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2 Feb 1998

Volume 72, Issue 5, pp. 513-622

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Homogeneous alignment of nematic liquid crystal induced by polyimide exposed to linearly polarized light

Yinghan Wang, Akihiko Kanazawa, Takeshi Shiono, Tomiki Ikeda, Yasuo Matsuki, and Yasumasa Takeuchi

Appl. Phys. Lett. 72, 545 (1998); http://dx.doi.org/10.1063/1.120753 (3 pages) | Cited 19 times

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Homogeneous alignment of a nematic liquid crystal (LC) was induced by a polyimide (PI) film containing diphenyl ether component exposed to linearly polarized light at 366 nm. Ultraviolet-visible absorption spectra showed that the change in the absorption of the PI was very small after exposure; the preliminary result indicated that the homogeneous alignment of a LC could be induced without significant change in the PI structure. © 1998 American Institute of Physics.
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61.30.Eb Experimental determinations of smectic, nematic, cholesteric, and other structures
61.41.+e Polymers, elastomers, and plastics
61.80.Ba Ultraviolet, visible, and infrared radiation effects (including laser radiation)
78.40.Me Organic compounds and polymers
61.82.Pv Polymers, organic compounds

Fabrication of quantum devices by Ångström-level manipulation of nanoparticles with an atomic force microscope

T. Junno, S.-B. Carlsson, Hongqi Xu, L. Montelius, and L. Samuelson

Appl. Phys. Lett. 72, 548 (1998); http://dx.doi.org/10.1063/1.120754 (3 pages) | Cited 39 times

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We describe a technique for the fabrication of lateral nanometer-scale devices, in which individual metallic nanoparticles are imaged, selected and manipulated into a gap between two electrical leads with the tip of an atomic force microscope. In situ, real-time monitoring of the device characteristics is used to control the positions of the particles down to atomic accuracy and to tune the electrical properties of the device during fabrication. Using this technique we demonstrate a nanomechanical switch as well as atomic-scale contacts that are stable at quantized conductance levels on the time scale of hours at room temperature. © 1998 American Institute of Physics.
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81.07.-b Nanoscale materials and structures: fabrication and characterization
81.16.-c Methods of micro- and nanofabrication and processing
85.35.-p Nanoelectronic devices
85.35.Ds Quantum interference devices
61.46.-w Structure of nanoscale materials
07.79.Lh Atomic force microscopes
07.10.Cm Micromechanical devices and systems
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