本文選題：硫化鎘 + 氧化銅　； 參考：《中國科學(xué)技術(shù)大學(xué)》2016年博士論文

【摘要】：表面增強(qiáng)拉曼散射(RRS和SERS)是非常有用的材料研究技術(shù),但是由于對特定激發(fā)光波長以及實(shí)驗(yàn)上其他的特殊要求,實(shí)驗(yàn)上很難同時(shí)觀測到這兩種現(xiàn)象。在本研究中,我們通過在玻璃襯底上生長一層銀等離子體納米顆粒,并且在原位拉曼變溫測量中改變硫化鎘的禁帶寬度,同時(shí)觀測到了共振和表面增強(qiáng)拉曼散射。通過大幅增強(qiáng)拉曼散射強(qiáng)度,我們可以在熱處理中實(shí)時(shí)原位觀測硫化鎘的物相變化,并且定量計(jì)算出硫化鎘立方相所占六方相的比例。通過多種表征技術(shù),我們研究了空氣中退火對硫化鎘性能的影響,并發(fā)現(xiàn)由于氧化作用,硫化鎘薄膜的質(zhì)量較低。由于大幅增強(qiáng)的納米等離子體電場,我們觀測到了拉曼多聲子共振和與之相應(yīng)的高階散射模式。同時(shí),我們也用傅立葉變換時(shí)域有限差分法(FTDT)對納米銀顆粒上生長硫化鎘進(jìn)行了表面散射增強(qiáng)計(jì)算,計(jì)算結(jié)果與實(shí)驗(yàn)結(jié)果一致。相比于氧化亞銅,氧化銅具有較低的禁帶寬度,這使其在能源利用設(shè)備中更具應(yīng)用前期。在本研究中,我們用磁控濺射方法在銀納米顆粒上生長一層氧化銅薄膜,并用變溫表面增強(qiáng)拉曼研究其性能。通過大幅增強(qiáng)的表面納米等離子體電場,成功地觀測到氧化亞銅立方相并且在高溫下的相變。利用不同的激發(fā)波長測量了室溫下普通拉曼與增強(qiáng)拉曼光譜并進(jìn)行了對比分析。只有632.8nm的激光能探測出生長在表面增強(qiáng)襯底上的氧化銅和氧化亞銅主拉曼振動(dòng)模式。然而,XRD和XPS只能探測出氧化亞銅,因?yàn)樵谕嘶鹎昂笱趸瘉嗐~是主要物相。
[Abstract]:Surface enhanced Raman scattering (RRS) and SERS (surface enhanced Raman scattering) are very useful materials research techniques. However, due to the special requirements of specific excited wavelength and other experimental requirements, it is difficult to observe these two phenomena simultaneously experimentally. In this study, a layer of silver plasma nanoparticles was grown on glass substrate, and the bandgap of cadmium sulfide was changed in situ Raman temperature measurements. Resonance and surface-enhanced Raman scattering were observed at the same time. By greatly increasing Raman scattering intensity, we can observe the phase change of cadmium sulfide in situ in real time during heat treatment, and calculate quantitatively the proportion of hexagonal phase in cubic phase of cadmium sulfide. The effects of annealing in air on the properties of cadmium sulfide were investigated by various characterization techniques. It was found that the quality of cadmium sulfide films was low due to oxidation. The Raman multiphonon resonance and the corresponding higher-order scattering modes have been observed due to the large enhancement of the nanoscale plasma electric field. At the same time, the surface scattering enhancement of cadmium sulfide grown on silver nanoparticles is calculated by Fourier transform finite-difference time-domain method (FTDTT). The calculated results are in agreement with the experimental results. Compared with cuprous oxide, copper oxide has lower band gap, which makes it more early applied in energy utilization equipment. In this study, a layer of copper oxide thin films was grown on silver nanoparticles by magnetron sputtering. The phase transition of cuprous oxide cubic phase at high temperature was observed successfully by a large enhanced surface nanoscale plasma electric field. Raman and enhanced Raman spectra were measured at room temperature with different excitation wavelengths. Only the laser of 632.8nm can detect the main Raman modes of copper oxide and cuprous oxide grown on the surface-enhanced substrates. However, XPS and XPS can only detect cuprous oxide, because cuprous oxide is the main phase before and after annealing.
【學(xué)位授予單位】：中國科學(xué)技術(shù)大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2016
【分類號】：TN304;O657.37
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本文編號：1799212