SimRUC
Surface & Interface Modeling
for Emerging Nanomaterials and Devices

Stable, reproducible nanorecording on rotaxane thin films

Min Feng,† Xuefeng Guo,‡,§ Xiao Lin,† Xiaobo He,† Wei Ji,† Shixuan Du,† Deqing Zhang,‡ Daoben Zhu,‡ and Hongjun Gao*,†

† Institute of Physics.

‡ Institute of Chemistry.

§ Current address: Department of Chemistry, Columbia University.
† Institute of Physics.
‡ Institute of Chemistry.
§ Current address: Department of Chemistry, Columbia University.
§ Current address: Department of Chemistry, Columbia University.† Institute of Physics.
‡ Institute of Chemistry.
§ Current address: Department of Chemistry, Columbia University.

DOI:10.1021/ja054836j    Publication Date: 14 Oct 2005


Abstract:

Nanometer-scale recording on organic thin film media is a promising alternative to future ultrahigh-density information storage. Scanning probe microscope (SPM) has been demonstrated to be an important tool in recording the nanometer patterns on functional organic thin films. For practical applications, functional organics should possess stable switching properties in ambient conditions. Rotaxanes represent a new class of the super molecules and show stability at various chemical states in solution. The key structure of the molecules contains a ð-electron-deficient macrocycle that is locked around a ð-electron-rich component along the molecular “thread” with two bulky “stoppers”. The macrocycle can move between different ð-electron-rich components upon external stimuli, resulting in switching of electronic configuration. This makes rotaxane an interesting candidate for nanorecording. In this communication, we report on stable conductance transitions in solidstate rotaxane-based Langmuir-Blodgett (LB) thin films. Using scanning tunneling microscope (STM), we have achieved reproducible nanometer-scale recording on these films.

nanometer-scale recording on these films.
nanometer-scale recording on these films.Nanometer-scale recording on organic thin film media is a
promising alternative to future ultrahigh-density information storage.
1 Scanning probe microscope (SPM) has been demonstrated to
be an important tool in recording the nanometer patterns on
functional organic thin films.2 For practical applications, functional
organics should possess stable switching properties in ambient
conditions.3 Rotaxanes represent a new class of the super molecules
and show stability at various chemical states in solution.4 The key
structure of the molecules contains a ð-electron-deficient macrocycle
that is locked around a ð-electron-rich component along the
molecular “thread” with two bulky “stoppers”. The macrocycle can
move between different ð-electron-rich components upon external
stimuli, resulting in switching of electronic configuration.4a This
makes rotaxane an interesting candidate for nanorecording. In this
communication, we report on stable conductance transitions in solidstate
rotaxane-based Langmuir-Blodgett (LB) thin films. Using
scanning tunneling microscope (STM), we have achieved reproducible
nanometer-scale recording on these films.

Keywords:


View: J. Am. Chem. Soc.  127, 15338 (2005)     Local Copy

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