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Nanoparticles & colloids

Epsilon-Fe2O3 Nanocrystals inside Mesoporous Silicas with Tailored Morphologies of Rod, Platelet and Donut

Li, Jheng-Guang; Fornasieri, Giulia; Bleuzen, Anne; Gich, Martí; Impéror‐Clerc, Marianne

 ApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialNanoparticles & colloidsParticlesPorous materialSAXSTechnique

Epsilon-Fe2O3 Nanocrystals inside Mesoporous Silicas with Tailored Morphologies of Rod, Platelet and Donut

Li, Jheng-Guang; Fornasieri, Giulia; Bleuzen, Anne; Gich, Martí; Impéror‐Clerc, Marianne

The ϵ-Fe2O3 polymorph of iron oxide, which has outstanding physical properties, is successfully stabilized inside mesoporous silica particles with tailored shapes. Using mesoporous silica particles with three different morphologies of rod, platelet and donut, we obtain ϵ-Fe2O3/mesoporous silica nanocomposites. Iron oxide is loaded inside the porosity using a two steps…
Smart release of antimicrobial ZnO nanoplates from a pH-responsive keratin hydrogel

Villanueva, María E.; Cuestas, María L.; Pérez, Claudio J.; Campo Dall′ Orto, Viviana; Copello, Guillermo J.

 (Hydro)gelsCharacteristic dimensionCompositesCustomer publicationsNanoparticles & colloidsSAXSShape

Smart release of antimicrobial ZnO nanoplates from a pH-responsive keratin hydrogel

Villanueva, María E.; Cuestas, María L.; Pérez, Claudio J.; Campo Dall′ Orto, Viviana; Copello, Guillermo J.

A smart antibacterial biomaterial based on a keratin hydrogel with pH-dependent behavior and Zinc Oxide nanoplates as biocide agent has been developed. The pH of a chronic wound is basic due to bacterial metabolism. Originally shrank at acid pH, keratin hydrogels swell upon contact with a bacterial contaminated media leading…
Overcoming efficiency and stability limits in water-processing nanoparticular organic photovoltaics by minimizing microstructure defects

Xie, Chen; Heumüller, Thomas; Gruber, Wolfgang; Tang, Xiaofeng; Classen, Andrej; Schuldes, Isabel; Bidwell, Matthew; Späth, Andreas; Fink, Rainer H.; Unruh, Tobias; McCulloch, Iain; Li, Ning; Brabec, Christoph J.

 ApplicationCharacterizationCrystalline fractionCustomer publicationsGIWAXSMaterialNanoparticles & colloidsPhase analysisRenewable energySAXSSelf-assembled materialTechniqueThin filmsWAXS

Overcoming efficiency and stability limits in water-processing nanoparticular organic photovoltaics by minimizing microstructure defects

Xie, Chen; Heumüller, Thomas; Gruber, Wolfgang; Tang, Xiaofeng; Classen, Andrej; Schuldes, Isabel; Bidwell, Matthew; Späth, Andreas; Fink, Rainer H.; Unruh, Tobias; McCulloch, Iain; Li, Ning; Brabec, Christoph J.

Water-based semiconducting polymer nanoparticles are eco-friendly and non-toxic but their performance suffers from the surfactants. Here Xie et al. design an approach to minimize the amount of residual surfactant in these nanoparticles and make high-efficiency and stability solar…
Investigating Particle Size Effects in Catalysis by Applying a Size-Controlled and Surfactant-Free Synthesis of Colloidal Nanoparticles in Alkaline Ethylene Glycol: Case Study of the Oxygen Reduction Reaction on Pt

Quinson, Jonathan; Inaba, Masanori; Neumann, Sarah; Swane, Andreas A.; Bucher, J.; Simonsen, Søren B.; Theil Kuhn, Luise; Kirkensgaard, Jacob J. K.; Jensen, Kirsten M. Ø.; Oezaslan, Mehtap; Kunz, Sebastian; Arenz, Matthias

 ApplicationCatalystsCharacterizationCustomer publicationsInorganic materialsMaterialMetalsNanoparticles & colloidsParticle size and size distributionParticlesPorous materialSAXSTechnique

Investigating Particle Size Effects in Catalysis by Applying a Size-Controlled and Surfactant-Free Synthesis of Colloidal Nanoparticles in Alkaline Ethylene Glycol: Case Study of the Oxygen Reduction Reaction on Pt

Quinson, Jonathan; Inaba, Masanori; Neumann, Sarah; Swane, Andreas A.; Bucher, J.; Simonsen, Søren B.; Theil Kuhn, Luise; Kirkensgaard, Jacob J. K.; Jensen, Kirsten M. Ø.; Oezaslan, Mehtap; Kunz, Sebastian; Arenz, Matthias

Colloidal platinum nanoparticles are obtained via a surfactant-free polyol process in alkaline ethylene glycol. In this popular synthesis, ethylene glycol functions as solvent and reducing agent. The preparation procedure is known for its reproducibility to obtain 1–2 nm nanoparticles, but at the same time the controlled preparation of larger nanoparticles…
Quantitative Analysis of Semiconductor Nanocrystal Ensemble Optical Extinction

Staller, Corey M.; Agrawal, Ankit; Gibbs, Stephen L.; Cabezas, Camila A. Saez; Johns, Robert W.; Milliron, Delia J.

