Improving SERS substrates with Au/Ag-coated Si nanostructures generated by laser ablation synthesis in PVA

Hammad, Qudama Kh.; Ayyash, Adil N.; Mutlak, Falah A.-H.

doi:10.1007/s12596-022-00971-4

Cited by 14 publications

(2 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ablated nanoparticles or surface structures could later be decorated with chemically synthesized structures [24,37,38] or could be used as reductors of metal salts [22,39]. The produced nanoparticles were applied for rat blood analysis [23], detection of explosives [22,24,40], pyrromethene [41], antibiotics [26], pesticides [24,36,39], and many other molecules [38].…”

Section: Introductionmentioning

confidence: 99%

Magneto-Plasmonic Nanoparticles Generated by Laser Ablation of Layered Fe/Au and Fe/Au/Fe Composite Films for SERS Application

Mikoliunaite,

Stankevičius,

Adomavičiūtė-Grabusovė

et al. 2023

Coatings

View full text Add to dashboard Cite

Magneto-plasmonic nanoparticles were fabricated using a 1064 nm picosecond-pulsed laser for ablation of Fe/Au and Fe/Au/Fe composite thin films in acetone. Nanoparticles were characterized by electron microscopy, ultraviolet-visible (UV-VIS) absorption, and Raman spectroscopy. Hybrid nanoparticles were arranged on an aluminum substrate by a magnetic field for application in surface-enhanced Raman spectroscopy (SERS). Transmission electron microscopy and energy dispersive spectroscopy analysis revealed the spherical core-shell (Au-Fe) structure of nanoparticles. Raman spectroscopy of bare magneto-plasmonic nanoparticles confirmed the presence of magnetite (Fe3O4) without any impurities from maghemite or hematite. In addition, resonantly enhanced carbon-based bands were detected in Raman spectra. Plasmonic properties of hybrid nanoparticles were probed by SERS using the adsorbed biomolecule adenine. Based on analysis of experimental spectra and density functional theory modeling, the difference in SERS spectra of adsorbed adenine on laser-ablated Au and magneto-plasmonic nanoparticles was explained by the binding of adenine to the Fe3O4 structure at hybrid nanoparticles. The hybrid nanoparticles are free from organic stabilizers, and because of the biocompatibility of the magnetic shell and SERS activity of the plasmonic gold core, they can be widely applied in the construction of biosensors and biomedicine applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Magneto-Plasmonic Nanoparticles Generated by Laser Ablation of Layered Fe/Au and Fe/Au/Fe Composite Films for SERS Application

Mikoliunaite,

Stankevičius,

Adomavičiūtė-Grabusovė

et al. 2023

Coatings

View full text Add to dashboard Cite

show abstract

“…PS nanoparticles has attracted more attention as a result of proof of its evident photoluminescence [ 15 , 16 ]. In addition, it has been shown that it could be done to produce layered structures and modify the PS nanoparticle's refractive index [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of different etching times on the structural, morphological, electrical, and antimicrobial properties of mesoporous silicon

Sivaprakash,

Venkatesan,

Muthu

et al. 2023

Heliyon

View full text Add to dashboard Cite

The influence of the physicochemical processes on the electrical response of Al/p-Si structure with etched surface

Badali,

Azizian-Kalandaragh

2024

Appl. Phys. A

View full text Add to dashboard Cite

In this paper, the electrochemical etching process is used for surface modification of the p-Si wafer, named as porous silicon (PS), in the metal–semiconductor (MS) type Schottky diode (SD) with a structure of Al/p-Si. Five regions of PS wafer with different etching rates are selected for comparison of them which are called P2, P3, P4, and P5 (P1 is the reference area without porosity). The morphological, structural, and electrical properties of the PS used in the MS-type SD are investigated using field-emission scanning electron microscope (FE-SEM) images, energy dispersive X-ray (EDX) analysis, and current–voltage (I–V) characteristics, respectively. The FE-SEM images show a meaningful effect on the porosity. The EDX spectrum demonstrates the importance of the chemical effects in addition to the physical changes in the porosity process of the p-Si wafer. The reverse-saturation current (I0), ideality factor (n), barrier height at zero-bias (ΦB0), and series/shunt electrical resistances are also computed and compared. Some of these parameters (n, Rs, BH) are determined using different methods, namely Thermionic emission (TE), Cheung functions, and modified Norde, and they exhibit strong agreement with each other. The energy-dependent profiles of surface states (Nss) are estimated from the I–V data by considering the voltage dependence of ΦB (V) and n(V). All the experimental findings indicate that the etching process of the p-Si wafer significantly influences the electrical performance of the Al/p-Si Schottky diode by increasing the extent of etching.

show abstract

Improving SERS substrates with Au/Ag-coated Si nanostructures generated by laser ablation synthesis in PVA

Cited by 14 publications

References 34 publications

Magneto-Plasmonic Nanoparticles Generated by Laser Ablation of Layered Fe/Au and Fe/Au/Fe Composite Films for SERS Application

Magneto-Plasmonic Nanoparticles Generated by Laser Ablation of Layered Fe/Au and Fe/Au/Fe Composite Films for SERS Application

Effect of different etching times on the structural, morphological, electrical, and antimicrobial properties of mesoporous silicon

The influence of the physicochemical processes on the electrical response of Al/p-Si structure with etched surface

Contact Info

Product

Resources

About