Article
Chemistry, Multidisciplinary
Qigang Zhong, Alexander Ihle, Sebastian Ahles, Hermann A. Wegner, Andre Schirmeisen, Daniel Ebeling
Summary: Constructing low-dimensional covalent assemblies with tailored size and connectivity is challenging but important in molecular electronics for tuning the properties of quantum materials. A versatile approach has been developed for building such structures block by block on a surface through highly selective tip-induced intermolecular reactions.
Article
Chemistry, Multidisciplinary
Nicolas Neel, Joerg Kroeger
Summary: The study revealed that the formation of a chemical bond between a CO molecule and a Cu(111) surface is accompanied by bending of the molecular probe due to van der Waals attraction and Pauli repulsion, resulting in characteristic changes in the vertical force between CO and Cu(111) as a function of molecule-surface distance. Experimental data were successfully reproduced by model calculations, shedding new light on vertical-force extrema in scanning probe experiments.
Article
Chemistry, Multidisciplinary
Ana Barragan, Tomas Nicolas-Garcia, Koen Lauwaet, Ana Sanchez-Grande, Jose Urgel, Jonas Bjork, Emilio M. Perez, David Ecija
Summary: Nanocars are carbon-based single-molecules that can be precisely controlled on a surface at the atomic scale. The design of these molecules plays a crucial role in advancing the development of molecular machines and understanding self-assembly and other processes. In this study, we present the design and construction of a collection of minimalistic nanocars featuring an anthracene chassis and benzene derivatives as wheels. By using a scanning tunneling microscope (STM) tip to induce a dipole in the nanocar, we were able to manipulate it along the surface, achieving controlled and rapid displacement. The use of carbon monoxide functionalized tips prevented decomposition and accidental picking up of the nanocars during manipulation, leading to our success in the Nanocar Race II championship.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Shantanu Mishra, Shadi Fatayer, Saleta Fernandez, Katharina Kaiser, Diego Pena, Leo Gross
Summary: We report the on-surface synthesis of a non-benzenoid triradical through dehydrogenation of truxene (C27H18) on coinage metal and insulator surfaces. The final product truxene-5,10,15-triyl (1) retains its open-shell quartet ground state on a two monolayer-thick NaCl layer on a Cu(111) surface, and its frontier orbital densities correspond to spin-split singly occupied molecular orbitals.
Article
Chemistry, Multidisciplinary
Klara Strobl, Ekaterina Selivanovitch, Pablo Ibanez-Freire, Francisco Moreno-Madrid, Iwan A. T. Schaap, Rafael Delgado-Buscalioni, Trevor Douglas, Pedro J. de Pablo
Summary: This study explores a method for studying molecular function in confined environments by packing biomolecules inside virus capsids and monitoring the emission signal of green fluorescent proteins using atomic force microscopy and total internal reflection fluorescence microscopy. The results show that mechanical and electronic quenching can be decoupled by using different tips, revealing insights into the behavior of green fluorescent proteins within virus capsids.
Article
Nanoscience & Nanotechnology
Patrick Stohmann, Sascha Koch, Yang Yang, Christopher David Kaiser, Julian Ehrens, Juergen Schnack, Niklas Biere, Dario Anselmetti, Armin Goelzhaeuser, Xianghui Zhang
Summary: Ultrathin membranes with subnanometer pores for molecular size-selective separation were created through electron-induced cross-linking of self-assembled monolayers (SAMs) on surfaces.
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Ulrike Doering, Dmitry Grigoriev, Tino Riske, Andreas Fery, Alexander Boeker
Summary: The mechanical properties of proteinaceous and composite microcapsules loaded with oil were measured using SFM and evaluated with the Reissner model. The results showed significantly higher Young's moduli in protein capsules due to intermolecular crosslinking, while conformational restrictions in composite microcapsules led to reduced elasticity.
Article
Materials Science, Multidisciplinary
Niko Oinonen, Lauri Kurki, Alexander Ilin, Adam S. Foster
Summary: This study proposes a machine learning model to address the challenge of interpreting atomic force microscope (AFM) image data. The model successfully extracts molecule graphs from simulated AFM images, but further work is needed to improve its robustness for real AFM images.
Article
Chemistry, Multidisciplinary
Eugene Jia Hao Soh, Hippolyte P. A. G. Astier, Dan Daniel, Jia Qing Isaiah Chua, Ali Miserez, Zian Jia, Ling Li, Sean J. O'Shea, Harish Bhaskaran, Nikodem Tomczak, Christian A. Nijhuis
Summary: In this study, we demonstrate the direct manipulation and control of liquid metal droplets using an atomic force microscope, achieving repeated contact and separation with self-assembled monolayers in different environments. We successfully create well-defined contact areas of liquid droplets on alkanethiolate SAMs in ethanol, and achieve smaller geometric contact areas in air compared to previous studies.
