Designing artificial 2D crystals with site and size controlled quantum dots
| dc.citation.articleNumber | 9965 | |
| dc.citation.journalTitle | Scientific Reports | |
| dc.citation.volumeNumber | 7 | |
| dc.contributor.author | Xie, Xuejun | |
| dc.contributor.author | Kang, Jiahao | |
| dc.contributor.author | Cao, Wei | |
| dc.contributor.author | Chu, Jae Hwan | |
| dc.contributor.author | Gong, Yongji | |
| dc.contributor.author | Ajayan, Pulickel M. | |
| dc.contributor.author | Banerjee, Kaustav | |
| dc.date.accessioned | 2017-09-19T14:07:17Z | |
| dc.date.available | 2017-09-19T14:07:17Z | |
| dc.date.issued | 2017 | |
| dc.description.abstract | Ordered arrays of quantum dots in two-dimensional (2D) materials would make promising optical materials, but their assembly could prove challenging. Here we demonstrate a scalable, site and size controlled fabrication of quantum dots in monolayer molybdenum disulfide (MoS2), and quantum dot arrays with nanometer-scale spatial density by focused electron beam irradiation induced local 2H to 1T phase change in MoS2. By designing the quantum dots in a 2D superlattice, we show that new energy bands form where the new band gap can be controlled by the size and pitch of the quantum dots in the superlattice. The band gap can be tuned from 1.81 eV to 1.42 eV without loss of its photoluminescence performance, which provides new directions for fabricating lasers with designed wavelengths. Our work constitutes a photoresist-free, top-down method to create large-area quantum dot arrays with nanometer-scale spatial density that allow the quantum dots to interfere with each other and create artificial crystals. This technique opens up new pathways for fabricating light emitting devices with 2D materials at desired wavelengths. This demonstration can also enable the assembly of large scale quantum information systems and open up new avenues for the design of artificial 2D materials. | |
| dc.identifier.citation | Xie, Xuejun, Kang, Jiahao, Cao, Wei, et al.. "Designing artificial 2D crystals with site and size controlled quantum dots." <i>Scientific Reports,</i> 7, (2017) Springer Nature: https://doi.org/10.1038/s41598-017-08776-3. | |
| dc.identifier.digital | Designing_artificial_2D_crystals | |
| dc.identifier.doi | https://doi.org/10.1038/s41598-017-08776-3 | |
| dc.identifier.uri | https://hdl.handle.net/1911/97393 | |
| dc.language.iso | eng | |
| dc.publisher | Springer Nature | |
| dc.rights | This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. | |
| dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
| dc.title | Designing artificial 2D crystals with site and size controlled quantum dots | |
| dc.type | Journal article | |
| dc.type.dcmi | Text | |
| dc.type.publication | publisher version |
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