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ERC Consolidator Grant 771193, Single Atom Radio Frequency Fingerprinting (SARF) WWW.JKU.AT/SARF


 

Funded by: European Research Council, opens an external URL in a new window (ERC)
Principal investigator: Stefan Müllegger
Duration: 1.4.2018 - 30.9.2024
see also: Fodok, opens an external URL in a new window

News, Presentations & Publications

2022-08-10 Stefan gives invited talk on SARF results at the International Conference on Materials Science, Engineering & Technology, opens an external URL in a new window, Aug 10 - 12, 2022, online.

2022-06-01 We welcome our new colleague, B.Sc. Asem Al Baser, strengthening SARF team.

2022-05-01 We welcome our new colleague, M.Sc. Doris Ostner, strengthening SARF team.

2022-04-13 New publication: B. Wit, R. Vranik and S. Müllegger, Enhanced conductance response in radio frequency scanning tunnelling microscopy, Sci. Rep. 12, 6183 (2022). doi.org/10.1038/s41598-022-09820-7, opens an external URL in a new window

2022-02-21 New publication: V. Stetsovych, S. Feigl, R. Vranik, B. Wit, E. Rauls, J. Nejedlý, M. Šámal, I Starý and S. Müllegger, Towards dielectric relaxation at a single molecule scale, Sci. Rep. 12, 2865 (2022).  dx.doi.org/10.1038/s41598-022-06684-9, opens an external URL in a new window

2021-12-07 New manuscript submitted. dx.doi.org/10.21203/rs.3.rs-1149839/v1, opens an external URL in a new window

2021-11-23 New manuscript submitted. dx.doi.org/10.21203/rs.3.rs-1106158/v1, opens an external URL in a new window

2021-08 Installing our new RFSTM machine

2021-07-23  Front Cover, opens an external URL in a new window of Journal Small.

2021-07-12 Bart presents his SARF results (2 talks, online) at the ICN+T 2021, opens an external URL in a new window.

2021-06-28 Rado presents his SARF results (talk, online) at The European Conference Physics of Magnetism, opens an external URL in a new window, Poznan, Poland.

2021-06-17 SARF workshop takes place online. www.jku.at/sarf/workshop

2021-06-14 Accepted as Front Cover of Small. DOI: 10.1002/smll.202101253, opens an external URL in a new window

2021-05-16 New publication: S. Grall, I. Alic, E. Pavoni, M. Awadein, T. Fujii, S. Müllegger, M. Farina, N. Clement, and G. Gramse, Attoampere Nanoelectrochemistry. Small (2021): DOI: 10.1002/smll.202101253, opens an external URL in a new window

2021-05-07 Stefan presents SARF project at the Workshop Young Physics Scientists 2021, addressing specifically physics-interested pupils of Upper Austria.

2021-04-29 Local public press of Upper Austria: Article, opens an external URL in a new window highlighting Simon's work for SARF project.

2021-04-12 New publication: S. Feigl, R. Vranik, B. Wit and S. Müllegger, Frequency-independent voltage amplitude across a tunnel junction. Rev. Sci Instr. 92, 043710 (2021). https://doi.org/10.1063/5.0035388, opens an external URL in a new window

2021-03-23 Stefan is happy to follow the invitation of Prof. Damien Riedel (Institut des Sciences Moléculaires d'Orsay) to present SARF at the University-Paris-Saclay, see invited talk: Radio frequency signals from single molecules, opens an external URL in a new window.

2020-12-07 Radovan has received the IUVSTA Peter Barna Award at ICTF 18 for his excellent presentation entitled "Pi-Radical as potential candidate for Radio Frequency Scanning Tunneling Microscopy study" on behalf of the International Union for Vacuum Science Technique and Applications (IUVSTA). Congratulations!

2020-11-23 Talk at 18th International Conference on Thin Films & 18th Joint Vacuum Conference (ICTF & JVC), Budapest, Hungary, R. Vranik, Adsorption and Self-Assembly of Organic Stable Pi Radicals on Metal Substrates

2020-11-20 Submitted for publication: S. Grall et al. Attoampere Nanoelectrochemistry. Electronic pre-print see: http://arxiv.org/abs/2011.10405, opens an external URL in a new window

2020-11-10 Talk at Single-Molecule Sensors and NanoSystems International Conference (S3IC), Barcelona, Spain, R. Vranik, Pi-Radical Kondo Surface State Exhibits Nodal Structure

2020-10-28 Sumitted for publication: S. Feigl et al., Frequency-independent voltage amplitude across a tunnel junction. Electronic pre-print see: http://arxiv.org/abs/2011.12673, opens an external URL in a new window

2020-10-15 We welcome our new colleague, Dr. Abhishek Kumar, strengthening SARF team.

