Nanomanipulaatioon ja elektronimikroskopiaan perustuva hiilinanoputkien käsittelymenetelmä
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Imaging connected porosity of crystalline rock by contrast agent-aided X-ray microtomography and scanning electron microscopy
Kuva, Jukka; Sammaljärvi, J.; Parkkonen, Joni; Siitari-Kauppi, M.; Lehtonen, M.; Turpeinen, T.; Timonen, Jussi; Voutilainen, M. (Wiley-Blackwell Publishing Ltd., 2018)We set out to study connected porosity of crystalline rock using X‐ray microtomography and scanning electron microscopy with energy dispersive X‐ray spectroscopy (SEM‐EDS) with caesium chloride as a contrast agent. Caesium ... -
Electron microscopy of gold nanoparticles at atomic resolution
Azubel, Maia; Koivisto, Jaakko; Malola, Sami; Bushnell, David; Hura, Greg L.; Koh, Ai Leen; Tsunoyama, Hironori; Tsukuda, Tatsuya; Pettersson, Mika; Häkkinen, Hannu; Kornberg, Roger D. (American Association for the Advancement of Science, 2014)Structure determination of gold nanoparticles (AuNPs) is necessary for understanding their physical and chemical properties, but only one AuNP larger than 1 nanometer in diameter [a 102–gold atom NP (Au102NP)] has been ... -
Chemically Selective Imaging of Individual Bonds through Scanning Electron Energy-Loss Spectroscopy : Disulfide Bridges Linking Gold Nanoclusters
Sokołowska, Karolina; Luan, Zhongyue; Hulkko, Eero; Rameshan, Christoph; Barrabés, Noelia; Apkarian, Vartkess A.; Lahtinen, Tanja (American Chemical Society, 2020)As proof-of-principle of chemically selective, spatially resolved imaging of individual bonds, we carry out electron energy-loss spectroscopy in a scanning transmission electron microscopy instrument on atomically precise, ... -
Characterization of spatial porosity and mineral distribution of crystalline rock using X-ray micro computed tomography, C-14-PMMA autoradiography and scanning electron microscopy
Voutilainen, Mikko; Miettinen, Arttu; Sardini, Paul; Parkkonen, Joni; Sammaljärvi, Juuso; Gylling, Björn; Selroos, Jan-Olof; Yli-Kaila, Maarit; Koskinen, Lasse; Siitari-Kauppi, Marja (Pergamon, 2019)The spatial porosity and mineral distribution of geological materials strongly affects transport processes in them. X-ray micro computed tomography (X-μCT) has proven to be a powerful tool for characterizing the spatial ...