UV scattering by pores in avian eggshells

M. Ladouce; T. Barakat; Bao Lian Su; O. Deparis; S. R. Mouchet

doi:10.1117/12.2567915

UV scattering by pores in avian eggshells

M. Ladouce, T. Barakat, Bao Lian Su, O. Deparis, S. R. Mouchet

Research output: Contribution in Book/Catalog/Report/Conference proceeding › Conference contribution

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Abstract

Eggshell is essential for the reproduction of birds. The optical properties of their shells may have an impact on biological functions such as heat and UV protection, recognition by the parents or camouflage. Whereas ultraviolet reflection by bird eggshells has been superficially described in the scientific literature, the physical origin of this phenomenon remains poorly understood. In this article, reflectance peaks in the near UV range were observed by spectrophotometric measurements of hen eggshells. In addition, electron microscopy imaging revealed the presence of pores within the so-called "calcified shell"part (i.e., between ca. 20 μm and ca. 240 μm deep from the outer surface). The average radii of these pores range from 120 to 160 nm. Mercury intrusion porosimetry allowed to highlight a distribution of pore radii around 175 nm. Numerical and analytical predictions using scattering theory indicate that these pores are responsible for the optical response observed in the UV range.

Original language	English
Title of host publication	Light in Nature VIII
Editors	Vasudevan Lakshminarayanan, Katherine Creath, Joseph A. Shaw
Publisher	SPIE
ISBN (Electronic)	9781510637689
DOIs	https://doi.org/10.1117/12.2567915
Publication status	Published - 21 Aug 2020
Event	Light in Nature VIII 2020 - Virtual, Online, United States Duration: 24 Aug 2020 → 4 Sept 2020

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	11481
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Light in Nature VIII 2020
Country/Territory	United States
City	Virtual, Online
Period	24/08/20 → 4/09/20

Funding

The authors thank C. Charlier (Electron Microscopy Service, UNamur) for technical support during electron microscopy observations, respectively. S.R.M. was supported by the Belgian National Fund for Scientific Research (FRS-FNRS) as a Postdoctoral Researcher (91400/1.B.309.18F). This research was also supported by FRS-FNRS through the Researchers’ Credit CC 1.5075.11F. This research used resources of the Technological Platform High Performance Computing (PTCI) (http://www.ptci.unamur.be) located at UNamur and the resources of the Electron Microscopy Service (SME) of UNamur (http://www.unamur.be/en/sevmel). PTCI is supported by FNRS-FRFC, the Walloon Region and UNamur (Conventions No. 2.5020.11, GEQ U.G006.15, 1610468 and RW/GEQ2016). PTCI and SME are members of the "Consortium des Équipements de Calcul Intensif (CÉCI)" (http://www.ceci-hpc.be) and the Technological Platform Morphology - Imaging (MORPH-IM) of UNamur, respectively.

Funders	Funder number
FNRS‐FRFC
Walloon Region and UNamur	1610468, 2.5020.11, RW/GEQ2016, GEQ U.G006.15
Fonds de la Recherche Scientifique F.R.S.-FNRS	91400/1
Fonds de la Recherche Scientifique F.R.S.-FNRS

Keywords

Avian eggshell
Cuticle
Eggshell
Nanostructure
Natural photonic structures
Photonics
Ultraviolet radiation
Ultraviolet reflectance
UV scattering

Access to Document

10.1117/12.2567915

Ladouce, 2020, Proc. SPIEFinal published version, 1.43 MB

https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11481/2567915/UV-scattering-by-pores-in-avian-eggshells/10.1117/12.2567915.short

Cite this

@inproceedings{54fd2e703d3142bf98485f5c185fe3ee,

title = "UV scattering by pores in avian eggshells",

abstract = "Eggshell is essential for the reproduction of birds. The optical properties of their shells may have an impact on biological functions such as heat and UV protection, recognition by the parents or camouflage. Whereas ultraviolet reflection by bird eggshells has been superficially described in the scientific literature, the physical origin of this phenomenon remains poorly understood. In this article, reflectance peaks in the near UV range were observed by spectrophotometric measurements of hen eggshells. In addition, electron microscopy imaging revealed the presence of pores within the so-called {"}calcified shell{"}part (i.e., between ca. 20 μm and ca. 240 μm deep from the outer surface). The average radii of these pores range from 120 to 160 nm. Mercury intrusion porosimetry allowed to highlight a distribution of pore radii around 175 nm. Numerical and analytical predictions using scattering theory indicate that these pores are responsible for the optical response observed in the UV range. ",

keywords = "Avian eggshell, Cuticle, Eggshell, Nanostructure, Natural photonic structures, Photonics, Ultraviolet radiation, Ultraviolet reflectance, UV scattering",

author = "M. Ladouce and T. Barakat and Su, {Bao Lian} and O. Deparis and Mouchet, {S. R.}",

note = "Funding Information: The authors thank C. Charlier (Electron Microscopy Service, UNamur) for technical support during electron microscopy observations, respectively. S.R.M. was supported by the Belgian National Fund for Scientific Research (FRS-FNRS) as a Postdoctoral Researcher (91400/1.B.309.18F). This research was also supported by FRS-FNRS through the Researchers{\textquoteright} Credit CC 1.5075.11F. This research used resources of the Technological Platform High Performance Computing (PTCI) (http://www.ptci.unamur.be) located at UNamur and the resources of the Electron Microscopy Service (SME) of UNamur (http://www.unamur.be/en/sevmel). PTCI is supported by FNRS-FRFC, the Walloon Region and UNamur (Conventions No. 2.5020.11, GEQ U.G006.15, 1610468 and RW/GEQ2016). PTCI and SME are members of the {"}Consortium des {\'E}quipements de Calcul Intensif (C{\'E}CI){"} (http://www.ceci-hpc.be) and the Technological Platform Morphology - Imaging (MORPH-IM) of UNamur, respectively. Publisher Copyright: {\textcopyright} 2020 SPIE. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.; Light in Nature VIII 2020 ; Conference date: 24-08-2020 Through 04-09-2020",

