Measuring the ultrafast spectral diffusion dynamics of colloidal CdSe nanomaterials
We use ultrafast coherent two-dimensional electronic spectroscopy (2DES) to study the ultrafast spectral diffusion dynamics of colloidal CdSe quantum dots (QDs) and CdSe nanoplatelets (NPLs). The Center Line Slope (CLS) and Nodal Line Slope (NLS) techniques were employed to analyse the 2DES spectra....
| Main Authors: | , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2020
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| Online Access: | https://hdl.handle.net/10356/144911 |
| _version_ | 1811693826576744448 |
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| author | Do, Thanh Nhut Zhang, Cheng Ong, Xuanwei Lian, Jie Chan, Yinthai Tan, Howe-Siang |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Do, Thanh Nhut Zhang, Cheng Ong, Xuanwei Lian, Jie Chan, Yinthai Tan, Howe-Siang |
| author_sort | Do, Thanh Nhut |
| collection | NTU |
| description | We use ultrafast coherent two-dimensional electronic spectroscopy (2DES) to study the ultrafast spectral diffusion dynamics of colloidal CdSe quantum dots (QDs) and CdSe nanoplatelets (NPLs). The Center Line Slope (CLS) and Nodal Line Slope (NLS) techniques were employed to analyse the 2DES spectra. We show that no spectral diffusion dynamics occurs for the CdSe QDs. On the other hand, spectral diffusion was observed in the CdSe 5 mono-layers NPLs heavy-hole transition. The normalized Frequency Fluctuation Correlation Function (FFCF) of the CdSe NPLs heavy-hole transition was measured to have a major fast decay component at 140 fs. |
| first_indexed | 2024-10-01T06:57:51Z |
| format | Journal Article |
| id | ntu-10356/144911 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:57:51Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-10356/1449112023-02-28T19:48:32Z Measuring the ultrafast spectral diffusion dynamics of colloidal CdSe nanomaterials Do, Thanh Nhut Zhang, Cheng Ong, Xuanwei Lian, Jie Chan, Yinthai Tan, Howe-Siang School of Physical and Mathematical Sciences Science::Chemistry Nanostructure Spectroscopy We use ultrafast coherent two-dimensional electronic spectroscopy (2DES) to study the ultrafast spectral diffusion dynamics of colloidal CdSe quantum dots (QDs) and CdSe nanoplatelets (NPLs). The Center Line Slope (CLS) and Nodal Line Slope (NLS) techniques were employed to analyse the 2DES spectra. We show that no spectral diffusion dynamics occurs for the CdSe QDs. On the other hand, spectral diffusion was observed in the CdSe 5 mono-layers NPLs heavy-hole transition. The normalized Frequency Fluctuation Correlation Function (FFCF) of the CdSe NPLs heavy-hole transition was measured to have a major fast decay component at 140 fs. Ministry of Education (MOE) Accepted version This work is supported by a grant from the Singapore Ministry of Education Tier 2 Academic Research Fund (MOE2015-T2-1-039). 2020-12-03T02:48:18Z 2020-12-03T02:48:18Z 2019 Journal Article Do, T. N., Zhang, C., Ong, X., Lian, J., Chan, Y., & Tan, H.-S. (2019). Measuring the Ultrafast Spectral Diffusion Dynamics of Colloidal CdSe Nanomaterials. MRS Advances, 4(1), 1–7. doi:10.1557/adv.2019.38 2059-8521 https://hdl.handle.net/10356/144911 10.1557/adv.2019.38 1 4 1 7 en MRS Advances © 2019 Materials Research Society. All rights reserved. This paper was published in MRS Advances and is made available with permission of Materials Research Society. application/pdf |
| spellingShingle | Science::Chemistry Nanostructure Spectroscopy Do, Thanh Nhut Zhang, Cheng Ong, Xuanwei Lian, Jie Chan, Yinthai Tan, Howe-Siang Measuring the ultrafast spectral diffusion dynamics of colloidal CdSe nanomaterials |
| title | Measuring the ultrafast spectral diffusion dynamics of colloidal CdSe nanomaterials |
| title_full | Measuring the ultrafast spectral diffusion dynamics of colloidal CdSe nanomaterials |
| title_fullStr | Measuring the ultrafast spectral diffusion dynamics of colloidal CdSe nanomaterials |
| title_full_unstemmed | Measuring the ultrafast spectral diffusion dynamics of colloidal CdSe nanomaterials |
| title_short | Measuring the ultrafast spectral diffusion dynamics of colloidal CdSe nanomaterials |
| title_sort | measuring the ultrafast spectral diffusion dynamics of colloidal cdse nanomaterials |
| topic | Science::Chemistry Nanostructure Spectroscopy |
| url | https://hdl.handle.net/10356/144911 |
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