Highly active surface-enhanced Raman scattering (SERS) substrates based on gold nanoparticles infiltrated into SiO2 inverse opals

Ankudze, Bright; Philip, Anish; Pakkanen, Tuula T.; Matikainen, Antti; Vahimaa, Pasi

doi:10.1016/j.apsusc.2016.06.063

Cited by 25 publications

(22 citation statements)

References 29 publications

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“…In Fig. 4, the vibrational bands at 1078 cm -1 and 1581 cm -1 are assigned to the C-S and C-C stretching of 4-ATP, respectively, while the band at 1179 cm -1 is assigned to the C-H bending of 4-ATP [12,44]. These a 1 -type vibrational modes, which are enhanced through the electromagnetic mechanism, are characteristic of 4-ATP [44].…”

Section: Au-hal Nanotube Sers Substratesmentioning

confidence: 96%

“…While small nanoparticles with large number of active sites are essential for catalysis, bigger nanoparticles with rough edges are more useful in surface-enhanced Raman scattering (SERS) applications [7][8][9][10][11]. Enhancement of Raman signals by gold nanoparticle substrates and the ability of AuNPs to form hot spots are presently an active field of research [12][13][14]. The SERS method has the advantage to increase the intensity of weak Raman signals by a factor of 10 5 -10 14 , that enables detection of analytes in trace amounts and even a single molecule detection [15].…”

Section: Introductionmentioning

confidence: 99%

“…The Raman signal enhancement of an analyte molecule adsorbed on a nanostructured substrate surface is possible via two different mechanisms, electromagnetic and chemical mechanisms [12,15,16]. According to the electromagnetic mechanism, the signal enhancement occurs via interaction of the excited localized surface plasmon resonance of a metallic nanoparticle with an analyte molecule close to the nanoparticle surface [15,16].…”

Section: Introductionmentioning

confidence: 99%

“…Both chemical and physical methods have been adopted for the fabrication of SERS substrates [6,12,13,[25][26][27]. There are several types of materials available to support metallic nanoparticles in the SERS substrates such as glass plates, nanofibers, photonic crystals and halloysite nanotubes.…”

Section: Introductionmentioning

confidence: 99%

“…Substrates based on photonic crystals (inverse opal films) are of interest as coupling of photonic band gap properties with a localized surface plasmon resonance (SPR) of metallic nanoparticles can provide highly sensitive SERS substrates [12,[28][29][30]. The extra benefit of using photonic crystals with metallic nanoparticles is, that cavities of the inverse opal structure can assist formation of metal nanoparticle clusters and thereby creation of more hot spots [30].…”

Section: Introductionmentioning

confidence: 99%

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Polyethylenimine-assisted seed-mediated synthesis of gold nanoparticles for surface-enhanced Raman scattering studies

Philip

Ankudze

Pakkanen

2018

Applied Surface Science

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Large-sized gold nanoparticles (AuNPs) were synthesized with a new polyethylenimineassisted seedmediated method for surface-enhanced Raman scattering (SERS) studies. The size and polydispersity of gold nanoparticles are controlled in the growth step with the amounts of polyethylenimine (PEI) and seeds. Influence of three silicon oxide supports having different surface morphologies, namely halloysite (Hal) nanotubes, glass plates and inverse opal films of SiO 2 , on the performance of gold nanoparticles in Raman scattering of a 4-aminothiophenol (4-ATP) analyte was investigated. Electrostatic interaction between positively charged polyethylenimine-capped AuNPs and negatively charged surfaces of silicon oxide supports was utilized in fabrication of the SERS substrates using deposition and infiltration methods. The Au-photonic crystal of the three SERS substrate groups is the most active one as it showed the highest analytical enhancement factor (AEF) and the lowest detection limit of 1x10-8 M for 4-ATP. Coupling of the optical properties of photonic crystals with the plasmonic properties of AuNPs provided Au-photonic crystals with the high SERS activity. The AuNPs clusters formed both in the photonic crystal and on the glass plate are capable of forming more hot spots as compared to sparsely distributed AuNPs on Hal nanotubes and thereby increasing the SERS enhancement.

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Section: Au-hal Nanotube Sers Substratesmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Polyethylenimine-assisted seed-mediated synthesis of gold nanoparticles for surface-enhanced Raman scattering studies

Philip

Ankudze

Pakkanen

2018

Applied Surface Science

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Structural aspects, reactivity analysis, wavefunction based properties, cluster formation with helicene and subsequent detection from surface enhancement in Raman spectra of triclabendazole studies using first principle simulations

Pooventhiran,

Thomas,

Bhattacharyya

et al. 2021

Vietnam Journal of Chemistry

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This manuscript aims to study the structure and the other physical and chemical properties of triclabendazole, which is used to treat liver flukes, with the help of electronic structure methods. With the help of density functional theory, the ground state geometry of the triclabendazole molecule was optimized using B3LYP functional along with aug‐cc‐pVDZ basis set. The reactivity descriptors were discussed in detail to evaluate the biological potential of the compound. The molecule was found to show excellent nonlinear optical properties when compared to standard molecules like urea and p‐nitroacetanilide. Wavefunction dependent properties like ALIE, LOL, LIE etc. studies provided a lot of information regarding the electronic properties that are ample for predicting the bioactivity of the same molecule. The molecule gets adsorbed over the surface of the helicene nanocluster with slightly negative adsorption energy and shows an effective SERS mechanism.

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Silver Nanocube- and Nanowire-Based SERS Substrates for Ultra-low Detection of PATP and Thiram Molecules

Kumar

Soni

2020

Plasmonics

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Highly active surface-enhanced Raman scattering (SERS) substrates based on gold nanoparticles infiltrated into SiO2 inverse opals

Cited by 25 publications

References 29 publications

Polyethylenimine-assisted seed-mediated synthesis of gold nanoparticles for surface-enhanced Raman scattering studies

Polyethylenimine-assisted seed-mediated synthesis of gold nanoparticles for surface-enhanced Raman scattering studies

Structural aspects, reactivity analysis, wavefunction based properties, cluster formation with helicene and subsequent detection from surface enhancement in Raman spectra of triclabendazole studies using first principle simulations

Silver Nanocube- and Nanowire-Based SERS Substrates for Ultra-low Detection of PATP and Thiram Molecules

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