Re: STM of conductive layers on glass
From: Luis (luis_at_avoidspam.com)
Date: 02/14/05
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Date: 14 Feb 2005 22:36:09 GMT
I know some groups that do similar things. If you can ensure that the
surface conducts I can't see the reason why it shouldn't work.
drfabius2000@hotmail.com (Bob) wrote in
news:ctb6js01aig@enews1.newsguy.com:
>
> I want to perform an STM measurement on a surface on a glass slide.
> Now glass isn't terribly conductive so over the depth the resistance
> is immense, but the layer will have a resistance of less than 300 ohm
> over the horizontal latitude. Can the surface be touched by copper
> foil or something alike to ensure conduction from the surface to the
> puck for the STM apparatus? It will result in a gradient of voltage on
> the surface depending on the position of the tip. But since typical
> setpoints are like 100 picoampere and 100 millivolt, the tunneling
> resistances are so many orders of magnitude greter than the surface
> gradient that it should work in my point of view. The STM expert
> didn't like my idea though. Anyone have a suggestion?
>
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