화학공학소재연구정보센터
Thin Solid Films, Vol.562, 648-652, 2014
Plasmonic cyclohexane-sensing by sputter-deposited Au nanoparticle array on SiO2
We have examined the plasmonic sensing ability of Au nanoparticle (NP) arrays for dilute cyclohexane. Au NP arrays were fabricated on SiO2 by a sputter deposition technique. The change in an extinction spectrum of Au NP arrays before and after exposure of cyclohexane vapor enabled us to detect it. The Au NP array prepared with 4.4 x 10(16) Au atoms/cm(2) by heating at 300 degrees C was densely arranged on the substrate and exhibited a high sensitivity for cyclohexane. The experimentally detectable concentration of cyclohexane was as low as 0.5 vol%, much lower than its explosion limit (1.3 vol%). Furthermore, the detection limit was estimated to be similar to 0.3 vol%, which was approximately one fourth of the explosion limit. (C) 2014 Elsevier B.V. All rights reserved.