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11 results for “Supraparticles”
Catalyst Supraparticles: Tuning the Structure of Spray‐Dried Pt/SiO2 Supraparticles via Salt‐Based Colloidal Manipulation to Control their Catalytic Performance
<p>This data publication is based on the metadata and raw datasets underlying the manuscript: P. Groppe, J. Reichstein, S. Carl, C. Cuadrado Collados, B.-J. Niebuur, K. Zhang, B. Apeleo Zubiri, J. Libuda, T. Kraus, T. Retzer, M. Thommes, E. Spiecker, S. Wintzheimer, K. Mandel, Catalyst Supraparticles: Tuning the Structure of Spray-Dried Pt/SiO2 Supraparticles via Salt-Based Colloidal Manipulation to Control their Catalytic Performance. Small 2024, 2310813. https://doi.org/10.1002/smll.202310813</p> <p>A detailed description of the dataset is given in the attached "Raw data assignment.xlsx"</p>
Influence of cation concentration and valence on the structure and texture of spray-dried supraparticles from colloidal silica dispersions
<p>These datasets display the raw data for the manuscript: Huanhuan Zhou, Philipp Groppe, Thomas Zimmermann, Susanne Wintzheimer, Karl Mandel, Influence of cation concentration and valence on the structure and texture of spray-dried supraparticles from colloidal silica dispersions, Journal of Colloid and Interface Science, Volume 658,<br>2024, Pages 199-208, https://doi.org/10.1016/j.jcis.2023.12.051.</p> <p>The data connection file serves as an explanation for all datasets and their connection to the data displayed in the manuscript.</p>
Nanoparticle clustering in supraparticles to control magnetic long-range interactions
<p>This data publication is based on the metadata and datasets underlying the manuscript: Nanoparticle clustering in supraparticles to control magnetic long-range interactions</p> <p>To tailor superparamagnetic iron oxide nanoparticles (SPIONs) to the specific needs of diverse application fields, it is essential to understand not only their intrinsic properties but also their interactions with each other. Theoretical models predicting/explaining the magnetization behavior of macroscopic samples containing millions of SPIONs are intricate due to the complexity of the underlying relaxation mechanisms in alternating fields. This study introduces supraparticles (SPs) as model architectures to empirically investigate magnetic interactions within and between large SPION clusters (> 100 nanoparticles). For this purpose, nanoparticle dispersions containing SPIONs and silica nanoparticles (SiO<sub>2</sub> NPs) as non‐magnetic building blocks are spray‐dried to form binary SPs. Selective salt‐induced agglomeration of the two building block types before spray‐drying is utilized to tailor SP architectures, including control over SPION cluster size, shape, and proximity. Magnetic particle spectroscopy (MPS), operating under ambient conditions, reveals altered magnetization behavior for different cluster structures. Not only the nearest SPION neighbors, but the whole cluster structure up to several micrometers is decisive for the magnetization behavior. This highlights the importance of long‐range magnetic interactions. This work presents a versatile approach for designing model architectures to advance empirical interaction studies between SPIONs in macroscopic samples.</p>
Customizable induction heating profiles: from tailored colloidally stable nanoparticles towards multi-stage heatable supraparticles
<p>This data publication is based on the metadata and datasets underlying the manuscript: "Inductively heatable nano- and supraparticles: from colloidally stable hot nanoparticles to supraparticles with customizable multi-stage heating profiles"</p> <p>Magnetic nanoparticles (NPs) are efficient heat mediators in induction heating. Originally explored for hyperthermia, their applications have broadened to industrial processes where temperature control is crucial. By adjusting the NP composition or morphology, magnetic characteristics such as Curie temperatures can be tailored, allowing control over maximum heating thresholds. These NPs are, however, usually designed for maximum heating rates at specific magnetic fields. In this work, the synthesis is presented for colloidally stable Co and ZnCo ferrite NPs with customizable maximum heating temperatures, and their combination within micron-scaled supraparticles (SPs). Maximum induction heating temperatures of ZnCo ferrite NPs are tuned between 150 and 220 °C, while customization of Co ferrite species yields temperatures between 200 and 350 °C. These distinct magnetic properties are exploited in the selective multi-stage heating of SPs consisting of both species. Here, ZnCo ferrite components heat up to a first temperature plateau at low alternating magnetic fields (AMF), while Co ferrite NPs reach higher temperatures at increased AMF. The precise control of induction heating thresholds through the adaptability of NPs offers a high degree of customizability which makes induction heating particularly attractive for applications requiring sequential or spatial heating, such as catalysis or debonding on demand.</p>
Fabrication of Spherical Colloidal Supraparticles via Membrane Emulsification
