Nanocrystal probes

Xiao, Y., and Barker, P.E. (2004) Semiconductor nanocrystal probes for human metaphase chromosomes. Nucleic Acids Res. 32, e28/l-e28/5. 

S. L. Logunov T. S. Ahmadi M. A. El-Sayed J. T. Khouey R. L. Whetten, Electron dynamics of passivated gold nanocrystals probed by subpicosecond transient absorption spectroscopy. J. Phys. Chem. B 1997, 101, 3713-3719. 

CdTe/CdSe Core/Shell Nanocrystals Probed by 2DPE... 

In this section, we will describe some experiments which we have performed using the above-mentioned nano-Raman microscope. Figure 2.6a shows the Raman spectmm of an adenine nanocrystal of height 7 nm and width 30 nm [19]. Several Raman bands are observed as the probe tip is near enough to the sample (AFM operation is made in contact mode). These bands, except the one appearing at 924 cm, are assigned as the vibrational modes, inherent to the adenine molecule, according to the molecular orbital calculation. For examples, two major bands, one at... 

With these principles in mind, we refer the reader to valuable recent reviews, original reports, and discussions [65-68] of probes consisting of proteins, organic dyes, and nanoparticles such as quantum dots (QDs, [2, 68-77]) and other intriguing particles plastic microspheres and nanoparticles [78], multifunctional encoded particles [79], nanodisk codes [80], nano-flares [81], E-PEBBLES [82], C-dots [83], nanocrystal (NC)-encoded microbeads... 

Lee SY, Nakaya K, Hayashi T, Hara M (2009) Quantitative study of the gold-enhanced fluorescence of CdSe/ZnS nanocrystals as a function of distance using an AFM probe. Phys Chem Chem Phys 11 4403-9... 

The reaction can be followed by monitoring the characteristic absorption due to ZnO band-gap excitations, occurring at energies above 28,000 cm-1. The energy of the first excitonic transition depends on the nanocrystal size, and so provides a probe of nanocrystal growth. For a fixed size, the intensity of the transition provides a measure of the nanocrystal concentration (i.e., the yield of the chemical reaction), and this offers a measure of nucleation yields. 

In this section, we discuss the application of several physical methods not as analytical techniques, but as probes of the electronic structures and functionally relevant properties of doped inorganic nanocrystals. 

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