2020-07-15 We welcome our new colleague, Dr. Bareld Wit, strengthening SARF team.

2020-06-17 New publication: We have successfully characterized a  new molecular spin-1/2 model system by LT-STM, see: R. Vranik et al., Stable π-radical 2,2-diphenyl-1-picrylhydrazyl (DPPH) adsorbed at the elbows of \(22\times\sqrt{3}\)  reconstructed Au(111), Surf. Sci. 700, 121676 (2020). DOI: 10.1016/j.susc.2020.121676, opens an external URL in a new window

2020-05-15 After long weeks of homeoffice, lab work is gradually becoming possible again, with severe safety resctrictions and in one-person-per-lab mode.

2020-03-17 Laboratory work has to be discontinued due to Covid-19 crisis.

+++ DPG has been officially cancelled +++ 2020-03-16 Talk at DPG Frühjahrstagung in Dresden, Germany: R. Vranik, Electronic Properties of Stable Pi-Radicals Grown on Metal Substrates, opens an external URL in a new window

2020-02-15 New face! Master student Stefan Steiner joins SARF team.

2019-11 Building of our new lab room ("206er, opens a file") has finished. It waits for our new RFSTM system.

2019-10-09 S. Müllegger has invited Prof. Damien Riedel (University Paris-Saclay)  for talk at JKU Physics Colloquium: From Single molecule to molecular devices: Manipulation and excitation at the nanoscale, opens a file

2019-09-16 Talk at ECMM in Firenze, Italy: S. Müllegger, Radio-frequency STM for mechanical resonance spectroscopy at the single-molecule level, opens an external URL in a new window

2019-09-16 Poster at ECMM in Firenze, Italy: R. Vranik, Electronic Properties of Stable Pi-Radicals Grown on Metal Substrates

2019-09-09 Talk at 2nd Polish-Austrian workshop on Surface Modifications by Organic Molecules (SMOM) at JKU Linz, Austria: R. Vranik, Electronic Properties of Stable PI-Radicals Grown on Metal Substrates

2019-07-02 Talk at ICN+T, opens an external URL in a new window in Malmö, Sweden: S. Müllegger, Radio-frequency STM for mechanical resonance spectroscopy at the single-molecule level

2019-06-01 New face! PostDoc Dr. Simon Feigl joins SARF team.

2019-03-28 Talk at STM workshop, opens an external URL in a new window in Lednice, Czech Republic: R. Vranik, Radio-frequency scanning tunneling spectroscopy of helicene molecules on Ag(111)

2019-02 Poster at LIT Day at JKU Linz, Austria: S. Müllegger, Single-Atom Radio Frequency Fingerprinting

2019-01-18 Talk at LIOS at JKU Linz, Austria: S. Müllegger, Radio frequency signals from single atoms & molecules

2018-12-13 Talk at ICPS³ at JKU Linz, Austria: L. Haidinger, Towards Single Atom Identification

2018-12-13 Talk at ICPS³ at JKU Linz, Austria: D. Farka, Liquid Phase and EC-STM

2018-12-13 Talk at ICPS³ at JKU Linz, Austria: R. Vranik, Quantum Molecular Rotor

2018-11-26 Talk at JKU Linz, Austria: S. Müllegger, Radio frequency signals from single molecules: The 6th sense of scanning tunneling microscopy

2018-11-06 D. Farka attends 3 weeks ECSTM training in the group of Hans Elemans, Univ. Nijmegen, the Netherlands.

2018-10-01 New face! PhD student M.Sc. Radovan Vranik joins SARF team.

2018-09-18 D. Farka attends ECSTM training in the group of Stijn Mertens, TU Vienna, Austria.

2018-09-13 Talk at the 68th Annual Meeting of the Austrian Physical Society, opens an external URL in a new window, Graz, Austria: V. Stetsovych, Resonant Excitation of Helicene Single Molecules by Radio-Frequency Scanning Tunneling Microscopy

2018-08-08 D. Farka attends EC-STM training by Bruker Inc., Karlsruhe, Germany.

