| 摘要 |
PROBLEM TO BE SOLVED: To provide a metal nanoparticle which has a sharp absorption spectrum and is suitably used for a localized plasmon resonance (LPR) sensor, and to provide a production method therefor. SOLUTION: The method for producing the nanoparticle which includes gold, silver or both of them and has a sharp absorption spectrum due to modification comprises the steps of; preparing a reaction liquid containing a metal salt dissolved in a reductive aqueous solution; and applying an ultrasonic wave to the reaction liquid to produce the nanoparticle. Thus, produced nanoparticles have particle sizes of 5 to 100 nm, include a triangular particle with one side having a length of about 40 nm, have a particle size distribution in which a sharp vertex exists in the vicinity of 40 nm, and are used for an LPR sensor. The production method can produce the nanoparticle including gold, silver and both of them, which has the sharp absorption spectrum due to the modification and a primary particle diameter of a nanometer size, and can be supplied for the plasmon resonance sensor. COPYRIGHT: (C)2008,JPO&INPIT
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