Analytical Sciences

Abstract − Analytical Sciences, 35(6), 619 (2019).

Amplification of Sensor Signals from Metal Mesh Device with Fine Periodic Structure
Hirokazu SETO,*1 Atsushi SAIKI,*1 Seiji KAMBA,*2 Takashi KONDO,*2 Makoto HASEGAWA,*3 Yoshiko MIURA,*4 Yumiko HIROHASHI,*1 and Hiroyuki SHINTO*1
*1 Department of Chemical Engineering, Fukuoka University, 8-19-1 Nanakuma, Jonan, Fukuoka 814-0180, Japan
*2 Murata Manufacturing Co., 1-10-1 Higashikotari, Nagaokakyo, Kyoto 617-8555, Japan
*3 Graduate School of Bioscience, Nagahama Institute of Bio-Science and Technology, 1266 Tamura, Nagahama, Shiga 526-0829, Japan
*4 Graduate School of Engineering, Kyushu University, 744 Motooka, Nishi, Fukuoka 819-0395, Japan
Two types of metal mesh devices with hole diameters of 1.7 and 0.3 μm were prepared by an electroforming method. The metal mesh devices with hole diameters of 1.7 and 0.3 μm transmitted electromagnetic waves with frequencies of approximately 100 and 285 THz, respectively. These spectral frequencies shifted depending on the adsorption amount of protein. The slope in the linear relationship between the adsorption amount and spectral shift (i.e. sensitivity) of the metal mesh device with a hole diameter of 0.3 μm was seven times as great as that of the device with a hole diameter of 1.7 μm. These results agreed with the theoretical concept of the sensitivity for the metal mesh device sensor being proportional to the square of the transmittance frequency. As biosensors, the structurally refined metal mesh devices amplified the output signals.