Fabrication of nanocages on nickel using femtosecond laser ablation and trace level detection of malachite green and Nile blue dyes using surface enhanced Raman spectroscopic technique

Byram, Chandu; Moram, Sree Satya Bharati; Albrycht, Paweł; Soma, Venugopal Rao

doi:10.1016/j.optlastec.2020.106454

Cited by 24 publications

(15 citation statements)

References 45 publications

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“…To get a better understanding on the effect of surface roughness/nanostar density, more detailed investigations are needed and will be considered in future. In addition, the concentration-dependent SERS spectra and linear plot are presented in the Supporting Information (Figure S3a 43 The NB major peak intensities were significantly enhanced while increasing the concentration, and the detected lower concentration was ∼5 × 10 −11 M. Even at the 50 pM concentration, major Raman modes of NB were clearly distinguishable, revealing the higher sensitivity of the Au nanostar-loaded laser-processed Ag substrate. A logarithmic plot between the SERS signal intensity for the prominent mode of NB located at 590 cm −1 with varying concentration is shown in Figure 11b.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The SERS spectra of NB at different concentrations ranging from 5 μM to 50 pM recorded from the Au nanostar-decorated laser-processed Ag substrate are illustrated in Figure a. The NB Raman bands were located at 590 and 661 cm –1 and are associated with the C–C–C and C–N–C deformations and in-plane C–C–C deformation . The NB major peak intensities were significantly enhanced while increasing the concentration, and the detected lower concentration was ∼5 × 10 –11 M. Even at the 50 pM concentration, major Raman modes of NB were clearly distinguishable, revealing the higher sensitivity of the Au nanostar-loaded laser-processed Ag substrate.…”

Section: Resultsmentioning

confidence: 99%

“…27,41 Moram et al have detected several explosive molecules using silicon (Si) microsquared arrays embedded with Ag/Au NP SERS substrates achieved using femtosecond (fs) laser ablation. 37 In a few of our earlier reports, 42,43 we have reported the utility of Au film-coated Fe/ Ni NSs achieved by fs laser irradiation in different liquids for the detection of explosives and pesticides. In another study, we also demonstrated the fabrication of Au NP and nanostars using laser ablation and wet chemical approaches and further examined the SERS performance by integrating them with bare Si/filter paper.…”

Section: ■ Introductionmentioning

confidence: 97%

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Hybrid Surface-Enhanced Raman Scattering Substrates for the Trace Detection of Ammonium Nitrate, Thiram, and Nile Blue

et al. 2022

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We report the fabrication and performance evaluation of hybrid surface-enhanced Raman scattering (SERS) substrates involving laser ablation and chemical routes for the trace-level detection of various analyte molecules. Initially, picosecond laser ablation experiments under ambient conditions were performed on pure silver (Ag) and gold (Au) substrates to achieve distinct nanosized features on the surface. The properties of the generated surface features on laser-processed portions of Ag/Au targets were systematically analyzed using UV–visible reflection and field emission scanning electron microscopy studies. Later, hybrid-SERS substrates were achieved by grafting the chemically synthesized Au nanostars on the plain and laser-processed plasmonic targets. Subsequently, we employed these as SERS platforms for the detection of a pesticide (thiram), a molecule used in explosive compositions [ammonium nitrate (AN)], and a dye molecule [Nile blue (NB)]. A comparative SERS study between the Au nanostar-decorated bare glass, silicon, Ag, Au, and laser-processed Ag and Au targets has been established. Our studies and the obtained data have unambiguously determined that laser-processed Ag structures have demonstrated reasonably good enhancements in the Raman signal intensities for distinct analytes among other substrates. Importantly, the fabricated hybrid SERS substrate of “Au nanostar-decorated laser-processed Ag” exhibited up to eight times enhancement in the SERS intensity compared to laser-processed Ag (without nanostars), as well as up to three times enhancement than the Au nanostar-loaded plain Ag substrates. Additionally, the achieved detection limits from the Au nanostar-decorated laser-processed Ag SERS substrate were ∼50 pM, ∼5 nM, and ∼5 μM for NB, thiram, and AN, respectively. The estimated enhancement factors accomplished from the Au nanostar-decorated laser-processed Ag substrate were ∼10 6 , ∼10 6 , and ∼10 4 for NB, thiram, and AN, respectively.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 97%

