Next Article in Journal
Cholinesterases and Engineered Mutants for the Detection of Organophosphorus Pesticide Residues
Previous Article in Journal
Highly Accurate and Fully Automatic 3D Head Pose Estimation and Eye Gaze Estimation Using RGB-D Sensors and 3D Morphable Models
Open AccessArticle

Optical Vapor Sensing on Single Wing Scales and on Whole Wings of the Albulina metallica Butterfly

1
Institute of Technical Physics and Materials Science, Centre for Energy Research, P.O. Box 49, H-1525 Budapest, Hungary
2
Hungarian Natural History Museum, Baross utca 13, H-1088 Budapest, Hungary
*
Author to whom correspondence should be addressed.
Sensors 2018, 18(12), 4282; https://doi.org/10.3390/s18124282
Received: 16 November 2018 / Revised: 30 November 2018 / Accepted: 3 December 2018 / Published: 5 December 2018
(This article belongs to the Section Physical Sensors)
Fast, chemically-selective sensing of vapors using an optical readout can be achieved with the photonic nanoarchitectures occurring in the wing scales of butterflies possessing structural color. These nanoarchitectures are built of chitin and air. The Albulina metallica butterfly is remarkable as both the dorsal (blue) and ventral (gold-green) cover scales are colored by the same type (pepper-pot) of photonic nanoarchitecture, exhibiting only a short-range order. The vapors of ten different volatiles were tested for sensing on whole wing pieces and some of the volatiles were tested on single scales as well, both in reflected and transmitted light. Chemically-selective responses were obtained showing that selectivity can be increased by using arrays of sensors. The sensing behavior is similar in single scales and on whole wing pieces, and is similar in reflected and transmitted light. By immersing single scales in an index-matching fluid for chitin, both the light scattering and the photonic nanoarchitecture were switched off, and the differences in pigment content were revealed. By artificially stacking several layers of blue scales on top of each other, both the intensity of the characteristic photonic signal in air and the magnitude of the vapor sensing response for 50% ethanol vapor in artificial air were increased. View Full-Text
Keywords: butterfly wing; photonic crystal; chemically-selective vapor sensing; single scales; immersion; pigment content butterfly wing; photonic crystal; chemically-selective vapor sensing; single scales; immersion; pigment content
Show Figures

Figure 1

MDPI and ACS Style

Kertész, K.; Piszter, G.; Bálint, Z.; Biró, L.P. Optical Vapor Sensing on Single Wing Scales and on Whole Wings of the Albulina metallica Butterfly. Sensors 2018, 18, 4282.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop