Abstract
The fresh water fish neon tetra has the ability to change the structural color of its lateral stripe in response to a change in the light conditions, from blue-green in the light-adapted state to indigo in the dark-adapted state. The colors are produced by constructive interference of light reflected from stacks of intracellular guanine crystals, forming tunable photonic crystal arrays. We have used micro X-ray diffraction to track in time distinct diffraction spots corresponding to individual crystal arrays within a single cell during the color change. We demonstrate that reversible variations in crystal tilt within individual arrays are responsible for the light-induced color variations. These results settle a long-standing debate between the two proposed models, the "Venetian blinds" model and the "accordion" model. The insight gained from this biogenic light-induced photonic tunable system may provide inspiration for the design of artificial optical tunable systems. Color switch: The physical mechanism of the light-triggered color change in the lateral stripe of the neon tetra is controlled by changing the tilt angle of the guanine crystal arrays. It is shown that the color change can be described by the "Venetian blinds" model.
| Original language | English |
|---|---|
| Pages (from-to) | 12426-12430 |
| Number of pages | 5 |
| Journal | Angewandte Chemie - International Edition |
| Volume | 54 |
| Issue number | 42 |
| DOIs | |
| Publication status | Published - Oct 1 2015 |
Fingerprint
Keywords
- biomineralization
- guanine crystals
- structural colors
- tunable photonic crystals
- X-ray diffraction
ASJC Scopus subject areas
- Chemistry(all)
- Catalysis
Cite this
The Mechanism of Color Change in the Neon Tetra Fish : A Light-Induced Tunable Photonic Crystal Array. / Gur, Dvir; Palmer, Benjamin A.; Leshem, Ben; Oron, Dan; Fratzl, Peter; Weiner, Steve; Addadi, Lia.
In: Angewandte Chemie - International Edition, Vol. 54, No. 42, 01.10.2015, p. 12426-12430.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The Mechanism of Color Change in the Neon Tetra Fish
T2 - A Light-Induced Tunable Photonic Crystal Array
AU - Gur, Dvir
AU - Palmer, Benjamin A.
AU - Leshem, Ben
AU - Oron, Dan
AU - Fratzl, Peter
AU - Weiner, Steve
AU - Addadi, Lia
PY - 2015/10/1
Y1 - 2015/10/1
N2 - The fresh water fish neon tetra has the ability to change the structural color of its lateral stripe in response to a change in the light conditions, from blue-green in the light-adapted state to indigo in the dark-adapted state. The colors are produced by constructive interference of light reflected from stacks of intracellular guanine crystals, forming tunable photonic crystal arrays. We have used micro X-ray diffraction to track in time distinct diffraction spots corresponding to individual crystal arrays within a single cell during the color change. We demonstrate that reversible variations in crystal tilt within individual arrays are responsible for the light-induced color variations. These results settle a long-standing debate between the two proposed models, the "Venetian blinds" model and the "accordion" model. The insight gained from this biogenic light-induced photonic tunable system may provide inspiration for the design of artificial optical tunable systems. Color switch: The physical mechanism of the light-triggered color change in the lateral stripe of the neon tetra is controlled by changing the tilt angle of the guanine crystal arrays. It is shown that the color change can be described by the "Venetian blinds" model.
AB - The fresh water fish neon tetra has the ability to change the structural color of its lateral stripe in response to a change in the light conditions, from blue-green in the light-adapted state to indigo in the dark-adapted state. The colors are produced by constructive interference of light reflected from stacks of intracellular guanine crystals, forming tunable photonic crystal arrays. We have used micro X-ray diffraction to track in time distinct diffraction spots corresponding to individual crystal arrays within a single cell during the color change. We demonstrate that reversible variations in crystal tilt within individual arrays are responsible for the light-induced color variations. These results settle a long-standing debate between the two proposed models, the "Venetian blinds" model and the "accordion" model. The insight gained from this biogenic light-induced photonic tunable system may provide inspiration for the design of artificial optical tunable systems. Color switch: The physical mechanism of the light-triggered color change in the lateral stripe of the neon tetra is controlled by changing the tilt angle of the guanine crystal arrays. It is shown that the color change can be described by the "Venetian blinds" model.
KW - biomineralization
KW - guanine crystals
KW - structural colors
KW - tunable photonic crystals
KW - X-ray diffraction
UR - http://www.scopus.com/inward/record.url?scp=84943197788&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84943197788&partnerID=8YFLogxK
U2 - 10.1002/anie.201502268
DO - 10.1002/anie.201502268
M3 - Article
C2 - 25914222
AN - SCOPUS:84943197788
VL - 54
SP - 12426
EP - 12430
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
SN - 1433-7851
IS - 42
ER -