[Spm] RE: Spm Digest, Vol 43, Issue 4(Cantilever holder (Jonathan Armond))

Wed Feb 6 12:03:04 EST 2008

Dear Jon,
We used a very simple method to functionalized the tips/cantilevers, a
method was describe to me by Prof. I.Luzinov from Clemson.
You can use one of the standard glass pipettes, just cut/ break its narrow
and wide ends, and slide you cantilever chip with the cantilever looking
down the pipette narrow end. In this way, the cantilever does not touch the
pipette walls, being reliably secured in the glass cone of the pipette. Now
this is your holder that keeps the chip. You can simply dip it into
fictionalizing solutions. When you washed the cantiveler (just by dipping in
washing solvent), and dried, you can take the cantilever chip out of the
pipette holder with a tweezers..
Hope my explanation makes sense. Otherwise, email me and I will email you a
picture of the setup.
Best regards,
Igor

_____________________________________
Igor Sokolov, Ph.D.
Director of NAno-Bio LABoratory (NABLAB), Clarkson University,
Professor,
Departments of Physics, Chemistry,
Center for Advanced Materials Processing,
Clarkson University,
Potsdam, NY 13699-5820, USA

office:      315-268-2375
fax:         315-268-6610
E-mail:      isokolov at clarkson.edu
Web:         http://www.clarkson.edu/~isokolov/
______________________________________

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Sent: Wednesday, February 06, 2008 4:22 AM
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Subject: Spm Digest, Vol 43, Issue 4

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Today's Topics:

   1. Cantilever holder (Jonathan Armond)
   2. setpoint drift (Beauvais, Muriel)
   3. RE: Force Volume Imaging Format (Igor Sokolov)
      ( philippe.carl at tiscali.fr )

----------------------------------------------------------------------

Message: 1
Date: Tue, 5 Feb 2008 18:07:29 +0000
From: Jonathan Armond <j.w.armond at warwick.ac.uk>
Subject: [Spm] Cantilever holder
To: spm at spmlist.di.com
Message-ID: <200802051807.33494.j.w.armond at warwick.ac.uk>
Content-Type: text/plain; charset="iso-8859-1"

Dear all

Does anyone know a company that makes a device that can hold several
cantilevers in a solution for functionalising?

Cheers

Jon
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Message: 2
Date: Tue, 5 Feb 2008 15:28:06 +0100
From: "Beauvais, Muriel" <Muriel.Beauvais at saint-gobain.com>
Subject: [Spm] setpoint drift
To: <spm at spmlist.di.com>
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Dear Colleagues

When doing friction experiments in water with a Nanoscope 3a (Digital
Instrument), I adjust the setpoint with the force calibration command before
increasing the contact force of the tip (silica sphere of 55m in diameter)
on the sample (hard oxide). A continual drift in the setpoint value appears
during the measurement. How could you explain this drift?  How can I be sure
that for each experiment, same loads are applied to the surface?  

Thank you very much

Muriel Beauvais

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Message: 3
Date: Tue,  5 Feb 2008 14:29:33 +0100
From: " philippe.carl at tiscali.fr " <philippe.carl at tiscali.fr>
Subject: [Spm] RE: Force Volume Imaging Format (Igor Sokolov)
To: " spm " <spm at spmlist.di.com>
Message-ID: <JVRPH9$3B02EA94D9966EB6351942F6B43FA18B at aliceadsl.fr>
Content-Type: text/plain; charset=iso-8859-1

Dear Igor,
Like you reported it, the file format of the Veeco files are different for
each version of the Nanoscope software, and sometimes even within different
releases of the same version.
If you are just interrested in opening your own Nanoscope files this is not
really an issue as long as you are not updating your software.
But if you are developping code that should be able to open all files coming
from all versions of the Nanoscope software this issue becomes quite fast a
huge investment in ressources.
What changes between the different versions is not the binary format like
you supposed, but rather the syntax or the conversion "rules" within the
files.
Indeed, the binary part of the files is coding the data in LSB and its
format is identical between all versions (at least all the ones I went
thru).
But what changes a lot is how to transform these data in LSB into values in
nm.
>From my experience with different formats of files, I always look for the
value into parenthesis that can be found after the parameters:
\@4:Z scale: V [Sens. DeflSens] (
\@4:Z scale: V [Sens. Deflection] (
or \@4:Z scale: V [Sens. TM Deflection] ( I multiply then this value with
the data in LSB in order to tansform the data in V.
And the sensitivity can be found by looking at the parameters after:
\@Sens. Deflection: V
or \@Sens. Amplitude: V
When multiplying the sensitivity by the values obtained before in V, you
transform your data in nm, and then you are all set Please feel free to
contact me for any additional question.
Best regards,
Philippe

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End of Spm Digest, Vol 43, Issue 4
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