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Here are Todays Great Etch Glass Deals
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More Great Information on Etch Glass:
Tiny stamps for tiny sensors (MIT)
Advances in microchip technology may someday enable clinicians to perform
tests for hundreds of diseases — sifting out specific molecules, such as early
stage cancer cells — from just one drop of blood. But fabricating such “lab-
on-a-chip” designs — tiny, integrated diagonistic sensor arrays on surfaces as
small as a square centimeter — is a technically challenging, time-consuming
and expensive feat.
Now, an MIT researcher — together with colleagues at the University of
Illinois at Urbana-Champaign — has come up with a simple, precise and
reproducible technique that cuts the time and cost of fabricating such
sensors. Nicholas Fang, associate professor of mechanical engineering, has
developed an engraving technique that etches tiny, nano-sized patterns on
metallic surfaces using a small, voltage-activated stamp made out of glass.
Fang says the engravings, made of tiny dots smaller than one-hundredth the
width of a human hair, act as optical antennae that can identify a single
molecule by picking up on its specific wavelength.
“If you are able to create an optical antenna with precise dimensions … you
can use them to report traffic on the molecular scale,” Fang says.
The researchers reported the new fabrication process in the Sept. ...
Hydrofluoric acid is a substance used to etch glass. Determine the mass of 4.95 x 10^25 HF molecules?
can you please explain to me how to figure this out? you don't need to give me the answer, just explain it? thanks
Here's what you need to do.
Take 4.95 x 10^ 25 and divide it by avogadro's number. This gives you an answer of 8.22, which is how many moles of hydrogen fluoride you have. The molar mass of hydrogen fluoride is 20.01. Multiply 20.01 by 8.22 and this is how much hydrogen fluoride you have, which is 164.48 grams.
Hope this helps.