Category

Particle size and size distribution

(Natural) polymersApplicationCharacteristic dimensionCharacterizationCompositesCustomer publicationsMaterialNanoparticles & colloidsParticle interactionsParticle size and size distributionPolymer researchSAXSShapeSizeTechnique

Effects of Hairy Nanoparticles on Polymer Crystallization Kinetics

Jimenez, Andrew M.; Krauskopf, Alejandro A.; Pérez-Camargo, Ricardo A.; Zhao, Dan; Pribyl, Julia; Jestin, Jacques; Benicewicz, Brian C.; Müller, Alejandro J.; Kumar, Sanat K.

We previously showed that nanoparticles (NPs) could be ordered into structures by using the growth rate of polymer crystals as the control variable. In particular, for slow enough spherulitic growth fronts, the NPs grafted with amorphous polymer chains are selectively moved into the interlamellar, interfibrillar, and interspherulitic zones of a…
12 March 2021
ApplicationCatalystsCharacterizationCustomer publicationsMaterialMetalsNanoparticles & colloidsParticle size and size distributionParticlesSAXSTechnique

Active site isolation in bismuth-poisoned Pd/SiO2 catalysts for selective hydrogenation of furfural

Cherkasov, Nikolay; Expósito, Antonio José; Aw, Moom Sinn; Fernández-García, Javier; Huband, Steven; Sloan, Jeremy; Paniwnyk, Larysa; Rebrov, Evgeny V.

Active site isolation in furfural (FA) hydrogenation was studied by poisoning a Pd catalyst with bismuth. A solution of FA in water was hydrogenated over a 5?wt% Pd/SiO2 catalyst in a batch reactor at various reaction temperatures and pressures. Furfuryl alcohol (FAL) was an intermediate product which was further hydrogenated…
12 March 2021
ApplicationCharacterizationCustomer publicationsInorganic materialMaterialNanoparticles & colloidsParticle size and size distributionParticlesSAXSTechnique

Exploiting In-Situ NMR to Monitor the Formation of a Metal-Organic Framework

Jones, Corey; Hughes, Colan; Yeung, Hamish; Paul, Alison; Harris, Kenneth D. M.; Easun, Timothy

The formation processes of metal-organic frameworks are increasingly widely researched using in-situ techniques, although there remains a scarcity of NMR studies in the field. In this work, the synthesis of MFM-500(Ni) has been investigated using the Combined Liquid- And Solid-State In?situ Crystallization NMR strategy, which provides information on the time-evolution…
12 March 2021
ApplicationCharacterizationCustomer publicationsInorganic materialMaterialNanoparticles & colloidsParticle size and size distributionParticlesPhase analysisSAXSTechniqueWAXS

Scalable synthesis of dispersible iron carbide (Fe3C) nanoparticles by ‘nanocasting’

Fletcher, D. C.; Hunter, R.; Xia, W.; Smales, G. J.; Pauw, B. R.; Blackburn, E.; Kulak, A.; Xin, Huolin; Schnepp, Z.

Metal carbides have shown great promise in a wide range of applications due to their unique catalytic, electrocatalytic and magnetic properties. However, the scalable production of dispersible metal carbide nanoparticles remains a challenge. Here, we report a simple and scalable route to dispersible iron carbide (Fe3C) nanoparticles. This uses MgO…
5 March 2021
ApplicationCharacteristic dimensionCharacterizationCompositesCustomer publicationsInorganic materialMaterialOtherParticle size and size distributionPorous materialSAXSSpecific surfaceTechniqueWAXS

TiO2-carbon nanoporous composites prepared via ZnO nanoparticle-templated carbonization of glucose adsorb and photodegrade organic pollutants in water

Barrera, Luis A.; Escobosa, Alma C.; Nevarez, Aileen; Dominguez, Noemi; Bañuelos, Jose L.; Westerhoff, Paul; Noveron, Juan C.

