Advanced stress imaging in periodically strained, suspended, quasi-2D membranes: Manifestation of Fano resonance and phonon dynamics insights
Raman imaging is a robust tool for probing nanomaterials, especially 2D systems, regarding phase conformation, composition, defects, internal stress, interfacial interactions, and phonon dynamics. This work presents the first proof-of-concept demonstration of mapping stress distribution, charge-phon...
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| Language: | English |
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Elsevier
2025-04-01
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| Series: | Carbon Trends |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2667056925000276 |
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| author | Souvik Bhattacharjee Biswajit Das Anibrata Banerjee Kalyan Kumar Chattopadhyay |
| author_facet | Souvik Bhattacharjee Biswajit Das Anibrata Banerjee Kalyan Kumar Chattopadhyay |
| author_sort | Souvik Bhattacharjee |
| collection | DOAJ |
| description | Raman imaging is a robust tool for probing nanomaterials, especially 2D systems, regarding phase conformation, composition, defects, internal stress, interfacial interactions, and phonon dynamics. This work presents the first proof-of-concept demonstration of mapping stress distribution, charge-phonon coupling, phonon lifetime, and associated vibrational attributes using a point-by-point, full-spectrum Breit-Wigner-Fano (BWF) analysis over a scalable mesh, cast upon the Raman image. Starting from ultrathin nanostructures, the potency of this technique extends to multi-layered quasi-2D flakes, encompassing vibrational modulations of particular molecular bonds compelled by interlayer van der Waals interactions. The experimental realization involves wrapping chemically processed reduced graphene oxide (rGO) over uniformly spaced, vertically aligned e-beam lithographed pillars. The theoretical foundation is derived from density functional theory (DFT)-based calculations on phonon dispersion, Raman spectra, and associated thermodynamic attributes for layer-specific graphene against varying biaxial tensile stress. Our results unlock the true spectroscopic potential of Raman microscopy in characterizing ‘on-chip’ stressed membranes for emerging applications. |
| format | Article |
| id | doaj-art-1abd5fef01ec44e48ab1fdfac993f52e |
| institution | OA Journals |
| issn | 2667-0569 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Carbon Trends |
| spelling | doaj-art-1abd5fef01ec44e48ab1fdfac993f52e2025-08-20T02:12:07ZengElsevierCarbon Trends2667-05692025-04-011910047710.1016/j.cartre.2025.100477Advanced stress imaging in periodically strained, suspended, quasi-2D membranes: Manifestation of Fano resonance and phonon dynamics insightsSouvik Bhattacharjee0Biswajit Das1Anibrata Banerjee2Kalyan Kumar Chattopadhyay3Department of Physics, Jadavpur University, Kolkata 700 032, India; School of Physical Sciences, Indian Association for the Cultivation of Science, Kolkata 700 032, IndiaDepartment of Physics, Jadavpur University, Kolkata 700 032, India; Department of Basic Science and Humanities, Dr. Sudhir Chandra Sur Institute of Technology & Sports Complex, Kolkata 700 074, IndiaSchool of Materials Science and Nanotechnology, Jadavpur University, Kolkata 700 032, IndiaDepartment of Physics, Jadavpur University, Kolkata 700 032, India; School of Materials Science and Nanotechnology, Jadavpur University, Kolkata 700 032, India; Corresponding author.Raman imaging is a robust tool for probing nanomaterials, especially 2D systems, regarding phase conformation, composition, defects, internal stress, interfacial interactions, and phonon dynamics. This work presents the first proof-of-concept demonstration of mapping stress distribution, charge-phonon coupling, phonon lifetime, and associated vibrational attributes using a point-by-point, full-spectrum Breit-Wigner-Fano (BWF) analysis over a scalable mesh, cast upon the Raman image. Starting from ultrathin nanostructures, the potency of this technique extends to multi-layered quasi-2D flakes, encompassing vibrational modulations of particular molecular bonds compelled by interlayer van der Waals interactions. The experimental realization involves wrapping chemically processed reduced graphene oxide (rGO) over uniformly spaced, vertically aligned e-beam lithographed pillars. The theoretical foundation is derived from density functional theory (DFT)-based calculations on phonon dispersion, Raman spectra, and associated thermodynamic attributes for layer-specific graphene against varying biaxial tensile stress. Our results unlock the true spectroscopic potential of Raman microscopy in characterizing ‘on-chip’ stressed membranes for emerging applications.http://www.sciencedirect.com/science/article/pii/S2667056925000276Stress-imagingFano interferencePhonon dynamicsDFTLithographyCharge-phonon coupling |
| spellingShingle | Souvik Bhattacharjee Biswajit Das Anibrata Banerjee Kalyan Kumar Chattopadhyay Advanced stress imaging in periodically strained, suspended, quasi-2D membranes: Manifestation of Fano resonance and phonon dynamics insights Carbon Trends Stress-imaging Fano interference Phonon dynamics DFT Lithography Charge-phonon coupling |
| title | Advanced stress imaging in periodically strained, suspended, quasi-2D membranes: Manifestation of Fano resonance and phonon dynamics insights |
| title_full | Advanced stress imaging in periodically strained, suspended, quasi-2D membranes: Manifestation of Fano resonance and phonon dynamics insights |
| title_fullStr | Advanced stress imaging in periodically strained, suspended, quasi-2D membranes: Manifestation of Fano resonance and phonon dynamics insights |
| title_full_unstemmed | Advanced stress imaging in periodically strained, suspended, quasi-2D membranes: Manifestation of Fano resonance and phonon dynamics insights |
| title_short | Advanced stress imaging in periodically strained, suspended, quasi-2D membranes: Manifestation of Fano resonance and phonon dynamics insights |
| title_sort | advanced stress imaging in periodically strained suspended quasi 2d membranes manifestation of fano resonance and phonon dynamics insights |
| topic | Stress-imaging Fano interference Phonon dynamics DFT Lithography Charge-phonon coupling |
| url | http://www.sciencedirect.com/science/article/pii/S2667056925000276 |
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