Transcript Water soluble silver nanoparticles

Connexions
Conference
Feb 5th 2009
My Workgroups: Mary McHale, PhD
Rice University
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Chem215 Spring08
Chem217LabsFall07
General Chemistry Lab Fall
General Chemistry Lab Spring
Honors Chemistry Lab Fall
• Honors Chemistry Spring
How did I hear about Connexions?
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General Chemistry I (col10263)
Author: John S. Hutchinson
Institution: Rice University
Keywords: Chemical concept development,
Freshman Chemistry, General Chemistry,
Introductory Chemistry
• Summary: Concept Development Studies associated
with the first semester of a two semester General
Chemistry course at Rice University
Advantages of Connexions
• For the student: Cost
• Average experiment ~ 10 pages * 5c = 50c
• 10 -12 experiments per semester = $6.00
• For Me: Flexibility
• Ability to update during the semester
• Publish new experiments – copyright
protected
Funniest Interaction
• Professor in Italy:
• Title of email: Your experiment
• Send me key now!
Silver Nanoparticles: A Case Study in
Cutting Edge Research
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Silver Nanoparticles: A Case Study in Cutting Edge Research
Module by: Andrew R. Barron, Mary McHale, Alvin Orbaek
Summary: Based on research performed in the Barron group by graduate student Alvin Orbaek
Links
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Example links
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AgnpPreLab08.doc
AgnpReport08.doc
Silver Nanoparticles – A Case Study in Cutting Edge Research
Alvin Orbaek, Mallam Phillips, Dr. Mary McHale, Prof. Andrew Barron,
Objective
To gain an insight into nanotechnology, what it is and how it can be useful, using silver nanoparticles as an
example. We will look at what exactly nanoparticles are, see how they are made, and how they can be
characterized.
The characterization technique involves Ultra-Violet and Visible spectroscopy, so we will look briefly into
the interaction of the nanoparticles and light, which will hopefully help you gain an appreciation for one of
the special aspects of nanotechnology.
When making the nanoparticles we will do a time study allowing us to graph the spectroscopic response which will show the nature of the particle as it grows, i.e ripens. We can use some data to calculate the
size of the nanoparticle at the beginning and at the end of our experiment.
Uses of Silver Nanoparticles
• No more smelly socks - inhibits bacteria that causes
foot odour by resisting stains and water absorbance
• Antibacterial properties added to athletic wear,
bandages (especially burn victims) and cleaning
products
• Sterilizes water better than chlorine
• Curtains embedded with Ag nanoparticles reduce
infectious microbes in hospitals
• Deactivates HIV by inhibiting the virus from attaching
to the host with undetectable levels of cytoxicity
Seeing is believing
• Tunability
– can make silver nanoparticles with various sizes
– each size can absorb light differently
– can make them for the visible spectrum
Left to Right
10 nm
30 nm
100 nm