Download e-book for kindle: Advances in Metal and Semiconductor Clusters (Vol. 4): by M.A. Duncan

Download e-book for kindle: Advances in Metal and Semiconductor Clusters (Vol. 4): by M.A. Duncan

By M.A. Duncan

ISBN-10: 0762300582

ISBN-13: 9780762300587

ISBN-10: 1559387041

ISBN-13: 9781559387040

ISBN-10: 1559387882

ISBN-13: 9781559387880

Cluster fabrics is the fourth quantity of the hugely profitable sequence Advances in steel and Semiconductor Clusters. during this quantity the point of interest is at the homes of clusters which ascertain their capability purposes as new fabrics. steel and semiconductor clusters were proposed as precursors for fabrics or as genuine fabrics because the earliest days of cluster study. within the previous couple of years, numerous thoughts have made it attainable to supply clusters in sizes various from a couple of atoms as much as a number of thousand atoms. whereas a few measurements are played within the fuel part on non-isolated clusters, many cluster fabrics can now be remoted in macroscopic amounts and easier stories in their homes turn into possible.In this quantity the authors specialise in size of optical, digital, magnetic, chemical and mechanical houses of clusters or of cluster assemblies. All of those houses needs to fall into applicable levels of behaviour earlier than invaluable fabrics composed of clusters might be placed into functional purposes. As evidenced by way of a few of the paintings defined the following, the realisation of sensible items in keeping with cluster fabrics appears to be like impending swiftly.

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Extra resources for Advances in Metal and Semiconductor Clusters (Vol. 4): Cluster Materials

Example text

BANIN, J. C. LEE and A. P. ALIVISATOS B. Transient Optical Holeburning Spectroscopy The distribution in nanocrystal size within a sample results in substantial inhomogeneous broadening of the absorption spectrum as a sample with a range of particle sizes will absorb at a range of energies. These inhomogeneously broadened spectra can be thought of as a sum of homogeneously broadened "single-particle" spectra for a range of sizes. Transient optical holeburning spectroscopy can be used to examine the "single-particle" spectrum revealing information on the degree of inhomogeneous broadening in the sample as well as the homogeneous linewidth.

A. GUZELIAN, U. BANIN, J. C. LEE and A. P. ALIVISATOS A. Absorption Spectroscopy Room temperature absorption spectra for a series of InAs nanocrystal sizes are shown in Figure 10 along with the photoluminescence spectra. The quantum confinement effects are clearly evident from the size-dependent nature of the spectra. The smallest particles shown are 28 ]k in diameter and the onset of absorption shifts smoothly across a number of samples to the largest size of 58/~. 35 eV. In all samples the absorption onset is characterized by a distinct feature at the absorption edge corresponding to the first excitonic excited state.

Chem. 1996, 100, 7212. 19. Guzelian, A. ; Kadavanich, A. ; Alivisatos, A. E Appl. Phys. Lett. 1996, 69, 1432. 20. Brus, L. E. J. Chem. Phys. 1984, 80, 4403. 21. Olshavsky, M. ; Goldstein, A. ; Alivisatos, A. E J. Am. Chem. Soc. 1990, 112, 9438. 22. Wells, R. ; Pitt, C. " McPhail, A. ; Purdy, A. ; Hallock, R. " Chem. Mater. 1989, 1, 4. 23. ; Curtis, C. ; Nozik, A. J. J. Phys. Chem. 1991, 95, 5382. 24. ; Curtis, C. ; Jones, K. ; Nozik, A. J. J. Phys. Chem. 1992, 96, 1156. 25. Kher, S. ; Wells, R.

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Advances in Metal and Semiconductor Clusters (Vol. 4): Cluster Materials by M.A. Duncan

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