التفاصيل البيبلوغرافية
| العنوان: |
Hybrid Nanosystems Based on Metal-Containing Mesogenic CyanoAlkyl and Alkoxybiphenyls |
| المؤلفون: |
Tatyana I. Shabatina, Yurii N. Morosov |
| المصدر: |
Crystals, Vol 10, Iss 2, p 77 (2020) |
| بيانات النشر: |
MDPI AG, 2020. |
| سنة النشر: |
2020 |
| المجموعة: |
LCC:Crystallography |
| مصطلحات موضوعية: |
cyanoalkyl(alkoxy)biphenyls, metal–mesogenic nanosystems, antiferroelectric ordering, hybrid plasmonic nanostructures, silver nanoparticles, copper nanoparticles, controlled self-organization, optical properties, Crystallography, QD901-999 |
| الوصف: |
The paper reviews the results of the authors on the production of hybrid nanosystems based on liquid crystalline (LC) long-chain cyano(alkyl and alkoxy)biphenyls (5CB, 5OCB, and 8CCB) including nanosized metal species. The samples were obtained through the direct incorporation of metal (silver and copper) atoms and small clusters into mesogenic CB matrices via a low temperature co-condensation technique, and the formation of biligand metal complexes were revealed by FTIR and ESR-spectroscopy. The heating of the systems led to the controlled growth of metal clusters and nanosized metal particles of the definite size beginning from 1 up to 200 nanometers, and their highly-ordered assemblies stabilized in the solid and liquid crystalline phases. It is shown that supramolecular ordering in different LC phases of cyanobiphenyl matrices determines the size and shape of nanosized metal species that are formed in the systems under investigation, as well as the morphology of their aggregates. TEM and atomic force microscopy (AFM) data revealed the existence of orientationally-ordered nanostructures in the nematic phases of 5CB and 5OCB. The growth of quasi-fractal 2D-aggregates was shown for layer-structured smectic mesophase of 8CB. The UV−Visible spectra of hybrid metal−mesogenic nanosystems Ag-5CB and Cu-5CB that were incorporated into polymeric films revealed intensive plasmonic bands at 400−450 nm, similar to silver nanoparticles, and 540−650 nm, similar to copper nanoparticles. The increasing of the metal contents in the samples caused the growth of highly anisometric shaped metal rods, with the ratio of the length to the diameter being more than 10 and plasmonic bands at region of λ ≥ 650 nm. |
| نوع الوثيقة: |
article |
| وصف الملف: |
electronic resource |
| اللغة: |
English |
| تدمد: |
2073-4352 |
| Relation: |
https://www.mdpi.com/2073-4352/10/2/77; https://doaj.org/toc/2073-4352 |
| DOI: |
10.3390/cryst10020077 |
| URL الوصول: |
https://doaj.org/article/bfcc23c6b88a47c59f1c9a132ea313d5 |
| رقم الانضمام: |
edsdoj.bfcc23c6b88a47c59f1c9a132ea313d5 |
| قاعدة البيانات: |
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