Helmholtz Coils with Integrated Channels for NMR Spectroscopy[EPFL]

mt7344

ABSTRACT
* ]6 Q) P# K4 v. ~6 h" w( nA new technology for the microfabrication of Helmholtz
microcoils with integrated SU-8 channels for NMR
0 l4 |/ @! f" F8 ~) ^6 e( kspectroscopy is presented.
0 R. D6 G& \" k" D# B- LThese Helmholtz microcoils demonstrate superior NMR
/ o8 ]4 [7 p) C6 [8 g2 nperformance regarding spin excitation uniformity compared
( D0 w; P, `' }6 P9 lto planar microcoils. The improved spin excitation
+ p& e0 F$ S2 Buniformity opens the way to advanced chemical analysis
3 R& |' ?- U# r6 t# D$ w9 M0 {using complex RF-pulse sequences.
. C$ [# F/ J8 G' o  m4 C- B2 @5 RThe fabricated Helmholtz coils have Q-factor greater than
20 due to electroplated coil turns and vias, which connect the
$ _3 R) G$ M# Rupper and lower turns. The laminated SU-8 microchannel
technology allows the implementation of further fluidic
8 h, n7 P) c, h5 u: bfunctions. Analyzing living cells, mechanical filters can be
5 g( x( }; R& X9 L2 vintegrated for sample concentration and enhanced detection.


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1 D+ Y9 L" a4 ]* p$ g# j+ D[ 本帖最後由 mt7344 於 2007-6-7 10:15 PM 編輯 ]