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Sheyfer D, Zhang Q, Lal J, Loeffler T, Dufresne EM, Sandy AR, Narayanan S, Sankaranarayanan SKRS, Szczygiel R, Maj P, Soderholm L, Antonio MR, Stephenson GB. Nanoscale Critical Phenomena in a Complex Fluid Studied by X-Ray Photon Correlation Spectroscopy. PHYSICAL REVIEW LETTERS 2020; 125:125504. [PMID: 33016761 DOI: 10.1103/physrevlett.125.125504] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2020] [Revised: 05/27/2020] [Accepted: 07/14/2020] [Indexed: 06/11/2023]
Abstract
The advent of high-speed x-ray photon correlation spectroscopy now allows the study of critical phenomena in fluids to much smaller length scales and over a wider range of temperatures than is possible with dynamic light scattering. We present an x-ray photon correlation spectroscopy study of critical fluctuation dynamics in a complex fluid typical of those used in liquid-liquid extraction (LLE) of ions, dodecane-DMDBTDMA with extracted aqueous Ce(NO_{3})_{3}. We observe good agreement with both static and dynamic scaling without the need for significant noncritical background corrections. Critical exponents agree with 3D Ising values, and the fluctuation dynamics are described by simple exponential relaxation. The form of the dynamic master curve deviates somewhat from the Kawasaki result, with a more abrupt transition between the critical and noncritical asymptotic behavior. The concepts of critical phenomena thus provide a quantitative framework for understanding the structure and dynamics of LLE systems and a path forward to new LLE processes.
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Affiliation(s)
- D Sheyfer
- Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - Qingteng Zhang
- X-Ray Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - J Lal
- Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
- Department of Physics, Northern Illinois University, DeKalb, Illinois 60115, USA
| | - T Loeffler
- Nanoscale Science and Technology Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - E M Dufresne
- X-Ray Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - A R Sandy
- X-Ray Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - S Narayanan
- X-Ray Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - S K R S Sankaranarayanan
- Nanoscale Science and Technology Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
- Department of Mechanical and Industrial Engineering, University of Illinois, Chicago, Illinois 60607, USA
| | - R Szczygiel
- AGH University of Science and Technology, Krakow 30-059, Poland
| | - P Maj
- AGH University of Science and Technology, Krakow 30-059, Poland
| | - L Soderholm
- Chemical Science and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - M R Antonio
- Chemical Science and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - G B Stephenson
- Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
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Bhattacharjee JK, Iwanowski I, Kaatze U. Bulk viscosity universality and scaling function near the binary liquid consolute point. J Chem Phys 2009; 131:174502. [DOI: 10.1063/1.3258279] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Iwanowski I, Mirzaev SZ, Orzechowski K, Kaatze U. Critical dynamics at the col point of the ternary system methanol-n-hexane-cyclohexane. J Mol Liq 2009. [DOI: 10.1016/j.molliq.2009.01.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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