Abstract
Abstract We show that aqueous inks containing Au nanocrystals that were slightly modified with mercaptosuccinic acid (MSA, IUPAC name: sulfanylsuccinic acid) turn into conductive films after being cured in room-temperature air. Because of the highly hydrophilic nature of MSA, the nanoparticles maintain good dispersion in water. The conductive film exhibits an electrical resistivity in the order of 10−5 Ω cm, and its temperature coefficient in the range from 290 to 20 K was 7 × 10−5 K−1 without any post-treatments such as annealing, light irradiation, or solution-immersing processes.
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