We investigated the electric transport properties of single TiO2 nanotubes separated from an anodic titania nanotube array. The temperature dependence of the resistance measured with the conventional four point method of all investigated samples show a Mott variable range hopping behavior. The results obtained with two contacts indicate the existence of a potential barrier between the Cr/Au contacts and samples surfaces, which influence is clearly observable at temperatures <150 K. Impedance spectroscopy in the frequency range of 40 Hz to 1 MHz carried out at room temperature indicates that the electronic transport of these polycrystalline tubes is dominated by the grain cores. (C) 2013 AIP Publishing LLC.
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AGH Univ Sci & Technol, Fac Mat Sci & Ceram, Al A Mickiewicza 30, PL-30059 Krakow, PolandAGH Univ Sci & Technol, Fac Mat Sci & Ceram, Al A Mickiewicza 30, PL-30059 Krakow, Poland
Kolacz, K.
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Gajewska, M.
Komornicki, S.
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AGH Univ Sci & Technol, Fac Mat Sci & Ceram, Al A Mickiewicza 30, PL-30059 Krakow, PolandAGH Univ Sci & Technol, Fac Mat Sci & Ceram, Al A Mickiewicza 30, PL-30059 Krakow, Poland
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Univ Calif San Diego, Mech & Aerosp Engn, La Jolla, CA 92093 USA
Western Digital Inc, 5601 Great Oaks Pkwy, San Jose, CA 95119 USAUniv Calif San Diego, Mech & Aerosp Engn, La Jolla, CA 92093 USA
Yoon, Yeoungchin
Park, Jeongwon
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Univ Ottawa, Elect Engn & Comp Sci, Ottawa, ON K1N 6N5, CanadaUniv Calif San Diego, Mech & Aerosp Engn, La Jolla, CA 92093 USA
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Indian Inst Technol, Dept Met & Mat Engn, Madras 600036, Tamil Nadu, IndiaIndian Inst Technol, Dept Met & Mat Engn, Madras 600036, Tamil Nadu, India
Munirathinam, Balakrishnan
Neelakantan, Lakshman
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Indian Inst Technol, Dept Met & Mat Engn, Madras 600036, Tamil Nadu, IndiaIndian Inst Technol, Dept Met & Mat Engn, Madras 600036, Tamil Nadu, India
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Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing 210008, Peoples R ChinaChinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing 210008, Peoples R China
Su Ya-Ling
Zhang Fei-Bai
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Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing 210008, Peoples R ChinaChinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing 210008, Peoples R China
Zhang Fei-Bai
Du Ying-Xun
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Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing 210008, Peoples R ChinaChinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing 210008, Peoples R China
Du Ying-Xun
Xiao Yu-Tang
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Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing 210008, Peoples R ChinaChinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing 210008, Peoples R China