Nanoparticles & colloids

(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
(Natural) polymersApplicationCharacterizationCustomer publicationsMaterialNanoparticles & colloidsParticle interactionsParticlesPhase analysisSAXSShapeSizeTechnique

Short and Soft: Multidomain Organization, Tunable Dynamics, and Jamming in Suspensions of Grafted Colloidal Cylinders with a Small Aspect Ratio

Parisi, Daniele; Ruan, Yingbo; Ochbaum, Guy; Silmore, Kevin S.; Cullari, Lucas L.; Liu, Chen-Yang; Bitton, Ronit; Regev, Oren; Swan, James W.; Loppinet, Benoit; Vlassopoulos, Dimitris

The yet virtually unexplored class of soft colloidal rods with a small aspect ratio is investigated and shown to exhibit a very rich phase and dynamic behavior, spanning from liquid to nearly melt state. Instead of the nematic order, these short and soft nanocylinders alter their organization with increasing concentration…
12 March 2021
ApplicationCharacterizationCustomer publicationsFractal dimensionInorganic materialMaterialNanoparticles & colloidsParticlesPhase analysisSAXSShapeSizeTechnique

Unraveling the Role of Alkali Cations in the Growth Mechanism of Gd2O2S Nanoparticles

Larquet, Clément; Carriere, David; Nguyen, Anh-Minh; Le, Thi Kim-Chi; Frogneux-Plé, Xavier; Génois, Isabelle; Le Griel, Patrick; Gauzzi, Andrea; Sanchez, Clément; Carenco, Sophie

Alkali cations are required for the colloidal synthesis of Ln2O2S nanoplates in organic solvent. Based on a thorough experimental analysis using various lanthanides and three alkali ions, we challenge the commonly accepted scenario of partial lanthanide substitution by the alkali, which is supposed to favor the sulfide insertion over the…
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
(Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialNanoparticles & colloidsOrientation analysisParticlesSAXSTechnique

Polymer-Induced Modification of Cellulose Nanocrystal Assemblies in Aqueous Suspensions

Cohen, Neta; Ochbaum, Guy; Levi-Kalisman, Yael; Bitton, Ronit; Yerushalmi-Rozen, Rachel

The effect of adsorbing, nonionic polymers on the phase behavior of cellulose nanocrystals (CNCs) is of interest for design and preparation of functional hybrids. CNC assembly into a chiral nematic phase (N*) was investigated in the presence of highly hydrated poly(vinyl alcohol) (HPVA), low hydrated PVA (LPVA), and poly(vinylpyrrolidone) (PVP).…
12 March 2021
(Hydro)gelsApplicationCharacterizationCustomer publicationsMaterialNanoparticles & colloidsProteins & DNA/RNASAXSShapeSizeTechniqueWAXS

Fibril Charge Affects α-Synuclein Hydrogel Rheological Properties

Pogostin, Brett H.; Linse, Sara; Olsson, Ulf

In this paper, we have investigated the interactions between ?-synuclein fibrils at different pH values and how this relates to hydrogel formation and gel properties. Using a combination of rheology, small-angle X-ray scattering, Raman spectroscopy, and cryo-transmission electron microscopy (cryo-TEM) experiments, we have been able to investigate the relationship between…
12 March 2021
(Natural) polymersApplicationCharacterizationCustomer publicationsMaterialNanoparticles & colloidsParticlesPolymer researchSAXSSelf-assembled materialShapeSizeTechnique

Anisotropic polymer nanoparticles with controlled dimensions from the morphological transformation of isotropic seeds

Hua, Zan; Jones, Joseph R.; Thomas, Marjolaine; Arno, Maria C.; Souslov, Anton; Wilks, Thomas R.; O’Reilly, Rachel K.

Understanding and controlling self-assembly processes at multiple length scales is vital if we are to design and create advanced materials. In particular, our ability to organise matter on the nanoscale has advanced considerably, but still lags far behind our skill in manipulating individual molecules. New tools allowing controlled nanoscale assembly…
12 March 2021
ApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialNanoparticles & colloidsOtherParticle interactionsPorous materialSAXSShapeSizeSurfactantsTechnique

A solvent-free porous liquid comprising hollow nanorod–polymer surfactant conjugates

Kumar, Raj; Dhasaiyan, Prabhu; Naveenkumar, Parinamipura M.; Sharma, Kamendra P.

Liquids having permanent porosity can offer significant processing advantages over their solid counterparts. This has recently led to tremendous activity towards the design and development of intrinsic pores in the liquid phase, predominantly for studies involving gas sequestration. We show here the development of a solvent-free mesoporous liquid material based…
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