A method for preparing size-controlled gold nanoparticles and colorimetric detection of strong acid using them

摘要

the present invention is the addition of 1,2-dichlorobenzene as a solvent in the gold precursor a surfactant as a weight ratio of oleyl amine and oleic acid 7.5: 2.5 to 5: the hydrophobic gold nanoparticles using a 5 method of manufacturing the same, and the prepared hydrophobic gold nanoparticles hydrophilic gold nanoparticles in the phase change that after the phase transition of a hydrophilic nanoparticles Using relates to colorimetric type strong acid detection method, the gold nano-particles prepared according to the present invention, it is possible to control the particle size over a wide range of bio-imaging, photonic crystals, sensors, organic catalysts, surface enhanced Raman spectrum, electronic devices such as various fields It can be utilized in. In addition, gold nanoparticles used in the strong acid detection as well as to detect even a low concentration of hydrochloric acid to 5 ppm by using the colorimetric type detecting method for detecting an Aqueous hydrochloric acid the phase transition of a hydrophilic nanoparticles, according to the strong acid detection method according to the invention particles may be neutralized by the base to be re-used with no loss of activity. ;