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.
Qin
Bing
B
National Center for Nanoscience and Technology, Beijing 100190, China.
Chen
Hongyue
H
Liang
Hui
H
Fu
Lei
L
Liu
Xinfeng
X
Qiu
Xiaohui
X
Liu
Shaoqin
S
Song
Rui
R
Tang
Zhiyong
Z
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