Publications de Samuel Mendes Leitão

Open-source microscope add-on for structured illumination microscopy

Theo Lasser, Matthias Lütolf, Aleksandra Radenovic, Andrew Charles Oates, Georg Fantner, John McKinney, Nathan Cyprien Arsène Ronceray, Olivier François Venzin, Antonius Chrisnandy, Prabhu Prasad Swain

Super-resolution techniques expand the abilities of researchers who have the knowledge and resources to either build or purchase a system. This excludes the part of the research community without these capabilities. Here we introduce the openSIM add-on to ...

Nature Portfolio2024

Label-Free Long-Term Methods for Live Cell Imaging of Neurons: New Opportunities

Georg Fantner, Zahra Ayar Dulabi, Samuel Mendes Leitão

Time-lapse light microscopy combined with in vitro neuronal cultures has provided a significant contribution to the field of Developmental Neuroscience. The establishment of the neuronal polarity, i.e., formation of axons and dendrites, key structures resp ...

MDPI2023

Nanopore-based scanning system and method

Aleksandra Radenovic, Georg Fantner, Vytautas Navikas, Samuel Mendes Leitão

Nanopore-based scanning system including a probe structure comprising a nanopore; suction means configured to draw an end of a (bio)molecule inside the nanopore and inside the probe structure, single or multiple times; and displacement means configured to ...

2023

Time-Resolved Scanning Ion Conductance Microscopy and Single-Molecule Spectroscopy

Samuel Mendes Leitão

The evolution of the 3D morphology is at the center of many relevant biological processes ranging from cellular differentiation to cancer invasion and metastasis. Microscopy techniques, such as electron microscopy (EM), super-resolution (SR) optical micros ...

EPFL2023

Spatially multiplexed single-molecule translocations through a nanopore at controlled speeds

Aleksandra Radenovic, Georg Fantner, Barney Frederick Drake, Helena Miljkovic, Simon Finn Mayer, Sanjin Marion, Vytautas Navikas, Samuel Mendes Leitão

In current nanopore-based label-free single-molecule sensing technologies, stochastic processes influence the selection of translocating molecule, translocation rate and translocation velocity. As a result, single-molecule translocations are challenging to ...

2023

Structural diversity of photoswitchable sphingolipids for optodynamic control of lipid microdomains

Samuel Mendes Leitão

Sphingolipids are a structurally diverse class of lipids predominantly found in the plasma membrane of eukaryotic cells. These lipids can laterally segregate with other rigid lipids and cholesterol into liquid-ordered domains that act as organizing centers ...

2023

An expanded palette of photoswitchable sphingolipids for optical control of lipid microdomains

Samuel Mendes Leitão

WILEY2022

Time-Resolved Scanning Ion Conductance Microscopy for Three-Dimensional Tracking of Nanoscale Cell Surface Dynamics

Aleksandra Radenovic, Georg Fantner, Daniel Constam, Alexandre Louis André Persat, Barney Frederick Drake, Adrian Pascal Nievergelt, Vytautas Navikas, Samuel Mendes Leitão, Xavier Jean-Yves Pierrat, Charlène Cécile Geneviève Brillard

Nanocharacterization plays a vital role in understanding the complex nanoscale organization of cells and organelles. Understanding cellular function requires high-resolution information about how the cellular structures evolve over time. A number of techni ...

AMER CHEMICAL SOC2021

Correlative 3D microscopy of single cells using super-resolution and scanning ion-conductance microscopy

Aleksandra Radenovic, Georg Fantner, Barney Frederick Drake, Vytautas Navikas, Adrien Charles-François Raymond Descloux, Samuel Mendes Leitão, Kristin Stefanie Grussmayer

High-resolution live-cell imaging is necessary to study complex biological phenomena. Modern fluorescence microscopy methods are increasingly combined with complementary, label-free techniques to put the fluorescence information into the cellular context. ...

Nature Research2021

High-Throughput Nanocapillary Filling Enabled by Microwave Radiation for Scanning Ion Conductance Microscopy Imaging

Aleksandra Radenovic, Georg Fantner, Sanjin Marion, Vytautas Navikas, Sebastian James Davis, Samuel Mendes Leitão

Solid-state nanopores provide a highly sensitive tool for single-molecule sensing and probing nanofluidic effects in solutions. Glass nanopipettes are a cheap and robust type of solid-state nanopore produced from pulling glass capillaries with opening orif ...

2020