Article
Physics, Multidisciplinary
M. Omidian, S. Leitherer, N. Neel, M. Brandbyge, J. Kroeger
Summary: Through experiments and calculations, we found that under an external electric field, the polar covalent bond between a gold atom and a carbon atom on graphene exhibits different strengths and stabilities depending on the orientation of the field.
PHYSICAL REVIEW LETTERS
(2021)
Article
Chemistry, Physical
Kristopher K. Barr, Naihao Chiang, Andrea L. Bertozzi, Jerome Gilles, Stanley J. Osher, Paul S. Weiss
Summary: Scanning probe techniques have been enhanced by improving data acquisition and image processing algorithms, enabling more detailed analysis of surfaces and interfaces, including image segmentation by domains, detection of dipole direction, and hydrogen-bonding interactions. The computational algorithms used in these techniques are continually evolving, with the incorporation of machine learning to the next level of iteration. However, real-time adjustments during data recording are still a challenge for significantly enhancing microscopy and spectroscopic imaging methods.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Review
Chemistry, Multidisciplinary
Luzhi Zhang, Shuo Chen, Zhengwei You
Summary: Elastomers are widely used in various industries and have attracted attention in emerging fields. To enhance their properties and functionalities, researchers have developed a hybrid cross-linking strategy, incorporating various noncovalent interactions and dynamic covalent bonds, to construct diverse functional elastomers.
ACCOUNTS OF CHEMICAL RESEARCH
(2023)
Article
Chemistry, Physical
David Abbasi-Perez, Hongqian Sang, Filipe L. Q. Junqueira, Adam Sweetman, J. Manuel Recio, Philip Moriarty, Lev Kantorovich
Summary: A computational strategy was developed to explore the cyclical vertical manipulation of single atoms on the GaAs(110) surface, identifying tips capable of picking up and depositing an adatom. Success in manipulation depends on specific lateral and vertical tip distances, with a practical experimental protocol proposed for potential cyclical manipulation of single atoms on a nonmetallic surface.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Analytical
Yirong Xia, Wei Ni, Xiaorong Wang, Yougui Yu, Qing Zheng, Ximing Huang
Summary: This study constructed a specific molecular switch that can control the oxidation and non-oxidation states of dopamine, which is expected to play an important role in cellular physiology research.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Itai Keren, Alon Gutfreund, Avia Noah, Nofar Fridman, Angelo Di Bernardo, Hadar Steinberg, Yonathan Anahory
Summary: The positions of Abrikosov vortices are considered as a means to encode classical information. In this study, we demonstrate the control of vortices using Nb loops patterned below a NbSe2 layer. Our results show the precise localization of vortices and the ability to push and pull them between adjacent loops. This opens up possibilities for integrating vortices in future quantum circuitry and exploring topological quantum computing.
Meeting Abstract
Biophysics
Daniel Lauster, Valentin Reiter-Scherer, Luis Jose Cuellar Camacho, Sumati Bhatia, Juergen P. Rabe, Rainer Haag, Andreas Herrmann
BIOPHYSICAL JOURNAL
(2019)
Article
Chemistry, Physical
Katherine Herman, Holm Kirmse, Alberto Eljarrat, Christoph T. Koch, Stefan Kirstein, Juergen P. Rabe
COLLOID AND POLYMER SCIENCE
(2020)
Article
Chemistry, Multidisciplinary
Abbas Faghani, Mohammad Fardin Gholami, Matthias Trunk, Johannes Mueller, Pradip Pachfule, Sarah Vogl, Ievgen Donskyi, Mingjun Li, Philip Nickl, Jingjing Shao, Michael R. S. Huang, Wolfgang E. S. Unger, Raul Arenal, Christoph T. Koch, Beate Paulus, Juergen P. Rabe, Arne Thomas, Rainer Haag, Mohsen Adeli
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2020)
Article
Chemistry, Multidisciplinary
Jose Luis Cuellar-Camacho, Sumati Bhatia, Valentin Reiter-Scherer, Daniel Lauster, Susanne Liese, Juergen P. Rabe, Andreas Herrmann, Rainer Haag
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2020)
Article
Chemistry, Multidisciplinary
Hu Lin, Jose D. Cojal Gonzalez, Nikolai Severin, Igor M. Sokolov, Juergen P. Rabe
Article
Chemistry, Multidisciplinary
Ehsan Mohammadifar, Vahid Ahmadi, Mohammad Fardin Gholami, Alexander Oehrl, Oleksandr Kolyvushko, Chuanxiong Nie, Ievgen S. Donskyi, Svenja Herziger, Joerg Radnik, Kai Ludwig, Christoph Boettcher, Jurgen P. Rabe, Klaus Osterrieder, Walid Azab, Rainer Haag, Mohsen Adeli
Summary: In this study, biocompatible polyglycerol units are crosslinked in two dimensions using a graphene-assisted strategy to produce highly functional and water-soluble polyglycerol nanosheets. Compared to their 3D counterparts, these 2D polyglycerols exhibit stronger virus inhibition, suggesting their superiority in biomedicine and bioengineering applications.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Abdul Rauf, Jose D. Cojal Gonzalez, Alper Balkan, Nikolai Severin, Igor M. Sokolov, Juergen P. Rabe
Summary: The wetting behavior of water and ethanol on interfaces between different materials varies, with water forming labyrinthine structures and ethanol forming compact morphologies. This morphology is determined by the characteristics of the materials and the interactions between molecules.
