氧化銅奈米桿的快速製備及其光學特性

Fast Fabrication of Cupric Oxide Nanorods and Their Optical Properties

陳慶緒(Ching-Hsu Chen) ； 孫祥育(Shuin-Yu Sun) ； 陳江源(Chiang-Yuan Chen)

《國立虎尾科技大學學報》 27卷4期 (2008/12) Pp. 29-35

https://doi.org/10.6425/JNHUST.200812.0029

摘要

本文報導兩種濕式化學法製備奈米氧化銅，第一種利用硝酸銅酒精溶液與氫氧化鈉水溶液反應再經高壓鍋製程，藉由控制溶液酸鹼度、反應時間及反應溫度可以得到不同大小的氧化銅奈米桿；第二種是將氫氧化鈉固體顆粒直接加入硝酸銅水溶液的快速反應法，可以在兩分鐘內就合成高長寬比的均勻氧化銅奈米桿，此方法具有量產的潛力，其樣品長度約300奈米、寬度約15奈米。以波長325奈米之光源激發得到的螢光光譜顯示有波長736奈米的尖峰，其對應到能隙寬度約為1.68eV；快速反應法樣品的拉曼光譜尖峰顯示往高頻位移現象，此與先前別人的研究有所不同。

關鍵字

氧化銅 ； 奈米桿 ； 螢光光譜 ； 拉曼光譜

並列摘要

We prepared CuO nanorods by use of two kinds of wet chemical methods. The first method is to mix the NaOH aqueous solution and Cu(NO3)2 in ethanol, and then continue their reaction in autoclave. By varying the pH values of solutions, the reactive time, and the reactive temperature, we obtained the CuO nanorods with different lengths and widths. The second method is to throw the solid grains of NaOH into the Cu(NO3)2 aqueous solution directly and we obtained the CuO nanorods with high aspect ratio within two minutes. The nanorod's length is about 300 nm and the width is about 15 nm. This method has potential for mass production. Photoluminescence spectrum with 325 nm pumping reveals a transition at 736 nm that corresponds to the band gap energy of 1.68 eV. However, the Raman peak shifts to the higher frequencies for the fast fabricated sample is different from the previous research.

並列關鍵字

cupric oxide ； nanorod ； photoluminescence spectrum ； Raman spectrum

參考文獻

Campbell, I.H.,Fauchet, P.M.(1986).The effects of microcrystal size and shape on the one phonon Raman spectra of crystalline semiconductors.Solid State Commun..58,739.

Cao, M.,Hu, C.,Wang, Y.,Guo, Y.,Guo, C.,Wang, E.(2003).A controllable synthetic route to Cu, Cu2O, and CuO nanotubes and nanorods.Chem. Commun..14,1884.

Ching, W.Y.,Xu, Y.N.,Wong, K.W.(1989).Ground-state and optical properties of Cu2O and CuO crystals.Phys. Rev. B.40,7684.

Guha, S.,Peebles, D.,Wieting, T.J.(1991).Zone-center (q=0) optical phonons in CuO studied by Raman and infrared spectroscopy.Phys. Rev. B.43,13092.

Hsieh, C.T.,Chen, J.M.,Lin, H.H.,Shih, H.C.(2003).Synthesis of well-ordered CuO nanofibers by a self-catalytic growth mechanism.Appl. Phys. Lett..82,3316.