www.nanopicoftheday.org
July 25, 2004
Atomic Sash
Source: Yasuhiro
Mazaki
References:
"Phase Transition of a Single Sheet of Sashlike
Polydiacetylene Atomic Sash on a Solid Surface"
Osamu Endo, Hiroaki Ootsubo, Naoya Toda, Masanori Suhara, Hiroyuki Ozaki,
Yasuhiro Mazaki. J.Am. Chem. Soc..; 2004; ASAP Web Release Date:
23-Jul-2004;
Description:
The phase transition of sashlike polydiacetylene (PD) atomic sash
in an extrathin (0.4 nm) vapor-deposited monolayer on a graphite (0001) surface
has been observed by in-situ scanning tunneling microscopy (STM). The
conformation of the atomic sash composed of a row of lying alkyl chains stitched
up with a PD chain is different around the crossing points of the alkyl and PD
chains in the two phases, and hence the contrast of the STM image is different
in the middle of the sashes. The difference is associated with the color
transition of bulk PDs.
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