[3dem] carbon rods for evaporation

[Svetomir B Tzokov]

Hi Kelly,

We have good results with the Precision Machined Carbon Rods (50/60Hz)  
85001 from Cressington.
http://www.cressington.com/consume.html

Not sure if you could use them on your carbon evaporator, but try them if  
you can.


Kind regards,
Svet




On Fri, 01 Mar 2013 19:22:21 -0000, Kelly Dryden <kdryden at virginia.edu>  
wrote:

> Hi all,
>
> Since Edwards no longer makes them, we have a Ladd carbon evaporator.   
> However, we are having trouble getting the carbon to vaporize.  The rods  
> a slightly thinner than we used previously with an Edwards, and vacuum  
> reaches about 2E-6.  The problem is that I can only get a very thin  
> layer of carbon after 12-15 times of increasing the current nearly to  
> the maximum.  I can't leave it on for too long each time because either  
> the rod will blow, or the apparatus gets so hot the plastic film is  
> damaged.  All the carbon rods we have tried (the originals from Ladd,  
> and from Ted Pella and EMS) appear to be graphite.  I've been unable to  
> determine if this has always been true, or if it is creating the problem.
>
> Any suggestions for helping us get fine-grained carbon coating for our  
> grids will be welcome.
>
> Thanks,
> Kelly
>
>
> *********************************************************
> Kelly A. Dryden, Ph.D.
> Assistant Professor of Research
>
> Dept. of Molecular Physiology & Biological Physics
> School of Medicine, University of Virginia
> Snyder Bldg., Rm. 232
> 480 Ray C. Hunt Dr.
> Charlottesville, VA  22908-0886
>
> office: (434)982-0525  fax: (434)243-8271
> email: kdryden at virginia.edu
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-- 
Svetomir B Tzokov
Electron Microscopy Facility Manager
Krebs Institute for Biomolecular Research
Dept Molecular Biology and Biotechnology
The University of Sheffield
Firth Court, Western Bank
Sheffield S10 2TN
United Kingdom
Tel: +44 (0)114 222 4674
Fax: +44 (0)114 222 4243
Mob: +44 (0)7905 832358
Email: s.b.tzokov at sheffield.ac.uk


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