Millstone Exfoliation: a True Shear Exfoliation for Large-Size Few-Layer Graphene Oxide
Abstract A millstone (MS) was introduced in the production of large-size few-layer-graphene oxide (FLGO) via true shear exfoliation in order to minimize fragmentation. The MS was constructed with two glass plates, where the top plate was designed to rotate against the stationary bottom plate, thereb...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2018-06-01
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| Series: | Nanoscale Research Letters |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s11671-018-2598-y |
| _version_ | 1797759827060981760 |
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| author | Heng-Ju Yoon Jae Young Lee Tae-Ho Yoon |
| author_facet | Heng-Ju Yoon Jae Young Lee Tae-Ho Yoon |
| author_sort | Heng-Ju Yoon |
| collection | DOAJ |
| description | Abstract A millstone (MS) was introduced in the production of large-size few-layer-graphene oxide (FLGO) via true shear exfoliation in order to minimize fragmentation. The MS was constructed with two glass plates, where the top plate was designed to rotate against the stationary bottom plate, thereby generating true shear force. Mildly oxidized graphite (MOG) was used for MS exfoliation in order to obtain both good property and high yield. The rpm of rotation (10, 20, 30, 40, and 50), solution concentration (0.5, 1, and 2 mg/ml), and number of exfoliation (1, 2, and 3) were optimized by measuring the UV-vis absorption, and the effect of oxidation time (30, 60, and 90 min) was studied under the given optimum conditions. Next, the FLGO was isolated by centrifugation and characterized by TEM and AFM. The FLGO obtained was as large as ~ 10 μm in size, which was slightly smaller than the pristine graphite, suggesting a possibility of slight fragmentation. But it was still much larger than the FLGO obtained via sonication (< 1 μm), demonstrating successful MS exfoliation. |
| first_indexed | 2024-03-12T18:50:03Z |
| format | Article |
| id | doaj.art-db910218c1af4e419843a63d3eccc1de |
| institution | Directory Open Access Journal |
| issn | 1931-7573 1556-276X |
| language | English |
| last_indexed | 2024-03-12T18:50:03Z |
| publishDate | 2018-06-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Nanoscale Research Letters |
| spelling | doaj.art-db910218c1af4e419843a63d3eccc1de2023-08-02T07:18:06ZengSpringerOpenNanoscale Research Letters1931-75731556-276X2018-06-011311710.1186/s11671-018-2598-yMillstone Exfoliation: a True Shear Exfoliation for Large-Size Few-Layer Graphene OxideHeng-Ju Yoon0Jae Young Lee1Tae-Ho Yoon2School of Materials Science and Engineering, Gwangju Institute of Science and Engineering (GIST)School of Materials Science and Engineering, Gwangju Institute of Science and Engineering (GIST)School of Materials Science and Engineering, Gwangju Institute of Science and Engineering (GIST)Abstract A millstone (MS) was introduced in the production of large-size few-layer-graphene oxide (FLGO) via true shear exfoliation in order to minimize fragmentation. The MS was constructed with two glass plates, where the top plate was designed to rotate against the stationary bottom plate, thereby generating true shear force. Mildly oxidized graphite (MOG) was used for MS exfoliation in order to obtain both good property and high yield. The rpm of rotation (10, 20, 30, 40, and 50), solution concentration (0.5, 1, and 2 mg/ml), and number of exfoliation (1, 2, and 3) were optimized by measuring the UV-vis absorption, and the effect of oxidation time (30, 60, and 90 min) was studied under the given optimum conditions. Next, the FLGO was isolated by centrifugation and characterized by TEM and AFM. The FLGO obtained was as large as ~ 10 μm in size, which was slightly smaller than the pristine graphite, suggesting a possibility of slight fragmentation. But it was still much larger than the FLGO obtained via sonication (< 1 μm), demonstrating successful MS exfoliation.http://link.springer.com/article/10.1186/s11671-018-2598-yGraphene oxideMillstone exfoliationMild oxidation |
| spellingShingle | Heng-Ju Yoon Jae Young Lee Tae-Ho Yoon Millstone Exfoliation: a True Shear Exfoliation for Large-Size Few-Layer Graphene Oxide Nanoscale Research Letters Graphene oxide Millstone exfoliation Mild oxidation |
| title | Millstone Exfoliation: a True Shear Exfoliation for Large-Size Few-Layer Graphene Oxide |
| title_full | Millstone Exfoliation: a True Shear Exfoliation for Large-Size Few-Layer Graphene Oxide |
| title_fullStr | Millstone Exfoliation: a True Shear Exfoliation for Large-Size Few-Layer Graphene Oxide |
| title_full_unstemmed | Millstone Exfoliation: a True Shear Exfoliation for Large-Size Few-Layer Graphene Oxide |
| title_short | Millstone Exfoliation: a True Shear Exfoliation for Large-Size Few-Layer Graphene Oxide |
| title_sort | millstone exfoliation a true shear exfoliation for large size few layer graphene oxide |
| topic | Graphene oxide Millstone exfoliation Mild oxidation |
| url | http://link.springer.com/article/10.1186/s11671-018-2598-y |
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