<p>This is the raw data for the manuscript "Fabrication of Spherical Colloidal Supraparticles via Membrane Emulsification".</p> <p>Abstract</p> <p>Colloidal supraparticles are micron-assemblies of primary particles. These supraparticles have potential application in photonic materials, catalysis, gas adsorption and drug delivery. Thus, synthesis of colloidal supraparticles with a narrow size distribution and high yield has become essential for their application in different fields of science and technology. Here, we demonstrate membrane emulsification as a high-throughput approach for fabricating spherical supraparticles with narrow size distribution and control over particle size and crystallinity. Spherical supraparticles with well-ordered surface structures are synthesized by generating emulsion droplets of an aqueous colloidal dispersion in fluorocarbon oil using a Shirasu Porous Glass membrane, followed by the consolidation of particles through water removal within the emulsion. We systematically investigate process parameters, including the flow rate of particle dispersion, particle concentration, and average pore diameter of the membrane on the mean size and size distribution of the supraparticles, revealing key factors governing supraparticle properties and production throughput. Comparative evaluation with commonly employed methods highlights the advantage of membrane emulsification, which combines well-defined internal structure and controlled supraparticle sizes with comparably high yields in the order of tens of grams per day. Importantly, in contrast to widely-used droplet-based microfluidics, membrane emulsification allows fabrication of supraparticles in non-fluorinated oil. Overall, membrane emulsification offers a simple yet versatile method for fabricating colloidal supraparticles with high quality and yield and may serve as a bridge between existing high-precision techniques such as droplet-based microfluidics and high-throughput processes with less control such as spray drying</p> <p>All data are sorted according to thier appearance in the figures of the main manuscript and the supporting infomation. All the plots data are stored as .xlsx format and content of the column can be found in the headlines, while data shown in the figures is marked in yellow. All the optical microscopy images are stored in .tif format and the file name includes scale bar value. </p> <p>DOI journal article: </p>
Safety Through Visibility: Tracing Hydrogen in Colors with Highly Customizable and Flexibly Applicable Supraparticle Additives
<p><span>This data publication is based on the metadata and datasets underlying the manuscript: <br>"Safety Through Visibility: Tracing Hydrogen in Colors with Highly Customizable and Flexibly Applicable Supraparticle Additive"</span></p> <p><span>Abstract:<br>The flammability of H2-air mixtures demands timely detection and precise localization of H2 leakages to ensure safety and targeted maintenance measures in the anticipated hydrogen economy. Herein, H2 indicator supraparticles (SPs) are demonstrated that meet this demand by making H2 visible to the naked eye by a rapid (ir)reversible color change. Their toolbox-like manufacturing from SiO2 nanoparticles (NPs), Pt NPs, and indicator dye molecules via spray-drying allows for engineering their structure, texture, and detection performance by systematically tuning their composition. It is demonstrated that decreasing the SiO2 NP size, increasing the Pt NP concentration, and adjusting the amount of dye molecules improve the SPs’ response times. This opens up the option for multidimensional customization of their detection performance. Furthermore, the toolbox of H2 indicator SPs containing the established resazurin system is expanded to other indicator dyes, which makes a color change and reversibility of choice feasible. H2 indicator SPs meet many of the target characteristics for H2 detectors, e.g., low limit of detection, cycle stability, and high selectivity. Moreover, the SPs’ particulate nature allows for their flexible application as an additive, e.g., in coatings or clothing, which enables the detection and localization of H2 leakages in relevant application scenarios.</span></p> <p><span> </span></p> <p><span>The data collected is from October 2023.** </span></p> <p><span>This file contains information about the instruments, software, materials, chemicals, and datasets used for this study (including processed and raw data of the figures in the manuscript).</span></p> <p><span>A detailed description of the dataset is given in the attached README.txt file.</span></p>
Enhanced Gas Adsorption Kinetics in Supraparticle-based MOF Materials
<p>This is the raw data for the manuscript:</p> <p>Enhanced Gas Adsorption Kinetics in Supraparticle-based MOF Materials, publlished in Advanced Materials.</p> <p>A read me file containing all descriptions can be found in the main folder of the zip file</p> <p>All data are sorted according to their appearance in the figures of the main manuscript</p>
Fluorescence properties of self assembled colloidal supraparticles from CdSe/CdS/ZnS nanocrystals
<p>Raw data of figures 2-6</p>
Molecular and structural insights into H2 indicator supraparticles: lowering the limit of detection by tuning incorporated catalyst nanoparticles
<p>Raw data from DRIFTS experiments, TEM and SEM microscopy, Zeta potential measurements, and TGA measurements for the article "Molecular and structural insights into H2 indicator supraparticles: lowering the limit of detection by tuning incorporated catalyst nanoparticles" published in Chemistry of Materials <a href="https://doi.org/10.1021/acs.chemmater.3c01105">https://doi.org/10.1021/acs.chemmater.3c01105</a>.</p>
Supraparticles on beads for supported catalytically active liquid metal solutions – the SCALMS suprabead concept
<p>Raw data for the article Supraparticles on beads for supported catalytically active liquid metal solutions – the SCALMS suprabead concept (DOI: 10.1039/D3MH01020A), including dynamic light scattering, ICP-AES, laser diffraction, nitrogen sorption, nano CT, propane dehydrogenation runs, photographs, SEM and EDX, TEM, and TPO measurements and analysis.</p>
Data from "Polyacrylic acid functionalized superparamagnetic iron-oxide supraparticles for highly efficient adsorption and removal of contaminants from water"
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