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publisher = "SPIE",

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booktitle = "Light in Nature VIII",

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Ladouce, M, Barakat, T , Su, BL , Deparis, O & Mouchet, SR 2020, UV scattering by pores in avian eggshells. in V Lakshminarayanan, K Creath & JA Shaw (eds), Light in Nature VIII., 114810G, Proceedings of SPIE - The International Society for Optical Engineering, vol. 11481, SPIE, Light in Nature VIII 2020, Virtual, Online, United States, 24/08/20. https://doi.org/10.1117/12.2567915

UV scattering by pores in avian eggshells. / Ladouce, M.; Barakat, T.; Su, Bao Lian et al.
Light in Nature VIII. ed. / Vasudevan Lakshminarayanan; Katherine Creath; Joseph A. Shaw. SPIE, 2020. 114810G (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11481).

Research output: Contribution in Book/Catalog/Report/Conference proceeding › Conference contribution

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T1 - UV scattering by pores in avian eggshells

AU - Ladouce, M.

AU - Barakat, T.

AU - Su, Bao Lian

AU - Deparis, O.

AU - Mouchet, S. R.

N1 - Funding Information: The authors thank C. Charlier (Electron Microscopy Service, UNamur) for technical support during electron microscopy observations, respectively. S.R.M. was supported by the Belgian National Fund for Scientific Research (FRS-FNRS) as a Postdoctoral Researcher (91400/1.B.309.18F). This research was also supported by FRS-FNRS through the Researchers’ Credit CC 1.5075.11F. This research used resources of the Technological Platform High Performance Computing (PTCI) (http://www.ptci.unamur.be) located at UNamur and the resources of the Electron Microscopy Service (SME) of UNamur (http://www.unamur.be/en/sevmel). PTCI is supported by FNRS-FRFC, the Walloon Region and UNamur (Conventions No. 2.5020.11, GEQ U.G006.15, 1610468 and RW/GEQ2016). PTCI and SME are members of the "Consortium des Équipements de Calcul Intensif (CÉCI)" (http://www.ceci-hpc.be) and the Technological Platform Morphology - Imaging (MORPH-IM) of UNamur, respectively. Publisher Copyright: © 2020 SPIE. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/8/21

Y1 - 2020/8/21

N2 - Eggshell is essential for the reproduction of birds. The optical properties of their shells may have an impact on biological functions such as heat and UV protection, recognition by the parents or camouflage. Whereas ultraviolet reflection by bird eggshells has been superficially described in the scientific literature, the physical origin of this phenomenon remains poorly understood. In this article, reflectance peaks in the near UV range were observed by spectrophotometric measurements of hen eggshells. In addition, electron microscopy imaging revealed the presence of pores within the so-called "calcified shell"part (i.e., between ca. 20 μm and ca. 240 μm deep from the outer surface). The average radii of these pores range from 120 to 160 nm. Mercury intrusion porosimetry allowed to highlight a distribution of pore radii around 175 nm. Numerical and analytical predictions using scattering theory indicate that these pores are responsible for the optical response observed in the UV range.

AB - Eggshell is essential for the reproduction of birds. The optical properties of their shells may have an impact on biological functions such as heat and UV protection, recognition by the parents or camouflage. Whereas ultraviolet reflection by bird eggshells has been superficially described in the scientific literature, the physical origin of this phenomenon remains poorly understood. In this article, reflectance peaks in the near UV range were observed by spectrophotometric measurements of hen eggshells. In addition, electron microscopy imaging revealed the presence of pores within the so-called "calcified shell"part (i.e., between ca. 20 μm and ca. 240 μm deep from the outer surface). The average radii of these pores range from 120 to 160 nm. Mercury intrusion porosimetry allowed to highlight a distribution of pore radii around 175 nm. Numerical and analytical predictions using scattering theory indicate that these pores are responsible for the optical response observed in the UV range.

KW - Avian eggshell

KW - Cuticle

KW - Eggshell

KW - Nanostructure

KW - Natural photonic structures

KW - Photonics

KW - Ultraviolet radiation

KW - Ultraviolet reflectance

KW - UV scattering

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U2 - 10.1117/12.2567915

DO - 10.1117/12.2567915

M3 - Conference contribution

AN - SCOPUS:85093923469

T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - Light in Nature VIII

A2 - Lakshminarayanan, Vasudevan

A2 - Creath, Katherine

A2 - Shaw, Joseph A.

PB - SPIE

T2 - Light in Nature VIII 2020

Y2 - 24 August 2020 through 4 September 2020

ER -

UV scattering by pores in avian eggshells

Abstract

Publication series

Conference

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Morphology - Imaging

Optics, Lasers and spectroscopy

Physical Chemistry and characterization(PC2)

Cite this

UV scattering by pores in avian eggshells

Abstract

Publication series

Conference

Funding

Keywords

Access to Document

Other files and links

Fingerprint

Equipment

Morphology - Imaging

Optics, Lasers and spectroscopy

Physical Chemistry and characterization(PC2)

Cite this