Re: How to measure the volume of any fluid in nano levels?

From: Nikodem Tomczak (n.tomczak_at_NOSPAM.ct.utwente.nl)
Date: 11/26/04 

Date: 26 Nov 2004 22:54:33 GMT

"Tom Kunich" <cyclintom@yahoo.com> wrote in message
news:co0bhm0i93@enews1.newsguy.com...
> raghuis@gmail.com (raghu) wrote in message
> news:<cnos4p02e91@enews4.newsguy.com>...
>> Looking for an idea to measure the volume of the
>> fluid in nano levels.
>> If i have a drop of liquid, what are the present techniques used
>> to find the volume of it?
>> Even micro level technique is fine for now.
>> Is it only by measuring the weight and knowing the density or
>> are there any better ways to find it?
> If I might make a suggestion: With lenses and cameras as cheap and
> available as they presently are and video algorithms as easily
> obtained, I would think about using two cameras to photograph the nano
> droplet (these are generally round but sometimes they are flattened
> due to surface attractions) and computer imaging to measure the actual
> volume. This has the advantage of not requiring the density which is
> never accurately known for most liquids.
> This system might be presently available somewhere since I don't think
> that I just came up with that off the top of my head.

Hello,

1.Raghu wanted to measure the volume in nano levels. The dimensions of the
drop will be very small (below 10x10x10 nm). Far field optical techniques
are therefore not suitable since they are diffraction limited.

2. Not only the density is not acurately known but it can also very much
different than the in the bulk. 

-- 
Nikodem

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