Related Experiment Video
Updated: Jan 22, 2026

Development and Functionalization of Electrolyte-Gated Graphene Field-Effect Transistor for Biomarker Detection
Published on: February 1, 2022
Graphene-assisted biosensing based on terahertz nanoslot antennas
Geunchang Choi1, Sung Ju Hong2, Young-Mi Bahk3
1Department of Energy Science, Sungkyunkwan University, Suwon, 16419, Republic of Korea. gchoi@skku.edu.
Abstract:
We report on improvement of sensitivity for molecular detection utilizing terahertz time domain spectroscopy. Based on confining and enhancing electromagnetic field with metallic nanoslot antennas, we additionally employ monolayer graphene sheet whose edge and hydrophobic surface nature lead to increase detecting performance. Terahertz transmittance in monolayer graphene/metallic nanoslot structure exhibits more unambiguous change after lactose molecules are attached, compared to that in metallic nanoslot structure without monolayer graphene. We attribute the prominent change to that more lactose molecules are guided inside/near the metal gap region due to edge and hydrophobic surface nature of monolayer graphene. This monolayer graphene/metallic nanoslot structure can be expanded in other organic or bio-molecular detection.
Related Concept Videos
The Antenna Complex
Matrix-Assisted Laser Desorption Ionization (MALDI)
Base Excision Repair
The first step of...
Lewis Acids and Bases
A coordinate covalent bond (or dative bond) occurs when one of the atoms in the bond provides both bonding electrons. For example, a coordinate covalent bond occurs when a water molecule combines with a hydrogen ion to form a hydronium ion. A coordinate covalent bond also results when...
Weak Base Solutions
DNA Base Pairing

