Liquid medium for preventing charge-up in electron microscope and method of observing sample using the same

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United States of America Patent

PATENT NO 7880144
SERIAL NO

12223012

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Abstract

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An object of the present invention is to provide a medium; a specimen; a method for preparing the specimen; a method for observing the specimen; a sample cell; and an electron microscope capable of easily solving the problem of charge-up and further capable of observing a real shape or the like of a sample with a SEM, a TEM or the like. For the purpose of achieving the above-described object, the present invention uses an electrical conductivity-imparting liquid medium, for use in a microscope, which includes an ionic liquid as an essential component thereof and is impregnated into the entirety of a SEM or TEM sample or applied to the observation surface of a SEM or TEM sample to impart electrical conductivity at least to the observation surface of the sample. According to the present invention, the charge built up on the sample surface can be released simply by impregnating or coating the sample with the ionic liquid, and hence the problem of charge-up can be easily solved. Further, even when a sample impregnated or coated with the ionic liquid is placed under vacuum, the ionic liquid is not evaporated from the sample, and hence a biological sample can be observed as it is in an original shape.

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Patent Owner(s)

Patent OwnerAddress
HITACHI HIGH-TECH CORPORATION17-1 TORANOMON 1-CHOME MINATO-KU TOKYO 1056409 ?1056409

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kuwabata, Susumu Ibaraki, JP 57 473
Torimoto, Tsukasa Nagoya, JP 43 152

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