Home
Resources
Publications
Fabrication of Bimetallic Microfluidic Surface-Enhanced Raman Scattering Sensors on Paper by Screen Printing

Fabrication of Bimetallic Microfluidic Surface-Enhanced Raman Scattering Sensors on Paper by Screen Printing

Lu-Lu Qu, Qi-Xia Song, Yuan-Ting Li, Mao-Pan Peng, Da-Wei Li, Li-Xia Chen, John S Fossey, Yi-Tao Long

Anal Chim Acta. 2013 Aug 20;792:86-92.

PMID: 23910972

Abstract:

Au-Ag bimetallic microfluidic, dumbbell-shaped, surface enhanced Raman scattering (SERS) sensors were fabricated on cellulose paper by screen printing. These printed sensors rely on a sample droplet injection zone, and a SERS detection zone at either end of the dumbbell motif, fabricated by printing silver nanoparticles (Ag NPs) and gold nanoparticles (Au NPs) successively with microscale precision. The microfluidic channel was patterned using an insulating ink to connect these two zones and form a hydrophobic circuit. Owing to capillary action of paper in the millimeter-sized channels, the sensor could enable self-filtering of fluids to remove suspended particles within wastewater without pumping. This sensor also allows sensitive SERS detection, due to advantageous combination of the strong surface enhancement of Ag NPs and excellent chemical stability of Au NPs. The SERS performance of the sensors was investigated by employing the probe rhodamine 6G, a limit of detection (LOD) of 1.1×10(-13)M and an enhancement factor of 8.6×10(6) could be achieved. Moreover, the dumbbell-shaped bimetallic sensors exhibited good stability with SERS performance being maintained over 14 weeks in air, and high reproducibility with less than 15% variation in spot-to-spot SERS intensity. Using these dumbbell-shaped bimetallic sensors, substituted aromatic pollutants in wastewater samples could be quantitatively analyzed, which demonstrated their excellent capability for rapid trace pollutant detection in wastewater samples in the field without pre-separation.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS77605	Silver nanoparticles ink for screen printing			Price

As a specialist in analytical chemical Products, Alfa Chemistry offers consumers a wealth of raw materials and a full range of technologies and services.

QUICK LINKS

HEADQUARTERS

Tel:

Fax:

Email: