La(OH)3 and La2O3 Nanobelts—Synthesis and Physical Properties


  • The research was supported by an NSF grant DMR-9733160, the NASA Vehicle Systems Program and Department of Defense Research and Engineering (DDR&E), the Defense Advanced Research Projects Agency (Award No. N66001-04-1-8903), and the CCNE from the NIH. C.G.H. and H.L. are grateful for the support of the NSFC (No. 60376032, 90406024, and 50572052). G.B. is grateful for the support of the NIH (1U01HL80711-01).


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A facile composite-hydroxide-mediated synthesis method is adopted to prepare ultralong, single-crystalline, hexagonal structured La(OH)3 nanobelts. The detectable conductive behavior of a single La(OH)3 nanobelt promises their potential application in sensors. La2O3 nanobelts can be obtained by calcination of the La(OH)3 nanobelts. Both types of nanobelts fluoresce with purple light under UV excitation, which may be used in biological labeling.