顯微襯比 的英文怎麼說
中文拼音 [xiǎnwéichènbǐ]
顯微襯比
英文
microcontrast-
Besides, the growth of gasb expitaxy film was monitored by reflection high energy electron diffraction ( rheed ). the rheed images and intesity oscillation are collected by computer system. it showed that the gasb film prepared in 400 was amorphous and it became monocrystalline when the temperature rose to 500. atomic force microscope ( afm ) was applied to analyse the surface morphology of the films which were grown in diffrent growth rates or substrate temperature. the analysis were compared to simulation results. the experiment results indicated it was easy to form clusters when the rate of growth is high or
此外，本文通過反射式高能電子衍射（ rheed ）監測了gasb外延薄膜的生長，利用rheed強度振蕩的計算機採集系統實現了rheed圖像和rheed強度振蕩的實時監測。實驗發現在400生長的gasb薄膜為非晶態，溫度升高到500薄膜轉變為單晶。利用原子力顯微鏡對不同生長速率和襯底溫度生長的gasb薄膜的表面形貌進行觀察分析，並與模擬結果進行比較。Furthermore, the growth and the study of self - organized quantum dots structures become more and more important recently, and the application of self - organization technique become wider and wider in this thesis, we address the theory of film growth and the growth technique firstly more, the ways and characteristics of surface detection are prescribed we mainly report the growth process, results and discuss of self - organized quantum dots structures in the a12o3 substrates by s - k mode using ecr - mocvd, in the espd - u device the growth art of ain epilayer which is the preliminary foundation of self - organized gan / ain quantum dots structures, including the substrate cleaning, nitridation, the growth of buffer and the growth of gan and ain epilayer, is discussed we deliberately compare the test result of rheed xrd and afm and achieved the optimalized condition of ain at last we have successfully realized the growth of ain which is much smooth and better crystal quality moreover, we grow the self - organized gan / ain quantum dots structure in s - k mode because the limits of the heater temperature, we can not grow the atom - smooth epilayer of ain until now so we could not grow better quantum dots which have small diameter and big density but the self - organized quantum dots structures with better quality will be realized successfully if the substrate temperature is increased the thesis study belong to my tutor subject of national nature science foundation ( 69976008 )
本論文主要論述了在espd - u裝置上，採用電子迴旋共振等離子體增強mocvd （ ecr - pamocvd ）方法，在藍寶石襯底上通過s - k模式自組裝生長gan aln量子點結構的生長工藝、結果及討論。而重點分析了自組裝生長量子點之前的aln外延層生長工藝，包括襯底清洗、氮化、緩沖層的生長和gan 、 aln外延層的生長；通過高能電子衍射、 x射線衍射和原子力顯微鏡測試，並且對這些測試結果進行了詳細的比較研究，得出了較優化的工藝條件，生長出了晶質較好、表面較平整的aln外延層；進而採用s - k模式自組裝生長了gan aln量子點結構。由於實驗裝置加熱爐溫度的限制，我們沒有能夠生長出原子級平滑的aln外延層表面，因而沒能夠生長出密度比較大和直徑比較小的量子點。Also shown by afm images are the regular features of crystals and ordered crystal domains for the film grown on 200 substrates, the morphologies indicate a phase transition, which is clearly confirmed by contrast between ( 0, 0 ) and ( 0, 1 ) absorption features and the bathoshift of ( 0, 0 ) absorption peak corresponding to the temperature of the substrate
Afm圖像同時顯示，在200的襯底上生長的薄膜具有規則的晶體外型和有序排列的微疇，說明存在結晶轉變。 f - ptcdi薄膜的吸收光譜的（ 0 ， 0 ）和（ 0 ， 1 ）性狀的強度對比與紅移程度隨襯底溫度的變化清晰地表現出150到200之間存在一個相變， dsc測試說明該轉變是從低有序到高有序度的轉變。The fact that the storm stands out against the subtle banding of saturn at visible wavelengths suggests that the storm ' s cloud tops are relatively high in the atmosphere
事實上在可看見光波段揭示了由土星上細微條紋襯托出的風暴其雲頂比周圍的區域顯著要高。分享友人