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    1. Friedrich-Alexander-Universität
    2. Naturwissenschaftliche Fakultät
    3. Department Chemie und Pharmazie

    Department of Chemistry and Pharmacy

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    2. CTFM Chair
    3. Bachmann group research

    Bachmann group research

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    Bachmann group research

    Research topics

    We develop chemical interface engineering methods for green energy conversion applications

    Energy conversion between its light, electrical, and chemical forms always entails the transfer of charge carriers at interfaces as the crucial step. Here, “the interface is the device” — in stark contrast to the bulk amounts of materials traditionally utilized in classical energy conversion devices. Therefore, smart engineering of interfaces enables one to minimize the utilization of expensive, highly purified, rare, or toxic materials. In fact, we contend that we can even replace those materials with inexpensive, abundant, innocuous ones using a combination of interface nanostructuring (on the scale of 20 to 5000 nm) and interface functionalization by ultrathin coatings (on the scale of 0.5 to 50 nm). To achieve the level of control required, we develop chemical nanostructuring methods based mostly on atomic layer deposition (ALD) and electrochemistry. We then implement them towards devices, the functional performance of which depends on the degree of perfection achieved preparatively.

    Photonic solar cells built on ordered arrays of nanospheres
    Micrograph and photographs: Büttner, Döhler, Mínguez Bacho

    Surface chemistry and preparative methods

    Atomic-layer additive manufacturing
    Sketch: Bachmann

    We develop molecular surface chemistry towards novel atomic layer deposition (ALD) reactions and processes, we combine it with electrochemical techniques to create original, complex nanostructures with well-defined geometry and tunable structural parameters.

    Adv. Mater. Interfaces 2023, 2300436
    Small 2023, 2301774
    RSC Advances 2023, 13, 4011-4018
    Chem. Mater. 2022, 34, 9836-9843
    Chem. Mater. 2022, 34, 9392-9401
    Small Methods 2022, 2101546
    Small Methods 2021, 2101296
    Dalton Trans. 2021, 50, 13066
    Chem. Commun. 2021, 57, 4654-4657
    Adv. Mater. Interfaces 2020, 7, 2001493

    Pt/Ir nanotubes
    Micrograph: Licklederer

    J. Mater. Chem. A 2019 ,7, 25112-25119
    Nanoscale 2018, 10, 8385-8390
    ACS Omega 2018, 3, 2602-2608
    ECS J. Solid State Sci. Technol.2017, 6, N171-N175
    Langmuir 2017, 33, 8289-8294
    Nano Lett.2015, 15, 6379-6385
    Rev. Sci. Instrum.
    2015, 86, 073902

     

    Support geometry in electrocatalysis and catalysis

    ChemElectroChem 2018 issue 9 cover
    ChemElectroChem cover (RSC)

    We investigate systematically how increases in the specific surface area of a nanoporous electrode or porous catalyst support are reflected in the substrate turnover.

    ChemCatChem 2024, e202401429
    Chem. Methods 2023, e202300019
    Electrochim. Acta 2022, 417, 140308
    Int. J. Hydrogen Energy 2021, 46, 38972-38982
    Electrochim. Acta 2021, 389, 138716
    RSC Adv. 2021, 11, 17985-17992
    Sust. Energy & Fuels 2021, 5, 478-485
    Nanoscale Adv. 2020, 2, 1417-1426
    ACS Appl. Energy Mater. 2019, 2, 2344-2349
    Adv. Mater. Interfaces 2018, 1801432
    ChemElectroChem 2018, 5, 1259-1264
    ChemSusChem
    2017, 10, 3644-3651
    Nanotechnol. 2017, 28, 065405
    J. Mater. Chem. A 2016, 4, 6487-6494
    ChemSusChem 2016, 9, 1424-1432
    ChemCatChem 2015, 7, 2455-2459
    Dalton Trans. 2014, 43, 4345-4350

    Photovoltaics

    Ignacio's ETA solar cell cross-section
    Micrograph: Minguez Bacho

    We study how the efficiency of ‘extremely thin absorber’ (ETA) solar cells is affected by the thickness of the light absorbing layer and the other geometric parameters of the nanostructured semiconductor junction.

    ACS Appl. Mater. Interfaces 2024, 16, 13903–13913
    Nano Energy 2022, 2022, 107820
    ACS Appl. Energy Mater. 2022, 5, 11977-11986
    Nano Energy 2021, 89, 106373
    J. Phys. Chem. C 2021, 125, 18429-18437
    Small 2021, 2100487
    ACS Appl. Mater. Interf. 2021, 13, 11861-11868
    RSC Adv. 2020, 10, 28225-28231
    ACS Appl. Energy Mater. 2019,, 2, 8747-8746
    J. Mater. Chem. A
    2015, 3, 5971-5981
    Energy Environ. Sci.
    2013, 6, 67-71

    Magnetism

    Research Prof. Dr. Bachmann (Image: Julien Bachmann)
    Image: Bochmann

    We create ordered arrays of elongated magnetic nanostructures for data storage application. By introducing structural irregularities along the axis of the structures, we aim to be able to store, read and write many bits of information per object.

    J. Phys. Chem. C 2023, 127, 2387-2397
    Appl. Phys. Lett.2021, 118, 172411
    Phys. Rev. B
    2021, 103, 054430
    Phys. Rev. Lett. 2019, 123, 217201
    Appl. Phys. Lett.
    2018, 112, 242403
    RSC Advances 2017, 7, 37627-37635
    Phys. Rev. B 2015, 92, 144428

    Battery materials

    SnO2 nanotube electrde
    Nanoscale Advances cover (RSC)

    We apply our nanostructuring methods to the generation of lithium ion battery materials in which short ion transport distances within the solid and a high degree of porosity allow for fast charge and discharge, non-destructive volume changes, and high durability.

    Electrochim. Acta 2021, 388, 138522
    Nanoscale Adv. 2020, 2, 1417-1426
    Powder Technol. 2020, 363, 218-231
    Adv. Powder Technol. 2019, 30, 3127-3134

     

    Friedrich Alexander University Erlangen-Nürnberg
    Department of Chemistry and Pharmacy

    Nikolaus-Fiebiger-Str. 10
    91058 Erlangen
    Germany
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