[Spm] Mica surface charge

[Yang Gan]

Dear Xu,

Please specify the types of mica you used and experimental conditions (in aqueous solution? pH, salt concentrations). And how did you measure the surface charge of mica? by AFM force titrations or other methods? And what kind of AFM probes you are using and how they are treated before measurements if you are using AFM force titration methods? 

Regards,
Yang

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Yang Gan
Professor, PhD
Department of Catalysis Science & Engineering (Prep.)
School of Chemical Engineering & Technology
Harbin Institute of Technology
No.92, West Da-Zhi Street, Harbin
Heilongjiang 150001
P. R. China
Tel: +86-451-86403239
E-mail: ygan at hit.edu.cn
Web: http://3www.hit.edu.cn/experts/prof.asp?id=1182
Section editor: Chemistry Central Journal (CCJ) (indexed by ISI, PubMed Central, Scopus, CAS and Google Scholar)
Home page of CCJ: http://journal.chemistrycentral.com
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Message: 2
Date: Mon, 15 Dec 2008 16:46:15 -0500
From: "J. Xu" <xxxuuu at gmail.com>
Subject: [Spm] Mica surface charge
To: spm at spmlist.di.com
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<6ff3f0e0812151346g7af4a2f9h630af3536c3b8b37 at mail.gmail.com>
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hi all.

Anyone has experience with mica surface charge? (e.g. freshly peeled,
positive or negative, is it stable/consistent)

Some of my recent exp. shows it may be positively charged instead of
previously believed to be negatively charged...

Thanks,
-- 
Nanotech West Laboratory
Center for Affordable Nanoengineering of Polymer Biomedical Devices
Department of Chemical and Biomolecular Engineering
The Ohio State University
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