Skip to content

Jack Hellerstedt

  • Home
  • about / cv
  • Blog
  • research

Recent Posts

  • scanbot
  • Mott transition in kagome MOF
  • Striped Phase
  • MgPc ARPES
  • Counting Molecules

Recent Comments

  • 2021 AIP summer meeting – Jack Hellerstedt on Kagome metal-organic framework
  • 2021 AIP summer meeting – Jack Hellerstedt on MgPc-MgPc Hybridization
  • March Meeting 2021 – Jack Hellerstedt on MgPc-MgPc Hybridization

Archives

  • July 2024
  • April 2024
  • November 2022
  • August 2022
  • March 2022
  • December 2021
  • September 2021
  • May 2021
  • March 2021
  • February 2021

RSS Jack Hellerstedt

  • scanbot July 16, 2024
    Jules has put in the hard yards implementing nanonisTCP as a python module, and leveraged that to create scanbot, a tool for automating the tasks of preparing a good imaging & spectroscopy probe, as well as a suite of functions for performing nuanced, drift-corrected measurements over very long timescales. See the below example of systematically […]
    jhellerstedt
  • Mott transition in kagome MOF April 29, 2024
    Ben & Bernard’s work on the two-dimensional kagome metal-organic framework is out this week (26 April 2024) in Nature Comms. It was fantastic to see interesting electronic properties emerge at relatively big energy scales for this sort of work, when we were finally able to get the 2d kagome MOF composed of Cu adatoms & […]
    jhellerstedt
  • Striped Phase November 20, 2022
    While pursuing metal-organic frameworks, we stumbled on something unexpected but experimentally robust back in June of 2019. DCA molecules and Au adatoms on Ag111 form DCA-Au-DCA units, and the cyano groups aren’t involved as you’d intuitively expect. It took some heroic effort and creative thinking from Adam & the team in Prague to “just run […]
    jhellerstedt
  • MgPc ARPES August 17, 2022
    We had the opportunity to use the new toroidal analyzer at the Australian synchrotron to do ARPES of self-assembled monolayers of MgPc on Ag100. Careful simultaneous fitting of different high-symmetry EDC measurements, in concert with the structural understanding gleaned from ncAFM & LEED characterization, allowed us to tease out a feature with bandwidth 20 meV, […]
    jhellerstedt
  • Counting Molecules March 9, 2022
    9-azidophenanthrene produces a rich manifold of products when deposited on Ag(111). The images we took for this study inspired this work to develop a lightweight script to count the molecules we observed, and categorize them. Our personal journey of computer vision rediscovery led us to Zernike moments, a rotationally invariant basis set that solves the […]
    jhellerstedt
  • 2021 AIP summer meeting December 12, 2021
    I talked about our MgPc SPM/ ARPES results at the AIP summer meeting.
    jhellerstedt
  • Kagome metal-organic framework September 13, 2021
    Kondo effect as STM fingerprint of strong correlations in substrate-supported metal-organic framework.
    jhellerstedt
  • Concerted Proton Transfer May 26, 2021
    We stumbled on a very curious observation in the summer of 2018 with DABQDI molecules provided by Olivier Siri‘s team. While evaluating its experimental suitability for 1d coordination with metals, which has already proven to be fruitful, we noticed the molecules forming chain-like structures even before we introduced metal adatoms. The low temperature SPM results […]
    jhellerstedt
  • March Meeting 2021 March 12, 2021
    I’m presenting Marina’s work on MgPc hybridization in Focus Session B56 on Monday 15/3 at 1318 (CDT). Link to my presentation slides. Other talks from our group:Dhaneesh Kumar, “Kondo Effect in a 2D Kagome Metal-organic Framework on a Metal” (15/3 1218 CDT) Bernard Field, “Electronic and Magnetic Structure of Metal-Organic Lattices on Substrates” (15/3 1242 […]
    jhellerstedt
  • MgPc-MgPc Hybridization February 12, 2021
    Marina Castelli studied the phthalocyanine containing magnesium (MgPc) via 5K scanned probe microscopies extensively during her PhD. ‘Routine’ STM characterisation showed that the molecules were interacting with one another on the Ag100 surface. ncAFM showed identical contrast for all molecules, pointing to an electronic origin to the observed changes in appearance. Our key observation was […]
    jhellerstedt

March Meeting 2021

I’m presenting Marina’s work on MgPc hybridization in Focus Session B56 on Monday 15/3 at 1318 (CDT).

Link to my presentation slides.

Other talks from our group:
Dhaneesh Kumar, “Kondo Effect in a 2D Kagome Metal-organic Framework on a Metal” (15/3 1218 CDT)

Bernard Field, “Electronic and Magnetic Structure of Metal-Organic Lattices on Substrates” (15/3 1242 CDT)

Ben Lowe, “Atomic-Scale Evidence of Surface-Catalyzed Gold-Carbon Covalent Bonding” (18/3 1206 CDT)

Posted on March 12, 2021Author jhellerstedtCategories presentationsTags conference, talk

Post navigation

Previous Previous post: MgPc-MgPc Hybridization
Next Next post: Concerted Proton Transfer
Proudly powered by WordPress