Spontaneous Patterning of Binary Ligand Mixtures on CdSe Nanocrystals: from Random to Janus Packing
| العنوان: | Spontaneous Patterning of Binary Ligand Mixtures on CdSe Nanocrystals: from Random to Janus Packing |
|---|---|
| المؤلفون: | Orian Elimelech, Meirav Oded, Daniel Harries, Uri Banin |
| سنة النشر: | 2023 |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), General Engineering, General Physics and Astronomy, Soft Condensed Matter (cond-mat.soft), FOS: Physical sciences, General Materials Science, Condensed Matter - Soft Condensed Matter |
| الوصف: | Binary compositions of surface ligands are known to improve the colloidal stability and fluorescence quantum yield of nanocrystals (NCs), due to ligand-ligand interactions and surface organization. Herein, we follow the thermodynamics of a ligand exchange reaction of CdSe NCs with alkylthiols mixtures. The effects of ligand polarity and length difference on ligand packing were investigated using isothermal titration calorimetry (ITC). The thermodynamic signature of the formation of mixed ligand shells was observed. Correlating the experimental results with thermodynamic mixing models has allowed us to calculate the inter-chain interactions and infer the final ligand shell configuration. Our findings demonstrate that the small dimensions of the NCs and the subsequent increased interfacial region between dissimilar ligands, in contrast to macroscopic surfaces, allow the formation of a myriad of clustering patterns, controlled by the inter-ligand interactions. This work provides a fundamental understanding of the parameters determining the ligand shell structure and should help guide smart surface design toward NC-based applications. 28 pages, 4 figures; combines with SI file 24 pages, 14 figures, 9 tables |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7d417632f1e05cc55165276f0409a613 http://arxiv.org/abs/2306.08372 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....7d417632f1e05cc55165276f0409a613 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |