High-Resolution Electronic Spectroscopy of the BODIPY Chromophore in Supersonic Beam and Superfluid Helium Droplets

ChemPhysChem ◽  
2011 ◽  
Vol 12 (10) ◽  
pp. 1969-1980 ◽  
Author(s):  
Anja Stromeck-Faderl ◽  
Dominik Pentlehner ◽  
Uwe Kensy ◽  
Bernhard Dick
Keyword(s):  
High Resolution ◽  
Superfluid Helium ◽  
Electronic Spectroscopy ◽  
Helium Droplets

High-Resolution Cryo-Electron Microscopy of Biological Macromolecules

1990 ◽  
Vol 48 (1) ◽  
pp. 126-127
Author(s):  
Yoshinori Fujiyoshi
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
Diffraction Pattern ◽  
Superfluid Helium ◽  
Copper Phthalocyanine ◽  
Optical Diffraction ◽  
Irradiation Damage ◽  
Biological Macromolecules ◽  
Cross Sectional ◽  
Instrumental Resolution

The resolution of direct images of biological macromolecules is normally restricted to far less than 0.3 nm. This is not due instrumental resolution, but irradiation damage. The damage to biological macromolecules may expect to be reduced when they are cooled to a very low temperature. We started to develop a new cryo-stage for a high resolution electron microscopy in 1983, and successfully constructed a superfluid helium stage for a 400 kV microscope by 1986, whereby chlorinated copper-phthalocyanine could be photographed to a resolution of 0.26 nm at a stage temperature of 1.5 K. We are continuing to develop the cryo-microscope and have developed a cryo-microscope equipped with a superfluid helium stage and new cryo-transfer device.The New cryo-microscope achieves not only improved resolution but also increased operational ease. The construction of the new super-fluid helium stage is shown in Fig. 1, where the cross sectional structure is shown parallel to an electron beam path. The capacities of LN2 tank, LHe tank and the pot are 1400 ml, 1200 ml and 3 ml, respectively. Their surfaces are placed with gold to minimize thermal radiation. Consumption rates of liquid nitrogen and liquid helium are 170 ml/hour and 140 ml/hour, respectively. The working time of this stage is more than 7 hours starting from full LN2 and LHe tanks. Instrumental resolution of our cryo-stage cooled to 4.2 K was confirmed to be 0.20 nm by an optical diffraction pattern from the image of a chlorinated copper-phthalocyanine crystal. The image and the optical diffraction pattern are shown in Fig. 2 a, b, respectively.

The identification of In2O in the gas phase by high resolution electronic spectroscopy

1997 ◽  
Vol 107 (11) ◽  
pp. 4439-4442 ◽  
Author(s):  
Nicholas M. Lakin ◽  
Ger van den Hoek ◽  
Ian R. Beattie ◽  
John M. Brown
Keyword(s):  
High Resolution ◽  
Gas Phase ◽  
Electronic Spectroscopy

Faraday communications. High-resolution electronic spectroscopy and predissociation dynamics of SiH + 2 in high-K a states

1993 ◽  
Vol 89 (1) ◽  
pp. 177 ◽  
Author(s):  
David I. Hall ◽  
Andrew P. Levick ◽  
Peter J. Sarre ◽  
Christopher J. Whitham ◽  
Alexander Alijah ◽  
...  
Keyword(s):  
High Resolution ◽  
Electronic Spectroscopy ◽  
High K

scholarly journals Electron diffraction of CS2 nanoclusters embedded in superfluid helium droplets

2020 ◽  
Vol 152 (22) ◽  
pp. 224306
Author(s):  
Jie Zhang ◽  
Stephen D. Bradford ◽  
Wei Kong ◽  
Chengzhu Zhang ◽  
Lan Xue
Keyword(s):  
Electron Diffraction ◽  
Superfluid Helium ◽  
Helium Droplets

scholarly journals Production of cold molecular ions in superfluid helium droplets

2020 ◽  
Vol 1412 ◽  
pp. 232010
Author(s):  
A Iguchi ◽  
H Otani ◽  
S Kuma ◽  
H Tanuma ◽  
T Azuma
Keyword(s):  
Superfluid Helium ◽  
Molecular Ions ◽  
Helium Droplets

High resolution infrared spectroscopy of single SF6 molecules in helium droplets. I. Size effects in 4He droplets

1999 ◽  
Vol 110 (11) ◽  
pp. 5109-5123 ◽  
Author(s):  
Matthias Hartmann ◽  
Nikolas Pörtner ◽  
Boris Sartakov ◽  
J. Peter Toennies ◽  
Andrei F. Vilesov
Keyword(s):  
Infrared Spectroscopy ◽  
High Resolution ◽  
Size Effects ◽  
Helium Droplets
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