[11p-W934-1~8] 先端イオン顕微鏡技術のナノスケール材料・デバイスへの展開

▲ [11p-W934-8] Electron microscopy of samples in liquid and ice, and correlated Helium ion microscopy

〇Chikara Sato¹、Mari Sato¹、Shinichi Ogawa² (1.AIST bmd、2.AIST neri)

キーワード：cryo electronmicroscopy, Atmospheric scanning electron microscopy, Helium ion microscopy

We have directly observed cells and target molecules in hydrophilic conditions, by using a cryo-TEM and SEM. By using cryo-TEM, we have determined the conformation of receptors and ion channels in thin ice under vacuum. For the observation in water, SEM system was improved to develop the atomospheric SEM (ASEM). ASEM allows us to observe samples within 2-3 μm in depth. The resolution near SiN film was 8 nm. We directly observed fixed cells and tissues in aqueous liquid by ASEM, and performed correlative electron-helium ion microscopy of gold labeled cells in vacuum using high resolution Helium ion microscope. Membrane raft and cytoskeletons were successfully observed. We are aiming further understandings of targets using correlative electron-helium ion microscopies.