Biographical-Item
Chemistry, Physical
Martin Schoen, Robert Evans, Keith E. Gubbins, Juergen P. Rabe, Matthias Thommes, George Jackson
Letter
Clinical Neurology
Thomas Picht, Maxime Le Calve, Rosario Tomasello, Lucius Fekonja, Mohammad Fardin Gholami, Matthias Bruhn, Carola Zwick, Juergen P. Rabe, Claudia Mueller-Birn, Peter Vajkoczy, Igor M. Sauer, Stefan Zachow, John A. Nyakatura, Patricia Ribault, Friedemann Pulvermueller
Article
Chemistry, Physical
Bita Rezania, Ana M. Valencia, Jose D. Cojal Gonzalez, Nikolai Severin, Caterina Cocchi, Juergen P. Rabe
Summary: In this study, we investigated the structural changes of confined rhodamine 6G dye molecules at the graphene-mica interface induced by interfacial electric fields exceeding 10^9 V/m using Raman spectroscopy and atomistic simulations. We found that the observed softening of Raman-active modes is caused by mechanical deformations within the confined molecules and the action of the high interfacial electric fields. Our findings contribute to the understanding of the role of interfacial electric fields in molecule/solid interfaces and offer new perspectives for controlling catalytic activities of complex systems.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Jose D. Cojal Gonzalez, Masahiko Iyoda, Jurgen P. Rabe
Summary: Macrocyclic oligothiophenes and their pi-expanded derivatives have versatile properties that make them suitable for designing active interfaces. This study demonstrates the isomerization of a 2D crystal through resonant tunneling effect, showing the potential of these molecules for (supra)molecular engineering.
Article
Chemistry, Multidisciplinary
Hu Lin, Lala Habibova, Abdul Rauf, Jose D. Cojal Gonzalez, Nikolai Severin, Stefan Kirstein, Igor M. Sokolov, Jurgen P. Rabe
Summary: Investigating the lubricities of water films on the nanometer scale, it was found that D2O films are more lubricant than H2O films, which may be related to the selective permeation of protons and deuterons in graphene.
Article
Chemistry, Physical
Hu Lin, Artem Iakunkov, Nikolai Severin, Alexandr V. Talyzin, Juergen P. Rabe
Summary: This study uses atomic force microscopy (AFM) to investigate the swelling of bilayer graphene oxide (GO) flakes in water and ethanol vapors. The results show that swelling can be used as an indicator of rapid aging of bilayered HGO, and that AFM can detect hole defects in GO sheets. Furthermore, the swelling behavior of bilayered GO depends on the storage conditions and material type.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Filippo Giovanni Fabozzi, Nikolai Severin, Jurgen P. Rabe, Stefan Hecht
Summary: In this study, the on-surface polymerization of a vinylene-linked single-layer two-dimensional covalent organic framework using reversible Knoevenagel polycondensation under solvothermal conditions was described. The self-assembly of monomer building blocks at the solid-liquid interface led to the formation of extended covalent networks at room temperature without the need for additional catalysts or reagents. This approach provides a new pathway for the synthesis of extended conjugated 2D polymers under mild conditions.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Physics, Multidisciplinary
N. Severin, A. R. Dzhanoev, H. Lin, A. Rauf, S. Kirstein, C. -A. Palma, I. M. Sokolov, J. P. Rabe
Summary: In this study, we demonstrated that conventional tapping mode atomic force microscopy with high cantilever eigenmodes and subnanometer amplitudes can achieve routine atomic imaging at atmospheric pressures. The combination of high effective spring constants and high flexibility of the cantilever enhances imaging stability and allows for atomic imaging of solid surfaces in gaseous environments and at elevated temperatures.
PHYSICAL REVIEW RESEARCH
(2022)
