ELFT HÍRADÓ

[HAJNAL Zoltán <hajnal AT mfa.kfki.hu>]

                                MEGHÍVÓ

Az MTA Műszaki Fizikai és Anyagtudományi Kutatóintézete (MFA) és
az MTA Veszprémi Akadémiai Bizottság Nanotechnológiai Munkabizottsága
tisztelettel meghívja Önt és Munkatársait

        *2006. július 20-án (csütörtökön) 11 órakor*

        az MTA MFA Tanácstermében
        (Budapest, XII. Konkoly Thege u. 29-33; KFKI 26. ép. I.em.)

tartandó tudományos előadásra.

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Program:
        *Prof. Ichiro Yamashita*

        Nara Institute of Science and Technology;
        Advanced Tech. Res. Lab., Panasonic Co. Ltd. (Japan)

        *Biological path to nanotechnology and nano-electronic devices*

Abstract:
Biology and semiconductor technologies have progressed independently.
There was a large distance between them and a substantial
interdisciplinary research area was left untouched. Recently, this
situation is undergoing a change. Some researchers are stimulating
semiconductor technology to introduce bio-molecules into the
nano-fabrication process. We proposed a new process for fabricating
functional nano-structure on a solid surface using protein
supramolecules, which is named “Bio Nano Process” (BNP).
As a first try, we employed a cage-shaped protein, apoferritin as a
spatially restricted chemical reaction chamber and synthesized several
kinds of nanoparticles (NP) in the apoferritin cavity. A monolayer of
them was made on the silicon wafer and this array was heat treated or
UV/ozone treated. These processes produced a two-dimensional inorganic
NP array on the silicon surface and a floating nanodots memory using
this NP array was fabricated successfully. We also proposed another
process using the obtained nanodot array as the nanometric etching mask.
This was realized by the neutral beam etching and 7nm diameter Si
nano-crystalline columns with high aspect ratio were fabricated. Another
effort to make a large biotemplate for Single Electron Transistor (SET)
produced a ball and spike type protein supramolecules which has a
central cage-shaped protein and protruding spikes. This bio-template
will be used to produced SET  by combining the biomineralization technique.
These experimental results demonstrated that the BNP can fabricate the
inorganic nanostructure using protein supramolecules and the BNP opened
up a biological path to nanoelectronic devices.

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        Bársony István                  Vonderviszt Ferenc
          igazgató                          mb. elnök
          MTA MFA                           MTA VEAB