尸体
石墨烯
纳米棒
材料科学
纳米技术
检出限
等离子体子
纳米结构
生物传感器
光电子学
化学
色谱法
生物化学
酶
腐胺
作者
Kyung Ho Kim,Seongjae Jo,Sung Eun Seo,Jaemin Kim,Dae-Sik Lee,Siyeon Joo,Jiwon Lee,Hyun Seok Song,Hee Gu Lee,Oh Seok Kwon
出处
期刊:ACS Sensors
[American Chemical Society]
日期:2023-05-10
卷期号:8 (6): 2169-2178
被引量:2
标识
DOI:10.1021/acssensors.2c02414
摘要
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.
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