[3dem] Metal wire for shadowing experiments

Fang Zhao fang.zhao at helsinki.fi
Tue Jan 19 06:15:08 PST 2010

Hi, Andy:


Theoretically, tungsten or chromium wire gives out thinner coating than gold
and platinum. It can go down to something like 2 nm or less. But the coating
needs cooling, water cooling is OK. 

The former BalTech company, now under Leica, used to have both wire. I
bought both from them eight years ago, not sure the situation now. 


Hope this helps


Best Regards,




Fang Zhao, MD. PhD.

Advanced Microscopy Unit (AMU)

Haartman Institute 

Haartmaninkatu 3

PO Box 21, 00014 University of Helsinki


Tel. +358 9 1912 6261

E-mail:  <mailto:fang.zhao at helsinki.fi> fang.zhao at helsinki.fi

Web:  <http://www.hi.helsinki.fi/amu> http://www.hi.helsinki.fi/amu


From: 3dem-bounces at ncmir.ucsd.edu [mailto:3dem-bounces at ncmir.ucsd.edu] On
Behalf Of Anindito Sen
Sent: 19. tammikuuta 2010 15:13
To: 3dem at ncmir.ucsd.edu
Subject: [3dem] Metal wire for shadowing experiments


Dear all


I am looking for the correct metal (wire) for shadowing experiments to
determine the handedness of my samples (biopolymers). The grain size for
needs to be fairly small. I will be using TMV as a standard for calibration.


Please share your experience with such experiments and the source to
obtain/purchase the metal.


Best Wishes





Dr. Anindito Sen (Ph.D)


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