Detection of heavy metal compounds using a novel inkjet printed surface enhanced Raman spectroscopy (SERS) substrate

Sensors and Actuators B: Chemical

et al. 2015

Please cite this article in press as: S. Emamian, et al., Gravure printed flexible surface enhanced Raman spectroscopy (SERS) substrate for detection of 2,4-dinitrotoluene (DNT) vapor, Sens. Actuators B: Chem. (2014), http://dx. a b s t r a c tAn efficient surface enhanced Raman spectroscopy (SERS) substrate was successfully fabricated by gravure printing a thin film of silver nanoparticle (Ag NP) ink, with average particle size of 150 nm, on flexible polyethylene terephthalate (PET) sheet. The feasibility of the printed SERS substrate for detecting explosive organic compounds such as 2,4-dinitrotoluene (DNT), in vapor phase, was investigated. The SERS based response of the printed substrate demonstrated an enhancement factor of four in the intensity of the Raman signal of DNT vapor when compared to target molecules adsorbed on bare PET. An 85% decrease in the intensity of the Raman spectrum was also observed as the temperature increased from 25 • C to 65 • C. The results obtained show the efficiency of the gravure printed SERS substrate to be used in applications for the detection of explosive organic compounds.

Section: Introductionmentioning

confidence: 99%

Gravure printed flexible surface enhanced Raman spectroscopy (SERS) substrate for detection of 2,4-dinitrotoluene (DNT) vapor

Sepehr

Eshkeiti

Sensors and Actuators B: Chemical

et al. 2015

“…Heavy metal detection has been receiving an increasing concern due to its adverse effects in aquatic and atmospheric ecosystems, even at the micro-or nano-molar concentration levels [1,2]. In case of aquatic systems, this eco-and phytotoxicity on vital microorganisms is influenced by environmental factors [3].…”

Section: Introductionmentioning

confidence: 99%

SH-SAW-based sensor for heavy metal ion detection

Ramshani

2015 Joint Conference of the IEEE International Frequency Control Symposium &Amp; The European Frequency and Time Forum

Reddy

et al. 2015

In this study, a shear horizontal mode surface acoustic wave (SH-SAW) sensor, was designed and fabricated for the detection of heavy metals. The SH-SAW sensor was photolithographically fabricated by patterning gold (Au) interdigitated electrodes (IDE) and reflectors on the surface of a 64° YX-LiNbO 3 based piezoelectric substrate. A flow cell, with a reservoir volume of 3 µl, which employs inlet and outlet ports for the microfluidic chamber and polydimethylsiloxane (PDMS) based microfluidic channels, was also designed and fabricated using acrylic material. Phenol and naphtho[2,3-a]dipyrido[3,2-h:2'3'-f] phenazine-5,18-dione (QDPPZ) were employed as the sensing layers for mercury and nickel ions, respectively. The frequency based response of the SH-SAW sensor demonstrated picomolar level detection for mercury nitrate (Hg(NO 3 ) 2 ) and nickel nitrate (Ni(NO 3 ) 2 ).

“…However, these methods are often expensive, time consuming, complex and require cleanroom facilities. Traditional printing techniques such as gravure [25] and inkjet [26] have been used, as a cost effective and low temperature fabrication process, for the deposition of NPs. However, there have been no reports on the use of gravure printing of flexible SERS substrates for the detection of explosive organic compounds such as DNT in vapor phase.…”

Section: Introductionmentioning

confidence: 99%

Detection of 2,4-dinitrotoluene (DNT) using gravure printed surface enhancement Raman spectroscopy (SERS) flexible substrate

Sepehr

Eshkeiti

IEEE SENSORS 2014 Proceedings

et al. 2014

In this work, gravure printing was used to fabricate a thin film of silver (Ag) nanoparticle ink on flexible polyethylene terephthalate (PET) sheet as an efficient surface enhanced Raman spectroscopy (SERS) substrate. The printed SERS substrate was used for the detection of an explosive organic compound: 2,4-dinitrotoluene (DNT), in vapor phase. An enhancement factor of four, in the intensity of the Raman spectrum of DNT vapor, was observed when compared to target molecules absorbed on bare PET. An increase in temperature, from 25 • C to 65 • C, demonstrated an 85 % decrease in the intensity of the Raman signal. The results obtained show the capability of the printed SERS substrate to be used in applications for the detection of explosive organic compounds.