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

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Résumé

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.

langue originale	Anglais
titre	Light in Nature VIII
rédacteurs en chef	Vasudevan Lakshminarayanan, Katherine Creath, Joseph A. Shaw
Editeur	SPIE
ISBN (Electronique)	9781510637689
Les DOIs	https://doi.org/10.1117/12.2567915
Etat de la publication	Publié - 21 août 2020
Evénement	Light in Nature VIII 2020 - Virtual, Online, États-Unis Durée: 24 août 2020 → 4 sept. 2020

Série de publications

Nom	Proceedings of SPIE - The International Society for Optical Engineering
Volume	11481
ISSN (imprimé)	0277-786X
ISSN (Electronique)	1996-756X

Une conférence

Une conférence	Light in Nature VIII 2020
Pays/Territoire	États-Unis
La ville	Virtual, Online
période	24/08/20 → 4/09/20

Accès au document

10.1117/12.2567915

Ladouce, 2020, Proc. SPIEVersion finale publiée, 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

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Link to publication in Scopus

Morphologie - Imagerie
Cecchet, F. (!!Manager) & Renard, H.-F. (!!Manager)
Plateforme technologique Morphologie, imagerie
Equipement/installations: Plateforme technolgique
Optique, Lasers et spectroscopies
Lepere, M. (!!Manager)
Plateforme technologique Lasers, optiques et spectroscopies
Equipement/installations: Plateforme technolgique
Physico-chimie et caractérisation (PC2)
Wouters, J. (!!Manager), Aprile, C. (!!Manager) & Fusaro, L. (!!Manager)
Plateforme technologique Caracterisation physico-chimiques
Equipement/installations: Plateforme technolgique

Contient cette citation

@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",

year = "2020",

month = aug,

day = "21",

doi = "10.1117/12.2567915",

language = "English",

series = "Proceedings of SPIE - The International Society for Optical Engineering",

publisher = "SPIE",

editor = "Vasudevan Lakshminarayanan and Katherine Creath and Shaw, {Joseph A.}",

booktitle = "Light in Nature VIII",

}

Ladouce, M, Barakat, T , Su, BL , Deparis, O & Mouchet, SR 2020, UV scattering by pores in avian eggshells. Dans 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, États-Unis, 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).

Résultats de recherche: Contribution dans un livre/un catalogue/un rapport/dans les actes d'une conférence › Article dans les actes d'une conférence/un colloque

TY - GEN

T1 - UV scattering by pores in avian eggshells

AU - Ladouce, M.

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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

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KW - Natural photonic structures

KW - Photonics

KW - Ultraviolet radiation

KW - Ultraviolet reflectance

KW - UV scattering

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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

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Y2 - 24 August 2020 through 4 September 2020

ER -

UV scattering by pores in avian eggshells

Résumé

Série de publications

Une conférence

Accès au document

Autres fichiers et liens

Empreinte digitale

Équipement

Morphologie - Imagerie

Optique, Lasers et spectroscopies

Physico-chimie et caractérisation (PC2)

Contient cette citation