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SUMMARY:Unusual NMR experiments using home-made and open-resource systems 
 - Dr. Kazuyuki Takeda\, 
DTSTART:20160616T130000Z
DTEND:20160616T140000Z
UID:TALK66476@talks.cam.ac.uk
CONTACT:Sharon Connor
DESCRIPTION:An open-design NMR spectrometer is described. Its role is to c
 omplement the state-of-art commercial NMR systems\, to support one to expl
 ore new frontiers in NMR spectroscopy. The design policy is to leave all t
 he digital jobs required for an NMR spectrometer to a single field-program
 mable gate-array (FPGA) chip. Since the hardware modules built inside the 
 FPGA are called "core" modules\, and since their source codes are "open" t
 o public\, the spectrometer was named as the OPENCORE NMR spectrometer[1-3
 ].\n\nThe spectrometer is equipped with three equivalent transmitter chann
 els\, each of which is capable of modulating amplitude\, phase\, and frequ
 ency of radio-frequency signals. In our laboratory\, we operate all our so
 lid-state NMR systems using the OPENCORE NMR spectrometers.\n\nIn addition
  to performing established sequences\, we put our effort on developing NMR
  methodologies to expand the applicability of NMR spectroscopy. Examples i
 nclude NMR elemental analysis[4]\, dynamic receiver-gain modulation[5]\, c
 ovariance spectroscopy extended to heteronuclear spin systems[6]\, double-
 nutation irradiation[7]\, in-situ 7Li NMR of batteries[8]\, continuous-wav
 e NMR\, X-band frequency up-conversion for ESR\, and so on. The OPENCORE N
 MR spectrometer can also serve for MRI experiments with an optional field-
 gradient waveform generator. Since the spectrometer happens to be compact\
 , one can carry it outside the laboratory. NMR experiments have been demon
 strated in a classroom and at home using a permanent magnet for educationa
 l and hobby purposes.\n\nEven though the price for the parts is low\, it w
 ould be fair to mention the non-financial cost. That is\, one is required 
 to have some knowledge and skill in electronics\, and perhaps\, patience\,
  to build a spectrometer and make it operational. Hopefully\, the OPENCORE
  NMR project could inspire those who are trying to start something new. In
 deed\, we have begun to explore the possibility of applying opto-electro-m
 echanics[9] to NMR.\n\n[1] K. Takeda\, Rev. Sci. Instrum. 78 (2007) 033103
 .\n[2] K. Takeda\, J. Magn. Reson. 192 (2008) 218.\n[3] K. Takeda\, Annual
  Reports on NMR Spectroscopy 74 (2011) 355.\n[4] K. Takeda\, N. Ichijo\, Y
 . Noda\, K. Takegoshi\, J. Magn. Reson. 224 (2012) 48.\n[5] K. Takeda\, K.
  Takegoshi\, J. Magn. Reson. 208 (2011) 305.\n[6] K. Takeda\, Y. Kusakabe\
 , Y. Noda\, M. Fukuchi\, K. Takegoshi\, Phys. Chem. Chem. Phys. 14 (2012) 
 9715.\n[7] K. Takeda\, A. Wakisaka\, K. Takegoshi\, J. Chem. Phys. 141 (20
 14) 224202.\n[8] J. Arai\, Y. Okada\, T. Sugiyama\, M. Izuka\, K. Gotoh\, 
 K. Takeda\, J. Electrochem. Soc. 162 (2015) A952.\n[9] T. Bagci\, A. Simon
 sen\, S. Schmid\, L.G. Villanueva\, E. Zeuthen\, J. Appel\, J.M. Taylor\, 
 A. Sørensen\, K. Usami\, A. Schliesser\, E.S. Polzik\, Nature 507 (2014) 
 81.\n\n
LOCATION:Unilever Lecture Theatre\,  Department of Chemistry
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