Detailed insights into the formation pathway of CdS and ZnS in solution: a multi-modalin situcharacterisation approach

Abstract

The high stability, high availability, and wide size-dependent bandgap energy of sulphidic semiconductor nanoparticles (NPs) render them promising for applications in optoelectronic devices and solar cells. However, the tunability of...

Trendbericht Festkörperchemie und Materialforschung 2024

“…1) Auch für Terraschke, Nyamen und Kol-leg:innen ist die In-situ-Röntgenbeugung am Synchrotron essenziell: Kombiniert mit Paarverteilungsfunktions-Analyse (pair distribution function, PDF) und Lumineszenzspektroskopie untersuchen sie, wie Präkursoren, Konzentration, Temperatur und Heizprogramm die Synthese von CdS-und ZnS-Nanopartikeln beeinflussen. 2) Bei der Reduktion von V 2 O 5 und WO 3 mit Wasserstoff verfolgen Kohlmann und Mitarbeitende über In-situ-Röntgenbeugung den Einfluss von Heiz-und Wasserstoffdurchfluss-Raten sowie entstandene Intermediate. 3) Bette und Lotsch nutzen In-situ-Röntgenbeugung, um die Interkalation von n-Butyl amin in Ethanol in H 3 Sb 3 P 2 O 14 zu analysieren.…”

α-Ag2S nanoparticles: low-temperature syntheses, crystallisation pathway, and first operando luminescence measurements for sodium-ion battery applications

“…23,24 SSPs are molecular structures that contain all the elements required to form inorganic products. 25,26 The most commonly used complex molecules are metal alkoxides, metal salts, 27 and binary organometallic complexes. 28 SSPs are advantageous because they already contain metal and sulphide sources, are easy to prepare, are stable over time, do not require counter ions as salt precursors, and produce high-purity products.…”

“…29 However, the precise control of size and structure-related physical properties of semiconductor NPs necessitates understanding their crystallisation process to control particle formation. 25,30 In situ measurements during the crystallisation of solid materials in solution provide essential information on the mechanisms of nucleation, structural evolution, and crystal growth. 31,32 This approach allows for better control of the influence of reaction parameters, such as temperature, reaction time, precursor chemical composition, and reactant concentration on product formation.…”

Real-time monitoring of CdTe quantum dots growth in aqueous solution

“…Due to quantum confinement effects imposed by their small size, tailoring the light emission of QDs depends on a strict control of their synthesis parameters as well as on the knowledge about their influence on every step of the QDs formation process 9 – 12 . Studying the synthesis mechanism under real-time reaction conditions is pivotal for precisely modulating the QD optical properties 13 . In order to monitor and control the evolution of particle size, ex situ absorption or photoluminescence (PL) emission measurements are often employed, by collecting aliquots of the solution during the reaction.…”