Synthesis of ZnO tetrapods for flexible and transparent UV sensors.
ZnO tetrapods (ZnO-Ts) were synthesized in a vertical flow reactor by gas phase oxidation of Zn vapor in an air atmosphere. The morphology of the product was varied from nearly spherical nanoparticles to ZnO-Ts, together with the partial pressure of Zn and reaction temperature. MgO introduced during synthesis, increased the band gap, the optical transparency in the visible range, and also changed the ZnO-T structure. Fabricated flexible transparent UV sensors showed a 45-fold current increase under UV irradiation with an intensity of 30 μW cm(-2) at a wavelength of 365 nm and response time of 0.9 s.
Department of Applied Physics, Aalto University, Espoo, Finland. simas.rackauskas@tkk.fi
Simas
S
Rackauskas
Kimmo
K
Mustonen
Terhi
T
Järvinen
Marco
M
Mattila
Olga
O
Klimova
Hua
H
Jiang
Oleg
O
Tolochko
Harri
H
Lipsanen
Esko I
EI
Kauppinen
Albert G
AG
Nasibulin
D055119:Elastic Modulus; D004867:Equipment Design; D019544:Equipment Failure Analysis; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D011829:Radiation Dosage; D011874:Radiometry / Q000379:methods*; D012031:Refractometry / Q000295:instrumentation*; D013499:Surface Properties; D014159:Transducers; D014466:Ultraviolet Rays; D015034:Zinc Oxide / Q000737:chemistry*
D046911:Macromolecular Substances; D015034:Zinc Oxide