光谱学与光谱分析
光譜學與光譜分析
광보학여광보분석
SPECTROSCOPY AND SPECTRAL ANALYSIS
2014年
8期
2031-2034
,共4页
氧化锌纳米团簇%聚苯乙烯胶体球%射频磁控溅射%光吸收谱%离散偶极子近似
氧化鋅納米糰簇%聚苯乙烯膠體毬%射頻磁控濺射%光吸收譜%離散偶極子近似
양화자납미단족%취분을희효체구%사빈자공천사%광흡수보%리산우겁자근사
ZnO nanoclusters%Polystyrene colloidal spheres%RF magnetron sputtering%Optical absorption spectra%Discrete di-pole approximation
采用漂移法，在玻璃衬底上制备出粒径分别为117，350和500 nm单层、大面积的聚苯乙烯胶体球掩膜板，在已制得的掩膜板上用射频磁控溅射的方法沉积一层氧化锌薄膜，最后用有机溶液四氢呋喃（THF）浸泡去除聚苯乙烯胶体球，获得不同粒径的二维氧化锌纳米团簇。通过扫描电子显微镜和能量色散X射线光谱仪对样品的形貌及成份进行表征，表明所制得样品为有序分布的蜂窝网状氧化锌纳米阵列。在室温下，通过吸收光谱仪测试样品在300～800 nm波长范围内的吸收光谱，结果表明对于具有不同尺寸晶粒的氧化锌纳米团簇样品，随着所采用的聚苯乙烯胶体球粒径的增大，即氧化锌纳米团簇粒径的增加，光吸收峰出现了宽化和红移；随着溅射时间的延长，即氧化锌薄膜膜厚的增加，光吸收率提高。此外，对氧化锌纳米团簇阵列的光吸收特性进行了基于离散偶极子近似的理论计算从而获得任意形状和尺寸粒子的吸收。目前，文献报道中用此理论计算各种形状的纳米金、银等金属的结果与实验结果相符，但是应用离散偶极子的近似理论计算氧化锌纳米颗粒的报道很少。应用此理论计算三角棱台形状的氧化锌光学吸收特性，根据氧化锌薄膜介电常数和膜厚的变化进行光吸收特性的模拟，并解释了实验结果。
採用漂移法，在玻璃襯底上製備齣粒徑分彆為117，350和500 nm單層、大麵積的聚苯乙烯膠體毬掩膜闆，在已製得的掩膜闆上用射頻磁控濺射的方法沉積一層氧化鋅薄膜，最後用有機溶液四氫呋喃（THF）浸泡去除聚苯乙烯膠體毬，穫得不同粒徑的二維氧化鋅納米糰簇。通過掃描電子顯微鏡和能量色散X射線光譜儀對樣品的形貌及成份進行錶徵，錶明所製得樣品為有序分佈的蜂窩網狀氧化鋅納米陣列。在室溫下，通過吸收光譜儀測試樣品在300～800 nm波長範圍內的吸收光譜，結果錶明對于具有不同呎吋晶粒的氧化鋅納米糰簇樣品，隨著所採用的聚苯乙烯膠體毬粒徑的增大，即氧化鋅納米糰簇粒徑的增加，光吸收峰齣現瞭寬化和紅移；隨著濺射時間的延長，即氧化鋅薄膜膜厚的增加，光吸收率提高。此外，對氧化鋅納米糰簇陣列的光吸收特性進行瞭基于離散偶極子近似的理論計算從而穫得任意形狀和呎吋粒子的吸收。目前，文獻報道中用此理論計算各種形狀的納米金、銀等金屬的結果與實驗結果相符，但是應用離散偶極子的近似理論計算氧化鋅納米顆粒的報道很少。應用此理論計算三角稜檯形狀的氧化鋅光學吸收特性，根據氧化鋅薄膜介電常數和膜厚的變化進行光吸收特性的模擬，併解釋瞭實驗結果。
채용표이법，재파리츤저상제비출립경분별위117，350화500 nm단층、대면적적취분을희효체구엄막판，재이제득적엄막판상용사빈자공천사적방법침적일층양화자박막，최후용유궤용액사경부남（THF）침포거제취분을희효체구，획득불동립경적이유양화자납미단족。통과소묘전자현미경화능량색산X사선광보의대양품적형모급성빈진행표정，표명소제득양품위유서분포적봉와망상양화자납미진렬。재실온하，통과흡수광보의측시양품재300～800 nm파장범위내적흡수광보，결과표명대우구유불동척촌정립적양화자납미단족양품，수착소채용적취분을희효체구립경적증대，즉양화자납미단족립경적증가，광흡수봉출현료관화화홍이；수착천사시간적연장，즉양화자박막막후적증가，광흡수솔제고。차외，대양화자납미단족진렬적광흡수특성진행료기우리산우겁자근사적이론계산종이획득임의형상화척촌입자적흡수。목전，문헌보도중용차이론계산각충형상적납미금、은등금속적결과여실험결과상부，단시응용리산우겁자적근사이론계산양화자납미과립적보도흔소。응용차이론계산삼각릉태형상적양화자광학흡수특성，근거양화자박막개전상수화막후적변화진행광흡수특성적모의，병해석료실험결과。
The present paper’s main work is firstly preparing a single layer and a large area polystyrene microspheres mask,with 117,350 and 500 nm in diameter,and then depositing a layer of zinc oxide thin film on the mask board by RF magnetron sputte-ring technique,using nanospheres lithography technique to remove the polystyrene spheres by soaking with tetrahydrofuran,and two-dimensional zinc oxide nano-array samples were obtained at last.The samples were characterized on the morphology and composition by scanning electron microscopy and energy dispersive X-ray spectrometer.The results showed that the samples are zinc oxide nanocluster formed by ordered cellular reticular structures.By measuring with absorption spectroscopy in the range from 300 to 800 nm at room temperature,the absorption peak turns up with broadening and red shift with the increase in the di-ameter of polystyrene colloidal spheres,namely the nano-particles diameters.As the sputtering time increases,that is,the in-crease in the zinc oxide film thickness,the light absorption rate increases.In addition,theoretical calculation based on the theory of discrete dipole approximation was performed to simulate the optical absorption properties of the zinc oxide nanocluster arrays between 300 and 800 nm.Dipole approximation theory can be used to calculate the absorption of the particles of any shape and size.Currently,the theoretical calculation results of various shapes of nanostructured metals such as gold and silver are consist-ent with the experimental results.But the application of the theory of discrete dipole approximation calculation of ZnO nanoparti-cles was rarely reported.In this paper,this theory has been used to calculate the optical absorption properties of triangle-shaped ZnO nanoparticles array.Light absorption characteristics were simulated according to changes in the dielectric constant and thickness of zinc oxide films,and the results can be used to explain the experimental results.
