Localized surface plasmon resonance shift and its application in scanning near-field optical microscopy

Zhang, Jiawei; Kolhatkar, Gitanjali; Ruediger, Andréas

doi:10.1039/d1tc00877c

Cited by 14 publications

(15 citation statements)

References 83 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…LSPR frequency is strongly sensitive to the material of NPs, its size, shape, morphology, and surrounding medium [ 12 ]. By variation of these parameters, the LSPR can be tuned in a wide spectral range and optimized for exact sensing and spectroscopy application [ 13 , 14 ]. The interest in plasmonic NPs is even higher for multimetallic nanosystems such as bi- and trimetallic structures of various morphology and phase composition—alloys, core/shell, dimers, bimodal nanoparticles (Janus structure) etc.…”

Section: Introductionmentioning

confidence: 99%

Single Step Laser-Induced Deposition of Plasmonic Au, Ag, Pt Mono-, Bi- and Tri-Metallic Nanoparticles

et al. 2021

View full text Add to dashboard Cite

Multimetallic plasmonic systems usually have distinct advantages over monometallic nanoparticles due to the peculiarity of the electronic structure appearing in advanced functionality systems, which is of great importance in a variety of applications including catalysis and sensing. Despite several reported techniques, the controllable synthesis of multimetallic plasmonic nanoparticles in soft conditions is still a challenge. Here, mono-, bi- and tri-metallic nanoparticles were successfully obtained as a result of a single step laser-induced deposition approach from monometallic commercially available precursors. The process of nanoparticles formation is starting with photodecomposition of the metal precursor resulting in nucleation and the following growth of the metal phase. The deposited nanoparticles were studied comprehensively with various experimental techniques such as SEM, TEM, EDX, XPS, and UV-VIS absorption spectroscopy. The size of monometallic nanoparticles is strongly dependent on the type of metal: 140–200 nm for Au, 40–60 nm for Ag, 2–3 nm for Pt. Bi- and trimetallic nanoparticles were core-shell structures representing monometallic crystallites surrounded by an alloy of respective metals. The formation of an alloy phase took place between monometallic nanocrystallites of different metals in course of their growth and agglomeration stage.

show abstract

Section: Introductionmentioning

confidence: 99%

Single Step Laser-Induced Deposition of Plasmonic Au, Ag, Pt Mono-, Bi- and Tri-Metallic Nanoparticles

et al. 2021

View full text Add to dashboard Cite

show abstract

“…[17][18][19] The light harvesting range and nearfield distribu tion of LSPR rely heavily on the geometry, composition, and size of the plasmonic nanomaterials. [20][21][22][23] More interestingly, the nonradiative decay of localized sur face plasmon can generate highenergy "hot electrons," which are very helpful for reducing activation barriers and unlocking kinetically challenging multielectron reaction pathways. [24,25] Importantly, the photocatalytic kinetics reaction rate (R P ) of the plasmonic nanomaterial is supralinearly dependent on the inci dent light intensity (I) (R P ∝I n , n > 1; but n is only 0.5 for semi conductors).…”

mentioning

confidence: 99%

Plasmonic Active “Hot Spots”‐Confined Photocatalytic CO₂ Reduction with High Selectivity for CH₄ Production

et al. 2022

View full text Add to dashboard Cite

Plasmonic nanostructures have tremendous potential to be applied in photocatalytic CO 2 reduction, since their localized surface plasmon resonance can collect low-energy-photons to derive energetic "hot electrons" for reducing the CO 2 activation-barrier. However, the hot electron-driven CO 2 reduction is usually limited by poor efficiency and low selectivity for producing kinetically unfavorable hydrocarbons. Here, a new idea of plasmonic active "hot spot"confined photocatalysis is proposed to overcome this drawback. W 18 O 49 nanowires on the outer surface of Au nanoparticles-embedded TiO 2 electrospun nanofibers are assembled to obtain lots of Au/TiO 2 /W 18 O 49 sandwichlike substructures in the formed plasmonic heterostructure. The short distance (< 10 nm) between Au and adjacent W 18 O 49 can induce an intense plasmon-coupling to form the active "hot spots" in the substructures. These active "hot spots" are capable of not only gathering the incident light to enhance "hot electrons" generation and migration, but also capturing protons and CO through the dual-hetero-active-sites (Au-O-Ti and W-O-Ti) at the Au/TiO 2 /W 18 O 49 interface, as evidenced by systematic experiments and simulation analyses. Thus, during photocatalytic CO 2 reduction at 43± 2 °C, these active "hot spots" enriched in the well-designed Au/TiO 2 /W 18 O 49 plasmonic heterostructure can synergistically confine the hot-electron, proton, and CO intermediates for resulting in the CH 4 and CO productionrates at ≈35.55 and ≈2.57 µmol g −1 h −1 , respectively, and the CH 4 -product selectivity at ≈93.3%.

show abstract

“…Gold nanoparticles have unique optical properties due to localized surface plasmon resonance. 45,46 The ascorbic acid-reduced gold shows a peak at ∼579 nm (Fig. 3b).…”

Section: Resultsmentioning

confidence: 99%

Synthesis and degradation mechanism of renally excretable gold core–shell nanoparticles for combined photothermal and photodynamic therapy

et al. 2023

View full text Add to dashboard Cite

show abstract

Localized surface plasmon resonance shift and its application in scanning near-field optical microscopy

Abstract: The localized surface plasmon resonance (LSPR) position in tip-enhanced Raman spectroscopy (TERS) is of great importance to the understanding and interpretation of the relative intensity of different enhanced Raman modes....

Cited by 14 publications

References 83 publications

Single Step Laser-Induced Deposition of Plasmonic Au, Ag, Pt Mono-, Bi- and Tri-Metallic Nanoparticles

Single Step Laser-Induced Deposition of Plasmonic Au, Ag, Pt Mono-, Bi- and Tri-Metallic Nanoparticles

Plasmonic Active “Hot Spots”‐Confined Photocatalytic CO₂ Reduction with High Selectivity for CH₄ Production

Synthesis and degradation mechanism of renally excretable gold core–shell nanoparticles for combined photothermal and photodynamic therapy

Contact Info

Product

Resources

About

Localized surface plasmon resonance shift and its application in scanning near-field optical microscopy

Abstract: The localized surface plasmon resonance (LSPR) position in tip-enhanced Raman spectroscopy (TERS) is of great importance to the understanding and interpretation of the relative intensity of different enhanced Raman modes....

Cited by 14 publications

References 83 publications

Single Step Laser-Induced Deposition of Plasmonic Au, Ag, Pt Mono-, Bi- and Tri-Metallic Nanoparticles

Single Step Laser-Induced Deposition of Plasmonic Au, Ag, Pt Mono-, Bi- and Tri-Metallic Nanoparticles

Plasmonic Active “Hot Spots”‐Confined Photocatalytic CO2 Reduction with High Selectivity for CH4 Production

Synthesis and degradation mechanism of renally excretable gold core–shell nanoparticles for combined photothermal and photodynamic therapy

Contact Info

Product

Resources

About

Plasmonic Active “Hot Spots”‐Confined Photocatalytic CO₂ Reduction with High Selectivity for CH₄ Production