Spontaneous Detachment of Colloids from Primary Energy Minima by Brownian Diffusion
| Author(s) | Wang, Zhan | |
| Author(s) | Jin, Yan | |
| Author(s) | Shen, Chongyang | |
| Author(s) | Li, Tiantian | |
| Author(s) | Huang, Yuanfang | |
| Author(s) | Li, Baoguo | |
| Ordered Author | Zhan Wang, Yan Jin, Chongyang Shen, Tiantian Li, Yuanfang Huang, Baoguo Li | |
| UD Author | Jin, Yan | en_US |
| Date Accessioned | 2016-05-12T14:31:22Z | |
| Date Available | 2016-05-12T14:31:22Z | |
| Copyright Date | Copyright © 2016 Wang et al. | en_US |
| Publication Date | 2016-01-19 | |
| Description | Publisher's PDF. | en_US |
| Abstract | The Derjaguin-Landau-Verwey-Overbeek (DLVO) interaction energy profile has been frequently used to interpret the mechanisms controlling colloid attachment/detachment and aggregation/disaggregation behavior. This study highlighted a type of energy profile that is characterized by a shallow primary energy well (i.e., comparable to the average kinetic energy of a colloid) at a small separation distance and a monotonic decrease of interaction energy with separation distance beyond the primary energy well. This energy profile is present due to variations of height, curvature, and density of discrete physical heterogeneities on collector surfaces. The energy profile indicates that colloids can be spontaneously detached from the shallow primary energy well by Brownian diffusion. The spontaneous detachment from primary minima was unambiguously confirmed by conducting laboratory column transport experiments involving flow interruptions for two model colloids (polystyrene latex microspheres) and engineered nanoparticles (fullerene C60 aggregates). Whereas the spontaneous detachment has been frequently attributed to attachment in secondary minima in the literature, our study indicates that the detached colloids could be initially attached at primary minima. Our study further suggests that the spontaneous disaggregation from primary minima is more significant than spontaneous detachment because the primary minimum depth between colloid themselves is lower than that between a colloid and a collector surface. | en_US |
| Department | University of Delaware. Department of Plant and Soil Sciences. | en_US |
| Citation | Wang Z, Jin Y, Shen C, Li T, Huang Y, Li B (2016) Spontaneous Detachment of Colloids from Primary Energy Minima by Brownian Diffusion. PLoS ONE 11(1): e0147368. doi:10.1371/journal. pone.0147368 | en_US |
| DOI | 10.1371/journal. pone.0147368 | en_US |
| ISSN | 1932-6203 | en_US |
| URL | http://udspace.udel.edu/handle/19716/17706 | |
| Language | en_US | en_US |
| Publisher | Public Library of Science (PLOS) | en_US |
| dc.rights | CC BY 4.0 | en_US |
| dc.source | PLOS One | en_US |
| dc.source.uri | http://journals.plos.org/plosone/ | en_US |
| Title | Spontaneous Detachment of Colloids from Primary Energy Minima by Brownian Diffusion | en_US |
| Type | Article | en_US |
Files
Original bundle
1 - 1 of 1
Loading...
- Name:
- Spontaneous Detachment of Colloids from Primary Energy Minima_1457978984T7897.PDF
- Size:
- 2.18 MB
- Format:
- Adobe Portable Document Format
- Description:
License bundle
1 - 1 of 1
No Thumbnail Available
- Name:
- license.txt
- Size:
- 2.22 KB
- Format:
- Item-specific license agreed upon to submission
- Description: