DOI QR코드

DOI QR Code

Field Emission Characteristics of ZnO Nanowires Grown by Hydrothermal Method

수열합성법에 의해 성장된 ZnO 나노와이어의 전계방출 특성

  • Received : 2009.12.30
  • Accepted : 2010.01.18
  • Published : 2010.02.28

Abstract

We fabricated FEDs(Filed emission devices) based on ZnO nanowires. The ZnO nanowires were synthesized on Au thin films by hydrothermal method at the temperature of 90[$^{\circ}C$] on hot plate. In order to form tips of the ZnO nanowire, SDS(Sodium Dodecyl Sulfate) was mixed in O.05-0.3[wt%] solution as capping material. After 2 hour growth, we obtained nanowires of chain form The high-purity nanowires showed sharp tip geometry with a wurtzite structure. The field emission properties of the ZnO nanowires were investigated in high vacuum chamber. The turn-on field for the ZnO nanowires was found to be about 4.1[V/${\mu}m$] at a current density of 0.1[${\mu}A/cm^2$].

본 논문은 수열합성법에 의해 합성된 ZnO 나노와이어의 전계방출 특성을 연구하였다. ZnO 나노와이어는 핫플레이트 위에서 90[$^{\circ}C$]의 온도로 Au 박막위에서 합성되었으며, ZnO 나노와이어의 팁을 형성하기 위한 캡핑 재료로 SDS(Sodium Dodecyl Sulfate)를 0.05~0.3[wt%] 용액에 혼합하였다. 2시간동안 수열합성후 체인 형태의 ZnO 나노와이어가 성장되었다. 고순도의 ZnO 나노와이어는 울자이트(Wurzite) 구조의 팁 형태를 보였으며, ZnO 나노와이어의 전계방출 특성은 고진공 챔버에서 측정하였고, 나노와이어의 턴-온 전계는 0.1[${\mu}A/cm^2$]의 전류밀도에서 4.1V/${\mu}m$]를 나타내었다.

Keywords

References

  1. L Liao, "Field emission property improvement of ZnO nanowires coated with amorphous carbon and carbon nitride films", Nanotechnology, Vol 16, no 6, pp. 985, 2005. https://doi.org/10.1088/0957-4484/16/6/061
  2. Shaojing Bu, "Growth of ZnO Nanowires in Aqueous Solution by a Dissolution-Growth Mechanism", Journal of Nanomaterials, Vol 2008, No 15, pp 5, 2008.
  3. A. Wei and X. W. Sun, "Stable field emission from hydrothermally grown ZnO nanotubes", APPLIED PHYSICS LETTERS, Vol 88, pp. 213102, 2006. https://doi.org/10.1063/1.2206249