Quantum dots optical properties

Heath J R, Shiang J J and Alivisatos A P 1994 Germanium quantum dots optical properties and synthesis J. Chem. Phys. 101 1607... 

In the laboratory which takes place the week after the case stndy activity, stndents synthesize quantnm dots and investigate quantum dot optical properties. Many logistical challenges (including large student numbers, a limited equipment budget, chemical toxicity, high temperature reaction conditions, and time limitations) were overcome in order to implement this experiment in a course this size. 

Nonlinear Optical Properties and Single Particle Spectroscopy of CdTe Quantum Dots... 

Pan, L., Tamai, N., Kamada, K. and Deki, S. (2007) Nonlinear optical properties of thiol-capped CdTe quantum dots in nonresonant region. Appl. Phys. Lett., 91, 051902-1-051902-3. 

Mandal, A., Nakayama, J., Tamai, N., Biju, V. and Isikawa, M. (2007) Optical and dynamic properties of water-soluble highly luminescent CdTe quantum dots. J. Phys. Chem. B, 111, 12765-12771 Mandal, A. and Tamai, N. (2008) Influence of acid on luminescence properties of thioglycolic acid-capped CdTe quantum dots. J. Phys. Chem. C, 112, 8244-8250. 

In the 1980s, CdSe quantum dots vere prepared by top-dovm techniques such as lithography ho vever, size variations, crystal defects, poor reproducibility, and poor optical properties of quantum dots made them inadequate for advanced applications. Introduction of bottom-up colloidal synthesis of CdSe quantum dots by Murray et al. [3] and its further advancements brought radical changes in the properties of quantum dots and their applications in devices and biology. The colloidal syntheses of CdSe quantum dots are broadly classified into organic-phase synthesis and aqueous-phase synthesis. 

R. F. Haglund Jr., Quantum-dot composites for nonlinear optical applications, in R. E. Hummel, P. Wissmann (eds.) Handbook of Optical Properties II Optics of Small Particles, Interfaces, and Surfaces, Vol. 2, CRC Press, New York, 1997, 191. 

Owing to their unique (tunable-electronic) properties, semiconductor (quantum dots) nanocrystals have generated considerable interest for optical DNA detection [12], Recent activity has demonstrated the utility of quantum dot nanoparticles for enhanced electrical DNA detection [33, 34, 50], Willner et al. reported on a photoelectrochemical transduction of DNA sensing events in connection with DNA cross-linked CdS nanoparticle arrays [50], The electrostatic binding of the Ru(NH3)63+ electron acceptor to the dsDNA... 

He GS, Yong K, Zheng Q, Sahoo Y, Baev A, Ryasnyanskiy Al, Prasad PN (2007) Multiphoton excitation properties of CdSe quantum dots solutions and optical limiting behavior in infrared range. Opt Exp 15 12818-12833... 

Abstract Silver clusters, composed of only a few silver atoms, have remarkable optical properties based on electronic transitions between quantized energy levels. They have large absorption coefficients and fluorescence quantum yields, in common with conventional fluorescent markers. But importantly, silver clusters have an attractive set of features, including subnanometer size, nontoxicity and photostability, which makes them competitive as fluorescent markers compared with organic dye molecules and semiconductor quantum dots. In this chapter, we review the synthesis and properties of fluorescent silver clusters, and their application as bio-labels and molecular sensors. Silver clusters may have a bright future as luminescent probes for labeling and sensing applications. 

Yoffe, A. D. Semiconductor quantum dots and related systems Electronic, optical, luminescence and related properties of low dimensional systems. Adv. Phys. 50, 1-208 (2001). 

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