Kim, Kyung Ho Jo, Seongjae Seo, Sung Eun Kim, Jaemin Lee, Dae-Sik Joo, Siyeon Lee, Jiwon Song, Hyun Seok Lee, Hee Gu Kwon, Oh Seok 2024-01-19T09:31:29Z 2024-01-19T09:31:29Z 2023-06-15 2023-06 2379-3694 https://pubs.kist.re.kr/handle/201004/113682 Nanoplasmonic sensors are a widely known concept and have been studied with various applications. Among them, gas detection is engaging attention in many fields. However, the analysis performance of nanoplasmonic sensors based on refractive index confined to the metal nanostructure characteristics causes challenges in gas detection. In this study, we develop a graphene-encased gold nanorod (AuNR)-based nanoplasmonic sensor to detect cadaverine gas. The graphene-encased AuNR (Gr@AuNR) presents an ultrasensitive peak wavelength shift even with tiny molecules. In addition, the external potential transmitted through graphene induces an additional shift. A chemical receptor is immobilized on Gr@ AuNR (CR@Gr@AuNR) for selectively capturing cadaverine. The CR@Gr@AuNR achieves ultrasensitive detection of cadaverine gas, and the detection limit is increased to 15.99 ppb by applying a voltage to graphene. Furthermore, the experimental results of measuring cadaverine generated from spoiled pork show the practicality of CR@Gr@AuNR. The strategy of external-boosted nanoplasmonics provides new insight into plasmonic sensing and applications. English AMER CHEMICAL SOC Ultrasensitive Gas Detection Based on Electrically Enhanced Nanoplasmonic Sensor with Graphene-Encased Gold Nanorod Article 10.1021/acssensors.2c02414 1 ACS Sensors, v.8, no.6, pp.2169 - 2178 ACS Sensors 8 6 2169 2178 N scie scopus 000988782700001 2-s2.0-85160839789 Chemistry, Multidisciplinary Chemistry, Analytical Nanoscience & Nanotechnology Chemistry Science & Technology - Other Topics Article SURFACE-PLASMON RESONANCE ENERGY-TRANSFER LAYER GRAPHENE METAL NANOCOMPOSITES SPECTROSCOPY CATALYST SPECTRA SUPPORT DEVICE plasmon cadaverine gas sensor gold nanorods graphene