2018-08-07 Poster at PASPS, opens an external URL in a new window, Linz, Austria: L. Haidinger, Radio Frequency Scanning Tunneling Spectroscopy on Molecular Resonators

2018-07-27 Talk at ICN+T in Brno, opens an external URL in a new window, Czech Republic: S. Müllegger, Radio-frequency scanning tunneling microscopy of helicene/Ag(111)

2018-06-05 Talk at University Leoben, Austria: S. Müllegger, Radio-frequency STM on molecular & atomic resonators

2018-05-22 Press release in Kronenzeitung "Atom-Fingerprints"

2018-05-15 Talk at Rotary Club, Bad Ischl, Austria: S. Müllegger, Experimente mit einzelnen Atomen und Molekülen

2018-05-15 New face! PostDoc Dr. Dominik Farka joins SARF team.

2018-05-01 New face! PostDoc, Dr. Vitalii Stetsovych joins SARF team.

 

Why?

Modern nanoscience approaches the atomic scale: Individual atoms, rather than ensembles, carry the functionalities of man-made devices (switching, storing, calculating, catalyzing, etc).

While single-atom imaging is routine since the advent of the scanning tunneling microscope (STM) in the ‘80s, their chemical identification is difficult.

We develop a “6th sense” that turns the STM from an imaging- to an identification tool with atomic resolution.

How?

We feed alternating voltage signals at radio-frequency (MHz to GHz) to single atoms that are individually selectable by the probe tip.

The simultaneous measurement of electric tunnel conductance yields peaks at characteristic frequencies, where the selected atom resonates, i.e. a chemical fingerprint.

Thus, different atoms become distinguishable.

About SARF

Precise investigation tools for analyzing and manipulating matter down to the scale of single atoms are the eyes, ears and fingers of nanoscience and -engineering. It is widely accepted that these technologies have the potential to change our society even more significantly in the years to come than they have already done so in the past.

We take these nano-analytical „senses“ one next step beyond the present state of the art. Our project is breaking new grounds by enabling spectral fingerprinting of single atoms for elemental identification and intra-molecular chemical analytics with sub-nanometer spatial resolution and operating in vacuum- as well as liquid-phase environments.

This combination of analytical capabilities simultaneously in a single tool is highly desirable already today: ever more, in diverse fields of present nanoscience and -technology, decisive functions like switching of electrical current, storing of information or catalyzing a chemical reaction are taken over nor more than a single individual atom or molecules - rather than large ensembles. For instance, think of spintronics, sensorics, catalysis, or medicinal drug development.

Our project follows two visions: First, we aim at realizing the challenging goal of RF-STM based resonance spectroscopy for fingerprinting (identifying) single atoms and molecules. Secondyl, we try to achieve this goal by utilizing such technical means that require relatively mild monetary resources, including conventional dc conductance measurements. We believe this to be crucial in order to make the new technology accessible to a broad community.

For specific fingerprinting, our project realizes resonance spectroscopy at giga-Hertz frequencies combined with scanning tunneling microscopy. Characteristic resonance signals are locally detectable by the probe tip as small changes of electrical conductance that enable elemental and chemical identification. We develop single-atom fingerprinting on different atomic and molecular systems to cover a broad spectrum of applications, including magnetic and nonmagnetic metals as well as functional organic molecules.

If successful, our project will provide a controlled, versatile, fast and readily applicable “atom-by-atom” matter analysis, where single atoms are selected and identified one by one in real time and space. An all that at relatively mild equipment costs compared to other methods in order to make this new methodology accessible to a broad community.

Team

B.Sc. Asem Al Baser

Dr. Abhishek Kumar ORCID, opens an external URL in a new window

Dr. Bareld Wit ORCID, opens an external URL in a new window

Prof. Stefan Müllegger (PI) ORCID, opens an external URL in a new window

 

Former team members:

M.Sc. Doris Ostner

M.Sc. Radovan Vranik

Dr. Luyang Song

Dr. Simon Feigl

Dr. Vitalii Stetsovych

 

Join Us:

I am constantly looking for proactive and enthusiastic students to join my group.

I offer various possibilities for conducting bachelor, master or PhD thesis.

At your request I am able to offer flexible working conditions and multidisciplinary topics.

If you think you fit into my group, please don't hesitate to send further inquiries to stefan.muellegger@jku.at

You find all present job vacancies at the job portal Euraxess, opens an external URL in a new window. Search for "SARF". Voila!