Comparative characterisation of non-monodisperse gold nanoparticle populations by X-ray scattering and electron microscopy

Yang, Yuliang; Liao, Suiyang; Luo, Zhi; Qi, Runzhang; Fhionnlaoich, Niamh Mac; Stellacci, Francesco; Guldin, Stefan

doi:10.1039/c9nr09481d

Cited by 12 publications

(15 citation statements)

References 47 publications

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“…One difference of SAXS and EM is that SAXS probes comparably large ensembles, thus providing robust statistics, but without resolving individual particles, whereas EM allows for intuitive assessments of particle uniformity and dispersity, their arrangement and defects, but in a small region and with limited statistics. [166,167] As an example, consider the particles in Figure 2a. Both, SAXS and TEM analysis could provide a measurement of mean particle size and dispersity in good agreement.…”

Section: Characterization Of Nps Assemblies and Supercrystalsmentioning

confidence: 99%

“…Besides, SAXS allows precise measurement of particles sizes, shapes, and size distributions providing complementary information to EM methods. For instance, using Monte Carlo methods [230,231] different populations of Au NPs have recently been measured, [166] and the size evolution of NPs can be tracked in in situ experiments. [232]…”

Section: Small Angle X-ray Scattering (Saxs)mentioning

confidence: 99%

Section: Characterization Of Nps Assemblies and Supercrystalsmentioning

confidence: 99%

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Recent Notable Approaches to Study Self‐Assembly of Nanoparticles with X‐Ray Scattering and Electron Microscopy

Schulz

Lokteva

Parak

et al. 2021

Part & Part Syst Charact

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several issues far from being resolved: for many systems long-range periodic order is not routinely achieved, reproducibility is often not optimal and truly emergent and new properties arising from the supercrystal formation could be demonstrated for just a few systems. [3][4][5][6][7] From the materials science perspective there is no established figure of merit or common set of parameters allowing to quantify "quality" of NP superlattices and supercrystals. In lieu of such standard procedures, terms as well-ordered, crystalline order, quasicrystalline, etc., are usually used in literature. However, there exist no commonly accepted definitions of what qualifies, e.g., as "well-ordered."In this review, we want to highlight some recent experimental developments and new approaches to study self-assembly of NPs or structure formation of NP supercrystals and their final structure. We focus on NP, the broad field of photonic materials prepared by self-assembly of larger colloidal particles is not covered herein. [8][9][10] The introduction of the basic concepts of NP self-assembly will be kept short and should be considered as an overview, for more background and details excellent comprehensive reviews are available. [2,11] We will then briefly address and discuss the expectations associated with self-assembled materials, especially the proposed emergence of new properties directly related to order. In the second part of the review, we will present recent innovative approaches for the investigation of self-assembly and self-assembled structures that go beyond the standard characterization. We focus mainly on structure and structure formation and less on properties, so most of the studies are based on scattering and electron microscopy. Figure 1 provides an overview roughly following this outline. Self-Assembly of NanoparticlesSelf-assembly is a broad term and occurs on all scales from atoms, ions, and molecules to galaxies, as pointed out by Whitesides and Grzybowski. [12] It can be defined as the autonomous organization of multiple discrete components into ordered structures, driven by energetics or entropy or both. [2,13] In nature, countless examples of highly complex and functional structures resulting from self-assembly can be found, Self-assembly of nanoparticles (NPs) has evolved into a powerful tool for the synthesis of superstructures with tailored properties. The quality, diversity, and complexity of synthesized structures are continuously improving and fascinating new collective properties are demonstrated. At the same time, the rapid development of electron microscopy and synchrotron sources for X-rays has enabled new exciting experimental approaches to study structure and structure formation in the context of NP self-assembly. In this review, some recent studies and what can be learned from them are highlighted and discussed. It is started with a general introduction covering important concepts, experimental approaches, commonly obtained structures, the ideas of artificial atoms, and emerging properties a...

