Reversible photoswitchable fluorescence in thin films of inorganic nanoparticle and polyoxometalate assemblies.
A novel type of inorganic hybridized ultrathin film consisting of Preyssler-type polyoxometalates K(14)[Na(H(2)O)P(5)W(30)O(110)] (Na-POMs) and CdSe@CdS nanoparticles (NPs) was prepared on the solid substrates by a layer-by-layer assembly technique. The film exhibits reversible fluorescence switching behavior under control of irradiation with either UV light or visible light, which is ascribed to the selective occurrence of fluorescence resonance energy transfer between luminescent NPs and different states of photochromic Na-POMs.
National Center for Nanoscience and Technology, Beijing 100190, China.
Bing
B
Qin
Hongyue
H
Chen
Hui
H
Liang
Lei
L
Fu
Xinfeng
X
Liu
Xiaohui
X
Qiu
Shaoqin
S
Liu
Rui
R
Song
Zhiyong
Z
Tang
D019187:Cadmium Compounds / Q000737:chemistry*; D005453:Fluorescence; D008567:Membranes, Artificial; D053758:Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D010777:Photochemistry; D011094:Polyethyleneimine / Q000737:chemistry; D018036:Selenium Compounds / Q000737:chemistry*; D013440:Sulfides / Q000737:chemistry*; D013499:Surface Properties; D017973:Tungsten Compounds / Q000737:chemistry*; D000099294:Polyoxometalates
D019187:Cadmium Compounds; D008567:Membranes, Artificial; D011094:Polyethyleneimine; D018036:Selenium Compounds; D013440:Sulfides; D017973:Tungsten Compounds; C102296:polyoxometalate I; D000099294:Polyoxometalates; C034939:cadmium sulfide; C058667:cadmium selenide