摘要 : <ce:abstract xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns="http://www.elsevier.com/xml/ja/dtd" id="abs0005" class="graphical" view="all"><ce:section-title id="sect0005">Graphical abstract</ce:section-title><ce:abstract-... 展开 <ce:abstract xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns="http://www.elsevier.com/xml/ja/dtd" id="abs0005" class="graphical" view="all"><ce:section-title id="sect0005">Graphical abstract</ce:section-title><ce:abstract-sec id="abst0005" view="all"><ce:simple-para>Display Omitted</ce:simple-para></ce:abstract-sec></ce:abstract><ce:abstract xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns="http://www.elsevier.com/xml/ja/dtd" id="abs0010" class="author-highlights" view="all"><ce:section-title id="sect0010">Highlights</ce:section-title><ce:abstract-sec id="abst0010" view="all"><ce:simple-para id="spar0040" view="all"><ce:list id="lis0005"><ce:list-item id="lsti0005"><ce:label>•</ce:label><ce:para id="par0005" view="all">Detailed particles size distribution analysis of monomodal gold colloids and bimodal mixtures prepared by pulsed laser ablation in liquids.</ce:para></ce:list-item><ce:list-item id="lsti0010"><ce:label>•</ce:label><ce:para id="par0010" view="all">Small-angle X-ray scattering is able to resolve bimodal size distributions if the size fractions do not overlap.</ce:para></ce:list-item><ce:list-item id="lsti0015"><ce:label>•</ce:label><ce:para id="par0015" view="all">Scattering techniques cannot distinguish between the fractions of bimodal colloids with overlapping size fractions.</ce:para></ce:list-item><ce:list-item id="lsti0020"><ce:label>•</ce:label><ce:para id="par0020" view="all">Electron microscopy, analytical centrifugation and X-ray scattering are comparable methods for the analysis of mixing ratios of colloids.</ce:para></ce:list-item></ce:list></ce:simple-para></ce:abstract-sec></ce:abstract><ce:abstract xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns="http://www.elsevier.com/xml/ja/dtd" id="abs0015" view="all" class="author"><ce:section-title id="sect0015">Abstract</ce:section-title><ce:abstract-sec id="abst0015" view="all"><ce:simple-para id="spar0045" view="all">For a known material, the size distribution of a nanoparticle colloid is a crucial parameter that defines its properties. However, measured size distributions are not easy to interpret as one has to consider weighting (e.g. by light absorption, scattering intensity, volume, surface, number) and the way size information was gained. The radius of a suspended nanoparticle can be given as e.g. sphere equivalent, hydrodynamic, Feret or radius of gyration. In this study, gold nanoparticles in water are synthesized by pulsed-laser ablation (LAL) and fragmentation (LFL) in liquids and characterized by various techniques (scanning transmission electron microscopy (STEM), small-angle X-ray scattering (SAXS), analytical disc centrifugation (ADC), dynamic light scattering (DLS) and UV–vis spectroscopy with Mie-Gans Theory) to study the comparability of different analytical techniques and determine the method that is preferable for a given task related to laser-generated nanoparticles. In particular, laser-generated colloids are known to be bimodal and/or polydisperse, but bimodality is sometimes not analytically resolved in literature. In addition, frequently reported small size shifts of the primary particle mode around 10 nm needs evaluation of its statistical significance related to the analytical method. Closely related to earlier studies on SAXS, different colloids in defined proportions are mixed and their size as a function of the nominal mixing ratio is analyzed. It is found that the derived particle size is independent of the nominal mixing ratio if the colloid size fractions do not overlap considerably. Conversely, the obtained size for colloids with overlapping size fractions strongly depends on the nominal mixing ratio since most methods cannot distinguish between such fractions. Overall, SAXS and ADC are very accurate methods for particle size analysis. Further, the ability of different methods to determine the nominal mixing ratio of sizes fractions is studied experimentally.</ce:simple-para></ce:abstract-sec></ce:abstract> 收起