Size-dependent emission of negative ions from gold nanoparticles bombarded with C60 and Au400

Liang, Chao-Kai; Verkhoturov, Stanislav V.; Chen, Li-Jung; Schweikert, E. A.

doi:10.1016/j.ijms.2012.10.003

Cited by 20 publications

(15 citation statements)

References 20 publications

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“…Simultaneously ejected negative secondary ions (SIs) were analyzed with a custom‐built reflectron time‐of‐flight mass spectrometer, with an eight‐anode microchannel plate detector. The signals were processed through a time‐to‐digital converter …”

Section: Methodsmentioning

confidence: 99%

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Nanodomain analysis with cluster‐SIMS: application to the characterization of macromolecular brush architecture

Yang

Cho

Sun

et al. 2015

Surface & Interface Analysis

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We present the application of cluster‐SIMS for the analysis of the nanoscopic surface of diblock brush terpolymers (DBTs). This novel SIMS technique differs from conventional SIMS. It uses Au4004+ projectiles at 520 keV and an event‐by‐event bombardment/detection regime for the analysis of co‐localized molecular species. The performance of this SIMS method was tested on ‘bottle brush’ block molecules featuring a vertical aligned backbone structure. We were able to assess the extent of secondary ion emissions from the surface and analyze the degree of ordered alignment for DBTs by the fluorocarbon surface coverage. We demonstrate the feasibility of characterizing the homogeneity of macromolecular films at the nanoscale. Copyright © 2015 John Wiley & Sons, Ltd.

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Section: Methodsmentioning

confidence: 99%

“…The data acquired in this event‐by‐event mode were processed with custom developed software (SAMPI) . Co‐emission mass spectra including an SI of interest were extracted from the records of the individual impacts . This procedure identifies molecules co‐located within 10–20 nm in a non‐mapping mode.…”

Section: Methodsmentioning

confidence: 99%

Nanodomain analysis with cluster‐SIMS: application to the characterization of macromolecular brush architecture

Yang

Cho

Sun

et al. 2015

Surface & Interface Analysis

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“…An impact may yield one or multiple Au 2 − . It should be noted that Au 2 − originates from impacts on the NPs, as impacts on the neat substrate yield virtually no Au 2 − signal [22]. The difference in the type of impact is seen in a shift of 1ns in the Au 2 − peak (Figure4).…”

Section: Non-equivalency Of Impactsmentioning

confidence: 99%

Mass Spectrometry of Nanoparticles is Different

Liang

Eller

Verkhoturov

et al. 2015

J. Am. Soc. Mass Spectrom.

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Abstract. Secondary ion mass spectrometry, SIMS, is a method of choice for the characterization of nanoparticles, NPs. For NPs with large surface-to-volume ratios, heterogeneity is a concern. Assays should thus be on individual nano-objects rather than an ensemble of NPs; however, this may be difficult or impossible. This limitation can be side-stepped by probing a large number of dispersed NPs one-by-one and recording the emission from each NP separately. A large collection of NPs will likely contain subsets of like-NPs. The experimental approach is to disperse the NPs and hit an individual NP with a single massive cluster (e.g., C-60, Au-400). At impact energies of~1keV/atom, they generate notable secondary ion (SI) emission. Examination of small NPs (≤20nm in diameter) shows that the SI emission is sizedependent and impacts are not all equivalent. Accurate identification of the type of impact is key for qualitative assays of core or outer shell composition. For quantitative assays, the concept of effective impacts is introduced. Selection of co-emitted ejecta combined with rejection (anticoincidence) of substrate ions allows refining chemical information within the projectile interaction volume. Last, to maximize the SI signal, small NPs (≤5nm in diameter) can be examined in the transmission mode where the SI yields are enhanced~10-fold over those in the (conventional) reflection direction. Future endeavors should focus on schemes acquiring SIs, electrons, and photons concurrently.

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“…The paper reportedly demonstrated the rst use of conventional SIMS to determine the doping density with excellent depth resolution and analytical accuracy for nanowire-based materials. A paper by Ling et al 184 , respectively. The technique of LIBS has been used by Zhang et al 185 for the analysis of titanium dioxide nanoparticle aerosols during ame synthesis.…”

Section: Forensic Applicationsmentioning

confidence: 99%

Atomic spectrometry update: review of advances in the analysis of metals, chemicals and materials

Carter

Clough

Fisher

et al. 2018

J. Anal. At. Spectrom.

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Size-dependent emission of negative ions from gold nanoparticles bombarded with C60 and Au400

Cited by 20 publications

References 20 publications

Nanodomain analysis with cluster‐SIMS: application to the characterization of macromolecular brush architecture

Nanodomain analysis with cluster‐SIMS: application to the characterization of macromolecular brush architecture

Mass Spectrometry of Nanoparticles is Different

Atomic spectrometry update: review of advances in the analysis of metals, chemicals and materials

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