TY  - JOUR
A1  - Radziuk, Darya
A1  - Skirtach, Andre
A1  - Gessner, Andre
A1  - Kumke, Michael Uwe
A1  - Zhang, Wei
A1  - Möhwald, Helmuth
A1  - Shchukin, Dmitry
T1  - Ultrasonic Approach for Formation of Erbium Oxide Nanoparticles with Variable Geometries
T2  - Langmuir
N2  - Ultrasound (20 kHz, 29 W. cm(-2)) is employed to form three types of erbium oxide nanoparticles in the presence of multiwalled carbon nanotubes as a template material in water. The nanoparticles are (i) erbium carboxioxide nanoparticles deposited on the external walls of multiwalled carbon nanotubes and Er(2)O(3) in the bulk with (ii) hexagonal and (iii) spherical geometries. Each type of ultrasonically formed nanoparticle reveals Er(3+) photoluminescence from crystal lattice. The main advantage of the erbium carboxioxide nanoparticles on the carbon nanotubes is the electromagnetic emission in the visible region, which is new and not examined up to the present date. On the other hand, the photoluminescence of hexagonal erbium oxide nanoparticles is long-lived (mu s) and enables the higher energy transition ((4)S(3/2)-(4)I(15/2)), which is not observed for spherical nanoparticles. Our work is unique because it combines for the first time spectroscopy of Er(3+) electronic transitions in the host crystal lattices of nanoparticles with the geometry established by ultrasound in aqueous solution of carbon nanotubes employed as a template material. The work can be of great interest for "green" chemistry synthesis of photoluminescent nanoparticles in water.
Y1  - 2011
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/36444
SN  - 0743-7463
VL  - 27
IS  - 23
SP  - 14472
EP  - 14480
PB  - American Chemical Society
CY  - Washington
ER  -