Category

Particle size and size distribution

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…
sergio.rodrigues@xenocs.com
27 January 2020
ApplicationCharacterizationCustomer publicationsMaterialNanoparticles & colloidsParticle size and size distributionParticlesSAXSTechnique

A robust expectation-maximization method for the interpretation of small-angle scattering data from dense nanoparticle samples

Bakry, M.; Haddar, H.; Bun?u, O.

A robust method is presented for the resolution of small-angle scattering problems featuring a structure factor. It is based on the local monodisperse approximation and the expectation-maximization…
sergio.rodrigues@xenocs.com
27 January 2020
ApplicationCharacterizationCustomer publicationsMaterialNanoparticles & colloidsParticle size and size distributionParticlesSAXSTechnique

Typical experiment vs. in-cell like conditions in magnetic hyperthermia: Effects of media viscosity and agglomeration

Bruvera, I. J.; Actis, D. G.; Calatayud, M. P.; Mendoza Zélis, P.

Magnetic nanoparticles (MNPs) can be used to transform electromagnetic energy into heat in hyperthermic treatment of cancer and other thermally activated therapies. The MNPs heating efficiency depends strongly on the combination of the MNPs’ structural properties and environmental conditions. MNPs hyperthermic yield is usually studied in diluted suspensions, although, in…
sergio.rodrigues@xenocs.com
25 November 2019
ApplicationCharacterizationCustomer publicationsMaterialNanoparticles & colloidsParticle interactionsParticle size and size distributionParticlesSAXSTechnique

Colloidal Solubility and Agglomeration of Apolar Nanoparticles in Different Solvents

Doblas, David; Kister, Thomas; Cano-Bonilla, Marina; González-García, Lola; Kraus, Tobias

We studied the concentration-dependent agglomeration of apolar nanoparticles in different solvents. Octanethiol-stabilized gold nanoparticles (AuNPs) in evaporating liquid droplets were observed in situ using small-angle X-ray scattering. Concurrent analysis of liquid volume and particle agglomeration provided time-dependent absolute concentrations of free and agglomerated particles. All…
sergio.rodrigues@xenocs.com
25 November 2019
ApplicationCharacterizationCustomer publicationsMaterialNanoparticles & colloidsParticle size and size distributionParticlesPhase analysisSAXSShapeSizeTechniqueWAXS

Combining Small-Angle X-ray Scattering and X-ray Powder Diffraction to Investigate Size, Shape and Crystallinity of Silver, Gold and Alloyed Silver-Gold Nanoparticles

Garcia, P. R. A. F.; Loza, K.; Daumann, S.; Grasmik, V.; Pappert, K.; Rostek, A.; Helmlinger, J.; Prymak, O.; Heggen, M.; Epple, M.; Oliveira, C. L. P.

The combination of simultaneous measurements of small and wide angle X-ray scattering (SAXS/WAXS–SWAXS) to investigate the overall size, shape, and crystallinity of silver nanoparticles and alloyed silver-gold nanoparticles in the size range of 8 to 80 nm is shown. The obtained results for overall size are in agreement with the…
sergio.rodrigues@xenocs.com
18 July 2019
Customer publicationsParticle size and size distributionProteins & DNA/RNASAXSShapeStructural biology

Size-exclusion chromatography small-angle X-ray scattering of water soluble proteins on a laboratory instrument

S. Bucciarelli, S. R. Midtgaard, M. Nors Pedersen, S. Skou, L. Arleth and B. Vestergaard

Coupling of size-exclusion chromatography with biological solution small-angle X-ray scattering (SEC-SAXS) on dedicated synchrotron beamlines enables structural analysis of challenging samples such as labile proteins and low-affinity complexes...
Marie
8 April 2019
ApplicationCatalystsCharacterizationCustomer publicationsInorganic materialsMaterialNanoparticles & colloidsParticle size and size distributionParticlesPhase analysisPorous materialSAXSTechnique

Highly Selective Continuous Flow Hydrogenation of Cinnamaldehyde to Cinnamyl Alcohol in a Pt/SiO2 Coated Tube Reactor

Bai, Yang; Cherkasov, Nikolay; Huband, Steven; Walker, David; Walton, Richard; Rebrov, Evgeny;

A novel continuous flow process for selective hydrogenation of α, β-unsaturated aldehyde (cinnamaldehyde, CAL) to the unsaturated alcohol (cinnamyl alcohol, COL) has been reported in a tube reactor coated with a Pt/SiO2 catalyst. A 90% selectivity towards the unsaturated alcohol was obtained at the aldehyde conversion of 98.8%. This is…
Xenocs
12 March 2019
ApplicationCharacterizationCustomer publicationsInorganic materialsMaterialNanoparticles & colloidsParticle size and size distributionParticlesSAXSTechnique

Precursor non-stoichiometry to enable improved CH3NH3PbBr3 nanocrystal LED performance

Chandran, Bevita K.; Veldhuis, Sjoerd A.; Chin, Xin Yu; Bruno, Annalisa; Yantara, Natalia; Chen, Xiaodong; Mhaisalkar, Subodh

High photoluminescence quantum yields and narrow emission wavelengths, combined with low temperature solution processing, make CH3NH3PbBr3 nanocrystals (NCs) favorable candidates for light-emitting applications. Herein, we describe the synthesis of CH3NH3PbBr3 NC inks by a convenient room-temperature ligand assisted reprecipitation protocol. We further investigate the effect of modulation of the…
Xenocs
12 March 2019
ApplicationCharacterizationCustomer publicationsInorganic materialInorganic materialsMaterialNanoparticles & colloidsParticle size and size distributionParticlesSAXSTechnique

Contribution to Accurate Spherical Gold Nanoparticle Size Determination by Single-Particle Inductively Coupled Mass Spectrometry: A Comparison with Small-Angle X-ray Scattering

Geertsen, Valérie; Barruet, Elodie; Gobeaux, Frédéric; Lacour, Jean-Luc; Taché, Olivier

Small-angle X-ray scattering spectroscopy (SAXS) is the method of choice for nanoparticle diameter and concentration determination. On the one hand, it is metrologically traceable for spherical nanoparticle mean diameter determination and does not require any sample preparation or calibration. On the other hand, single-particle inductively coupled mass spectrometry (SPICPMS) is…
Xenocs
12 March 2019