메뉴 건너뛰기




Volumn 312, Issue 5771, 2006, Pages 242-246

Piezoelectric nanogenerators based on zinc oxide nanowire arrays

Author keywords

[No Author keywords available]

Indexed keywords

ELECTRICAL CURRENT GENERATION; METAL TIPS; NANOWIRE (NW) ARRAYS; NW-BASED PIEZOELECTRIC POWER GENERATORS;

EID: 33645810366     PISSN: 00368075     EISSN: 10959203     Source Type: Journal    
DOI: 10.1126/science.1124005     Document Type: Article
Times cited : (7139)

References (30)
  • 10
    • 24644463174 scopus 로고    scopus 로고
    • P. X. Gao et al., Science 309, 1700 (2005).
    • (2005) Science , vol.309 , pp. 1700
    • Gao, P.X.1
  • 14
    • 84891561142 scopus 로고    scopus 로고
    • note
    • A piezoelectric material can be approximately characterized by a capacitor and a resistor. The capacitor represents the piezoelectric charges accumulated in the volume, and the resistor represents its inner resistance.
  • 15
    • 84891556366 scopus 로고    scopus 로고
    • note
    • See supporting material on Science Online.
  • 16
    • 84891559402 scopus 로고    scopus 로고
    • note
    • -2 to 10 ohm-cm (17) depending on the contacts at the electrodes and the concentration of oxygen vacancies. For a NW of length 0.2 μm and diameter 40 nm, the resistance is between 16 kilohms and 16 megohms, which is much smaller than the applied external load of 500 megohms. Here we ignored the resistance produced by the ZnO film at the bottom of the nanowires because it is very large and covers the entire area of the substrate; thus, the inner resistance is dominated by the NW.
  • 20
    • 84891559060 scopus 로고    scopus 로고
    • note
    • 2+ ions stacked alternatively along the c axis. The oppositely charged ions produce positively charged (0001)-Zn and negatively charged (0001)-O polar surfaces. The Zn-terminated surface is at the growth front (positive c-axis direction) because of its higher catalytic activity (19).
  • 22
    • 84891560959 scopus 로고    scopus 로고
    • note
    • - are on the order of a few tens to hundreds of volts. In practice, if we consider the polarization and dielectric screening in the calculation, the local potential is much smaller than the numbers given by the equations here. An accurate calculation of the potential distribution as a result of the ionic charges introduced by the PZ effect and the surface charges caused by boundaries must be solved numerically and self-consistently. In our analysis, a correct magnitude and sign of the potential is sufficient for illustrating the physical model.
  • 26
    • 0035834415 scopus 로고    scopus 로고
    • Y. Huang et al., Science 294, 1313 (2001).
    • (2001) Science , vol.294 , pp. 1313
    • Huang, Y.1
  • 27
    • 0035834444 scopus 로고    scopus 로고
    • published online 4 October 2001 (10.1126/science.1065824)
    • A. Bachtold, P. Hadley, T. Nakanishi, C. Dekker, Science 294, 1317 (2001); published online 4 October 2001 (10.1126/science.1065824).
    • (2001) Science , vol.294 , pp. 1317
    • Bachtold, A.1    Hadley, P.2    Nakanishi, T.3    Dekker, C.4
  • 28
    • 27944463073 scopus 로고    scopus 로고
    • J. Chen et al., Science 310, 1171 (2005).
    • (2005) Science , vol.310 , pp. 1171
    • Chen, J.1
  • 29
    • 84891558926 scopus 로고    scopus 로고
    • U.S. patent pending
    • U.S. patent pending.
  • 30
    • 84891557138 scopus 로고    scopus 로고
    • note
    • Supported by NSF grant DMR 9733160, the NASA Vehicle Systems Program and Department of Defense Research and Engineering, and the Defense Advanced Research Projects Agency. We thank X. Wang, W. L. Hughes, J. Zhou, and J. Liu for their help.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.