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{1489}
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ref: -0 tags: surface plasmon resonance voltage sensing antennas PEDOT imaging spectroscopy date: 12-05-2019 16:47 gmt revision:1 [0] [head]

Electro-plasmonic nanoantenna: A nonfluorescent optical probe for ultrasensitive label-free detection of electrophysiological signals

  • Use spectroscopy to measure extracellular voltage, via plasmon concentrated electrochromic effects in doped PEDOT.

{1347}
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ref: -0 tags: laser induced breakdown spectroscopy for surgery tissue differentiation date: 09-22-2016 19:26 gmt revision:0 [head]

PMID-25426327 Laser induced breakdown spectroscopy for bone and cartilage differentiation - ex vivo study as a prospect for a laser surgery feedback mechanism.

  • Mehari F1, Rohde M2, Knipfer C2, Kanawade R1, Klämpfl F1, Adler W3, Stelzle F4, Schmidt M1.
  • Tested on pig ear cartilage & cortical bone.
  • 532nm, Q-switched, flashlamp-pumped Nd:YAG, 80mJ pulse energy, 10ns, 1Hz.
  • Commercial spectrogram; light collected with 50um fiber optic connector.
    • We could probably put this in line with the laser mirrors, probably..
  • Super clean results: see any of the figures.
    • AUC = 1.00 !!

{1273}
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ref: -0 tags: spectroscopy frequency domain PMT avalanche diode laser Tufts date: 02-25-2014 19:02 gmt revision:0 [head]

Frequency-domain techniques for tissue spectroscopy and imaging

  • 52 pages, book chapter
  • Good detail on bandwidth, tissue absorption, various technologies.

{1219}
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ref: Williams-2007.12 tags: electrode impedance spectroscopy histology date: 01-28-2013 19:12 gmt revision:3 [2] [1] [0] [head]

PMID-18057508[0] Complex impedance spectroscopy for monitoring tissue responses to inserted neural implants.

  • In general, impedance magnitude at 1 kHz was significantly increased in extensive reactions, starting about 4 days post-implant
    • Impedance is hence predictive of performance.
  • Electrodes with extensive reactions also displayed impedance spectra with a characteristic change at high frequencies. This change was manifested in the formation of a semi-circular arc in the Nyquist space, suggestive of increased cellular density in close proximity to the electrode site.
    • Interesting! Usefull!

____References____

[0] Williams JC, Hippensteel JA, Dilgen J, Shain W, Kipke DR, Complex impedance spectroscopy for monitoring tissue responses to inserted neural implants.J Neural Eng 4:4, 410-23 (2007 Dec)