Über e-conversion

@article{nokey,

title = {High-energy interlayer exciton ensembles in MoSe 2/WSe 2 heterostructures by Laguerre-Gaussian excitation},

author = {M Troue and J Figueiredo and G Mittermair and J Kiemle and S Loy and H Lambers and T Taniguchi and K Watanabe and U Wurstbauer and A W Holleitner},

url = {\<Go to ISI\>://WOS:001879354700001},

doi = {10.1088/2053-1583/aea31d},

issn = {2053-1583},

year  = {2026},

date = {2026-12-01},

journal = {2d Materials},

volume = {13},

number = {4},

abstract = {We reveal the higher energetic luminescence part of interlayer exciton ensembles in MoSe 2/WSe 2 heterostructures upon excitation by an optical Laguerre-Gaussian mode. The excitation is achieved with the help of a spatial light modulator giving rise to a ring-shaped distribution of interlayer excitons. A hyperspectral analysis of the exciton photoluminescence suggests that the excitation scheme allows the accumulation of high-energetic excitons in the rings' center. Since the exciton luminescence exhibits a negligible variation of the energetic blue shift of the emission energy as a function of intensity across the rings, we can exclude spatially varying exciton-exciton interactions and a local phase-space filling of lower exciton states to be the dominant underlying process. An incomplete thermalization and an inward propagation of non-thermalized excitons consistently explain the accumulation of high-energetic excitons in the rings' center.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Light-driven olefin epoxidation via poly(Triazine Imide): A route towards sustainable epoxide production},

author = {G A Diab and G P De Sanctis and R M Ferreira and B G Jos\'{e} and K K\"{u}ster and J Sinisi and I R S Menezes and K Krambrock and I L Moudrakovski and V Duppel and B Kumru and I F Teixeira},

url = {\<Go to ISI\>://WOS:001756967700001},

doi = {10.1016/j.apcatb.2026.126839},

issn = {0926-3373},

year  = {2026},

date = {2026-10-05},

journal = {Applied Catalysis B-Environment and Energy},

volume = {394},

abstract = {The selective and sustainable synthesis of epoxides remains a critical challenge in chemical industry, as conventional oxidation routes often rely on transition metals, hazardous oxidants, and energy-intensive conditions, resulting in poor atom economy and limited sustainability. Herein, we report a transition-metal-free photo-catalyst system capable of promoting olefin epoxidation under mild conditions. Poly(triazine imide) (PTI), a highly crystalline carbon nitride, achieves near-quantitative styrene conversion with good selectivity toward styrene oxide under visible-light irradiation, using molecular oxygen (O2) as the sole oxidant and without the need for stoichiometric oxidants, chemical additives and harsh conditions typical of traditional protocols. A comprehensive structural and optoelectronical characterization was performed to correlate catalytic performance with the intrinsic properties of the material. Furthermore, mechanistic investigations were conducted to identify the key reactive species involved in the reaction. In situ EPR spin-trapping experiments reveal the cooperative involvement of photogenerated charge carriers and radical superoxide (O2 center dot-), driving the selective epoxidation process and singlet oxygen as the responsible for the byproducts. Overall, these findings highlight PTI as an efficient metal-free photocatalyst for O2-driven olefin epoxidation and demonstrate the potential of crystalline poly(triazine imide) materials as promising platforms for sustainable oxidation processes.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{nokey,

title = {Ultrafast Laser-Induced Photothermoelectric Currents in Graphene Junctions in the Mid-Infrared},

author = {N Pettinger and M Panhans and J Schmuck and S Loy and X Y Zhou and C Y Dong and J A Robinson and S Zherebtsov and C Kastl and F Ortmann and A W Holleitner},

url = {\<Go to ISI\>://WOS:001883097400001},

doi = {10.1021/acs.nanolett.6c03809},

issn = {1530-6984},

year  = {2026},

date = {2026-09-22},

journal = {Nano Letters},

abstract = {We investigate the carrier dynamics in graphene junctions under mid-infrared excitation using ultrafast pump-probe photocurrent spectroscopy. We utilize dual split gate devices to demonstrate that the photothermoelectric effect can dominate the photocurrent response of graphene also for a mid-infrared femtosecond excitation. Graphene retains its broadband photocurrent response in this spectral region, but the photocurrent relaxation time increases from similar to 2 ps below 8-9 mu m up to 3 ps at longer mid-infrared wavelengths. The absence of a pronounced phonon bottleneck in the decay dynamics at room temperature suggests an efficient interplay of electron-electron and electron-phonon scattering even for photon energies below the optical phonon energy in graphene. The observed wavelength dependence of the photocurrent relaxation times is consistent with energy-dependent theoretical relaxation times as derived from a microscopic transport theory of graphene that includes electron-phonon coupling within a Holstein-Peierls Hamiltonian.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}