以醋酸镉、L-半胱氨酸为主要原料,采用水热法制备了尺寸小于10nm、具有强光致荧光的纤锌矿结构CdS半导体纳米晶.水热法可以将晶核形成与晶体生长阶段较好地分开,加之提供的高温熟化条件,可以得到粒度小而均匀、结构良好的纳米晶.用高分辨透射电镜(HRTEM)、XRD对产品的晶体大小、结构进行了详细地表征,分析了影响纳米晶尺寸的因素,用相关性较好的荧光激发与发射光谱研究了硫化镉纳米晶的光致荧光性能.制备的硫化镉(CdS)纳米晶结构良好、粒度均匀、荧光激发专一,最大激发波长在338nm,其发射荧光的波长位于419nm,发射强度大.
参考文献
| [1] | Gao Xiaohu;Cui Yuanyuan;Levenson R M;Chung L W K & Nie S M .Vivo Cancer Targeting and Imaging with Semiconductor Quantum Dots[J].Nature Biotechnology,2004,22:969. |
| [2] | Han,M;Gao,X;Su,JZ;Nie,S .Quantum-dot-tagged microbeads for multiplexed optical coding of biomolecules.[J].Nature biotechnology,2001(7):631-635. |
| [3] | Bruchez,M Jr;Moronne,M;Gin,P;Weiss,S;Alivisatos,AP .Semiconductor nanocrystals as fluorescent biological labels (see comments)[J].Science,1998(5385):2013-2016. |
| [4] | Chan W C W;Nie S M .Quantum Dot Bioconjugates for Ultrasensitive Nonisotopic Detection[J].Science,1998,281:2016. |
| [5] | Mattoussi H.;Goldman ER.;Anderson GP.;Sundar VC.;Mikulec FV.;Bawendi MG.;Mauro JM. .Self-assembly of CdSe-ZnS quantum dot bioconjugates using an engineered recombinant protein[J].Journal of the American Chemical Society,2000(49):12142-12150. |
| [6] | Mitchell G P;Mirkin C A;Letsinger R L .Programmed Assembly of DNA Functionalized Quantum Dots[J].Journal of the American Chemical Society,1999,121:8122. |
| [7] | Pathak S;Choi S K;Arnheim N;Thompson M E .Hydroxylated Quantum Dots as Luminescent Probes for in Situ Hybridization[J].Journal of the American Chemical Society,2001,123:4103. |
| [8] | Peng Z A;Peng X G .Formation of High-quality CdTe,CdSe,and CdS Nanocrystals Using CdO as Precursor[J].Journal of the American Chemical Society,2001,123:183. |
| [9] | Murray C B;Norris D J;Bawendi M G .Synthesis and Characterization of Nearly Monodisperse CdE (E = S,Se,Te) Semiconductor Nanocrystallites[J].Journal of the American Chemical Society,1993,115:8706. |
| [10] | Peng X G;Schlamp M C;Kadavanich A V;Alivisatos A P .Epitaxial Growth of Highly Luminescent CdSe/CdS Core/shell Nanocrystals with Photostability and Electronic Accessibility[J].Journal of the American Chemical Society,1997,119:7019. |
| [11] | Hines M A;Guyot-Sionnest P .Synthesis of Strongly Luminescing ZnS-capped CdSe nanocrystals[J].Journal of Physical Chemistry B,1996,100:468. |
| [12] | Peng XG.;Alivisatos AP.;Wickham J. .Kinetics of II-VI and III-V colloidal semiconductor nanocrystal growth: "Focusing" of size distributions[J].Journal of the American Chemical Society,1998(21):5343-5344. |
| [13] | 郝霄鹏;崔得良;白玉俊 等.氮化硼纳米晶的低温苯热合成[J].功能材料,2001,32:1247. |
| [14] | 孙聆东,雪峰,钱程,廖春生,严纯华.水热法合成CdS/ZnO核壳结构纳米微粒[J].高等学校化学学报,2001(06):879-882. |
| [15] | Qian Yitai;Su Yi et al.Hydrothermal Preparation and Characterization of Nanocrystalline Powder of Sphalerite[J].Materials Research Bulletin,1995,30:601. |
| [16] | 苏宜;谢毅;陈乾旺;钱逸泰 .纳米ZnS、CdS水热合成及其表征[J].应用化学,1996,13(15):56. |
| [17] | 舒磊,俞书宏,钱逸泰.半导体硫化物纳米微粒的制备[J].无机化学学报,1999(01):1-7. |
| [18] | 林章碧,苏星光,张家骅,金钦汉.纳米粒子在生物分析中的应用[J].分析化学,2002(02):237-241. |
| [19] | Yao Jian-Xi;Zhao Gao-Ling;Han Gao-Rong .The effect of the ratio of thiourea to Cd~(2+) on the properties of CdS nanoparticles[J].Microelectronic engineering,2003(1/4):115-120. |
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