Aggregation of urea in water: Dynamic light scattering analyses
| Autor: | M. Yousuf A. Mollah, Md. Abu Bin Hasan Susan, Noushaba Nusrat Mafy, M. Muhibur Rahman, Amiya Atahar |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Aqueous solution
Chemistry Dispersity Analytical chemistry 02 engineering and technology Anomalous behavior 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials chemistry.chemical_compound Correlation function (statistical mechanics) Dynamic light scattering Particle-size distribution Materials Chemistry Urea Physical and Theoretical Chemistry 0210 nano-technology Spectroscopy |
| Zdroj: | Journal of Molecular Liquids. 294:111612 |
| ISSN: | 0167-7322 |
| Popis: | The aggregation behavior of urea in water is multifaceted; the urea-urea, urea-water, and water-water interactions lead to noteworthy characteristics with changes in condition. The concentration- and temperature-dependent aggregation of urea was studied using dynamic light scattering (DLS). The particle size analysis and polydispersity between 1.0 and 12.0 M aqueous urea revealed pronounced aggregation trends beginning at or above 6.0 M. A reversal of the observed trend in intensity correlation function was noticed above 10.0 M. Temperature-dependent intensity correlation functions between 20 and 70 °C corroborated the finding. An anomalous behavior at 60 °C was observed, supported by the polydispersity of the systems, throughout all concentrations of urea studied. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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