Measurements

Get Advanced Time-Correlated Single Photon Counting Applications PDF

Posted On April 5, 2018 at 10:17 am by / Comments Off on Get Advanced Time-Correlated Single Photon Counting Applications PDF

By Wolfgang Becker

ISBN-10: 3319149288

ISBN-13: 9783319149288

ISBN-10: 3319149296

ISBN-13: 9783319149295

This e-book is an try to bridge the space among the instrumental rules of multi-dimensional time-correlated unmarried photon counting (TCSPC) and usual purposes of the process. Written through an originator of the method and by way of sucessful clients, it covers the fundamental ideas of the approach, its interplay with optical imaging tools and its software to a variety of experimental initiatives in existence sciences and scientific research.

The e-book is usually recommended for all clients of time-resolved detection strategies in biology, bio-chemistry, spectroscopy of reside platforms, dwell mobilephone microscopy, medical imaging, spectroscopy of unmarried molecules, and different purposes that require the detection of low-level mild indications at single-photon sensitivity and picosecond time resolution.

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Extra info for Advanced Time-Correlated Single Photon Counting Applications

Sample text

6 Fluorescence decay measurement by TCSPC. Left Fluorescence decay curves of quinine sulphate for different quencher concentration. Right Fluorescence decay curves of DODCI recorded for different wavelengths 8 W. Becker Fig. 7 Fluorescence anisotropy measurement. The fluorescence of a sample was measured at polarisation angles of 0° and 90° to the polarisation of the excitation; the anisotropy was calculated by R(t) = Ipar(t) – Iperp(t)/Itot(t) Fig. 8 Anti-bunching curve recorded at a diluted solution of fluorescein in a confocal microscope.

The procedure even works if the sequence is so fast that only one (or less than one) photon is recorded per step. The recording would just be continued until all time channels of all waveform blocks have been filled with a reasonable amount of photons. An example is shown in Fig. 20. A change in the lifetime of chlorophyll in a plant [69] was initiated by turning on the excitation light. The recording procedure steps through the curves at a rate of 50 µs/curve. Within this time, about 50 photons are recorded.

The technique has been named ‘FLITS’, fluorescence lifetime-transient scanning [22, 23, 25]. FLITS is based on building up a photon distribution over the distance along the line of the scan, the experiment time after a stimulation of the sample, and the arrival times of the photons after the excitation pulses. The principle is shown in Fig. 34. FLITS uses the same recording procedure as FLIM. Similar as for FLIM, the result is an array of pixels, each of which contains a fluorescence decay curve in form of photon numbers in subsequent time channels.

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Advanced Time-Correlated Single Photon Counting Applications by Wolfgang Becker


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