Michael is absolutely correct.  Water is as polar as anything you can find
in nature.  It depends on what kind of substrate you are using.

*******************************************************************************
Rajib Ahmed
347 Hopeman Engineering Building
Department of Electrical and Computer Engineering
University of Rochester
Rochester, NY 14627-0167
Email:rajib@ece.rochester.edu
Phone#:(585)275-8093
Fax#:(585)273-4919
*******************************************************************************

On Tue, 22 Aug 2006, Michael D Martin wrote:

> LOL, Lin. I think you are asking the wrong question.  Water is one of
> the most polar molecules in nature. You should consider modifying the
> suface of your substrate to make it more polar.  This is typically done
> by vapor deposition of a polar molecule onto the substrate.  Bill
> Moffet, can you comment on the particulars?