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Meeting ID: 841 9696 9329<br>
Passcode: 606954<br>
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data-mce-style="color: #000000; font-family: arial,
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Friday 4th November 2022 at 11:00, IF 3rd wing, lecture hall <strong></strong><br>
<br>
<div><span style="color: #55913c; font-family: times new
roman, new york, times, serif;"><span style="font-size:
21.3333px;" data-mce-style="font-size: 21.3333px;"><b>Atomic
Sculpting of 2D Materials: From Nanoporous Membranes
to Sequencing and Quantum Stuff<br>
</b></span></span></div>
<b style="color: #000000; font-family: arial, helvetica,
sans-serif; font-size: 18.6667px;" data-mce-style="color:
#000000; font-family: arial, helvetica, sans-serif;
font-size: 18.6667px;">Marija Drndic</b><br>
<div><span style="font-family: sans-serif;"><span
style="font-size: 14.6667px;" data-mce-style="font-size:
14.6667px;"><b>Department of Physics and Astronomy<br>
University of Pennsylvania<br>
<a moz-do-not-send="true"
href="drndic@physics.upenn.edu"
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drndic@physics.upenn.edu</a><br>
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<div align="justify">Introducing atomic-scale defects and
holes in 2D materials changes their electrical and optical
properties. When 2D materials are suspended, vacancies make
the membranes permeable to ions and molecules in liquid or
gas phases, allowing transport studies at atomic scales.
Atomic defects can also be interesting ingredients in
quantum devices such as defects and holes in 2D boron
nitride and 2D ferromagnets. Angstrom-size holes can also
allow the passage of water molecules but block the larger
hydrated salt ions and can effectively desalinate water.
Raman peak shifts combined with TEM, provide a comprehensive
approach to characterize the holes and transport through
them. When molecules are driven through 2D nanopores in
solution, they can perturb the ion current flow through the
pore, from which molecule’s physical and chemical properties
can be inferred. DNA other biomolecules can be detected in
this way. Thanks to advanced materials, device designs and
custom electronics, the temporal and spatial resolution for
their detection has been rapidly improving. This
interdisciplinary work advances several disciplines
including in situ electron microscopy.<br>
<br>
[1] Marija Drndić, Nature Review Physics 3, 606, 2021.<br>
[2] Joshua Chen, Adrian Balan, Paul Masih Das, Jothi
Priyanka Thiruraman, Marija Drndić, Ultramicroscopy, 113249,
2021. <br>
[3] Yung-Chien Chou, Joshua Chen, Chih-Yuan Lin, Marija
Drndić, Journal of Chemical Physics 154, 105012, 2021.<br>
[4] Jothi Priyanka Thiruraman, Paul Masih Das and Marija
Drndić, ACS Nano 14, 11831, 2020. <br>
<br>
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<div align="justify"><strong>LOCATION:</strong> <span> </span><strong
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<font face="arial,sans-serif"><strong><span lang="EN-GB"><span
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