Probing carbon isotope effects on the Raman spectra of graphene with different ¹³C concentrations by Bruno R. Carvalho and others 2026-11-05
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Institutional repository: hdl.handle.net/1721.1/98418
Abstract: Raman bands D, G, G* and 2D were measured in graphene with differing carbon-13 concentrations and laser excitation energies; their frequency dependence on isotope mass followed a harmonic-oscillator relation.
Publisher Abstract, journals.aps.org/prb/abstract/10.1103/PhysRevB.92.125406 : the excitation-energy slopes of the G* and 2D Raman positions were unchanged across isotope concentrations; G and 2D linewidths were used to examine concentration-dependent phonon lifetimes. This is the verified abstract locator, not a reconstruction of inaccessible experimental settings.
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The role of surface oxygen in the growth of large single-crystal graphene on copper by Yufeng Hao and others 2026-11-05
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Science 342(6159), 720–723 (8 November 2013), DOI 10.1126/science.1243879, first online 24 October 2013. The primary byline lists Yufeng Hao first, and includes Luigi Colombo and Rodney S. Ruoff. Abstract: surface oxygen on copper reduced graphene nucleation density; controlling it enabled centimetre-scale domains and changed growth kinetics and domain morphology. Used for the demonstrated material-growth variables, not for an unreported author-specific experimental role.
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