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Center for Bionanoscience Research (CIBION), National Scientific and Technical Research Council (CONICET)
Physics Department, Faculty of Exact and Natural Sciences, University of Buenos Aires (UBA)

 Using optical methods, we explore the properties and technological applications of nanoparticles, single molecules, nanostructured materials, supramolecular assemblies, biological and hybrid nanosystems.

The Applied nanoPhysics Group was launched in October 2009 at the Physics Department, Faculty of Exact and Natural Sciences,  of the University of Buenos Aires (UBA)

In 2012 we moved our labs to the Center for Bionanoscience Research (CIBION) of the National Scientific and Technical Research Council (CONICET), while Prof. Stefani still holds his position at the Physics Department of the University of Buenos Aires.

CURRENT RESEARCH ACTIVITIES

Fluorescence nanoscopy.

Super-resolution fluorescence microscopy, also known as fluorescence nanoscopy, has revolutionized biological imaging because they provide deep sub-wavelenght spatial resolution while keeping the low-invasiveness of far-field optical interrogation. We apply and optimize well-established methods like STED and STORM, and develop new ones, such as MINFLUX, and open-source software for fluorescence nanoscopy. With them, we address questions of cellular and neuronal biology.

Optical printing colloidal nanoparticles.

Colloidal chemistry enables the fabrication of nanoparticles of different shapes, sizes and material compositions, that exhibit unique physical and chemical properties, inexistent in bulk materials. In order to make use of those properties in devices and circuits, it is necessary to develope methods to bring the colloidal nanoparticles from the liquid phase to specific locations of solid substrates. We address this challenge using optical forces.

Self-assembled Nanophotonic Devices.

Semiconductor-based devices are approaching intrinsic limits of speed and heat dissipation.
Optical devices are faster and practically loss-less, but their size miniaturization is limited by the wavelength of light. Nanophotonics and Plasmonics deals with the manipulation of light at the nanoscale. We investigate light-matter interaction between single-photon emitters and metallic nanoparticles organized in nanodevices by self-assembly.

LATESTS NEWS

    Focus on Microscopy 2021

    March 31st, 2021|

    This year, the traditional conference Focus on Microscopy - FOM2021 - was held as an online edition from Sunday March 28 to Wednesday March 31, 2021. Our group participated with three contributions: 1) Luciano Masullo presented pulsed interleaved MINFLUX Luciano A. Masullo, Florian Steiner, Jonas Zähringer, Lucía F. Lopez, Johann [...]

      Orienting single-molecules in DNA-origami

      March 4th, 2021|

      DNA-origami technology is wonderful to fabricate all kinds of nanoscopic objects by self-assembly. We, in particular, use them to fabricate nanophotonic devices. That involves placing photon emitters alongside nanoparticles of different materials on well-defined nanometric geometries. DNA-origami is unique in the sense they provide great positional and stoichiometric control; we [...]

        Finally! Super-resolved FRET imaging

        February 24th, 2021|

        Förster resonance energy transfer (FRET) from a fluorophore in the excited state (donor, D) to a fluorophore in the ground state (acceptor, A) provides a signal sensitive to D−A separation distances in the 0−10 nm range, and to various environmental parameters. A vast number of FRET imaging protocols and sensors [...]

          3D TIRF nanoscopy with sub-10 nm resolution

          January 23rd, 2021|

          Single-molecule localization microscopy methods, such as STORM and DNA-PAINT, belong to the most widely used techniques of fluorescence nanoscopy because they provide very good spatial resolution with a simple experimental set-up. STORM reaches lateral resolutions < 20 nm, and DNA-PAINT < 10 nm. However, achieving the same level of resolution [...]

            Congratulations Lars!

            October 5th, 2020|

            Lars Richter came to our group in October 2019 with the support of a DAAD fellowship. For his Master's thesis, he worked closely with Luciano Masullo on our pulsed-interleaved MINFLUX, and was a great member of our research team. Now, Lars has moved to Munich to start a Ph.D. program [...]

              Measuring the temperature of a nanoparticle under illumination

              September 18th, 2020|

              Plasmonic nanoparticles (NPs) are particularly efficient converters of light into heat, making them useful as remote-controlled nanometric sources of heat in numerous applications. However, measuring the temperature of a NP under illumination is not a simple task. In our recent paper in ACS Nano, we present a nanothermometry method based [...]

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              THE GROUP

              PROF. DR. FERNANDO D. STEFANI
              PROF. DR. FERNANDO D. STEFANIPrincipal Investigator
              DR. LUCÍA LÓPEZ
              DR. LUCÍA LÓPEZLab Manager
              Dr. ALAN SZALAI
              Dr. ALAN SZALAIAssistant Researcher
              Super-resolution fluorescence microscpy, Single-molecule biophysics
              DR. IANINA L. VIOLI
              DR. IANINA L. VIOLIAssistant Researcher (INS-UNSAM, CIBION)
              Synthesis, modification and optical manipulation of colloidal nanoprticles
              DR. JULIÁN GARGIULO
              DR. JULIÁN GARGIULOAssistant Researcher (INS-UNSAM, CIBION)
              Optical printing colloidal nanoparticles. Plasmon-assisted chemistry.
              LUCIANA MARTÍNEZ
              LUCIANA MARTÍNEZPh.D. candidate in Physics (University of Buenos Aires)
              Plasmon-assisted chemistry
              SANTIAGO SOSA
              SANTIAGO SOSAPh.D. candidate in Biological Chemistry (University of Buenos Aires)
              Nanofabrication by protein self-assembly
              GONZALO ESCALANTE
              GONZALO ESCALANTEPh.D. candidate in Physics (University of Buenos Aires)
              Super-resolution imaging of chromatin
              FLORENCIA CHOQUE
              FLORENCIA CHOQUEPh.D. candidate in Physics (University of Buenos Aires)
              pulsed interleaved MINFLUX
              FLORENCIA EDORNA
              FLORENCIA EDORNAPh.D. candidate in Physics (University of Buenos Aires)
              Single-molecule localization through sequential structured illumination
              GROUP PICTURES

              COLLABORATORS

              STEFAN HELL
              Max-Planck-Institute for Biophysical Chemistry (Göttingen, Germany)

              THOMAS JOVIN
              Max-Planck-Institute for Biophysical Chemistry (Göttingen, Germany)

              ALFREDO CÁCERES
              Instituto Universitario de Ciencias Biomédidas de Córdoba (Córdoba, Argentina)

              PHILIP TINNEFELD
              Ludwig-Maximilians-University Munich (Germany)

              GUILLERMO ACUNA
              University of Fribourg (Switzerland)

              STEFAN MAIER
              Ludwig-Maximilians-University Munich (Germany)

              ANDREA BRAGAS
              University of Buenos Aires (Argentina)

              JOCHEN FELDMANN
              Ludwig-Maximilians-University Munich (Germany)

              NIEK VAN HULST
              Institute of Photonic Sciences (Barcelona, Spain)

              EDUARDO CORONADO
              Universidad Nacional de Córdoba (Córdoba, Argentina)

              SABRINA SIMONCELLI
              University College London (UK)

              DAMIAN REFOJO
              Biomedicine Research Institute of Buenos Aires (Argentina)

              RODRIGO PALACIOS
              Universidad Nacional de Río Cuarto (Córdoba, Argentina)

              OSCAR CAMPETELLA
              Universidad Nacional de General San Martín (Buenos Aires, Argentina)

              OMAR AZZARONI
              Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (La Plata, Buenos Aires, Argentina)

              GALO SOLER ILLIA
              Universidad Nacional de General San Martín (Buenos Aires, Argentina)

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