Development of a Colorimetric Probe Based on Gold Nanorods for Visual Detection of Spermidine
Paper ID : 1199-ICNS
afsaneh orouji *1, Forough Ghasemi2, Mohammad Reza Hormozi Nezhad3
1Chemistry Department, Sharif University of Technology, Tehran, Iran
2Department of Nanotechnology, Agricultural Biotechnology Research Institute of Iran (ABRII), Agricultural Research, Education, and Extension Organization (AREEO), Karaj, 3135933151, Iran
3Department of Chemistry, Sharif University of Technology, Tehran 11155-9516, Iran‎
Colorimetric detection of biogenic amines (e.g., spermidine), well-known indicators of food spoilage, plays an important role in monitoring food safety. Thus, it is important to develop simple, portable and highly sensitive amine sensors for food safety. However, common colorimetric sensors for biogenic amines suffer from low color resolution or complicated design and intricate output for the end-users. Herein, we explored a simple and effective strategy for visual monitoring of spermidine with multiple color change based on hydrolysis-induced silver metallization reaction to tune the localized surface plasmon resonance (LSPR) adsorption of gold nanorods (AuNRs). The color change and blue shift of longitudinal LSPR peak of AuNRs were closely related to the concentration of spermidine. This strategy showed several advantages. First, this sensor provided sensitive, and high resolution colorimetric method for the end-users due to the distinctive multiple color readout. Second, this sensor was simple to fabricate by only using Au NRs as the signal transducer. Third, the detection of biogenic amines was nondestructive, no pretreatment was needed., this sensor was cost-effective and robust and user-friendly platform for in situ evaluating the freshness of foodstuffs.
“Colorimetric sensor”, “Gold nanorods”, “Spermidine”
Status : Abstract Accepted (Poster Presentation)