[Spm] blunt pyramidal tips

[Igor Sokolov]

Dear Valeria,
This really depends on how blunt you need, and what you define as a blunt
pyramid.. Wearing SiN against SiN is probably the fastest way.
I do not know your goals, but for many applications, it might be beneficial
to have a well defined geometry, like parabolic of rotation or a sphere. To
get a sphere, you can glue it (relatively simple method). To get a
parabolic, you can use a also fairly simple method we used in [Journal of
Colloid and Interface Science, 300 (2006) 475-481] base don oxidation of
silicon tip to silica. We got R~250 nm by using that method.
Best regards,
Igor


_____________________________________
Igor Sokolov, Ph.D.
Director of Nano-Bio Laboratory (NABLAB), Clarkson University,
Professor,
Department of Physics, 
Department of Chemical and Biomolecular Science,
Clarkson University,
NY Center for Advanced Materials Processing,
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/
		   http://www.clarkson.edu/~nablab 
______________________________________

-----Original Message-----
From: valeria.cassina at unimib.it [mailto:valeria.cassina at unimib.it] 
Sent: Friday, July 25, 2008 11:42 AM
To: spm at spmlist.di.com
Subject: [Spm] blunt pyramidal tips

Dear Colleagues,
I'm looking for blunt pyramidal tips for cell elasticity measurements, can
you suggest me where to buy it?

thank you
Valeria
____________________________________________

Dott. Valeria Cassina

Dipartimento di Medicina Sperimentale
Facolta' di Medicina e Chirurgia
Universita' di Milano - Bicocca
Via Cadore 48
20052 Monza (Milano)
Italy

Tel:                    +39-02-6448 8243
Fax:                     +39-02-6448 8068
E-mail:          valeria.cassina at unimib.it
____________________________________________