Detailed Investigation of Factors Affecting the Synthesis of SiO2@Au for the Enhancement of Raman Spectroscopy

Thảo, Nguyễn Thị Phương; Ton-That, Loc; Dang, Cong-Thuan; Nedoma, Jan

doi:10.3390/nano12173080

Cited by 3 publications

(3 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The peaks at 1376 cm −1 (D) and 1556 cm −1 (G) show that silicon oxide nanoparticles are not reduced. The weak band at 1090 cm −1 is also present indicating the presence of silicon oxide [99–103] . Raman spectra for Ge oxide nanoparticles shows the presence and crystalline nature of Ge oxide nanoparticles.…”

Section: Resultsmentioning

confidence: 96%

“…The weak band at 1090 cm À 1 is also present indicating the presence of silicon oxide. [99][100][101][102][103] Raman spectra for Ge oxide nanoparticles shows the presence and crystalline nature of Ge oxide nanoparticles. The band at 575 cm À 1 is Raman actives modes (first order and second order) transverse optical phonon modes (TO and 2TO) are present which are TO modes of crystalline Ge.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis of Silicon and Germanium Oxide Nanostructures via Photonic Curing; a Facile Approach to Scale Up Fabrication

Khatoon,

Subedi,

Chrisey

2024

ChemistryOpen

View full text Add to dashboard Cite

Silicon and Germanium oxide (SiOx and GeOx) nanostructures are promising materials for energy storage applications due to their potentially high energy density, large lithiation capacity (~10X carbon), low toxicity, low cost, and high thermal stability. This work reports a unique approach to achieving controlled synthesis of SiOx and GeOx nanostructures via photonic curing. Unlike conventional methods like rapid thermal annealing, quenching during pulsed photonic curing occurs rapidly (sub‐millisecond), allowing the trapping of metastable states to form unique phases and nanostructures. We explored the possible underlying mechanism of photonic curing by incorporating laws of photophysics, photochemistry, and simulated temperature profile of thin film. The results show that photonic curing of spray coated 0.1 M molarity Si and Ge Acetyl Acetate precursor solution, at total fluence 80 J cm−2 can yield GeOx and SiOx nanostructures. The as‐synthesized nanostructures are ester functionalized due to photoinitiated chemical reactions in thin film during photonic curing. Results also showed that nanoparticle size changes from ~48 nm to ~11 nm if overall fluence is increased by increasing the number of pulses. These results are an important contribution towards large‐scale synthesis of the Ge and Si oxide nanostructured materials which is necessary for next‐generation energy storage devices.

show abstract

Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Synthesis of Silicon and Germanium Oxide Nanostructures via Photonic Curing; a Facile Approach to Scale Up Fabrication

Khatoon,

Subedi,

Chrisey

2024

ChemistryOpen

View full text Add to dashboard Cite

show abstract

“…The SPR peak of the Au–Pt/Mn 3 O 4 , Au–Pt/Mn 2 O 3 , and Au–Pt/AC catalysts is gradually red-shifted compared to Au–Pt/Mn x O y C z catalysts. According to Thao et al, the SPR peak is red-shifted when the particle diameter is increased. It is confirmed that Mn x O y C z has a better size limitation effect.…”

Section: Resultsmentioning

confidence: 96%

MOFs-Derived Mn_xO_yC_z Supported Bimetallic Au–Pt Catalyst for the Catalytic Oxidation of Glycerol to Glyceric Acid

Yu,

Ke,

Wang

et al. 2024

Chem. Mater.

View full text Add to dashboard Cite

The specific structure of the support and the interactions between the catalyst components can lead to electron transfer, which in turn could affect the catalytic performance in heterogeneous catalytic reactions. In this paper, we have successfully prepared Mn x O y C z composite materials from the calcination of the Mn-organic framework. Then bimetallic Au−Pt nanoparticles (NPs) were supported onto Mn x O y C z via the colloidal-deposition method. These catalysts were tested in the selective oxidation of glycerol to glyceric acid under basic conditions. The results demonstrated that the catalytic activity of the bimetallic Au−Pt/ Mn x O y C z catalyst is considerably superior to those of the monometallic (Au and Pt) supported catalysts. Under the optimized conditions, 100% of glycerol can convert with 57.3% selectivity of glyceric acid. Multicharacterizations showed that the strong interaction between Au and Pt in the Au−Pt/Mn x O y C z catalyst can enhance the dispersion of Au−Pt alloy NPs, promoting the electronic coupling effect on the metal surface. At the same time, the rich oxygen vacancies in this catalyst can facilitate the activation of oxygen, which causes the Au−Pt/Mn x O y C z catalyst to show better catalytic activity. Specifically, the interaction between Au and Pt not only decreases the particle size of the Au−Pt alloy NPs but also promotes the reduction of Mn-based oxides and the mobility of oxygen. The absence of Au leads to a decrease in Pt 4f 7/2 binding energy, resulting in an enrichment of electrons at the Pt active site and enhancing the oxidation ability of the primary hydroxyl group. In addition, the Au−Pt/Mn x O y C z catalyst showed excellent stability without substantial loss of activity after being recycled five times. The insights and methodology may provide some new guidance for the reasonable design of bimetallic catalysts for the catalytic oxidation of biopolyols under mild conditions.

show abstract

Quantitative and rapid lateral flow immunoassay for cardiac troponin I using dendritic mesoporous silica nanoparticles and gold nanoparticles

Li,

Yao,

Hua

et al. 2025

Anal. Methods

View full text Add to dashboard Cite

show abstract

Detailed Investigation of Factors Affecting the Synthesis of SiO2@Au for the Enhancement of Raman Spectroscopy

Cited by 3 publications

References 48 publications

Synthesis of Silicon and Germanium Oxide Nanostructures via Photonic Curing; a Facile Approach to Scale Up Fabrication

Synthesis of Silicon and Germanium Oxide Nanostructures via Photonic Curing; a Facile Approach to Scale Up Fabrication

MOFs-Derived Mn_xO_yC_z Supported Bimetallic Au–Pt Catalyst for the Catalytic Oxidation of Glycerol to Glyceric Acid

Quantitative and rapid lateral flow immunoassay for cardiac troponin I using dendritic mesoporous silica nanoparticles and gold nanoparticles

Contact Info

Product

Resources

About

Detailed Investigation of Factors Affecting the Synthesis of SiO2@Au for the Enhancement of Raman Spectroscopy

Cited by 3 publications

References 48 publications

Synthesis of Silicon and Germanium Oxide Nanostructures via Photonic Curing; a Facile Approach to Scale Up Fabrication

Synthesis of Silicon and Germanium Oxide Nanostructures via Photonic Curing; a Facile Approach to Scale Up Fabrication

MOFs-Derived MnxOyCz Supported Bimetallic Au–Pt Catalyst for the Catalytic Oxidation of Glycerol to Glyceric Acid

Quantitative and rapid lateral flow immunoassay for cardiac troponin I using dendritic mesoporous silica nanoparticles and gold nanoparticles

Contact Info

Product

Resources

About

MOFs-Derived Mn_xO_yC_z Supported Bimetallic Au–Pt Catalyst for the Catalytic Oxidation of Glycerol to Glyceric Acid