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Untuned broadband spiral micro-coils achieve sensitive multi-nuclear NMR TX/RX from microfluidic samples

Davoodi, Hossein; Nordin, Nurdiana; Munakata, Hirokazu; Korvink, Jan G.; MacKinnon, Neil; Badilita, Vlad

Abstract (englisch):
The low frequency plateau in the frequency response of an untuned micro-resonator permits broadband radio-frequency reception, albeit at the expense of optimal signal-to-noise ratio for a particular nucleus. In this contribution we determine useful figures of merit for broadband micro-coils, and thereby explore the parametric design space towards acceptable simultaneous excitation and reception of a microfluidic sample over a wide frequency band ranging from $^{13l}$C to $^{1}$H, i.e., 125–500 MHz in an 11.74 T magnet. The detector achieves 37% of the performance of a comparably sized, tuned and matched resonator, and a linewidth of 17 ppb using standard magnet shims. The use of broadband detectors circumvents numerous difficulties introduced by multi-resonant RF detector circuits, including sample loading effects on matching, channel isolation, and field distortion.


Verlagsausgabe §
DOI: 10.5445/IR/1000131255
Veröffentlicht am 08.04.2021
Originalveröffentlichung
DOI: 10.1038/s41598-021-87247-2
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Mikrostrukturtechnik (IMT)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 12.2021
Sprache Englisch
Identifikator ISSN: 2045-2322
KITopen-ID: 1000131255
HGF-Programm 43.35.01 (POF IV, LK 01) Platform for Correlative, In Situ & Operando Charakterizat.
Erschienen in Scientific reports
Verlag Nature Research
Band 11
Heft 1
Seiten Art.-Nr.: 7798
Vorab online veröffentlicht am 08.04.2021
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