[3dem] carbon rods for evaporation

John Mitchels john.mitchels at gmail.com
Thu Mar 7 13:19:59 PST 2013


On 4 March 2013 13:48, Svetomir B Tzokov <s.b.tzokov at sheffield.ac.uk> wrote:

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