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<footnote>858M. Leppänen, L.-R. Sundberg, E. Laanto, G. M. de Freitas Almeida, P. Papponen, and I. J. Maasilta, "Imaging bacterial colonies and phage-bacterium interaction at sub-nanometer resolution using helium-ion microscopy," *Adv. Biosyst.* **1**, 1700070 (2017).</footnote>

<footnote>859A. Sharma, M. Schmidt, B. Kiesel, N. K. Mahato, L. Cralle, Y. Singh, H. H. Richnow, J. A. Gilbert, W. Arnold, and R. Lal, "Bacterial and archaeal viruses of himalayan hot springs at manikaran modulate host genomes," *Front. Microbiol.* **9**, 3095 (2018).</footnote>

<footnote>860X. You, R. Kallies, I. Kühn, M. Schmidt, H. Harms, A. Chatzinotas, and L. Y. Wick, "Phage co-transport with hyphal-riding bacteria fuels bacterial invasion in a water-unsaturated microbial model system," *ISME J.* **16**, 1275 (2021).</footnote>

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<footnote>864C. Guillierier, D. Medina Cruz, J.-N. Audinot, and T. Wirtz, "Characterization of biogenic nanoparticles via in-situ correlative secondary electron helium microscopy and secondary ion mass spectrometry," *Microsc. Microanal.* **25**, 1062–1063 (2019).</footnote>

<footnote>865P. Benettoni, H. Stryhanyuk, S. Wagner, F. Kollmer, J. H. Moreno-Osorio, T. Schmidt, M. Reemtsma, and H.-H. Richnow, *J. Anal. At. Spectrom.* **34**, 1098 (2019).</footnote>

<footnote>866M. S. Joens, C. Huynh, J. M. Kasuboski, D. C. Ferranti, Y. J. Sigal, F. Zeitvogel, M. Obst, C. J. Burkhardt, K. P. Curran, S. H. Chalasani, L. A. Stern, B. Goetze, and J. A. J. Fitzpatrick, "Helium ion microscopy (HIM) for the imaging of biological samples at sub-nanometer resolution," *Sci. Rep.* **3**, 3514 (2013).</footnote>

<footnote>867J. M. Byrne, M. Schmidt, T. Gauger, C. Bryce, and A. Kappler, "Imaging organic-mineral aggregates formed by Fe(II)-oxidizing bacteria using helium ion microscopy," *Environ. Sci. Technol. Lett.* **5**, 209–213 (2018).</footnote>

<footnote>868S.-C. Chen, N. Musat, O. J. Lechtenfeld, H. Paschke, M. Schmidt, N. Said, D. Popp, F. Calabrese, H. Stryhanyuk, U. Jaekel, Y.-G. Zhu, S. B. Joye, H.-H. Richnow, F. Widdel, and F. Musat, "Anaerobic oxidation of ethane by archaea from a marine hydrocarbon seep," *Nature* **568**, 108–111 (2019).</footnote>

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<footnote>870A. Belianinov, M. C. Halsted, M. J. Burch, K. Songkil, and S. T. Retterer, "Biofilm structure of *Geobacter sulfurreducens* by helium ion microscopy," *Microsc. Microanal.* **23**, 1152–1153 (2017).</footnote>

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