Abstract
Graphene is a promising material for vapor sensor applications because of its potential to be functionalized for specific chemical gases. In this work, we present a graphene gas sensor that uses single-stranded DNA (ssDNA) molecules as its sensing agent. We investigate the characteristics of graphene field effect transistors (FETs) coated with different ssDNAs. The sensitivity and recovery rate for a specific gas are modified according to the differences in the DNA molecules' Guanine (G) and Cytosine (C) content. ssDNA-functionalized devices show a higher recovery rate compared to bare graphene devices. Pattern analysis of a 2-by-2 sensor array composed of graphene devices functionalized with different-sequence ssDNA enables identification of NH3, NO2, CO, SO2 using Principle Component Analysis (PCA).
Original language | English |
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Title of host publication | Proceedings of SPIE - The International Society for Optical Engineering |
Publisher | SPIE |
Volume | 9655 |
ISBN (Print) | 9781628418651 |
DOIs | |
Publication status | Published - 2015 |
Externally published | Yes |
Event | 5th Asia-Pacific Optical Sensors Conference, APOS 2015 - Jeju, Korea, Republic of Duration: 2015 May 20 → 2015 May 22 |
Other
Other | 5th Asia-Pacific Optical Sensors Conference, APOS 2015 |
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Country | Korea, Republic of |
City | Jeju |
Period | 15/5/20 → 15/5/22 |
Keywords
- Graphene
- Principle Component Analysis
- Sensor Array
- Single-Stranded DNA
ASJC Scopus subject areas
- Applied Mathematics
- Computer Science Applications
- Electrical and Electronic Engineering
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics