Nanoscale chemical mapping of laser-solubilized silk

Ryu, Meguya, Kobayashi, Hanae, Balčytis, Armandas, Wang, Xuewen, Vongsvivut, Jitraporn, Li, Jingliang, Urayama, Norio, Mizeikis, Vygantas, Tobin, Mark, Juodkazis, Saulius and Morikawa, Junko 2017, Nanoscale chemical mapping of laser-solubilized silk, Materials research express, vol. 4, no. 11, pp. 1-6, doi: 10.1088/2053-1591/aa98a9.

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Title Nanoscale chemical mapping of laser-solubilized silk
Author(s) Ryu, Meguya
Kobayashi, Hanae
Balčytis, Armandas
Wang, Xuewen
Vongsvivut, Jitraporn
Li, JingliangORCID iD for Li, Jingliang
Urayama, Norio
Mizeikis, Vygantas
Tobin, Mark
Juodkazis, Saulius
Morikawa, Junko
Journal name Materials research express
Volume number 4
Issue number 11
Article ID 115028
Start page 1
End page 6
Total pages 6
Publisher IOP Publishing
Place of publication Bristol, Eng.
Publication date 2017-11
ISSN 2053-1591
Keyword(s) silk
synchrotron radiation
science & technology
materials science
Summary A water soluble amorphous form of silk was made by ultra-short laser pulse irradiation and detected by nanoscale IR mapping. An optical absorption-induced nanoscale surface expansion was probed to yield the spectral response of silk at IR molecular fingerprinting wavelengths with a high ∼ 20 nm spatial resolution defined by the tip of the probe. Silk microtomed sections of 1-5 μm in thickness were prepared for nanoscale spectroscopy and a laser was used to induce amorphisation. Comparison of silk absorbance measurements carried out by table-top and synchrotron Fourier transform IR spectroscopy proved that chemical imaging obtained at high spatial resolution and specificity (able to discriminate between amorphous and crystalline silk) is reliably achieved by nanoscale IR. Differences in absorbance and spectral line-shapes of the bands are related to the different sensitivity of the applied methods to real and imaginary parts of permittivity. A nanoscale material characterization by combining synchrotron IR radiation and nano-IR is discussed.
Language eng
DOI 10.1088/2053-1591/aa98a9
Field of Research 090403 Chemical Engineering Design
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Grant ID JSPS KAKENHI Grant No.16K06768
Swinburne’s startup grant for Nanotechnology facility and partial support via ARC Discovery DP130101205 and DP170100131 grants
beamtime project No. 11119 at the Australian Synchrotron IRM Beamline
Window-on-Photonics R&D, Ltd. is acknowledged for joint development grant and laser fabrication facility
Copyright notice ©2017, IOP Publishing Ltd
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Document type: Journal Article
Collections: Institute for Frontier Materials
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