Observation of the interactions of silver nanoparticles (AgNPs) mediated by acid in the aquatic matrices using in-situ liquid cell transmission electron microscopy
The properties of the solution matrix play a prominent role in determining the interactions between the silver nanoparticles (AgNPs) when they are present in the aquatic environment. Here, using in situ liquid cell transmission electron microscopy (LCTEM), we show that the interaction of AgNPs is pr...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2021
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| Online Access: | https://hdl.handle.net/10356/152049 |
| _version_ | 1824455838318723072 |
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| author | Fernando, Ishara Tay, Yee Yan Karunasekera, Hasith Zhou, Yan |
| author2 | Interdisciplinary Graduate School (IGS) |
| author_facet | Interdisciplinary Graduate School (IGS) Fernando, Ishara Tay, Yee Yan Karunasekera, Hasith Zhou, Yan |
| author_sort | Fernando, Ishara |
| collection | NTU |
| description | The properties of the solution matrix play a prominent role in determining the interactions between the silver nanoparticles (AgNPs) when they are present in the aquatic environment. Here, using in situ liquid cell transmission electron microscopy (LCTEM), we show that the interaction of AgNPs is predominantly affected by the solution pH. Reducing the pH in the solution will accelerate the aggregation of AgNPs due to the alteration of the charge cloud around the NPs. Aggregates formed in this scenario were non spherical and irregular shaped and were stable under the electron beam irradiation. Individual AgNPs and smaller aggregates moved randomly and approached the larger aggregates before the aggregation process came to an end. We found that during the aggregation process, the mode of jump to contact and the pairwise approach of aggregation differed according to the composition of the solution. Observations made using the LCTEM were further explained using empirical formulae. Our observation on the pH induced interactions provides important insights on predicting the behavior of AgNPs released through many anthropogenic activities in the environment. |
| first_indexed | 2025-02-19T03:44:34Z |
| format | Journal Article |
| id | ntu-10356/152049 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:44:34Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | ntu-10356/1520492021-08-21T20:11:16Z Observation of the interactions of silver nanoparticles (AgNPs) mediated by acid in the aquatic matrices using in-situ liquid cell transmission electron microscopy Fernando, Ishara Tay, Yee Yan Karunasekera, Hasith Zhou, Yan Interdisciplinary Graduate School (IGS) School of Materials Science and Engineering School of Electrical and Electronic Engineering School of Civil and Environmental Engineering Facility for Analysis, Characterization, Testing and Simulation Nanyang Environment and Water Research Institute Advanced Environmental Biotechnology Centre (AEBC) Engineering::Environmental engineering Liquid Cell Transmission Electron Microscopy Aggregation The properties of the solution matrix play a prominent role in determining the interactions between the silver nanoparticles (AgNPs) when they are present in the aquatic environment. Here, using in situ liquid cell transmission electron microscopy (LCTEM), we show that the interaction of AgNPs is predominantly affected by the solution pH. Reducing the pH in the solution will accelerate the aggregation of AgNPs due to the alteration of the charge cloud around the NPs. Aggregates formed in this scenario were non spherical and irregular shaped and were stable under the electron beam irradiation. Individual AgNPs and smaller aggregates moved randomly and approached the larger aggregates before the aggregation process came to an end. We found that during the aggregation process, the mode of jump to contact and the pairwise approach of aggregation differed according to the composition of the solution. Observations made using the LCTEM were further explained using empirical formulae. Our observation on the pH induced interactions provides important insights on predicting the behavior of AgNPs released through many anthropogenic activities in the environment. Accepted version 2021-08-03T07:07:48Z 2021-08-03T07:07:48Z 2020 Journal Article Fernando, I., Tay, Y. Y., Karunasekera, H. & Zhou, Y. (2020). Observation of the interactions of silver nanoparticles (AgNPs) mediated by acid in the aquatic matrices using in-situ liquid cell transmission electron microscopy. Analytica Chimica Acta, 1104, 47-52. https://dx.doi.org/10.1016/j.aca.2019.12.072 0003-2670 https://hdl.handle.net/10356/152049 10.1016/j.aca.2019.12.072 32106956 2-s2.0-85077356992 1104 47 52 en Analytica Chimica Acta © 2019 Elsevier B.V. All rights reserved. This paper was published in Analytica Chimica Acta and is made available with permission of Elsevier B.V. application/pdf |
| spellingShingle | Engineering::Environmental engineering Liquid Cell Transmission Electron Microscopy Aggregation Fernando, Ishara Tay, Yee Yan Karunasekera, Hasith Zhou, Yan Observation of the interactions of silver nanoparticles (AgNPs) mediated by acid in the aquatic matrices using in-situ liquid cell transmission electron microscopy |
| title | Observation of the interactions of silver nanoparticles (AgNPs) mediated by acid in the aquatic matrices using in-situ liquid cell transmission electron microscopy |
| title_full | Observation of the interactions of silver nanoparticles (AgNPs) mediated by acid in the aquatic matrices using in-situ liquid cell transmission electron microscopy |
| title_fullStr | Observation of the interactions of silver nanoparticles (AgNPs) mediated by acid in the aquatic matrices using in-situ liquid cell transmission electron microscopy |
| title_full_unstemmed | Observation of the interactions of silver nanoparticles (AgNPs) mediated by acid in the aquatic matrices using in-situ liquid cell transmission electron microscopy |
| title_short | Observation of the interactions of silver nanoparticles (AgNPs) mediated by acid in the aquatic matrices using in-situ liquid cell transmission electron microscopy |
| title_sort | observation of the interactions of silver nanoparticles agnps mediated by acid in the aquatic matrices using in situ liquid cell transmission electron microscopy |
| topic | Engineering::Environmental engineering Liquid Cell Transmission Electron Microscopy Aggregation |
| url | https://hdl.handle.net/10356/152049 |
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