Showing papers by "Emma Jakab published in 2013"
TL;DR: In this article, the authors carried out reflectance measurements on closely related Blue lycaenid butterfly males possessing so-called "pepper-pot" type photonic nanoarchitecture in their scales covering their dorsal wing surfaces.
27 citations
TL;DR: In this article, the main differences between the thermal decomposition of the samples are interpreted in terms of the altered structure of the biomass samples by the effective steam explosion treatment and the different alkali ion contents which have been determined using inductively coupled plasma-optical emission spectroscopy (ICP-OES) method.
26 citations
TL;DR: The thermal decomposition of brominated epoxy oligomer (BrEpoxy) mixtures were examined by Py-GC/MS and TG/MS techniques in order to clarify the reactions between the components of the mixtures as mentioned in this paper.
17 citations
TL;DR: In this paper, a study of the volatile products formed in the process of thermocatalytic destruction of a hardwood and the carbonizates on its basis in the presence and absence of acidic (H 3 PO 4 ) and alkaline (NaOH) activators was performed by thermogravimetry/mass spectrometry (TG/MS) method.
10 citations
TL;DR: In this article, the results of recent measurements on nine Polyommatine species with dorsal blue coloration are presented, where experiments were carried out changing the concentration and nature of test vapors while monitoring the spectral variations in time.
Abstract: Photonic crystals are periodic dielectric nanocomposites, which have photonic band gaps that forbid the propagation of light within certain frequency ranges. This property enables one to manipulate light with amazing facility. Such nanoarchitectures frequently occur in living organism like butterflies and beetles. Butterfly scales are particularly well suited to be used as optical gas sensors as their nanoarchitecture is an open sponge-like type, composed of chitin and air. The open nanoarchitecure allows fast gas exchange. The spectral change of the reflected light depends on the composition of the ambient atmosphere and also on the wing nanostructure. In this work we show the results of recent measurements on nine Polyommatine species with dorsal blue coloration. Their color is generated by similar pepper-pot type nanoarchitectures which exhibit species specific characteristics, associated with species specific color. Experiments were carried out changing the concentration and nature of test vapors while monitoring the spectral variations in time. Proper data processing results gas-selective and concentration dependent signals. Our work shows a way to a prospective integrated biological - optical sensor combining light-weight and low power consuming with environmental friendly production.
5 citations