P2.3.11 A Novel Fully Gravure Printed Flexible Surface Enhanced Raman Spectroscopy (SERS) Substrate for the Detection of Toxic Heavy Metals
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
- P2.3 Sensors Based on Optical Techniques
- A. Eshkeiti, B. Narakathu, A. Reddy - Department of Electrical and Computer Engineering, Western Michigan University (USA), E. Rebrosova, M. Rebros, M. Joyce, M. Atashbar - Center for Advancement of Printed Electronics, Western Michigan University (USA)
- 1479 - 1482
A novel flexible surface enhanced Raman spectroscopy (SERS) substrate was successfully fabricated by gravure printing a thin film of silver (Ag) nanoparticle ink with 20~50 nm particle size on polyethylene terephthalate (PET). The feasibility of the fabricated SERS substrate for detecting toxic heavy metals such as mercury sulfide (HgS) and cadmium sulfide (CdS) was demonstrated. The SERS based response of the printed substrate produced an enhanced Raman signal when compared to target molecules adsorbed on bare PET. An enhancement factor of 5 orders of magnitude due to existence of hot spots between nanoparticles was obtained. This response demonstrated the feasibility of the novel SERS substrate to be used in applications for detection of toxic heavy metals.