Eu의 조성에 따른 특징을 알아보기 위해 Eu를 2~10mol%만큼 변화하여 PL값을 측정하였다. PL측정결과 조성이 증가함에 따라 intensity도 증가하였으나 특정 조성을 지나면 다시 감소하는 경향을 보였다. 온도에 따른 특징을 알아보기 위해 열처리온도를 900~1450℃로 달리하여 PL과 XRD, SEM로 분석하였다. 분석 결
The ZnO and ZnMgO nanostructures were grown on silicon substrates at different temperatures, using gold metal as a catalyst in the presence of argon as a carrier gas in a conventional tube furnace.
The effects of the substrate temperatures, gold catalyst, and source material preparation on the morphological and optical properties of the nanostructures were investigated.
Si substrates were c
∙ ZnO is an good candidate for fabrication of optoelectronic
and electronic device.
∙ 1D ZnO nanostructures have many properties.
∙ It is that a simple two-step thermal evaporation process
to synthesize the hierarchical pure ZnO nanostructures of 6-fold structural symmetry without any metal catalyst.
∙ Pure zinc powder(99.99%)
of the products were investigated using energy dispersive X-ray (EDX, Quanta 200F). Room temperature photoluminescence (PL, Jobin Yvon Horiba HR 800 UV) spectroscopy was employed to study the optical properties of the ZnO films using a He–Cd laser with a wavelength of 325 nm as the excitation source at a 20 mW power level.
3. Result and discussion
Fig. 1 shows the XRD patterns of al
of Term Papers, Theses, and Dissertations, 6th ed. (The University of Chicago Press, 1996) 을 참고하였습니다. 문헌의 표시와 인용에 관한 부분은 Turabian의 위 책과 The Bluebook -A Uniform System of Citation, 16th ed. (Harvard Law Review Association, 1996)을 참고한 바 있습니다. 그리고 프랑스 문헌에 관한 것은 남효순 교수가 정인섭 외 공저,