The depuration fate of the mixtures of CdS/ZnS quantum dots (QDs) with different surface coatings on mangrove and wheat root epidermis: results from a novel method

Abstract

Background: The depuration fate of mixtures of metal-based quantum dots (QDs) in root epidermis is an important factor that determined their follow-up transportation and transformation processes in plant. However, the related mechanisms are poorly understood due to the lack of appropriate quantitative methods. Results:In our study, a novel method for in situ determination of mixtures of CdS/ZnS QDs with different surface coatings located on root epidermis was developed using an excitation-emission matrix combined with multi-way parallel factor analysis (PARAFAC) and n-way partial least squares (n-PLS). Then, the fates of CdS/ZnS QDs on mangrove and wheat root epidermis were investigated using the established method. During the rapid dissipation stage, intracellular and intercellular degradation of metal ions instead of transportation and rhizophytic bacteria degradation was the predominant reasons for the reduction in the CdS/ZnS QDs mixtures. However, due to vertical migration of CdS/ZnS QDs in the slow depuration stage, negative linear relationships were observed between the K s values of oleic acid-CdS/ZnS QDs and the polarity index of the root epidermis (p < 0.05), which further indicated a difference between the single and mixture QDs. Conclusions:To our knowledge, this study provided a new approach to investigate the fate of QDs located on root epidermis and revealed the related mechanisms. which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Порівняння ефектів колоїдного розчину квантових точок на основі телуриду кадмію та іонів кадмію на проліферативну активність кореневих меристем Allium cepa L.

“…Р. Лі зі співавт. [13] зазначає, що результати дослідження транспортуван ня та перерозподілу КТ у клітинах коренів Kandelia obovata (S., L.) Yong. та Triticum aestivum L. підтверджують домінантну роль позаклітинного (апопластного) руху CdS/ZnS КТ у забезпеченні радіального транспорту наночастинок.…”

Applications of Fluorescent quantum dots for medical and environmental science applications (NanoTrust-Dossier No 059en - Jan 2023)

“…soil, water, plants), it is possible to study the general environ mental behaviour and fate of ENPs in the environ ment in more detail. 5,6,7,8,9 In medicine and for bi ological applications, QDs must be waterloving (hydrophilic), biocompatible, and functionalisable with bio molecules and/or drugs; however, the de velopment of QDs without heavy metals and the development of efficient strategies for surface functionalisation (e.g. with specific antibodies for cancer diagnostics) remains a major challenge.…”

Fluoreszierende Quantenpunkte für medizinische und umwelt-wissenschaftlichen Anwendungen (NanoTrust-Dossier Nr. 059 - August 2022)

“…Aufgrund ihrer Mobilität und Interaktion mit komplexen Medien (Boden, Wasser, Pflanzen) kann das allgemeine Umweltverhal ten und verbleib von ENPs genauer untersucht werden. 5,6,7,8,9 In der Medizin und für biologische Anwendungen müssen QDs wasserliebend (hydrophil), biokompatibel und mit Biomolekülen und/ oder Medikamenten funktionalisierbar sein, wobei die Entwicklung von schwermetallfreien QDs sowie effizienten Strategien der Oberflächenfunk tionalisierung (z. B. mit bestimmten Antikörpern für die Krebsdiagnostik) eine große Herausforderung bleiben.…”