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National Institute of Environmental Health Sciences

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Publication Detail

Title: Room-temperature electron spin dynamics in free-standing ZnO quantum dots.

Authors: Liu, William K; Whitaker, Kelly M; Smith, Alyssa L; Kittilstved, Kevin R; Robinson, Bruce H; Gamelin, Daniel R

Published In Phys Rev Lett, (2007 May 4)

Abstract: Conduction band electrons in colloidal ZnO quantum dots have been prepared photochemically and examined by electron paramagnetic resonance spectroscopy. Nanocrystals of 4.6 nm diameter containing single S-shell conduction band electrons have g(*)=1.962 and a room-temperature ensemble spin-dephasing time of T(2)(*)=25 ns, as determined from linewidth analysis. Increasing the electron population leads to increased g(*) and decreased T(2)(*), both associated with formation of P-shell configurations. A clear relationship between T(2)(*) and hyperfine coupling with 67Zn(I=5/2) is observed.

PubMed ID: 17501594 Exiting the NIEHS site

MeSH Terms: No MeSH terms associated with this publication

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