BY MERCY N. OFFOR, PhD.A TEACHING MODULEFor 9th gradeDuSable Leadership AcademyMay 22, 2007

DUSABLE LEADERSHIP ACADEMY

TOPIC:Introduction to nanotechnologyOBJECTIVES:Students will define terms used in nanotechnology learn about the immense benefits and risks perform an experiment on electroplatingtie and dye fabrics with spray guns

PRESENTATION / LESSON OUTLINESUBJECT: Environmental ScienceTopic: Introduction to NanotechnologyObjectives:Ice breaker/ Do now: Student Engagement:Conclusion/ Results/Report of experimentsHomework

ICE BREAKER / DO NOW( Definitions)Define the following termsNanoscale having dimensions measured in nanometers Nanometer one billionth of a meterNanogram one billionth of a gramNanosecond one billionth (10-9 ) of a second

NANOBACTERIAthe 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

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

Definitions - continuedTo 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

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

Nanofabrics - goalsResearchers 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

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

Nanotechnology and the EnvironmentNew nanomaterials and nanotechnology products are entering the market each weekAn adequate oversight system is necessary to identify and minimize adverse effects of nanomaterials and products on health or environment

STUDENT ENGAGEMENTStudents work in their various groups to perform the experiment on Electroplating

MATERIALS2.0M HClZinc stripElectroplating Solution zinc sulfate, sodium hydroxide, and glycerine Voltmeter A cup of penniesBeakers

PROCEDUREEach penny was cleaned by dipping into the 2.0M HCl The penny was attached to the negative (black) lead from the power sourceA cut piece of zinc was attached to the positive (red) leadBoth penny and zinc were submerged into the electroplating solution

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

RESULTS CONTD.Students display their electroplated pennies

STUDENTS EXPERIMENT

EXPERIMENT AND HAVE FUN

WORK IN PAIRS ON TYE AND DYE

NANOFABRICS

MORE ON TYE AND DYE