electrostatic force microscopy
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2021 ◽  
Vol 141 (6) ◽  
pp. 373-378
Author(s):  
Yoshikazu Nishiguchi ◽  
Junpei Higashio ◽  
Toshio Uehara ◽  
Yoshito Ashizawa ◽  
Katsuji Nakagawa

2021 ◽  
Vol 12 ◽  
pp. 139-150
Author(s):  
Wescley Walison Valeriano ◽  
Rodrigo Ribeiro Andrade ◽  
Juan Pablo Vasco ◽  
Angelo Malachias ◽  
Bernardo Ruegger Almeida Neves ◽  
...  

The aim of this work is to determine the varying dielectric constant of a biological nanostructured system via electrostatic force microscopy (EFM) and to show how this method is useful to study natural photonic crystals. We mapped the dielectric constant of the cross section of the posterior wing of the damselfly Chalcopteryx rutilans with nanometric resolution. We obtained structural information on its constitutive nanolayers and the absolute values of their dielectric constant. By relating the measured profile of the static dielectric constant to the profile of the refractive index in the visible range, combined with optical reflectance measurements and simulation, we were able to describe the origin of the strongly iridescent wing colors of this Amazonian rainforest damselfly. The method we demonstrate here should be useful for the study of other biological nanostructured systems.


2020 ◽  
Vol 32 (2) ◽  
pp. 025705
Author(s):  
Yeseong Choi ◽  
Su-Mi Kim ◽  
Youhee Heo ◽  
Gyudo Lee ◽  
Ji Yoon Kang ◽  
...  

2020 ◽  
Author(s):  
Wescley Walison Valeriano ◽  
Rodrigo Ribeiro Andrade ◽  
Juan Pablo Vasco ◽  
Angelo Malachias ◽  
Bernardo Ruegger Almeida Neves ◽  
...  

  The aim of this work is to determine the dielectric constant value of a bio-nanostructured system via Electrostatic Force Microscopy (EFM) and to show how this method is useful to study natural photonic crystals. We mapped the dielectric constant of the cross-section of the posterior wing of the damselfly Chalcopteryx rutilans with nanometric resolution and obtained not only structural information on its constitutive nanolayers but also on the absolute values of the dielectric constant variation in a nanometric scale. By relating the measured profile of the static dielectric constant to the profile of the refractive index in the visible range, combined with optical reflectance measurements and simulation, we were able to describe the origin of the strongly iridescent wing colors of this Amazonian rainforest damselfly. The method we demonstrate here should be useful for the study of other nanostructured biological systems.


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