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- For CdSe nanocrystals, the widening of band gap appears and the fluorescence emission wavelength is red shifted as the particle size increases. 由于在奈米尺度下的硒化镉可藉由改变粒径而造成能隙改变,使得硒化镉可产生多种光激发光。
- In the first part, the fluorescence emission wavelength and quantum yield of CdSe nanocrystals with different sizes were studied. 第一部份为硒化镉奈米晶之发光性质,讨论不同粒径之硒化镉奈米晶对于发光波长及发光效率的影响。
- The study of CdSe nanocrystals is a very active field of research because of the wide range of emission wavelength and the high quantum yield. 其发光波长广泛且具高发光效率,因而引起广泛地研究与讨论。
- CdSe nanocrystals CdSe纳米晶
- Severl semiconductors nanostructured materials have been invesigated including CdSe and CdTe nanocrystals, Sb_2O_3 nanowires and nanobelts. 这些半导体纳米材料分别是:硒化镉量子点,碲化镉量子点,三氧化二锑纳米线和纳米带。
- Semiconductor quantum dots (QDs) are inorganic nanocrystals consisted of a cadmium selenide (CdSe) core which was wrapped in an outer shell of zinc sulfide (ZnS). 摘要半导体量子点是无机纳米结晶,构成于硒化镉核心和硫化锌外壳。
- In this study, CdSe and core/shell CdSe/ZnSe nanocrystals were synthesized in a lipophilic phase at high temperature.The structure and optical properties of CdSe and core/shell CdSe/ZnSe were studied. 本研究系以液相合成法,在高温油相中制备硒化镉及晶核-晶壳结构之硒化镉/硒化锌奈米晶,并探讨其结构及发光性质。
- The semiconductor CdSe nanoparticles exhibit the quantum confined fluorescence. 硒化镉半导体颗粒具有量子局限效应产生的萤光。
- The JACS article outlines the mechanism with indium oxide nanocrystals. 彭表示:“我们将这一方法应用于其它体系。
- Mixing of K-carrageenan with cellulose nanocrystals(CNC)can form gel. 卡拉胶和纳米微晶纤维素(CNC)共混时可以得到凝胶多糖。
- CdSe nanoparticles obtained have a ca. 150 nm broad, continuous excitation peak and a narrow, symmetric emission peak. 合成的硒化镉纳米颗粒有150 nm 宽的激发波长范围,荧光峰窄且具有良好对称性。
- Annealing treatments cause the oxidation of Sm element and the formation of bcc-Fe nanocrystals. 热处理后,部分Sm被氧化且出现了bcc-Fe的晶粒。
- It is not easy to keep in touch with friends when they are far away. this is certainly true in my cdse. 和远方的朋友保持联系不是一件容易的事。对我来说,情形就是这样。
- Bismuth titanate(Bi_4Ti_3O_(12)(BTO)) nanocrystals have been successfully prepared by metal-organic decomposition. 利用MOD方法制备了钛酸铋(Bi4Ti3O12(BTO))纳米晶.
- TEM diffraction patterns demonstrated the coexistence of CdSe and ZnSe in a small area. TEM绕射图可证明在小范围区域内,同时存在硒化镉及硒化锌;
- N-doped carbon coated Fe,Co,Ni nanocrystals were prepared by an AC arc discharge method under nitrogen buffer gas. 采用交流电弧法;在氮气氛下合成了氮杂碳包金属Fe、Co、Ni纳米晶.
- Spherical and dendritic Bi nanocrystals were prepared by ultrasonic dispersion method. 用超声分散法制备了球形与树枝状铋纳米晶体;
- Samples for this study were prepared by placing finely dispersed powders of CdTe nanocrystals on standard Si supports. 本研究使用的样品用分散良好的碲化镉纳米晶粉末置于标准硅支持体上的方法制备。
- Due to quantum confinement effect,band gap of semiconductor nanocrystals(NCs) is dependent on the particle size. 由于量子限域效应,半导体纳米晶的能带宽随粒子大小而改变。
- The XRD、TEM and XPS results show that CdSe NCs are zinc blende structure and the mean size is smaller than 10nm in diameter. X-ray、TEM、XPS结果显示立方闪锌矿结构CdSe纳米晶分散在SiO2基质中,纳米晶尺寸约在10nm以下。