摘要:
When injection of electrons into a sample supporting member causes a potential gradient between an insulative thin film (11) and a conductive thin film (12) at a site of electron beam injection, the potential barrier of the surface of the insulative thin film (11) becomes thin, and an electron emission phenomenon is caused by tunnel effects. Secondary electrons caused in the insulative thin film (11) tunnel to the conductive thin film (12) along the potential gradient. The secondary electrons, having tunneled, reach a sample (30) while diffusing in the conductive thin film (12). In the case where the sample (30) is a sample with a high electron transmittance, such as a biological sample, the secondary electrons also tunnel through the interior of the sample (30). The secondary electrons (42) are detected to acquire an SEM image in which the inner structure of the sample (30) is reflected.
摘要:
In an upper main body (21) of a sample holder (20), a laminate of an insulative thin film (11) and a secondary electron emission protective thin film (12) is provided. An electron beam (41) emitted from an electron gun (40) enters the secondary electron emission protective thin film side. The undersurface of the insulative thin film (11) is a sample adhesion surface, where a sample (30) to be an observation target is held by adsorption or the like. The secondary electron emission protective thin film (12) is made of a material having a low secondary electron emission coefficient δ and, preferably, is non-insulative. That is, the secondary electron emission protective thin film (12) is conductive even though the electric resistance is high. Accordingly, the charge level of a site irradiated with the electron beam has a low charge level.
摘要:
Observation samples 16 in a sample solution 15 are held due to absorption or the like on the rear face of a first X-ray transmission film 14a. In a mirror body, while an X-ray emission film 13 and X-ray transmission films 14a and 14b are bent to be convex outward due to the pressure difference, an X-ray transmission film 14c is bent to be convex toward the X-ray transmission film 14a side due to gas expansion in a second cavity part 11b. This bending results in widening of a gap between the first and second X-ray transmission films 14a and 14b in the center part of these more compared with a gap between the end parts of these. However, despite the fact that lengthening of the X-ray optical path length over the primary visual field region of X-ray microscope observation arises between the X-ray transmission films 14b and 14c, there is almost no change between the X-ray transmission films 14a and 14c. Accordingly, even when the X-ray emission film and the X-ray transmission films are bent inside the mirror body, lengthening of the X-ray optical path length takes place in the second cavity part 11 b (gas portion) in which X-ray absorption does not take place, this enabling absorption of the X-rays by the sample solution 15 to be suppressed.
摘要:
A specimen supporting member (10) includes: a specimen supporting film (11) such as a silicon nitride film, a carbon film, and a polyimide film; an X-ray radiation film (13) provided on one principal surface of the specimen supporting film, and for radiating a characteristic X-ray in a soft X-ray region upon irradiation with charged particles; and a specimen adsorption film (12) which is a metal film provided on another principal surface of the specimen supporting film (11), and which fixes by adsorption a specimen (1) to be observed. Since a protein which is a constitutive substance of a biological specimen has a characteristic to easily adsorb to a metallic ion, a specimen adsorption film (12) is formed on one principal surface of the specimen supporting film (11) so that an observation specimen adsorbs thereto.
摘要:
A water solution (20) in which an observation sample (10) is, for example, dissolved is sandwiched on a first insulative thin film (203) side provided under a conductive thin film 201. When an electron beam incident part is charged minus, electric dipoles of water molecules are arrayed along a potential gradient. Electric charges are also generated on the surface of a second insulative thin film (204). The electric charges are detected by a terminal section (210) and changes to a measurement signal. In a state in which an electron beam (102) is blocked, the minus potential disappears. Consequently, the electric charges on the surface of the first insulative thin film (203) also disappear, and the measurement signal output from the terminal section (210) changes to 0.
摘要:
A water solution (20) in which an observation sample (10) is, for example, dissolved is sandwiched on a first insulative thin film (203) side provided under a conductive thin film 201. When an electron beam incident part is charged minus, electric dipoles of water molecules are arrayed along a potential gradient. Electric charges are also generated on the surface of a second insulative thin film (204). The electric charges are detected by a terminal section (210) and changes to a measurement signal. In a state in which an electron beam (102) is blocked, the minus potential disappears. Consequently, the electric charges on the surface of the first insulative thin film (203) also disappear, and the measurement signal output from the terminal section (210) changes to 0.