We report the ZnO nanoparticle-templated formation of nanoporous carbon (NTC) embedded with TiO2 nanoparticles for the adsorption and photodegradation of organic pollutants in water. Small-angle X-ray scattering (SAXS) studies indicate that NTC and NTC-TiO2 exhibit two types of porosities with average pore diameters of 2.8 and 11.5?nm, while Brunauer-Emmet-Teller (BET)…
5 March 2021
ApplicationCharacterizationCustomer publicationsMaterialMetalsNanoparticles & colloidsParticle size and size distributionParticlesSAXSShapeSizeTechnique

Two Growth Mechanisms of Thiol-Capped Gold Nanoparticles Controlled by Ligand Chemistry

Chen, Xuelian; Wei, Meng; Jiang, Shaohua; Förster, Stephan

Thiols play an important role in the synthesis of well-defined nanoparticles (NPs) with tailored properties, but their effects on the formation kinetics of NPs are still under investigation. Here, we used in situ small-angle X-ray scattering (SAXS)/UV–vis spectroscopy and time-dependent transmission electron microscopy (TEM) to elucidate the role of thiols…
27 January 2020
ApplicationCharacterizationCustomer publicationsInorganic materialMaterialNanoparticles & colloidsParticle size and size distributionParticlesSAXSTechnique

Rapid synthesis of [Au25(Cys)18] nanoclusters via carbon monoxide in microfluidic liquid-liquid segmented flow system and their antimicrobial performance

Huang, He; Hwang, Gi Byoung; Wu, Gaowei; Karu, Kersti; Du Toit, Hendrik; Wu, Han; Callison, June; Parkin, Ivan P.; Gavriilidis, Asterios

Atomically precise thiolate-gold nanoclusters with well-defined structures attract attention for use in various applications. However, most of the recently reported synthetic methods rely on prolonged synthesis times (a few hours to days) in order to produce high purity materials with a single cluster size. Such extended synthesis times make these…
27 January 2020
ApplicationCharacterizationCustomer publicationsInorganic materialMaterialNanoparticles & colloidsParticle size and size distributionParticlesSAXSTechnique

Single-step preparation of mono-dispersed sulfur nanoparticles for detention of copper

Shevchenko, Natalia; Steinhart, Milos; Tomšík, Elena

Application of sulfur nanoparticles results from biocompatibility, biodegradability, and non-toxicity of the shell that covers sulfur nanoparticles. However, to prepare uniform sulfur nanoparticles still remains a challenge; particularly in aqueous medium when the size of sulfur nanoparticles is not more than 20 nm. In the current work, the detailed investigation…
27 January 2020
ApplicationCharacterizationCustomer publicationsMaterialNanoparticles & colloidsParticle size and size distributionParticlesSAXSTechnique

A Cross-Method Comparison of Sub-10 nm Nanoparticle Size Distribution

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

Accurate nanoparticle (NP) size determination is essential across research domains, with many functions in nanoscience and biomedical research being size-dependent. Although transmission electron microscopy (TEM) is capable of resolving a single NP down to the sub-nm scale, the reliable representation of entire populations is plagued by challenges in providing statistical…
27 January 2020
ApplicationCharacterizationCustomer publicationsMaterialMetalsNanoparticles & colloidsOtherParticle size and size distributionParticlesSAXSTechniqueTemperature

An in situ SAXS investigation of the formation of silver nanoparticles and bimetallic silver–gold nanoparticles in controlled wet-chemical reduction synthesis

F. Garcia, Paulo R. A.; Prymak, Oleg; Grasmik, Viktoria; Pappert, Kevin; Wlysses, Wagner; Otubo, Larissa; Epple, Matthias; P. Oliveira, Cristiano L.

We present a study on the formation of silver (Ag) and bimetallic silver–gold (AgAu) nanoparticlesmonitored by in situ SAXS as well as by ex situ TEM, XRD and UV-vis analysis in a flow reactor at controlled reaction temperature. The formation mechanism of the nanoparticles is derived from the structural parameters…
27 January 2020