3D Photonic Crystals: Synthesis and Drying in Supercritical Ethanol

Dyshin, A. A.; Бондаренко, Г. В.; Киселев, М. Г.

doi:10.1134/s003602362203007x

Cited by 3 publications

(2 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A different terminology for such nanosized structures propose the term "colloidal superstructures" [2]. These objects also include the so-called "photonic crystals", which are formed by amorphous particles of metal oxides or polymers with sizes of tens and hundreds nanometers [3]. One example of such colloidal crystals formed by noble metals would be Au crystals with sizes of several microns consisting of Au nanoparticles about 8 nm in size [4].…”

Section: Introductionmentioning

confidence: 99%

The effect of Ag(0) colloidal crystals and nanoribbons formation as a result of the redox reaction between Ce(III) and Ag(I) cations occurring on the surface of an aqueous solution of their salts mixture

Tolstoy,

Shilovskikh,

Gulina

2024

Nanosystems: Phys. Chem. Math.

View full text Add to dashboard Cite

The proposed study shows for the first time that gaseous ammonia treatment of AgNO 3 and Ce(NO 3 ) 3 salts mixture aqueous solution surface gives rise to formation of a composite layer consisting of Ag(0) faceted colloidal crystals and nanoribbons, as well as CeO 2 nanocrystals. A study of such a composite carried out by FESEM, XRD, EDX, TEM, STEM and HRTEM methods has shown that the nanoribbons are about 50-150 nm wide and up to 2-3 µm long, and that there are 2-3 nm CeO 2 nanocrystals on the surface thereof. Colloidal crystals of about several micrometers consist of separate, almost identical silver nanocrystals about 20 nm in size. The obtained results provided a basis for construction of schemes of chemical reactions taking place during the synthesis, and gave grounds for recommendations on practical application of the obtained compounds. KEYWORDS silver, colloidal crystals, nanoribbons, CeO 2 , composite, interface synthesis.

show abstract

Section: Introductionmentioning

confidence: 99%

The effect of Ag(0) colloidal crystals and nanoribbons formation as a result of the redox reaction between Ce(III) and Ag(I) cations occurring on the surface of an aqueous solution of their salts mixture

Tolstoy,

Shilovskikh,

Gulina

2024

Nanosystems: Phys. Chem. Math.

View full text Add to dashboard Cite

show abstract

“…The sol-gel approach provides a high level of chemical flexibility, due to the diversity of host matrices and the variability of synthetic parameters (solvent type, pH, various surfactants and chemical modifiers, aging techniques, post-synthesis treatment, etc. ), which enables the synthesis of a wide range of materials with a precisely tunable structure, porosity, and other properties [ 27 , 28 , 29 , 30 , 31 , 32 ]. Comprehensive reviews of sol-gel-derived magnetic materials (but not specifically on SIMs or SMMs) have been published elsewhere [ 33 , 34 ].…”

Section: Introductionmentioning

confidence: 99%

Aerogel-Based Single-Ion Magnets: A Case Study of a Cobalt(II) Complex Immobilized in Silica

et al. 2023

View full text Add to dashboard Cite

The chemical immobilization of cobalt(II) ions in a silica aerogel matrix enabled the synthesis of the first representative example of aerogel-based single-ion magnets. For the synthesis of the lyogels, methyl-trimethoxysilane and N-3-(trimethoxysilyl)propyl ethylenediamine were co-hydrolyzed, then the ethylenediamine groups that were immobilized on the silica matrix enabled the subsequent binding of cobalt(II) ions. Lyogels with various amounts of ethylenediamine moieties (0.1–15 mol %) were soaked in isopropanol solutions of cobalt(II) nitrate and further supercritically dried in carbon dioxide to obtain aerogels with a specific surface area of 210–596 m2·g−1, an apparent density of 0.403–0.740 cm3·g−1 and a porosity of 60–78%. The actual cobalt content in the aerogels was 0.01–1.50 mmol per 1 g of SiO2, which could easily be tuned by the concentration of ethylenediamine moieties in the silica matrix. The introduction of cobalt(II) ions into the ethylenediamine-modified silica aerogel promoted the stability of the diamine moieties at the supercritical drying stage. The molecular prototype of the immobilized cobalt(II) complex, bearing one ethylenediamine ligand [Co(en)(MeCN)(NO3)2], was synthesized and structurally characterized. Using magnetometry in the DC mode, it was shown that cobalt(II)-modified silica aerogels exhibited slow magnetic relaxation in a nonzero field. A decrease in cobalt(II) concentration in aerogels from 1.5 mmol to 0.14 mmol per 1 g of SiO2 resulted in a weakening of inter-ion interactions; the magnetization reversal energy barrier likewise increased from 4 to 18 K.

show abstract

Design and synthesis of graphitic carbon nitride photonic crystals for efficient photocatalytic removal of U(VI)

Zhang,

Chen,

Yang

et al. 2024

Journal of Environmental Chemical Engineering

View full text Add to dashboard Cite

3D Photonic Crystals: Synthesis and Drying in Supercritical Ethanol

Cited by 3 publications

References 35 publications

The effect of Ag(0) colloidal crystals and nanoribbons formation as a result of the redox reaction between Ce(III) and Ag(I) cations occurring on the surface of an aqueous solution of their salts mixture

The effect of Ag(0) colloidal crystals and nanoribbons formation as a result of the redox reaction between Ce(III) and Ag(I) cations occurring on the surface of an aqueous solution of their salts mixture

Aerogel-Based Single-Ion Magnets: A Case Study of a Cobalt(II) Complex Immobilized in Silica

Design and synthesis of graphitic carbon nitride photonic crystals for efficient photocatalytic removal of U(VI)

Contact Info

Product

Resources

About