BY MERCY N' OFFOR, PhD'

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BY MERCY N. OFFOR, PhD.
NANOPLATING

• A TEACHING MODULE
• For 9th grade
• DuSable Leadership Academy
• May 22, 2007

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DUSABLE LEADERSHIP ACADEMY
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TOPICIntroduction to nanotechnology

• OBJECTIVES
• Students will
• define terms used in nanotechnology
• learn about the immense benefits and risks
• perform an experiment on electroplating
• tie and dye fabrics with spray guns

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PRESENTATION / LESSON OUTLINE

• SUBJECT Environmental Science
• Topic Introduction to Nanotechnology
• Objectives
• Ice breaker/ Do now
• Student Engagement
• Conclusion/ Results/Report of experiments
• Homework

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ICE BREAKER / DO NOW( Definitions)

• Define the following terms
• Nanoscale having dimensions measured in
  nanometers
• Nanometer one billionth of a meter
• Nanogram one billionth of a gram
• Nanosecond one billionth (10-9 ) of a second

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NANOBACTERIA

• the smallest known self-replicating organism
• about 100 times smaller than regular bacteria
• Have been implicated in diseases such as heart
  disease, kidney stone and HIV

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Definitions - continued

• Nanotechnology the science and technology of
  building electronic circuits and devices from
  single atoms and molecules
• Nanotechnology entails the construction of
  materials on the scale of atoms and molecules
• Nanotechnology typically deals with particles and
  structures larger than 1 nanometer, but smaller
  than 100 nanometers

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Definitions - continued

• To put the definition of nanotechnology in
  perspective,
• A human hair is approximately 80,000 nanometers
  in width
• A nanometer size particle is 3 times the
  diameter of a gold atom and a very small fraction
  of the size of a living cell

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Nanofabrics - definition

• Nanofabrics are
• specialized fabrics, products of polymer
  chemistry and nanotechnology
• new textiles which tap polymer science to both
  trap and kill toxins all while wicking away
  sweat

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Nanofabrics - goals

• Researchers are creating a new generation of
  clothes which
• more than look fashionable
• resist stains, thanks to coatings made of
  nanowhiskers
• trap microbes using nanoparticles, and so are
  odor-eating
• use porous membranes to stop bacterial
  penetration in biological warfare

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Nanotechnology - Exposition

• Nanotechnology has gained public recognition
  in recent times as it
• plays an increasing significant role in the
  field of electronics, chemistry, biology, physics
  and materials science
• is providing solutions to problems in
  microelectronics, medicine, and material design

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Nanotechnology and the Environment

• New nanomaterials and nanotechnology products are
  entering the market each week
• An adequate oversight system is necessary to
  identify and minimize adverse effects of
  nanomaterials and products on health or
  environment

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STUDENT ENGAGEMENT

• Students work in their various groups to perform
  the experiment on Electroplating

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MATERIALS

• 2.0M HCl
• Zinc strip
• Electroplating Solution zinc sulfate, sodium
  hydroxide, and glycerine
• Voltmeter
• A cup of pennies
• Beakers

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PROCEDURE

• Each penny was cleaned by dipping into the 2.0M
  HCl
• The penny was attached to the negative (black)
  lead from the power source
• A cut piece of zinc was attached to the positive
  (red) lead
• Both penny and zinc were submerged into the
  electroplating solution

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RESULTS

• Tiny bubbles surround the penny as displaced zinc
  ions deposit on the penny
• The brown cupper coated penny quickly turns
  shinny grey as it becomes zinc plated

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RESULTS CONTD.

• Students display their electroplated pennies

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STUDENTS EXPERIMENT
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EXPERIMENT AND HAVE FUN
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WORK IN PAIRS ON TYE AND DYE
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NANOFABRICS
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MORE ON TYE AND DYE