Size-controlled synthesis of cyclodextrin-capped gold nanoparticles for molecular recognition using surface-enhanced Raman scattering

Saito, Koichiro; McGehee, Keegan; Norikane, Yasuo

doi:10.1039/d1na00125f

Cited by 15 publications

(6 citation statements)

References 43 publications

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“…It is reported that π–Au interactions between PAHs and Au surfaces are negligible under ambient conditions. − In other words, PAHs are difficult to adsorb spontaneously to Ag and Au nanoparticles. The critical issues were the chemical modification and surface oxidation of the Ag and Au nanoparticle surface. ,, So far, there have been extensive computational and experimental studies showing that π–metal interactions on Au surfaces exist under ideal or nearly ideal circumstances where the metal crystal planes are exposed, well-defined, and placed under high vacuum to minimize the barriers to adsorption (Figure A) .…”

Section: Resultsmentioning

confidence: 99%

Observing π–Au Interaction between Aromatic Molecules and Single Au Nanodimers with a Subnanometer Gap by SERS

Zhou,

Li,

Xiao

et al. 2023

Anal. Chem.

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Interface interaction between aromatic molecules and noble metals plays a prominent role in fundamental science and technological applications. However, probing π−metal interactions under ambient conditions remains challenging, as it requires characterization techniques to have high sensitivity and molecular specificity without any restrictions on the sample. Herein, the interactions between polycyclic aromatic hydrocarbon (PAH) molecules and Au nanodimers with a subnanometer gap are investigated by surface-enhanced Raman spectroscopy (SERS). A cleaner and stronger plasmonic field of subnanometer gap Au nanodimer structures was constructed through solvent extraction. High sensitivity and strong π−Au interaction between PAHs and Au nanodimers are observed. Additionally, the density functional theory calculation confirmed the interactions of PAHs physically absorbed on the Au surface; the binding energy and differential charge further theoretically indicated the correlation between the sensitivity and the number of PAH rings, which is consistent with SERS experimental results. This work provides a new method to understand the interactions between aromatic molecules and noble metal surfaces in an ambient environment, also paving the way for designing the interfaces in the fields of catalysis, sensors, and molecular electronics.

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Section: Resultsmentioning

confidence: 99%

Observing π–Au Interaction between Aromatic Molecules and Single Au Nanodimers with a Subnanometer Gap by SERS

Zhou,

Li,

Xiao

et al. 2023

Anal. Chem.

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“…Organic dyes bound to solid surfaces via weak interactions (such as van der Waals' forces, π-stacking, etc. ) can display unpredictable optical/electronic behaviour, such as fluorescence enhancement/quenching, plasmon resonance enhanced fluorescence, 66 surface-enhanced Raman scattering (SERS), 67 and enhanced photo-induced catalytic ability, 68 etc. Such a hybrid material can be applied to specific applications in high-resolution imaging, analysis technologies and photocatalysis for energy conversion.…”

Section: The Optical Physical Properties Of Aggregated Pyrenesmentioning

confidence: 99%

Aggregation behaviour of pyrene-based luminescent materials, from molecular design and optical properties to application

Feng,

Wang,

Redshaw

et al. 2023

Chem. Soc. Rev.

110

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“…Nowadays, it has been reported that metal nanoparticles can be effectively stabilized with cyclodextrins to inhibit their aggregation. 24 Notably, β-Cyclodextrin (β-CD) with hydrophilic outer layers and hydrophobic cavity has been employed to encapsulate size-matched guest contaminants in solution. 25 Liu et al have indicated that the β-CD-modified catalyst exhibits moderate binding affinity, which facilitates the preferential accumulation of substrates and serves as a bridging agent between guest pollutants and the catalyst, thereby reducing the migration distance of pollutants to the catalyst surface.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Selective Degradation of Pharmaceutical and Personal Care Products by β-Cyclodextrin-Decorated ZIF-67 Nanocomposites in Reclaimed Water

Quan,

Chen,

Yin

et al. 2024

ACS Appl. Mater. Interfaces

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A peroxymonosulfate oxidation system was developed via modification of β-cyclodextrin (β-CD) on the surface of Fe 2+ -doped ZIF-67 (CD/Fe@ZIF-67) as an activator. The 99.7% carbamazepine, 91.3% bisphenol A (BPA), and 95.4% diclofenac (DCF) degradation efficiency were achieved within 10 min, 60, and 1 min, respectively. The hydrophobicity of these three pollutants is positively correlated with their adsorption kinetic constants by CD/Fe@ZIF-67 due to the introduction of β-CD. Scavenger experiments and electron spin resonance spectra confirmed that carbamazepine was preferentially oxidized by SO 4•− [λ(SO 4where SO 4 •− and O 2 •− played dominant roles in the degradation of BPA [λ(SO 4 •− )(71.7%) > λ(O 2 •− )(22.8%) > λ( • OH)(5.5%)], and O 2 •− was responsible for DCF removal [λ(O 2 •− ) = 93.2%].Additionally, the particulate catalyst was immobilized in the shell side of a ceramic membrane in a membrane reactor for catalyst recovery. This reactor achieved nearly 100% removal efficiency under optimal conditions: 0.036 wt % catalyst loading, 0.5 mM peroxymonosulfate concentration, 1 L inflow, 10 mg/L initial carbamazepine concentration, and 0.012 L/min hydraulic retention time. In summary, this study elucidates the active role of β-CD in a polymetallic/peroxymonosulfate system and provides valuable insights into the development of effective oxidation methods for pharmaceutical and personal care products in wastewater.

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Size-controlled synthesis of cyclodextrin-capped gold nanoparticles for molecular recognition using surface-enhanced Raman scattering

Abstract: Cyclodextrin (CD)-capped gold nanoparticles (AuNPs) can be applied in sensing, catalysis, and self-assembly processes due to their molecular recognition ability. As plasmon resonance of AuNPs depends on their size, the...

Cited by 15 publications

References 43 publications

Observing π–Au Interaction between Aromatic Molecules and Single Au Nanodimers with a Subnanometer Gap by SERS

Observing π–Au Interaction between Aromatic Molecules and Single Au Nanodimers with a Subnanometer Gap by SERS

Aggregation behaviour of pyrene-based luminescent materials, from molecular design and optical properties to application

Enhanced Selective Degradation of Pharmaceutical and Personal Care Products by β-Cyclodextrin-Decorated ZIF-67 Nanocomposites in Reclaimed Water

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