Surface-enhanced IR absorption spectroscopy of the KcsA potassium channel upon application of an electric field

2015 ◽  
Vol 17 (33) ◽  
pp. 21104-21111 ◽  
Author(s):  
Akira Yamakata ◽  
Hirofumi Shimizu ◽  
Shigetoshi Oiki
Keyword(s):  
Structural Change ◽  
Electric Field ◽  
Potassium Channel ◽  
Absorption Spectroscopy ◽  
Ir Absorption ◽  
Electrochemical System ◽  
Surface Enhanced ◽  
Kcsa Potassium Channel

Surface-enhanced IR absorption spectroscopy coupled with an electrochemical system enables the potassium-induced specific structural change of the potassium channel.

scholarly journals Time-Resolved Surface-Enhanced IR-Absorption Spectroscopy of Direct Electron Transfer to Cytochrome c Oxidase from R. sphaeroides

2013 ◽  
Vol 105 (12) ◽  
pp. 2706-2713 ◽  
Author(s):  
Andreas Schwaighofer ◽  
Christoph Steininger ◽  
David M. Hildenbrandt ◽  
Johannes Srajer ◽  
Christoph Nowak ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Cytochrome C ◽  
Cytochrome C Oxidase ◽  
Absorption Spectroscopy ◽  
Direct Electron Transfer ◽  
Ir Absorption ◽  
Time Resolved ◽  
Surface Enhanced

Study of Surface-Enhanced IR Absorption Spectroscopy over Evaporated Au Films in an Ultrahigh Vacuum System

1997 ◽  
Vol 51 (8) ◽  
pp. 1170-1175 ◽  
Author(s):  
Shinri Sato ◽  
Toshihiro Suzuki
Keyword(s):  
Heat Treatment ◽  
Absorption Spectroscopy ◽  
Ultrahigh Vacuum ◽  
Vacuum System ◽  
Ir Absorption ◽  
Transmission Spectra ◽  
Close Vicinity ◽  
Surface Enhanced ◽  
Ir Transmission ◽  
Sapphire Plate

IR transmission spectra were measured in an ultrahigh vacuum system for Fe(CO)5, n-decane, and NH3 adsorbed at <150 K on transparent Au films evaporated on a sapphire plate. The spectra of Fe(CO)5 show ∼10-fold enhancement as compared to those observed on an SiO2 lm coated on a sapphire plate, which has been reported as surface-enhanced IR-absorption (SEIRA). The enhancement is reduced when the coverage of adsorbate exceeds a mono-layer or other molecules present on the surface prior to adsorption, indicating that SEIRA is effective only in the close vicinity of the surface. The SEIRA effect is also reduced when film is heated in a vacuum, probably because of sintering of the Au particles forming the film. In addition, the heat treatment of the film results in blue shifts of bands, accompanied by some band distortion. With the use of SEIRAS, the surface photochemistry of Fe(CO)5 has been investigated.

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