The thinnest light disk: rewritable data storage and encryption on WS₂ monolayers
The thinnest light disk is demonstrated at the atomic level by developing an erasable method to directly write encrypted information onto WS₂ monolayers. The write-in is realized by precise control of photoluminescence emission by means of ozone functionalization and scanning focused laser beam. The...
| Main Authors: | , , , , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/159661 |
| _version_ | 1824456331658002432 |
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| author | Zhao, Weiwei Cai, Shuang Wei, Xin Zheng, Ting Xu, Xin Zafar, Amina Liu, Hongwei Yu, Ting Lu, Junpeng Chen, Yunfei Ni, Zhenhua |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Zhao, Weiwei Cai, Shuang Wei, Xin Zheng, Ting Xu, Xin Zafar, Amina Liu, Hongwei Yu, Ting Lu, Junpeng Chen, Yunfei Ni, Zhenhua |
| author_sort | Zhao, Weiwei |
| collection | NTU |
| description | The thinnest light disk is demonstrated at the atomic level by developing an erasable method to directly write encrypted information onto WS₂ monolayers. The write-in is realized by precise control of photoluminescence emission by means of ozone functionalization and scanning focused laser beam. The visual decryption and reading-out of information are enabled by fluorescence contrast. The high encryption level is ensured by the threshold power upon which the data deletion will be triggered. Owing to the high spatial resolution and power sensitivity, the storage capacity within <1 nm thickness can be up to ≈62.5 MB cm⁻², and the writing speed can reach ≈6.25 MB s⁻¹. Density functional theory calculations suggest that the disk formatting is realized by ozone molecule adsorption induced localized unoccupied states, while the read-in relies on the passivation of defects via substitution of the sulfur vacancies with oxygen atoms. The results of this study promote data storage and encryption on the atomic scale. |
| first_indexed | 2025-02-19T03:52:24Z |
| format | Journal Article |
| id | ntu-10356/159661 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:52:24Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1596612022-06-29T06:25:20Z The thinnest light disk: rewritable data storage and encryption on WS₂ monolayers Zhao, Weiwei Cai, Shuang Wei, Xin Zheng, Ting Xu, Xin Zafar, Amina Liu, Hongwei Yu, Ting Lu, Junpeng Chen, Yunfei Ni, Zhenhua School of Physical and Mathematical Sciences Science::Physics Data Encryption Light Disks The thinnest light disk is demonstrated at the atomic level by developing an erasable method to directly write encrypted information onto WS₂ monolayers. The write-in is realized by precise control of photoluminescence emission by means of ozone functionalization and scanning focused laser beam. The visual decryption and reading-out of information are enabled by fluorescence contrast. The high encryption level is ensured by the threshold power upon which the data deletion will be triggered. Owing to the high spatial resolution and power sensitivity, the storage capacity within <1 nm thickness can be up to ≈62.5 MB cm⁻², and the writing speed can reach ≈6.25 MB s⁻¹. Density functional theory calculations suggest that the disk formatting is realized by ozone molecule adsorption induced localized unoccupied states, while the read-in relies on the passivation of defects via substitution of the sulfur vacancies with oxygen atoms. The results of this study promote data storage and encryption on the atomic scale. This work was supported by the National Key Research and Development Program of China (2017YFA0205700 and 2019YFA0308000), Fundamental Research Funds for the Central Universities (2242021k10009), and NSFC (91963130, 61774034, 61705106, and 61927808). 2022-06-29T06:25:20Z 2022-06-29T06:25:20Z 2021 Journal Article Zhao, W., Cai, S., Wei, X., Zheng, T., Xu, X., Zafar, A., Liu, H., Yu, T., Lu, J., Chen, Y. & Ni, Z. (2021). The thinnest light disk: rewritable data storage and encryption on WS₂ monolayers. Advanced Functional Materials, 31(36), 2103140-. https://dx.doi.org/10.1002/adfm.202103140 1616-301X https://hdl.handle.net/10356/159661 10.1002/adfm.202103140 2-s2.0-85108431207 36 31 2103140 en Advanced Functional Materials © 2021 Wiley-VCH GmbH. All rights reserved. |
| spellingShingle | Science::Physics Data Encryption Light Disks Zhao, Weiwei Cai, Shuang Wei, Xin Zheng, Ting Xu, Xin Zafar, Amina Liu, Hongwei Yu, Ting Lu, Junpeng Chen, Yunfei Ni, Zhenhua The thinnest light disk: rewritable data storage and encryption on WS₂ monolayers |
| title | The thinnest light disk: rewritable data storage and encryption on WS₂ monolayers |
| title_full | The thinnest light disk: rewritable data storage and encryption on WS₂ monolayers |
| title_fullStr | The thinnest light disk: rewritable data storage and encryption on WS₂ monolayers |
| title_full_unstemmed | The thinnest light disk: rewritable data storage and encryption on WS₂ monolayers |
| title_short | The thinnest light disk: rewritable data storage and encryption on WS₂ monolayers |
| title_sort | thinnest light disk rewritable data storage and encryption on ws₂ monolayers |
| topic | Science::Physics Data Encryption Light Disks |
| url | https://hdl.handle.net/10356/159661 |
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