Presentation Information
[10a-PA4-2]Effect of DLC Film Thickness on Japanese Sake Sensing
〇(M1C)Rui Kubo1, Hiromichi Moide1, Kenji Mukouyama1, Kenji Hirakuri1, Yasuharu Ohgoe1 (1.Tokyo Denki Univ.)
Keywords:
DLC: Diamond-like Carbon,potential window,film thickness dependence
Toward the development of a low-cost and simple electronic tongue system, we evaluated the effect of diamond-like carbon (DLC) electrode thickness on the sensing performance for Japanese sake. DLC films with thicknesses ranging from 50 to 900 nm were deposited using low-frequency chemical vapor deposition (CVD) and evaluated via cyclic voltammetry (CV). The results showed that substrate interference occurred at film thicknesses of 100 nm or less, whereas this effect was suppressed at 200 nm or more, resulting in a stable and wide potential window. Additionally, we confirmed that the potential window began to shrink at thicknesses of 700 nm and above. By utilizing the 200-nm DLC electrode—the thinnest effective film that avoids substrate effects—we successfully classified five types of Japanese sake with an accuracy of 92%.