Related Experiment Video
Updated: Mar 11, 2026
Optical Detection of E. coli Bacteria by Mesoporous Silicon Biosensors
Published on: November 20, 2013
Mesoporous Silicon with Modified Surface for Plant Viruses and Their Protein Particle Sensing
Yuriy Vashpanov1, Jung Young Son2, Kae Dal Kwack1
1Research Institute of Electrical and Computer Engineering, HIT Hanyang University, 17 Haengdang-dong, Seongdong-ku, 133-791, Seoul, Korea.
Abstract:
Changes in electric parameters of a mesoporous silicon treated by a plasma chemical etching with fluorine and hydrogen ions, under the adsorption of NEPO (Nematodetransmitted Polyhedral) plant viruses such as TORSV (Tomato Ringspot Virus), GFLV (Grapevine Fan Leaf Virus) and protein macromolecule from TORSV particles are described. The current response to the applied voltage is measured for each virus particle to investigate the material parameters which are sensitive to the adsorbed particles. The peculiar behaviors of the response are modeled by the current-voltage relationship in a MOSFET. This model explains the behavior well and the double gate model of the MOSFET informs that the mesoporous silicon is a highly sensitive means of detecting the viruses in the size range less than 50 nm.
