These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Ambient air effects on electrical transport properties of ZnO nanorod transistors.
    Author: Park JY, Kim JJ, Kim SS.
    Journal: J Nanosci Nanotechnol; 2008 Nov; 8(11):5929-33. PubMed ID: 19198328.
    Abstract:
    ZnO nanorod (NR) transistors were fabricated in a back-gated structure, and their electrical transport properties were investigated as a function of air pressure. A large shift (19.4 V) of threshold voltage (V(t,g)) toward negative gate bias is observed as the air pressure decreases to 9.06 x 10(-4) Pa. The shift of V(t,g) and the change in the flowing current between the source and drain electrode with changing the air pressure are fully reversible. The adsorption and desorption of oxygen molecules and/or OH groups in air are likely to be responsible for the reversibility. Most importantly, the electron concentration and the flowing current rapidly change only in a vacuum regime less than a certain pressure as likely as 1.33 x 10(-1) Pa. In contrast, in the low vacuum regime (>1.33 x 10(-1) Pa) ZnO NR transistors are insensitive to the change of air pressure. This observation indicates that nano-sized vacuum sensors based on ZnO NR transistors will be effective only in the high vacuum regime.
    [Abstract] [Full Text] [Related] [New Search]