Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Sebastian Heeg"'
Autor:
Abhijeet M. Kumar, Denis Yagodkin, Roberto Rosati, Douglas J. Bock, Christoph Schattauer, Sarah Tobisch, Joakim Hagel, Bianca Höfer, Jan N. Kirchhof, Pablo Hernández López, Kenneth Burfeindt, Sebastian Heeg, Cornelius Gahl, Florian Libisch, Ermin Malic, Kirill I. Bolotin
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-8 (2024)
Abstract Intervalley excitons with electron and hole wavefunctions residing in different valleys determine the long-range transport and dynamics observed in many semiconductors. However, these excitons with vanishing oscillator strength do not direct
Externí odkaz:
https://doaj.org/article/8bdb511c5a7748e3bcc5df43a7866d52
Autor:
Roman M. Wyss, Günter Kewes, Pietro Marabotti, Stefan M. Koepfli, Karl-Philipp Schlichting, Markus Parzefall, Eric Bonvin, Martin F. Sarott, Morgan Trassin, Maximilian Oezkent, Chen-Hsun Lu, Kevin-P. Gradwohl, Thomas Perrault, Lala Habibova, Giorgia Marcelli, Marcela Giraldo, Jan Vermant, Lukas Novotny, Martin Frimmer, Mads C. Weber, Sebastian Heeg
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-11 (2024)
Abstract Raman spectroscopy enables the non-destructive characterization of chemical composition, crystallinity, defects, or strain in countless materials. However, the Raman response of surfaces or thin films is often weak and obscured by dominant b
Externí odkaz:
https://doaj.org/article/f552e9180d2c4b819528bb9b65a64ade
Autor:
Pablo Hernández López, Sebastian Heeg, Christoph Schattauer, Sviatoslav Kovalchuk, Abhijeet Kumar, Douglas J. Bock, Jan N. Kirchhof, Bianca Höfer, Kyrylo Greben, Denis Yagodkin, Lukas Linhart, Florian Libisch, Kirill I. Bolotin
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-9 (2022)
Mechanical strain is a powerful tuning knob for excitons in two-dimensional semiconductors. Here, the authors find that under the application of strain, dark and localized excitons in monolayer WSe2 are brought into energetic resonance, forming a new
Externí odkaz:
https://doaj.org/article/e0d2854796d04ac8829185d361ea9b87
Autor:
Roman M. Wyss, Markus Parzefall, Karl-Philipp Schlichting, Cynthia M. Gruber, Sebastian Busschaert, Carin Rae Lightner, Emanuel Lörtscher, Lukas Novotny, Sebastian Heeg
Publikováno v:
ACS Applied Materials & Interfaces, 14 (14)
Surface-enhanced Raman spectroscopy (SERS) demands reliable, high enhancement substrates in order to be used in different fields of application. Here, we introduce freestanding porous gold membranes (PAuM) as easy to produce, scalable, mechanically s
Autor:
Ernie W. Hill, Bruce Grieve, Stefan Goodwin, Zachary Coldrick, Aravind Vijayaraghavan, Sebastian Heeg
Publikováno v:
Goodwin, S, Coldrick, Z, Heeg, S, Grieve, B, Vijayaraghavan, A & Hill, E W 2021, ' Fabrication and electrochemical response of pristine graphene ultramicroelectrodes ', Carbon, vol. 177, pp. 207-215 . https://doi.org/DOI: 10.1016/j.carbon.2021.02.078
University of Manchester-PURE
University of Manchester-PURE
Ultramicroelectrodes (UMEs) are electrochemical working electrodes with at least one dimension less than 25 μm. Here, we demonstrate a method to fabricate pristine (contamination and doping-free) monolayer graphene UMEs and characterise its electroc
Publikováno v:
Journal of Raman Spectroscopy
The electromagnetic enhancement theory describes surface-enhanced Raman scattering (SERS) as a Raman effect that takes place in the near-field of a plasmonic nanostructure. The theory has been very successful in explaining the fundamental properties
Autor:
Lei Shi, Thomas Pichler, Lukas Novotny, Martin Frimmer, Sebastian Heeg, Cla Duri Tschannen, Stephanie Reich, Georgy Gordeev
Publikováno v:
Nano Letters, 20 (9)
We experimentally quantify the Raman scattering from individual carbyne chains confined in double-walled carbon nanotubes. We find that the resonant differential Raman cross section of confined carbyne is on the order of 10−22 cm2 sr−1 per atom,
Publikováno v:
Chinese Physics B. 31:127801
Carbyne is an infinitely long linear chain of carbon atoms with sp1 hybridization and the truly one-dimensional allotrope of carbon. While obtaining freestanding carbyne is still an open challenge, the study of confined carbyne, linear chains of carb
Autor:
Cla Duri, Tschannen, Martin, Frimmer, Georgy, Gordeev, Thiago L, Vasconcelos, Lei, Shi, Thomas, Pichler, Stephanie, Reich, Sebastian, Heeg, Lukas, Novotny
Publikováno v:
ACS nano. 15(7)
We investigate the anti-Stokes Raman scattering of single carbyne chains confined inside double-walled carbon nanotubes. Individual chains are identified using tip-enhanced Raman scattering (TERS) and heated by resonant excitation with varying laser
Publikováno v:
Carbon, 139
Carbon, 139
ISSN:0008-6223
ISSN:0008-6223