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Hybrid Surface-Enhanced Raman Scattering Substrates for the Trace Detection of Ammonium Nitrate, Thiram, and Nile Blue

et al. 2022

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“…Ripple nanostructures have significant applications in many fields, such as surface-enhanced Raman scattering, 1,2 special-purpose optical elements, 3,4 and solar-cell design. 5,6 At present, methods for machining ripple nanostructures mainly include electron-beam lithography, 7 focused ion beam milling, 8 periodic pulse anodizing, 9 and self-assembly.…”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Simulations of Ripple Nanostructure Formation During Nanomachining via Atomic Force Microscopy

Geng

Jia

Yan

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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Molecular dynamics (MD) constant force simulation mode is first used to study the formation of the ripple nanostructures on the single-crystal copper surface by combining the topography generated by machined grooves with the accumulated pile-up material on the side of these grooves via a triangular pyramid atomic force microscopy (AFM) tip. Groove morphologies, lateral forces, the evolution of subsurface defects, and atomic flow laws generated by different machining parameters are discussed. Specifically, the normal load, the feed value between grooves, and the scratching direction significantly affect groove formation. The simulated morphologies of the ripple nanostructures indicate that groove consistency and symmetry increase with increasing feed, and an optimized feed for various normal loads can be determined. The interaction between adjacent grooves produces a variation in the lateral forces with the groove number and feed. This is mainly related to the evolution of subsurface defects, the atomic flow law, and the volume of material pile-ups. The distributions of subsurface defects affect the atomic flow directions, and the atomic flow laws determine groove formation. The simulations provide important guidance for ripple nanostructure fabrication on single-crystal copper surface via AFM tips.

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“…For example, femtosecond lasers are used for producing high-quality and high-aspect-ratio micro-holes in metallic materials, especially those used in aircraft engines [ 10 ] and inertial-confinement nuclear fusion devices [ 11 , 12 ]. Nickel is a highly versatile metal, and femtosecond lasers have been used in the fabrication of various nickel structures [ 13 , 14 , 15 ]. In recent years, nickel has been widely used for fabricating the film-cooling holes of aerospace engine turbine blades.…”

Section: Introductionmentioning

confidence: 99%

Throughput Improvement in Femtosecond Laser Ablation of Nickel by Double Pulses

et al. 2021

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In this study, femtosecond laser double pulses were tested to improve their nickel ablation efficiency. The experimental results indicated that compared with single pulses, double pulses with different delay times generated craters with larger diameters and depths. The results obtained for three sets of double pulses with different energy ratios indicated that double pulses with an energy ratio of 1:9 had the highest ablation efficiency, followed by those with energy ratios of 2:8 and 5:5. The double pulses with the aforementioned three energy ratios achieved the maximum ablation efficiency when the delay time was 3–4 ps. Compared with single pulses, double pulses with an energy ratio of 1:9 generated craters with an up to 34% greater depth and up to 14% larger diameter. In addition, an interference effect was observed with a double pulse delay time of 0 ps, which has seldom been reported in the literature. The double pulses were simulated using the two-temperature model. The simulation results indicated that double pulses with an energy ratio of 1:9 with a delay time of 4 ps can perform the strongest ablation. These simulation results are in line with the experimental results.

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Fabrication of nanocages on nickel using femtosecond laser ablation and trace level detection of malachite green and Nile blue dyes using surface enhanced Raman spectroscopic technique

Cited by 24 publications

References 45 publications

Hybrid Surface-Enhanced Raman Scattering Substrates for the Trace Detection of Ammonium Nitrate, Thiram, and Nile Blue

Hybrid Surface-Enhanced Raman Scattering Substrates for the Trace Detection of Ammonium Nitrate, Thiram, and Nile Blue

Molecular Dynamics Simulations of Ripple Nanostructure Formation During Nanomachining via Atomic Force Microscopy

Throughput Improvement in Femtosecond Laser Ablation of Nickel by Double Pulses

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