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Nanoparticles & colloids

Preparation and liquid crystal phase properties of discotic cellulose nanoparticles

Li, Chenxi; Evans, Julian; Wang, Nan; Guo, Tingbiao; He, Sailing

 (Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialNanoparticles & colloidsParticlesSAXSTechnique

Preparation and liquid crystal phase properties of discotic cellulose nanoparticles

Li, Chenxi; Evans, Julian; Wang, Nan; Guo, Tingbiao; He, Sailing

Understanding the behavior of fluids with inhomogeneous structural properties is critical for many industrial and biological materials. Sulfuric acid hydrolysis of cotton with ultrasonic treatment and low-speed centrifugation during purification yields “spiky” discotic cellulose particles. Amorphous cellulose remained in solution and forms discotic units which may be nucleated by crystalline…
Microwave-Assisted Synthesis of Ultrasmall Zinc Oxide Nanoparticles

Saloga, Patrick E. J.; Thünemann, Andreas F.

 ApplicationCharacterizationCustomer publicationsMaterialNanoparticles & colloidsParticlesPore size and pore size distributionTechniqueWAXS

Microwave-Assisted Synthesis of Ultrasmall Zinc Oxide Nanoparticles

Saloga, Patrick E. J.; Thünemann, Andreas F.

We report on ultrasmall zinc oxide single-crystalline nanoparticles of narrow size distribution and long-term colloidal stability. These oleate-stabilized nanoparticles were synthesized using microwave-assisted synthesis for 5 min, corresponding to a 99% decrease in synthesis time, when compared to the conventional synthesis method. It was observed that the average particle radius…
Solvent-non-solvent rapid-injection for preparing nanostructured materials from micelles to hydrogels

Lang, Chao; LaNasa, Jacob A.; Utomo, Nyalaliska; Xu, Yifan; Nelson, Melissa J.; Song, Woochul; Hickner, Michael A.; Colby, Ralph H.; Kumar, Manish; Hickey, Robert J.

 (Hydro)gels(Natural) polymersApplicationCharacterizationCustomer publicationsMaterialNanoparticles & colloidsSAXSSelf-assembled materialShapeSizeTechnique

Solvent-non-solvent rapid-injection for preparing nanostructured materials from micelles to hydrogels

Lang, Chao; LaNasa, Jacob A.; Utomo, Nyalaliska; Xu, Yifan; Nelson, Melissa J.; Song, Woochul; Hickner, Michael A.; Colby, Ralph H.; Kumar, Manish; Hickey, Robert J.

Due to their distinctive molecular architecture, ABA triblock copolymers will undergo specific self-assembly processes into various nanostructures upon introduction into a B-block selective solvent. Although much of the focus in ABA triblock copolymer self-assembly has been on equilibrium nanostructures, little attention has been paid to the guiding principles of nanostructure…
A robust expectation-maximization method for the interpretation of small-angle scattering data from dense nanoparticle samples

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

 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…
Ligand Shell Structure in Lead Sulfide–Oleic Acid Colloidal Quantum Dots Revealed by Small-Angle Scattering

Weir, Michael P.; Toolan, Daniel T. W.; Kilbride, Rachel C.; Penfold, Nicholas J. W.; Washington, Adam L.; King, Stephen M.; Xiao, James; Zhang, Zhilong; Gray, Victor; Dowland, Simon; Winkel, Jurjen; Greenham, Neil C.; Friend, Richard H.; Rao, Akshay; Ryan, Anthony J.; Jones, Richard A. L.

 ApplicationCharacterizationCustomer publicationsMaterialNanoparticles & colloidsParticlesSAXSShapeSizeTechnique

Ligand Shell Structure in Lead Sulfide–Oleic Acid Colloidal Quantum Dots Revealed by Small-Angle Scattering

Weir, Michael P.; Toolan, Daniel T. W.; Kilbride, Rachel C.; Penfold, Nicholas J. W.; Washington, Adam L.; King, Stephen M.; Xiao, James; Zhang, Zhilong; Gray, Victor; Dowland, Simon; Winkel, Jurjen; Greenham, Neil C.; Friend, Richard H.; Rao, Akshay; Ryan, Anthony J.; Jones, Richard A. L.

Nanocrystal quantum dots are generally coated with an organic ligand layer. These layers are a necessary consequence of their chemical synthesis, and in addition they play a key role in controlling the optical and electronic properties of the system. Here we describe a method for quantitative measurement of the ligand…
Controlling Crystal Texture in Programmable Atom Equivalent Thin Films

Gabrys, Paul A.; Macfarlane, Robert J.

 ApplicationCharacterizationCustomer publicationsMaterialNanoparticles & colloidsParticlesPhase analysisProteins & DNA/RNASAXSTechnique

Controlling Crystal Texture in Programmable Atom Equivalent Thin Films

Gabrys, Paul A.; Macfarlane, Robert J.

DNA is a powerful tool in the directed assembly of nanoparticle based superlattice materials, as the predictable nature of Watson–Crick base pairing allows DNA-grafted particles to be programmably assembled into unit cells that arise from the complete control of nanoparticle coordination environment within the lattice. However, while the local environment…
Shape modulation of squaramide-based supramolecular polymer nanoparticles

Talens, Victorio Saez; Makurat, D. M. M.; Liu, Tingxian; Dai, Wei; Guibert, Clément; Noteborn, Willem E. M.; Voets, Ilja K.; Kieltyka, Roxanne E.

 (Natural) polymersApplicationCharacterizationCustomer publicationsMaterialNanoparticles & colloidsParticlesSAXSSelf-assembled materialShapeSizeTechnique

Shape modulation of squaramide-based supramolecular polymer nanoparticles

Talens, Victorio Saez; Makurat, D. M. M.; Liu, Tingxian; Dai, Wei; Guibert, Clément; Noteborn, Willem E. M.; Voets, Ilja K.; Kieltyka, Roxanne E.

We report the synthesis and self-assembly of a library of squaramide-based bolaamphiphiles with variable hydrophobic and hydrophilic domain sizes, consisting of varied aliphatic chains (n = 2 to 12 methylene repeat units) and linear oligo(ethylene glycol) (m = 11 to 36 repeat units), to understand their effect on the formation…
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.

 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…
Translation of nanomedicines from lab to industrial scale synthesis: The case of squalene-adenosine nanoparticles

Dormont, Flavio; Rouquette, Marie; Mahatsekake, Clement; Gobeaux, Frédéric; Peramo, Arnaud; Brusini, Romain; Calet, Serge; Testard, Fabienne; Lepetre-Mouelhi, Sinda; Desmaële, Didier; Varna, Mariana; Couvreur, Patrick

 ApplicationCharacterizationCustomer publicationsMaterialNanoparticles & colloidsParticlesPhase analysisSAXSTechnique

Translation of nanomedicines from lab to industrial scale synthesis: The case of squalene-adenosine nanoparticles

Dormont, Flavio; Rouquette, Marie; Mahatsekake, Clement; Gobeaux, Frédéric; Peramo, Arnaud; Brusini, Romain; Calet, Serge; Testard, Fabienne; Lepetre-Mouelhi, Sinda; Desmaële, Didier; Varna, Mariana; Couvreur, Patrick

A large variety of nanoparticle-based delivery systems have become increasingly important for diagnostic and/or therapeutic applications. Yet, the numerous physical and chemical parameters that influence both the biological and colloidal properties of nanoparticles remain poorly understood. This complicates the ability to reliably produce and deliver well-defined nanocarriers which often leads…
Colloidal Solubility and Agglomeration of Apolar Nanoparticles in Different Solvents

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

 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…
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