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Origen estructural de la iridiscencia circularmente polarizada en los escarabajos con joyas
Vivek Sharma1, Matija Crne, Jung Ok Park
1School of Polymer, Textile, and Fiber Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
Science (New York, N.Y.)
|July 25, 2009
Resumen
El escarabajo Chrysina gloriosa.
Área de la Ciencia:
- La biofísica es la biofísica.
- Ciencia de los materiales Ciencia de los materiales.
- Coloración estructural de las estructuras.
Sus antecedentes:
- El exoesqueleto iridiscente de los escarabajos Chrysina gloriosa exhibe un reflejo selectivo de la luz polarizada circular izquierda.
- La superficie del exoesqueleto está modelada con células poligonales, principalmente hexágonos, que varían en abundancia con la curvatura de la superficie.
Objetivo del estudio:
- Para investigar la base estructural de las propiedades ópticas del exoesqueleto de Chrysina gloriosa.
- Para entender la formación y el comportamiento óptico de los patrones celulares en la superficie del escarabajo.
Principales métodos:
- Análisis microscópico que incluye campo brillante y microscopía confocal.
- Caracterización estructural de los patrones celulares del exoesqueleto.
Principales resultados:
- El exoesqueleto está compuesto de células hexagonales (aprox. 10 micrómetros) que coexisten con pentagones y heptagones, con la fracción de hexágono disminuyendo en regiones curvas.
- La microscopia reveló arcos concéntricos dentro de las células, que se asemejan a los dominios cónicos focales que se encuentran en los cristales líquidos colestéricos.
- Las propiedades ópticas, incluida la reflexión selectiva de la luz polarizada circularmente, están vinculadas a estos patrones estructurales.
Conclusiones:
- Los patrones celulares en el exoesqueleto de Chrysina gloriosa son estructuralmente análogos a las texturas de los cristales líquidos.
- Estos hallazgos ofrecen información sobre la morfogénesis de las características ópticas del exoesqueleto.
- El estudio proporciona una base para emular la respuesta óptica única del escarabajo en materiales artificiales.
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