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Stable bit formation in polyimide Langmuir–Blodgett film using an atomic force microscope (2002)

Yano, K. ; Ikeda, T.

Woodbury, NY : American Institute of Physics (AIP)

Applied Physics Letters 80 (2002), S. 1067-1069

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ISSN: 1077-3118

Source: AIP Digital Archive

Topics: Physics

Notes: Nanometer scale recording bits were stably fabricated in polyimide (PI) Langmuir–Blodgett (LB) films on atomically flat Au (111) surfaces using an atomic force microscope (AFM). The bits are written by voltage application through the AFM probe only until the conductance increases. This method eliminates the influence of the variation in the transition time and therefore the degradation of the tip of the probe. 1 Mbit stable writing can be realized. The overall error rate is less than 2×10−3. The results show that an AFM based memory system with PI LB films is a hopeful candidate to realize a scanning probe microscope based memory system. © 2002 American Institute of Physics.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.1447007

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Ultra-small-angle X-ray and neutron scattering studies on colloidal crystals (2000)

Matsuoka, H. ; Harada, T. ; Ikeda, T. ; [et al.]

Copenhagen : International Union of Crystallography (IUCr)

Applied crystallography online 33 (2000), S. 855-859

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ISSN: 1600-5767

Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001

Topics: Geosciences , Physics

Notes: The formation of colloidal crystals by charged colloidal particles in dispersion at a low ionic strength has been interpreted by the DLVO theory that assumes the electrostatic repulsion between particles to be a dominant factor. However, several recent observations can not be interpreted by the DLVO theory, one of which is our finding obtained by the ultra-small-angle X-ray scattering (USAXS) technique, i.e., the effect of added salt concentration on the interparticle distance in colloidal crystals. We obtained interesting and significant information by the ultra-smallangle scattering techniques on the interparticle interaction, which support the existence of a novel factor.