10 weeks.• On campus housing
(sometimes available).• Stipend ~$6,000 - $8,000• Some college credit may be
available.• RET Sites all over the US.• Applications typically due in
Feb / March.• RETnetwork.org
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Acknowledgements
Shuo Yang, PhD
Heng Zhang, PhD
C. Shad Thaxton, MD PhD
Leo I. Gordon, MD
Margaret Connolly
Michelle Paulsen