Mikhonin, AV and Maurer, MK and Reese, CE and Asher, SA
(2005)
Simple nanosecond to minutes transient absorption spectrophotometer.
Applied Spectroscopy, 59 (12).
1534 - 1540.
ISSN 0003-7028
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Abstract
We built a transient absorption spectrophotometer that can determine transient absorption spectral changes that occur at times as fast as -200 ns and as slow as a minute. The transient absorption can be induced by a temperature-jump (T-jump) or by optical pumping from the deep ultraviolet (UV) to the infrared (IR) by use of single ns Nd:YAG laser pulses. Our use of a fiber-optic spectrometer coupled to a XeF flashlamp makes the collection of transient spectra easy and convenient in the spectral range from the near IR (1700 nm) down to the deep UV (200 nm), with high signal-to-noise (S/N) ratios. The spectral resolution is determined by the specific configuration of the fiber-optic spectrometer (grating groove density, fiber diameter, slit width) and varies between 0.3 and 10 nm. The utility of this spectrometer was demonstrated by measuring the rate at which a polymerized crystalline colloidal array (PCCA) of poly(N-isopropylacrylamide) nanogel particles optically switch light due to a T-jump induced by nanosecond 1.9 μm laser pulses. In addition, we measured the rate of optical switching induced by a 3 ns 355 nm pump pulse in PCCA functionalized with azobenzene. © 2005 Society for Applied Spectroscopy.
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Details
Item Type: |
Article
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Status: |
Published |
Creators/Authors: |
Creators | Email | Pitt Username | ORCID ![](/images/orcid_id_24x24.png) |
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Mikhonin, AV | | | | Maurer, MK | | | | Reese, CE | | | | Asher, SA | asher@pitt.edu | ASHER | |
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Date: |
1 December 2005 |
Date Type: |
Publication |
Journal or Publication Title: |
Applied Spectroscopy |
Volume: |
59 |
Number: |
12 |
Page Range: |
1534 - 1540 |
DOI or Unique Handle: |
10.1366/000370205775142476 |
Schools and Programs: |
Dietrich School of Arts and Sciences > Chemistry |
Refereed: |
Yes |
ISSN: |
0003-7028 |
MeSH Headings: |
Equipment Design; Equipment Failure Analysis; Kinetics; Reproducibility of Results; Sensitivity and Specificity; Spectrophotometry, Atomic--instrumentation; Spectrophotometry, Atomic--methods; Spectrum Analysis, Raman--instrumentation; Spectrum Analysis, Raman--methods; Time Factors |
PubMed ID: |
16390594 |
Date Deposited: |
08 Feb 2013 21:12 |
Last Modified: |
02 Feb 2019 16:55 |
URI: |
http://d-scholarship-dev.library.pitt.edu/id/eprint/17212 |
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