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Section: Characterization Of Nps Assemblies and Supercrystalsmentioning

confidence: 99%

Section: Small Angle X-ray Scattering (Saxs)mentioning

confidence: 99%

Section: Characterization Of Nps Assemblies and Supercrystalsmentioning

confidence: 99%

See 1 more Smart Citation

Recent Notable Approaches to Study Self‐Assembly of Nanoparticles with X‐Ray Scattering and Electron Microscopy

Schulz

Lokteva

Parak

et al. 2021

Part & Part Syst Charact

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“…Monodisperse AuNP solution can provide clearer diagnostic results [10] and precise delivery of ionizing radiation in radiotherapy [11] compared to polydisperse AuNP solution. To exploit these advantages, this study takes the approach through centrifugation method to produce a monodisperse AuNP solution.…”

Section: Synteza Polimerów Szczepionych Nanocząstkami Złota Z Wykorzystaniem Promieniowania Gammamentioning

confidence: 99%

Synthesis of polymer-grafted gold nanoparticles via gamma radiation

Mokhtar¹,

Hidzir²,

Rahman³

et al. 2021

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The research focused on the synthesis of poly(tetrafluoroethylene) (PTFE) grafted with gold nanoparticles (AuNP). The Turkevich method, one of the common techniques of AuNP synthesis, was used to obtain an AuNP solution with a nanoparticle size of 20 nm. The PTFE-AuNP samples were subsequently irradiated and the absorbed doses were 0.5, 2, 5, 10 and 20 kGy. It was noticed that samples irradiated with 0.5 and 2 kGy were less stable and less concentrated than samples irradiated with higher doses due to aggregation and formation of precipitation after 30 days.

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“…The SAXS data were fitted with double shell model consisting with the contribution from over‐all core‐shell structure, polymer chain and polystyrene (PS) core with Gaussian distribution. In another report, [ 22 ] non‐monodisperse population of gold nanoparticles were determined by SAXS and compared with TEM.…”

Section: Introductionmentioning

confidence: 99%

Synergistic Role of Model‐Independent and Model‐Dependent Approaches for Determining Size and Shape of Au Nanostructures Using SAXS

Vijay¹,

Kaur²,

Vaidya³

2022

Part & Part Syst Charact

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The main objective of this study is to showcase the use of synergistic utilization of model‐independent and model‐dependent approaches for analyzing small angle X‐ray scattering (SAXS) data to determine the shape and size of different nanostructures viz. spherical, nanorod, and core‐shell. Herein, different gold nanostructures viz. spherical, nanorod, and core‐shell are synthesized and analyzed using SAXS. First, the SAXS data are analyzed using Guinier law, PDDF (pair–distance distribution function) plots, double logarithmic plots, and electron density curves to get primary information about the size and shape of nanostructures. This information is utilized for choosing an appropriate model and initial input parameters for fitting the SAXS data. The observations obtained from SAXS studies are compared with transmission electron microscopy and UV–vis spectroscopy. It is believed that this study will help in understanding the analysis of SAXS data using a systematic and synergistic approach of utilizing the two methods. It is believed that the study will further add to the understanding of the technique as an alternative approach for transmission electron microscopy.

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Comparative characterisation of non-monodisperse gold nanoparticle populations by X-ray scattering and electron microscopy

Abstract: A cross-method comparison for quasi-monodisperse, polydisperse and bimodal gold nanoparticles of 2–7 nm in diameter between conventional image analysis of transmission electron micrographs and small-angle X-ray scattering with form-free Monte Carlo fitting.

Cited by 12 publications

References 47 publications

Recent Notable Approaches to Study Self‐Assembly of Nanoparticles with X‐Ray Scattering and Electron Microscopy

Recent Notable Approaches to Study Self‐Assembly of Nanoparticles with X‐Ray Scattering and Electron Microscopy

Synthesis of polymer-grafted gold nanoparticles via gamma radiation

Synergistic Role of Model‐Independent and Model‐Dependent Approaches for Determining Size and Shape of Au Nanostructures Using SAXS

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