Ultrahigh‐vacuum sample transfer device with low‐temperature capability

1984 ◽  
Vol 55 (9) ◽  
pp. 1492-1494 ◽  
Author(s):  
N. J. DiNardo ◽  
J. E. Demuth ◽  
W. A. Thompson ◽  
P. G. Ledermann
Keyword(s):  
Low Temperature ◽  
Ultrahigh Vacuum ◽  
Temperature Capability ◽  
Sample Transfer ◽  
Transfer Device

Ultrahigh vacuum sample transfer device with broad temperature range

1989 ◽  
Vol 60 (6) ◽  
pp. 1167-1168 ◽  
Author(s):  
H.‐J. Drouhin ◽  
M. Picard ◽  
D. Paget
Keyword(s):  
Ultrahigh Vacuum ◽  
Broad Temperature Range ◽  
Temperature Range ◽  
Sample Transfer ◽  
Transfer Device

High-Vacuum Evaporation and a Cryostage to Observe Fractured Yeast

1988 ◽  
Vol 46 ◽  
pp. 256-257
Author(s):  
William P. Wergin ◽  
Eric F. Erbe ◽  
Eugene L. Vigil
Keyword(s):  
Electron Microscope ◽  
Low Temperature ◽  
Standard Specimen ◽  
High Vacuum ◽  
Specimen Holder ◽  
Sputter Coating ◽  
Fresh Frozen ◽  
Gain Access ◽  
Scanning Electron ◽  
Transfer Device

Investigators have long realized the potential advantages of using a low temperature (LT) stage to examine fresh, frozen specimens in a scanning electron microscope (SEM). However, long working distances (W.D.), thick sputter coatings and surface contamination have prevented LTSEM from achieving results comparable to those from TEM freeze etch. To improve results, we recently modified techniques that involve a Hitachi S570 SEM, an Emscope SP2000 Sputter Cryo System and a Denton freeze etch unit. Because investigators have frequently utilized the fractured E face of the plasmalemma of yeast, this tissue was selected as a standard for comparison in the present study.In place of a standard specimen holder, a modified rivet was used to achieve a shorter W.D. (1 to -2 mm) and to gain access to the upper detector. However, the additional height afforded by the rivet, precluded use of the standard shroud on the Emscope specimen transfer device. Consequently, the sample became heavily contaminated (Fig. 1). A removable shroud was devised and used to reduce contamination (Fig. 2), but the specimen lacked clean fractured edges. This result suggested that low vacuum sputter coating was also limiting resolution.

Multiple-fracturing and viewing of the same frozen sample at different depths using a low temperature FESEM

1996 ◽  
Vol 54 ◽  
pp. 820-821
Author(s):  
M.V. Parthasarathy ◽  
C. Daugherty
Keyword(s):  
Temperature Field ◽  
Low Temperature ◽  
Field Emission ◽  
Multiple Fracture ◽  
Precise Control ◽  
Cold Stage ◽  
Different Depths ◽  
Transfer Device

The versatility of Low Temperature Field Emission SEM (LTFESEM) for viewing frozen-hydrated biological specimens, and the high resolutions that can be obtained with such instruments have been well documented. Studies done with LTFESEM have been usually limited to the viewing of small organisms, organs, cells, and organelles, or viewing such specimens after fracturing them.We use a Hitachi 4500 FESEM equipped with a recently developed BAL-TEC SCE 020 cryopreparation/transfer device for our LTFESEM studies. The SCE 020 is similar in design to the older SCU 020 except that instead of having a dedicated stage, the SCE 020 has a detachable cold stage that mounts on to the FESEM stage when needed. Since the SCE 020 has a precisely controlled lock manipulator for transferring the specimen table from the cryopreparation chamber to the cold stage in the FESEM, and also has a motor driven microtome for precise control of specimen fracture, we have explored the feasibility of using the LTFESEM for multiple-fracture studies of the same sample.

scholarly journals Development of a Portable Ultrahigh-Vacuum Sample Transfer Vessel and Its Application

2017 ◽  
Vol 60 (4) ◽  
pp. 139-141 ◽  
Author(s):  
Eiichi KOBAYASHI ◽  
Shukichi TANAKA ◽  
Toshihiro OKAJIMA
Keyword(s):  
Ultrahigh Vacuum ◽  
Sample Transfer ◽  
Transfer Vessel

Low-Temperature Epitaxial Growth of Silicon and Silicon-Germanium Alloy by Ultrahigh-Vacuum Chemical Vapor Deposition

1994 ◽  
Vol 33 (Part 1, No.1A) ◽  
pp. 240-246 ◽  
Author(s):  
Tz-Guei Jung ◽  
Chun-Yen Chang ◽  
Ting-Chang Chang ◽  
Horng-Chih Lin ◽  
Tom Wang ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Low Temperature ◽  
Epitaxial Growth ◽  
Vapor Deposition ◽  
Silicon Germanium ◽  
Ultrahigh Vacuum ◽  
Chemical Vapor ◽  
Germanium Alloy

Low temperature ultrahigh vacuum noncontact atomic force microscope in the pendulum geometry

2011 ◽  
Vol 82 (2) ◽  
pp. 023705 ◽  
Author(s):  
U. Gysin ◽  
S. Rast ◽  
M. Kisiel ◽  
C. Werle ◽  
E. Meyer
Keyword(s):  
Low Temperature ◽  
Atomic Force Microscope ◽  
Ultrahigh Vacuum ◽  
Atomic Force

A scanner for an ultrahigh-vacuum low-temperature scanning tunneling microscope

2007 ◽  
Vol 50 (3) ◽  
pp. 422-423
Author(s):  
B. A. Loginov ◽  
K. N. El’tsov ◽  
S. V. Zaitsev-Zotov ◽  
A. N. Klimov ◽  
V. M. Shevlyuga
Keyword(s):  
Low Temperature ◽  
Scanning Tunneling Microscope ◽  
Ultrahigh Vacuum ◽  
Scanning Tunneling ◽  
Tunneling Microscope ◽  
Temperature Scanning

High Temperature Lithium Alloy Cells With Improved Low Temperature Performance

2010 ◽  
Vol 2010 (HITEC) ◽  
pp. 000274-000279
Author(s):  
Arden P. Johnson ◽  
Cuiyang Wang ◽  
John S. Miller
Keyword(s):  
Low Temperature ◽  
Rate Capability ◽  
Cell Types ◽  
Chloride Cells ◽  
Ambient Temperatures ◽  
Lithium Alloy ◽  
Temperature Performance ◽  
Temperature Capability ◽  
Low Temperature Performance ◽  
Temperature Rate

Lithium-thionyl chloride cells are widely used in downhole applications where the temperatures exceed 100°C. These cells cannot be used above the melting point of lithium, 180°C, but modified oxyhalide cells are available that use higher-melting lithium alloy anodes that allow safe operation at temperatures as high as 200°C. However, the higher temperature capability comes at the cost of low temperature performance; the alloy cells typically show very poor rate capability below 50°C. The low temperature rate limitations can be particularly disadvantageous in cases where a tool is started up at the surface, where the ambient temperatures are cooler, before it is placed into operation downhole. Here we present test results defining and characterizing the capabilities and limitations of various types of lithium alloy cells at lower temperatures, as well as discharge results at higher temperatures for new cell types that have been designed for improved rate capability at both lower and higher temperatures.

Sign in / Sign up

Export Citation Format

Share Document