 ApplicationCharacterizationCustomer publicationsInorganic materialInorganic materialsMaterialMetalsNanoparticles & colloidsParticle size and size distributionParticlesSAXSShapeTechnique

Quantitative Analysis of Semiconductor Nanocrystal Ensemble Optical Extinction

Staller, Corey M.; Agrawal, Ankit; Gibbs, Stephen L.; Cabezas, Camila A. Saez; Johns, Robert W.; Milliron, Delia J.

The optical extinction coefficients of localized surface plasmon resonance (LSPR) in doped semiconductor nanocrystals (NCs) have intensities determined by the free charge carrier concentration and the mechanisms for damping the oscillation of those free carriers. We investigate the dependence of the extinction coefficient of tin-doped indium oxide (ITO) NCs on…
Conduction Band Fine Structure in Colloidal HgTe Quantum Dots

Hudson, Margaret H.; Chen, Menglu; Kamysbayev, Vladislav; Janke, Eric M.; Lan, Xinzheng; Allan, Guy; Delerue, Christophe; Lee, Byeongdu; Guyot-Sionnest, Philippe; Talapin, Dmitri V.

 ApplicationCharacterizationCustomer publicationsInorganic materialInorganic materialsMaterialNanoparticles & colloidsParticlesSAXSShapeTechnique

Conduction Band Fine Structure in Colloidal HgTe Quantum Dots

Hudson, Margaret H.; Chen, Menglu; Kamysbayev, Vladislav; Janke, Eric M.; Lan, Xinzheng; Allan, Guy; Delerue, Christophe; Lee, Byeongdu; Guyot-Sionnest, Philippe; Talapin, Dmitri V.

HgTe colloidal quantum dots (QDs) are of interest because quantum confinement of semimetallic bulk HgTe allows one to synthetically control the bandgap throughout the infrared. Here, we synthesize highly monodisperse HgTe QDs and tune their doping both chemically and electrochemically. The monodispersity of the QDs was evaluated using small-angle X-ray…
Polymer-Grafted Nanoparticle Membranes with Controllable Free Volume

Bilchak, Connor R.; Buenning, Eileen; Asai, Makoto; Zhang, Kai; Durning, Christopher J.; Kumar, Sanat K.; Huang, Yucheng; Benicewicz, Brian C.; Gidley, David W.; Cheng, Shiwang; Sokolov, Alexei P.; Minelli, Matteo; Doghieri, Ferruccio

 (Natural) polymersApplicationCharacteristic dimensionCharacterizationCustomer publicationsMaterialNanoparticles & colloidsOil & gasParticlesPolymer researchPorous materialSAXSTechnique

Polymer-Grafted Nanoparticle Membranes with Controllable Free Volume

Bilchak, Connor R.; Buenning, Eileen; Asai, Makoto; Zhang, Kai; Durning, Christopher J.; Kumar, Sanat K.; Huang, Yucheng; Benicewicz, Brian C.; Gidley, David W.; Cheng, Shiwang; Sokolov, Alexei P.; Minelli, Matteo; Doghieri, Ferruccio

Polymer-based membranes play a key role in several industrially important gas separation technologies, e.g., removing CO2 from natural gas, with enormous economic and environmental impact. Here, we develop a novel hybrid membrane construct comprised entirely of nanoparticles grafted with polymers. These membranes are shown to have broadly tunable separation performance…
Monodisperse hollow silica spheres: An in-depth scattering analysis

Ruckdeschel, Pia; Dulle, Martin; Honold, Tobias; Förster, Stephan; Karg, Matthias; Retsch, Markus

 ApplicationCharacterizationCustomer publicationsInorganic materialsMaterialNanoparticles & colloidsParticlesPorous materialSAXSShapeTechnique

Monodisperse hollow silica spheres: An in-depth scattering analysis

Ruckdeschel, Pia; Dulle, Martin; Honold, Tobias; Förster, Stephan; Karg, Matthias; Retsch, Markus

Herein, we fabricate hollow silica nanoparticles with exceptionally narrow size distributions that inherently possess two distinct length scales—tens of nanometers with regards to the shell thickness, and hundreds of nanometers in regards to the total diameter. We characterize these structures using dynamic and static light scattering (DLS and SLS), small…
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

 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…
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

 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…
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