Matrix‐assisted laser ablation production of gold cluster ions from Au‐coated photonic crystals

Li, Jincheng; Liu, Jianan; Chen, Yi

doi:10.1002/jms.2994

Cited by 4 publications

(3 citation statements)

References 43 publications

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“…Recently, the method of matrix assisted laser ablation has been used to generate large size metal cluster ions. 13,14 For example, it has been found that HABA can act as a helpful matrix for the generation of gold cluster ions. 14 To see if this method can be applied here to generate larger phosphorus cluster ions, matrixes of HABA, DHB, and CHCA were also used in the experiments.…”

Section: Resultsmentioning

confidence: 99%

“…13,14 For example, it has been found that HABA can act as a helpful matrix for the generation of gold cluster ions. 14 To see if this method can be applied here to generate larger phosphorus cluster ions, matrixes of HABA, DHB, and CHCA were also used in the experiments. However, the existence of these matrixes did not help generate larger sized cations or anions in the laser ablation process.…”

Section: Resultsmentioning

confidence: 99%

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Size Effect on the Signal Intensity Difference between Odd- and Even-Numbered Phosphorus Cluster Ions

Kong¹

2013

Acta Physico-Chimica Sinica

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Intensity difference between odd-and even-numbered cluster ions is one of the characteristics of phosphorus clusters. Generally, for the clusters with cluster ion size n>25, intensities of odd-numbered cluster ions are much higher than those of their even-numbered neighbors. In order to better understand the size effect on the phenomenon, large phosphorus clusters (n~500) were generated by laser ablation on red phosphorus in vacuum. Their intensity distributions were also analyzed. Results show that the intensity difference between odd-and even-numbered cluster ions decreases with increasing cluster size for both cations and anions. Based on the observed trends for cations and anions, it can be estimated that the observed intensity alternation of even/odd numbered clusters may vanish for cluster ions with n>1000. These results exactly reflect the function of cluster as a bridge linking atoms in the gas phase and their bulk counterpart in the bulk phase.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Size Effect on the Signal Intensity Difference between Odd- and Even-Numbered Phosphorus Cluster Ions

Kong¹

2013

Acta Physico-Chimica Sinica

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“…We have therefore tried to develop a ligand-free, more reproducible assembling method, inspired by our works on the fabrication of photonic crystals (PCs) from particles [20][21][22][23]. Herein presented is an innovative method to produce monolayer PCs on silicon slides for an SERS assay of thiol substances.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Monolayer Photonic Crystals from Ag Nanobulge-Deposited SiO2 Particles as Substrates for Reproducible SERS Assay of Trace Thiol Pesticide

Zhang

Chen

2020

Nanomaterials

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Surface-enhanced Raman scattering (SERS) greatly increases the detection sensitivity of Raman scattering. However, its real applications are often degraded due to the unrepeatable preparation of SERS substrates. Herein presented is a very facile and cost-effective method to reproducibly produce a novel type of SERS substrate, a monolayer photonic crystal (PC). With a building block of laboratory-prepared monodisperse SiO2 particles deposited with space-tunable silver nanobulges (SiO2@nAg), a PC substrate was first assembled at the air–water interface through needle tip flowing, then transferred onto a silicon slide by a pulling technique. The transferred monolayer PCs were characterized by SEM and AFM to have a hexagonal close-packed lattice. They could increase Raman scattering intensity by up to 2.2 × 107-fold, as tested with p-aminothiophenol. The relative standard deviations were all below 5% among different substrates or among different locations on the same substrate. The excellent reproducibility was ascribed to the highly ordered structure of PCs, while the very high sensitivity was attributed to the strong hotspot effect caused by the appropriately high density of nanobulges deposited on SiO2 particles and by a closed lattice. The PC substrates were validated to be applicable to the SERS assay of trace thiol pesticides. Thiram pesticide is an example determined in apple juice samples at a concentration 102-fold lower than the food safety standard of China. This method is extendable to the analysis of other Raman-active thiol chemicals in different samples, and the substrate preparation approach can be modified for the fabrication of more PC substrates from other metallic nanobulge-deposited particles rather than silica only.

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Formation, distribution, and photoreaction of nano-sized vanadium oxide cluster anions

Yuan

Liu

et al. 2016

International Journal of Mass Spectrometry

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Matrix‐assisted laser ablation production of gold cluster ions from Au‐coated photonic crystals

Cited by 4 publications

References 43 publications

Size Effect on the Signal Intensity Difference between Odd- and Even-Numbered Phosphorus Cluster Ions

Size Effect on the Signal Intensity Difference between Odd- and Even-Numbered Phosphorus Cluster Ions

Preparation of Monolayer Photonic Crystals from Ag Nanobulge-Deposited SiO2 Particles as Substrates for Reproducible SERS Assay of Trace Thiol Pesticide

Formation, distribution, and photoreaction of nano-sized vanadium oxide cluster anions

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