Mono-6-Deoxy-6-Aminopropylamino-β-Cyclodextrin on Ag-Embedded SiO2 Nanoparticle as a Selectively Capturing Ligand to Flavonoids

Hahm, Eunil; Kang, Eun Ji; Pham, Xuan‐Hung; Jeong, Dae‐Yong; Jeong, Dae Hong; Jung, Seunho; Jun, Bong‐Hyun

doi:10.3390/nano9101349

Cited by 9 publications

(4 citation statements)

References 39 publications

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“…SiO 2 @Ag as nanocomposites were synthesized as pre-reported [ 50 , 51 ]. Briefly, SiO 2 NPs (153 ± 2.4 nm) were prepared by the modified Stöber method and were incubated with 3-mercaptopropyl trimethoxysilane (MPTS) to convert hydroxyl groups to thiol groups.…”

Section: Resultsmentioning

confidence: 99%

Silica Shell Thickness-Dependent Fluorescence Properties of SiO2@Ag@SiO2@QDs Nanocomposites

Hahm

Jo²,

Lee³

et al. 2022

IJMS

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Silica shell coatings, which constitute important technology for nanoparticle (NP) developments, are utilized in many applications. The silica shell’s thickness greatly affects distance-dependent optical properties, such as metal-enhanced fluorescence (MEF) and fluorescence quenching in plasmonic nanocomposites. However, the precise control of silica-shell thicknesses has been mainly conducted on single metal NPs, and rarely on complex nanocomposites. In this study, silica shell-coated Ag nanoparticle-assembled silica nanoparticles (SiO2@Ag@SiO2), with finely controlled silica shell thicknesses (4 nm to 38 nm), were prepared, and quantum dots (QDs) were introduced onto SiO2@Ag@SiO2. The dominant effect between plasmonic quenching and MEF was defined depending on the thickness of the silica shell between Ag and QDs. When the distance between Ag NPs to QDs was less than ~10 nm, SiO2@Ag@SiO2@QDs showed weaker fluorescence intensities than SiO2@QD (without metal) due to the quenching effect. On the other hand, when the distance between Ag NPs to QDs was from 10 nm to 14 nm, the fluorescence intensity of SiO2@Ag@SiO2@QD was stronger than SiO2@QDs due to MEF. The results provide background knowledge for controlling the thickness of silica shells in metal-containing nanocomposites and facilitate the development of potential applications utilizing the optimal plasmonic phenomenon.

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Section: Resultsmentioning

confidence: 99%

Silica Shell Thickness-Dependent Fluorescence Properties of SiO2@Ag@SiO2@QDs Nanocomposites

Hahm

Jo²,

Lee³

et al. 2022

IJMS

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“…[17][18][19] In a traditional clinical setting or at the point of care (POC) arena, many diagnoses require extremely short turnaround times from sample collection to an operational result. [20][21][22][23][24] Therefore a fast, sensitive, simple, and portable on-site analytical method is needed urgently to be developed.…”

Section: Introductionmentioning

confidence: 99%

Surface‐enhanced Raman spectroscopy for on‐site analysis: A review of recent developments

Gong

Wang

et al. 2020

Luminescence

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On‐site identification and quantification of chemicals is critical for promoting food safety, human health, homeland security risk assessment, and disease diagnosis. Surface‐enhanced Raman spectroscopy (SERS) has been widely considered as a promising method for on‐site analysis due to the advantages of nondestructive, abundant molecular information, and outstanding sensitivity. However, SERS for on‐site application has been restricted not only by the cost, performance, and portability of portable Raman instruments, but also by the sampling ability and signal enhancing performance of the SERS substrates. In recent years, the performance of SERS for on‐site analysis has been improved through portable Raman instruments, SERS substrates, and other combined technologies. In this review, popular commercial portable Raman spectrometers and the related technologies for on‐site analysis are compared. In addition, different types of SERS substrates for on‐site application are summarized. SERS combined with other technologies, such as electrochemical and microfluidics are also presented. The future perspective of SERS for on‐site analysis is also discussed.

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“…The use of a template, such as silica particles or polymer beads, to accumulate silver or gold nanoparticles (NPs) has been widely established in order to control particle size [20][21][22][23][24][25][26][27][28]. Recently, our group produced an Au-Ag alloy on silica nanoparticles as a highly sensitive and reliable SERS probe that can detect molecular targets at very low concentrations [29][30][31][32][33][34][35][36][37][38][39][40][41][42]. Based on these studies, we investigated histamine detection using an Au-Ag alloy on silica particles as a material for SERS.…”

Section: Introductionmentioning

confidence: 99%

Facile Histamine Detection by Surface-Enhanced Raman Scattering Using SiO2@Au@Ag Alloy Nanoparticles

Huynh

Pham

Hahm

et al. 2020

IJMS

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Histamine intoxication associated with seafood consumption represents a global health problem. The consumption of high concentrations of histamine can cause illnesses ranging from light symptoms, such as a prickling sensation, to death. In this study, gold–silver alloy-embedded silica (SiO2@Au@Ag) nanoparticles were created to detect histamine using surface-enhanced Raman scattering (SERS). The optimal histamine SERS signal was measured following incubation with 125 μg/mL of SiO2@Au@Ag for 2 h, with a material-to-histamine solution volume ratio of 1:5 and a phosphate-buffered saline-Tween 20 (PBS-T) solvent at pH 7. The SERS intensity of the histamine increased proportionally with the increase in histamine concentration in the range 0.1–0.8 mM, with a limit of detection of 3.698 ppm. Our findings demonstrate the applicability of SERS using nanomaterials for histamine detection. In addition, this study demonstrates that nanoalloys could have a broad application in the future.

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Mono-6-Deoxy-6-Aminopropylamino-β-Cyclodextrin on Ag-Embedded SiO2 Nanoparticle as a Selectively Capturing Ligand to Flavonoids

Cited by 9 publications

References 39 publications

Silica Shell Thickness-Dependent Fluorescence Properties of SiO2@Ag@SiO2@QDs Nanocomposites

Silica Shell Thickness-Dependent Fluorescence Properties of SiO2@Ag@SiO2@QDs Nanocomposites

Surface‐enhanced Raman spectroscopy for on‐site analysis: A review of recent developments

Facile Histamine Detection by Surface-Enhanced Raman Scattering Using SiO2@Au@Ag Alloy Nanoparticles

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