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Zhang W, Ma Y, Santos-López IA, Lownsbury JM, Yu H, Liu WG, Truhlar DG, Campbell CT, Vilches OE. Energetics of van der Waals Adsorption on the Metal–Organic Framework NU-1000 with Zr6-oxo, Hydroxo, and Aqua Nodes. J Am Chem Soc 2017; 140:328-338. [DOI: 10.1021/jacs.7b10360] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wei Zhang
- Department
of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Yuanyuan Ma
- Department
of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Iván A. Santos-López
- Department
of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - James M. Lownsbury
- Department
of Chemical Engineering, University of Washington, Seattle, Washington 98195-1750, United States
| | - Haoyu Yu
- Department
of Chemistry, Chemical Theory Center, and Minnesota Supercomputing
Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Wei-Guang Liu
- Department
of Chemistry, Chemical Theory Center, and Minnesota Supercomputing
Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Donald G. Truhlar
- Department
of Chemistry, Chemical Theory Center, and Minnesota Supercomputing
Institute, University of Minnesota, Minneapolis, Minnesota 55455-0431, United States
| | - Charles T. Campbell
- Department
of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
- Department
of Chemical Engineering, University of Washington, Seattle, Washington 98195-1750, United States
| | - Oscar E. Vilches
- Department
of Physics, University of Washington, Seattle, Washington 98195-1560, United States
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Fang J, Zhu DM. Resonant frequency and dissipation factor isotherms of adsorbed molecules on solid-liquid interfaces probed by quartz crystal microbalance. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2008; 78:031604. [PMID: 18851046 DOI: 10.1103/physreve.78.031604] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2008] [Indexed: 05/26/2023]
Abstract
Changes in the resonant frequency Deltaf and the dissipation factor DeltaD of a quartz crystal microbalance due to adsorption of molecules onto the electrode surface in solutions at different concentrations have been numerically analyzed. It has been found that the contribution from the solution due to the variation of the concentration can mask the overall behaviors of the Deltaf and DeltaD isotherms. However, if the solution is sufficiently dilute or the contribution of the solution can be characterized accurately, the corrected Deltaf and DeltaD , as a function of the solution concentration, will reveal characteristic features of the adsorption processes for the adsorbed films. Specifically, steplike behaviors will be displayed in Deltaf isotherms, which correspond to layer formation and layer-by-layer growth of the films, but the onsets of the steps usually do not coincide with the layer completion. Oscillatory behaviors will be revealed in DeltaD isotherms if the adsorbed molecular layer is soft at low concentration and becomes rigid near layer completion.
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Affiliation(s)
- Jiajie Fang
- Department of Modern Physics, University of Science and Technology of China, Hefei, China 230027
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