Aqueous flat-cells perpendicular to the electric field for use in electron paramagnetic resonance spectroscopy, II: Design

Journal of Magnetic Resonance

Volumn 172, Issue 2, 2005, Pages 333-341

  Sidabras, Jason W ^a   Mett, Richard R ^a,b   Hyde, James S ^a  

^a MEDICAL COLLEGE OF WISCONSIN   (United States)

^b MILWAUKEE SCHOOL OF ENGINEERING   (United States)

Author keywords

Aqueous samples; Dielectric loss; EPR; Finite element; Microwave cavities

Indexed keywords

AQUEOUS SAMPLES; EPR SIGNAL STRENGTH; MICROWAVE CAVITIES;

CELLS; DIELECTRIC LOSSES; ELECTRIC FIELD EFFECTS; FINITE ELEMENT METHOD; MICROWAVES; PERMITTIVITY;

ELECTRON SPIN RESONANCE SPECTROSCOPY;

POLITEF; WATER;

ARTICLE; CHEMISTRY; COMPUTER AIDED DESIGN; ELECTROMAGNETIC FIELD; ELECTRON SPIN RESONANCE; EQUIPMENT DESIGN; FINITE ELEMENT ANALYSIS; INSTRUMENTATION; MICROWAVE RADIATION; THEORETICAL MODEL;

COMPUTER-AIDED DESIGN; ELECTROMAGNETIC FIELDS; ELECTRON SPIN RESONANCE SPECTROSCOPY; EQUIPMENT DESIGN; FINITE ELEMENT ANALYSIS; MICROWAVES; MODELS, THEORETICAL; POLYTETRAFLUOROETHYLENE; WATER;

EID: 11344259082     PISSN: 10907807     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.jmr.2004.11.006     Document Type: Article

References (13)

1. J.S. Hyde A new principle for aqueous sample cells for EPR Rev. Sci. Instrum. 43 1972 629 631
2. S.S. Eaton, and G.R. Eaton Electron paramagnetic resonance sample cell for lossy samples Anal. Chem. 49 1977 1277 1278
3. R.R. Mett, and J.S. Hyde Aqueous flat cells perpendicular to the electric field for use in electron paramagnetic resonance spectroscopy J. Magn. Reson. 165 2003 137 152
4. R.R. Mett, W. Froncisz, and J.S. Hyde Axially uniform resonant cavity modes for potential us in electron paramagnetic resonance spectroscopy Rev. Sci. Instrum. 72 2001 4188 4200
5. J. Anderson, R.R. Mett, and J.S. Hyde Cavities with axially uniform field for use in electron paramagnetic resonance. II. Free space generalization Rev. Sci. Instrum. 73 2002 3027 3037
6. J. Hyde, R. Mett, and J. Anderson Cavities with axially uniform field for use in electron paramagnetic resonance. III. Re-entrant geometries Rev. Sci. Instrum. 73 2002 4003 4009
7. L.G. Stoodley The sensitivity of microwave electron spin resonance spectrometers for use with aqueous solutions J. Electron. Control 14 1963 531
8. J.S. Hyde, and R.R. Mett Aqueous sample considerations in uniform field resonators for electron paramagnetic resonance spectroscopy Curr. Top. Biophys. 26 2002 7 14
9. A. Von Hippel Dielectric Materials and Applications 1954 Artech House Boston
10. J.S. Hyde, and W. Froncisz Loop-gap resonators A.J. Hoff Advanced EPR: Applications in Biology and Biochemistry 1989 Elsevier Amsterdam 277 306
11. A coding error in Mett and Hyde [3] led to the conclusion that a closely-packed cell cluster would produce optimum tangential electric field node centering in the cells. This error is manifest in Fig. 3E of [3] and was caused by a sign error in programming. All equations and all other graphs in [3] are believed to be accurate
12. Here, we hold the resonator dimensions fixed and assume that the dielectric of the sample holder does not have a significant effect on the resonant frequency. As indicated in Table 1, the largest frequency shift caused by the Teflon sample holder is less than 1%
13. 102 cavity, a standard flat-cell in nodal orientation has 4.1 times the signal of a standard capillary of 1.1 mm diameter, neglecting the effects of the sample holder dielectrics