التفاصيل البيبلوغرافية
| العنوان: |
SERS Selective Enhancement on Monolayer MoS 2 Enabled by a Pressure-Induced Shift from Resonance to Charge Transfer |
| المؤلفون: |
Huanhuan Sun (5082386), Mingguang Yao (1296828), Shuang Liu (8449), Yanping Song (657295), Fangren Shen (10875257), Jiajun Dong (3823255), Zhen Yao (161023), Bing Zhao (29538), Bingbing Liu (649305) |
| سنة النشر: |
2021 |
| المجموعة: |
Smithsonian Institution: Digital Repository |
| مصطلحات موضوعية: |
Biophysics, Biochemistry, Evolutionary Biology, Immunology, Cancer, Chemical Sciences not elsewhere classified, Physical Sciences not elsewhere classified, Monolayer MoS 2 Enabled, ML-MoS 2 substrate, resonance-related SERS enhancement, Raman signal enhancement, monolayer molybdenum disulfide, HOMO, surface-enhanced Raman spectroscopy, CT, experiment results show, PI-SERS enhancement, probe molecules, incident laser energy |
| الوصف: |
As a newly emerging approach for surface-enhanced Raman spectroscopy (SERS), pressure-induced SERS (PI-SERS) has been attracting increasing interest for its applications in Raman signal enhancement at extreme conditions. However, how to efficiently realize the PI-SERS enhancement and elucidate the corresponding mechanism remain open questions. Herein, we demonstrate the PI-SERS enhancement up to 8.04 GPa using monolayer molybdenum disulfide (ML-MoS 2 ) as a SERS substrate and three organic molecules with similar energy levels but different symmetries as probes. The combined theory and experiment results show that a pressure-induced increase in the Fermi level of the ML-MoS 2 substrate and a decrease in the highest occupied molecular orbital–lowest unoccupied molecular orbital (HOMO–LUMO) energy gap of probe molecules lead to a transition from the multiple resonance-related SERS enhancement to charge transfer (CT)-dominated PI-SERS selective enhancement, depending on the incident laser energy and the pressure applied. Such PI-SERS selective enhancement has been discussed in the framework of CT-induced strengthening of electron–phonon coupling, as well as a possible match of the structural symmetries between probe molecules and the substrate. This study provides deep insights into our understanding of PI-SERS enhancement, and the revealed mechanism can be extended to other molecules for SERS at extreme conditions. |
| نوع الوثيقة: |
article in journal/newspaper |
| اللغة: |
unknown |
| العلاقة: |
https://figshare.com/articles/journal_contribution/SERS_Selective_Enhancement_on_Monolayer_MoS_sub_2_sub_Enabled_by_a_Pressure-Induced_Shift_from_Resonance_to_Charge_Transfer/14677259Test |
| DOI: |
10.1021/acsami.1c02845.s001 |
| الإتاحة: |
https://doi.org/10.1021/acsami.1c02845.s001Test |
| حقوق: |
CC BY-NC 4.0 |
| رقم الانضمام: |
edsbas.A6DE396E |
| قاعدة البيانات: |
BASE |
