Highly Localized Strain in a MoS2/Au Heterostructure Revealed by Tip-Enhanced Raman Spectroscopy; Nano Letters; Vol. 17, iss. 10
| Parent link: | Nano Letters.— , 2001- Vol. 17, iss. 10.— 2017.— [P. 6027–6033] |
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| Údar corparáideach: | |
| Rannpháirtithe: | , , , , , , |
| Achoimre: | Title screen Tip-enhanced Raman spectroscopy (TERS) has been rapidly improved over the past decade and opened up opportunities to study phonon properties of materials at the nanometer scale. In this Letter, we report on TERS of an ultrathin MoS2 flake on a nanostructured Au on silicon surface forming a two-dimensional (2D) crystal/plasmonic heterostructure. Au nanostructures (shaped in triangles) are prepared by nanosphere lithography, and then MoS2 is mechanically exfoliated on top of them. The TERS spectra acquired under resonance conditions at 638 nm excitation wavelength evidence strain changes spatially localized to regions as small as 25 nm in TERS imaging. We observe the highest Raman intensity enhancement for MoS2 on top of Au nanotriangles due to the strong electromagnetic confinement between the tip and a single triangle. Our results enable us to determine the local strain in MoS2 induced during heterostructure formation. The maximum frequency shift of E2g mode is determined to be (4.2 ± 0.8) cm–1, corresponding to 1.4% of biaxial strain induced in the MoS2 layer. We find that the regions of maximum local strain correspond to the regions of maximum topographic curvature as extracted from atomic force microscopy measurements. This tip-enhanced Raman spectroscopy study allows us to determine the built-in strain that arises when 2D materials interact with other nanostructures. Режим доступа: по договору с организацией-держателем ресурса |
| Teanga: | Béarla |
| Foilsithe / Cruthaithe: |
2017
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| Ábhair: | |
| Rochtain ar líne: | https://doi.org/10.1021/acs.nanolett.7b02322 |
| Formáid: | Leictreonach Caibidil leabhair |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=657440 |
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| 200 | 1 | |a Highly Localized Strain in a MoS2/Au Heterostructure Revealed by Tip-Enhanced Raman Spectroscopy |f M. Rahaman [et al.] | |
| 203 | |a Text |c electronic | ||
| 300 | |a Title screen | ||
| 330 | |a Tip-enhanced Raman spectroscopy (TERS) has been rapidly improved over the past decade and opened up opportunities to study phonon properties of materials at the nanometer scale. In this Letter, we report on TERS of an ultrathin MoS2 flake on a nanostructured Au on silicon surface forming a two-dimensional (2D) crystal/plasmonic heterostructure. Au nanostructures (shaped in triangles) are prepared by nanosphere lithography, and then MoS2 is mechanically exfoliated on top of them. The TERS spectra acquired under resonance conditions at 638 nm excitation wavelength evidence strain changes spatially localized to regions as small as 25 nm in TERS imaging. We observe the highest Raman intensity enhancement for MoS2 on top of Au nanotriangles due to the strong electromagnetic confinement between the tip and a single triangle. Our results enable us to determine the local strain in MoS2 induced during heterostructure formation. The maximum frequency shift of E2g mode is determined to be (4.2 ± 0.8) cm–1, corresponding to 1.4% of biaxial strain induced in the MoS2 layer. We find that the regions of maximum local strain correspond to the regions of maximum topographic curvature as extracted from atomic force microscopy measurements. This tip-enhanced Raman spectroscopy study allows us to determine the built-in strain that arises when 2D materials interact with other nanostructures. | ||
| 333 | |a Режим доступа: по договору с организацией-держателем ресурса | ||
| 461 | |t Nano Letters |d 2001- | ||
| 463 | |t Vol. 17, iss. 10 |v [P. 6027–6033] |d 2017 | ||
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| 610 | 1 | |a труды учёных ТПУ | |
| 610 | 1 | |a плазмоника | |
| 610 | 1 | |a напряжение | |
| 610 | 1 | |a рамановская спектроскопия | |
| 610 | 1 | |a дихалькогениды | |
| 610 | 1 | |a двумерные материалы | |
| 610 | 1 | |a MoS2 | |
| 610 | 1 | |a plasmonics | |
| 610 | 1 | |a strain | |
| 610 | 1 | |a Tip-enhanced Raman spectroscopy | |
| 610 | 1 | |a transition metal dichalcogenides | |
| 610 | 1 | |a two-dimensional materials | |
| 701 | 1 | |a Rahaman |b M. |g Manfujur | |
| 701 | 1 | |a Rodriguez (Rodriges) Contreras |b R. D. |c Venezuelan physicist, doctor of science |c Professor of Tomsk Polytechnic University |f 1982- |g Raul David |3 (RuTPU)RU\TPU\pers\39942 |9 21179 | |
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| 701 | 1 | |a Zahn |b D. R. T. |g Dietrich | |
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