SERS Studies Of Explosive Molecules With Diverse Copper Nanostructures Fabricated Using Ultrafast Laser Ablation

Hamad, Syed; Podagatlapalli, G. Krishna; Mohiddon, Md. Ahamad; Soma, Venugopal Rao

doi:10.5185/amlett.2015.6007

Cited by 13 publications

(8 citation statements)

References 43 publications

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“…56 Podagatlapalli et al achieved detection of 5 Â 10 À6 M (ANTA), 57 10 À6 M (FOX-7) 58 by Ag laser ablation nanocavities. Hamad et al 59 detected 10 À6 M (CL-20) by using laser ablated Cu NS. Zhang et al detected 10 À6 M of TNT by using Au NPs.…”

Section: Sers Activity Of Ag Cu and Ag-cu Npsmentioning

confidence: 99%

“…The plotted 3D SERS spectra by considering the Raman signals at 10 different sites on Ag-Cu alloy NPs substrate provided in the S4-S6 (MB-S4; PA-S5; AN-S6 †). By comparing the performance of various alloy NPs from recently reported reports [57][58][59][60][61][62][63] Ag-Cu NPs as SERS substrates have undoubtedly demonstrated comparable/superior SERS performance. Further improvements are possible in the enhancement factors by combining the NPs and the NSs together (as we have demonstrated it recently).…”

Section: Sers Activity Of Ag Cu and Ag-cu Npsmentioning

confidence: 99%

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Explosives sensing using Ag–Cu alloy nanoparticles synthesized by femtosecond laser ablation and irradiation

2019

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Section: Sers Activity Of Ag Cu and Ag-cu Npsmentioning

confidence: 99%

Section: Sers Activity Of Ag Cu and Ag-cu Npsmentioning

confidence: 99%

Explosives sensing using Ag–Cu alloy nanoparticles synthesized by femtosecond laser ablation and irradiation

2019

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“…The observed enhancement factors for R6G are considerably higher than the reported values in the recent literature. 31,[51][52][53] The observed effective Raman enhancement factors can be attributed to the high density and uniform distribution of the Ag NPs on Si NWs. Hence, this technique can be used to push the detection limits of SERS to further lower concentrations.…”

Section: Resultsmentioning

confidence: 96%

Three-dimensional hybrid silicon nanostructures for surface enhanced Raman spectroscopy based molecular detection

Vendamani

Rao

Kanjilal

et al. 2018

Journal of Applied Physics

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Three-dimensional silver nanoparticles decorated vertically aligned Si nanowires (Si NWs) are effective surface-enhanced Raman spectroscopy (SERS) substrates for molecular detection at low concentration levels. The length of Si NWs prepared by silver assisted electroless etching is increased with an increase in etching time, which resulted in the reduced optical reflection in the visible region. These substrates were tested and optimized by measuring the Raman spectrum of standard dye Rhodamine 6G (R6G) of 10 nM concentration. Further, effective SERS enhancements of $10 5 and $10 4 were observed for the cytosine protein (concentration of 50 lM) and ammonium perchlorate (oxidizer used in explosives composition with a concentration of 10 lM), respectively. It is established that these three-dimensional SERS substrates yielded considerably higher enhancement factors for the detection of R6G when compared to previous reports. The sensitivity can further be increased and optimized since the Raman enhancement was found to increase with an increase in the density of silver nanoparticles decorated on the walls of Si NWs.

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“…Highly ordered metallic nanostructure arrays for SERS can be fabricated using nanolithography and related nanoimprint lithographic techniques. SERS substrates have been prepared using picosecond (ps) and femtosecond (fs) laser pulses to ablate solid surfaces [ 84 , 85 , 86 , 87 , 88 ]. This approach is a rapid means of fabricating a large-area SERS substrate.…”

Section: Resultsmentioning

confidence: 99%

“…This approach is a rapid means of fabricating a large-area SERS substrate. Stable nanostructures in Cu targets were fabricated with varying pulse energies and pulse numbers using ps and fs pulse ablation of Cu in liquid media [ 84 ]. Using these substrates, FOX-7 (or 1,1-diamino-2,2-dinitroethene), an insensitive high explosive compound with a poor Raman scattering cross-section, was detected at concentrations of 25 μM.…”

Section: Resultsmentioning

confidence: 99%

Review of SERS Substrates for Chemical Sensing

2017

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The SERS effect was initially discovered in the 1970s. Early research focused on understanding the phenomenon and increasing enhancement to achieve single molecule detection. From the mid-1980s to early 1990s, research started to move away from obtaining a fundamental understanding of the phenomenon to the exploration of analytical applications. At the same time, significant developments occurred in the field of photonics that led to the advent of inexpensive, robust, compact, field-deployable Raman systems. The 1990s also saw rapid development in nanoscience. This convergence of technologies (photonics and nanoscience) has led to accelerated development of SERS substrates to detect a wide range of chemical and biological analytes. It would be a monumental task to discuss all the different kinds of SERS substrates that have been explored. Likewise, it would be impossible to discuss the use of SERS for both chemical and biological detection. Instead, a review of the most common metallic (Ag, Cu, and Au) SERS substrates for chemical detection only is discussed, as well as SERS substrates that are commercially available. Other issues with SERS for chemical detection have been selectivity, reversibility, and reusability of the substrates. How these issues have been addressed is also discussed in this review.

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SERS Studies Of Explosive Molecules With Diverse Copper Nanostructures Fabricated Using Ultrafast Laser Ablation

Cited by 13 publications

References 43 publications

Explosives sensing using Ag–Cu alloy nanoparticles synthesized by femtosecond laser ablation and irradiation

Explosives sensing using Ag–Cu alloy nanoparticles synthesized by femtosecond laser ablation and irradiation

Three-dimensional hybrid silicon nanostructures for surface enhanced Raman spectroscopy based molecular detection

Review of SERS Substrates for Chemical Sensing

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