Studying Silver Nanoparticles Deposited on Surfaces of Porous Silicon and a Single Crystal by Chemical Means

Melnik, N. N.; Sherstnev, I. A.; Tregulov, V. V.

doi:10.3103/s1062873821090227

Cited by 3 publications

(1 citation statement)

References 5 publications

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“…TERS enables even the imaging of vibrations inside a certain molecule [11] or a quantum dot [12,13], whereas SERS can form the basis of the easy-to-use portable platform for extremely sensitive spectrochemical analysis [14,15]. It can be realized by preparing either active colloid nanoparticle solutions [16], or plasmonic substrates (with regular [17] or random [18][19][20][21] metal nanostructure arrays) [22].…”

Section: Introductionmentioning

confidence: 99%

Ultrasensitive Optical Fingerprinting of Biorelevant Molecules by Means of SERS-Mapping on Nanostructured Metasurfaces

et al. 2022

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The most relevant technique for portable (on-chip) sensors is Surface Enhanced Raman Scattering (SERS). This strategy crashes in the case of large (biorelevant) molecules and nano-objects, whose SERS spectra are irreproducible for “homeopathic” concentrations. We suggested solving this problem by SERS-mapping. We analyzed the distributions of SERS parameters for relatively “small” (malachite green (MG)) and “large” (phthalocyanine, H2Pc*) molecules. While fluctuations of spectra for “small” MG were negligible, noticeable distribution of spectra was observed for “large” H2Pc*. We show that the latter is due to a random arrangement of molecules with respect to “hot spot” areas, which have limited sizes, thus amplifying the lines corresponding to vibrations of different molecule parts. We have developed a method for engineering low-cost SERS substrates optimized for the best enhancement efficiency and a measurement protocol to obtain a reliable Raman spectrum, even for a countable number of large molecules randomly distributed over the substrate.

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Section: Introductionmentioning

confidence: 99%

Ultrasensitive Optical Fingerprinting of Biorelevant Molecules by Means of SERS-Mapping on Nanostructured Metasurfaces

et al. 2022

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3D SERS substrate using silver nanoparticles decorated ZnO nanorods on silicon micropyramids hybrid heterostructure

Kumar Vemuri,

Mukhopadhyay,

Ray

et al. 2024

Applied Surface Science

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Toward single-molecule surface-enhanced Raman scattering with novel type of metasurfaces synthesized by crack-stretching of metallized track-etched membranes

Kovalets

Kozhina

Razumovskaya

et al. 2022

The Journal of Chemical Physics

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The effect of hyperenhancement of Raman scattering (RS) appearing on microcracks of the metal deposition (silver and gold) of uniaxially stretched polymer track-etched membranes is investigated. Deformation of membranes with a combination of high surface density and small diameter of their pores leads to the development of many microcracks in the metal coating. The efficiency of the surface enhancement RS (SERS) of the synthesized metasurfaces has been investigated on the example of organic compound malachite green, and the possibility to recognize extremely low fractions of the substance was demonstrated. An increase in the SERS signal with an increase in the deformation of the samples and even greater enhancement after their unloading and relaxation were found. The experiment on tensile strain and relaxation of the deformation of the samples and the consequent change in their electrical conductivity confirm the assumption that SERS appears on microcracks edges with a rather small distance between their boundaries. The SERS technique is proposed to analyze the formation of micro- and nanocracks on metal coatings.

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Studying Silver Nanoparticles Deposited on Surfaces of Porous Silicon and a Single Crystal by Chemical Means

Cited by 3 publications

References 5 publications

Ultrasensitive Optical Fingerprinting of Biorelevant Molecules by Means of SERS-Mapping on Nanostructured Metasurfaces

Ultrasensitive Optical Fingerprinting of Biorelevant Molecules by Means of SERS-Mapping on Nanostructured Metasurfaces

3D SERS substrate using silver nanoparticles decorated ZnO nanorods on silicon micropyramids hybrid heterostructure

Toward single-molecule surface-enhanced Raman scattering with novel type of metasurfaces synthesized by crack-stretching of metallized track-etched membranes

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