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@article{WOS:001701838600001,
title = {Surface defects in carbon-doped hexagonal boron nitride for
negative-contrast direct laser writing},
author = {Dmitrii Litvinov and Virgil Gavriliuc and Magdalena Grzeszczyk and Kristina Vaklinova and Kenji Watanabe and Takashi Taniguchi and Kostya S Novoselov and Maciej Koperski},
doi = {10.1088/2053-1583/ae463c},
times_cited = {0},
issn = {2053-1583},
year = {2026},
date = {2026-06-01},
journal = {2D MATERIALS},
volume = {13},
number = {2},
publisher = {IOP Publishing Ltd},
address = {No.2 The Distillery, Glassfields, Avon Street, Bristol, ENGLAND},
abstract = {Radiative defects in hexagonal boron nitride (hBN) are active in a broad
spectral range from deep ultraviolet to near-infrared wavelengths.
Representatives of these defects act as bright single photon sources,
spin-1 systems, and multiproperty atomic-scale sensors. They are
predominantly investigated in bulk hBN films, where defects are
decoupled from surface and interfacial effects. Here, we demonstrate a
novel class of surface defects optically active in the green/yellow
visible spectral range, which exhibit photophysical properties distinct
from their bulk counterparts. High-power resonant laser illumination
quenched the emission from the ensemble of such defects, which was
attributed to a light-driven structural reconfiguration. The quenched
defects were found to recover their emissive capabilities via a thermal
cycling process, revealing an activation energy of 24.5 meV for the
structural transition. Alternatively, permanent quenching of the defects
was triggered by surface chemistry, involving lithiation-enabled
attachment of functional groups. These mechanisms were utilized to
realize negative-contrast direct laser writing, designing arbitrary
geometric emissive patterns on demand in a microscopic configuration.
The surface-active radiative centers in hBN appear particularly
attractive for exploring environmental sensitivity, surface science, and
coupling to photonic structures or electronic devices by taking unique
advantage of the two-dimensional characteristics of the host lattice.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{WOS:001619984500001,
title = {Two-Dimensional Materials as a Multiproperty Sensing Platform},
author = {Dipankar Jana and Shubhrasish Mukherjee and Dmitrii Litvinov and Magdalena Grzeszczyk and Sergey Grebenchuk and Makars Siskins and Virgil Gavriliuc and Yihang Ouyang and Changyi Chen and Yuxuan Ye and Meng Yiming and Maciej Koperski},
doi = {10.1002/adfm.202516728},
times_cited = {7},
issn = {1616-301X},
year = {2026},
date = {2026-02-01},
journal = {ADVANCED FUNCTIONAL MATERIALS},
volume = {36},
number = {14},
publisher = {WILEY-V C H VERLAG GMBH},
address = {POSTFACH 101161, 69451 WEINHEIM, GERMANY},
abstract = {Two-dimensional (2D) materials have disrupted materials science due to
the development of van der Waals technology. It enables the stacking of
ultrathin layers of materials characterized by vastly different
electronic structures to create man-made heterostructures and devices
with rationally tailored properties, circumventing limitations of
matching crystal structures, lattice constants, and geometry of
constituent materials and supporting substrates. 2D materials exhibit
extraordinary mechanical flexibility, strong light-matter interactions
driven by their excitonic response, single photon emission from atomic
centers, stable ferromagnetism in sub-nm thin films, fractional quantum
Hall effect in high-quality devices, and chemoselectivity at ultrahigh
surface-to-volume ratio. Consequently, van der Waals heterostructures
with atomically flat interfaces demonstrate an unprecedented degree of
intertwined mechanical, chemical, optoelectronic, and magnetic
properties. This constitutes a foundation for multiproperty sensing,
based on complex intra- and intermaterial interactions, and a robust
response to external stimuli originating from the environment. Here,
recent progress are reviewed in the development of sensing applications
with 2D materials, highlighting the areas where van der Waals
heterostructures offer the highest sensitivity, simultaneous responses
to multiple distinct externalities due to their atomic thickness in
conjunction with unique material combinations, and conceptually new
sensing methodology.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}