Search Results - "WHETTEN, R. L"

Information on quantum states pervades the visible spectrum of the ubiquitous Au144(SR)60 gold nanocluster by Weissker, H.-Ch, Escobar, H. Barron, Thanthirige, V. D., Kwak, K., Lee, D., Ramakrishna, G., Whetten, R. L., López-Lozano, X.

“…Absorption spectra of very small metal clusters exhibit individual peaks that reflect the discreteness of their localized electronic states. With increasing…”
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Chiral symmetry breaking yields the I-Au60 perfect golden shell of singular rigidity by Mullins, S.-M., Weissker, H.-Ch, Sinha-Roy, R., Pelayo, J. J., Garzón, I. L., Whetten, R. L., López-Lozano, X.

“…The combination of profound chirality and high symmetry on the nm-scale is unusual and would open exciting avenues, both fundamental and applied. Here we show…”
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Isolation of Smaller Nanocrystal Au Molecules:  Robust Quantum Effects in Optical Spectra by Schaaff, T. G, Shafigullin, M. N, Khoury, J. T, Vezmar, I, Whetten, R. L, Cullen, W. G, First, P. N, Gutiérrez-Wing, C, Ascensio, J, Jose-Yacamán, M. J

“…Five massive gold-cluster molecules have been isolated in high yield and have undergone separate structural characterization, and their electronic structure…”
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Near-Infrared Luminescence from Small Gold Nanocrystals by Bigioni, T. P, Whetten, R. L, Dag, Ö

“…A novel photoluminescence is reported for small metal nanocrystals in the near-infrared region (1.1−1.6 μm). Near-infrared photoluminescence spectra were…”
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Electron Dynamics of Passivated Gold Nanocrystals Probed by Subpicosecond Transient Absorption Spectroscopy by Logunov, S. L, Ahmadi, T. S, El-Sayed, M. A, Khoury, J. T, Whetten, R. L

“…The electronic dynamics of gold nanocrystals, passivated by a monolayer of alkylthiol(ate) groups, were studied by transient spectroscopy after excitation with…”
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Optical Spectra of the Special Au144 Gold-Cluster Compounds: Sensitivity to Structure and Symmetry by Weissker, H.-Ch, Lopez-Acevedo, O, Whetten, R. L, López-Lozano, X

“…This report concerns the remarkable fine structure reported recently in the optical absorption spectrum of the ubiquitous icosahedral Au144(SR)60 cluster…”
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The Monolayer Thickness Dependence of Quantized Double-Layer Capacitances of Monolayer-Protected Gold Clusters by Hicks, Jocelyn F, Templeton, Allen C, Chen, Shaowei, Sheran, Kevin M, Jasti, Ramesh, Murray, Royce W, Debord, Justin, Schaaff, T. Gregory, Whetten, Robert L

“…This report describes how the electrochemical double-layer capacitances of nanometer-sized alkanethiolate monolayer-protected Au clusters (MPCs) dissolved in…”
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Chiral symmetry breaking yields the I-Au 60 perfect golden shell of singular rigidity by Mullins, S-M, Weissker, H-Ch, Sinha-Roy, R, Pelayo, J J, Garzón, I L, Whetten, R L, López-Lozano, X

“…The combination of profound chirality and high symmetry on the nm-scale is unusual and would open exciting avenues, both fundamental and applied. Here we show…”
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In Search of the Quantum-Electronic Origin of Color Change: Elucidation of the Subtle Effects of Alloying with Copper on ≈1.8 nm Gold Nanoclusters by Sinha-Roy, Rajarshi, López-Lozano, Xóchitl, Whetten, R. L, García-González, Pablo, Weissker, H.-Ch

“…Experiments on the Au144(SR)60 class of cluster compounds have demonstrated the emergence of an absorption peak at 550 nm (2.25 eV) upon adding copper to the…”
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Bundling and Interdigitation of Adsorbed Thiolate Groups in Self-Assembled Nanocrystal Superlattices by Wang, Z. L, Harfenist, S. A, Whetten, R. L, Bentley, J, Evans, N. D

“…Self-assembling of nanocrystals involves organization of nanocrystals encapsulated by protective compact organic molecules into a crystalline material. The…”
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Pressure dependence of superconductivity in single-phase K3C60 by SPARN, G, THOMPSON, J. D, HUANG, S.-M, KANER, R. B, DIEDERICH, F, WHETTEN, R. L, GRÜNER, G, HOLCZER, K

“…The superconducting compound K(3)C(60) (with transition temperature T(c) = 19.3 kelvin at ambient pressure), formed as a single phase by reaction of alkali…”
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Pressure and field dependence of superconductivity in Rb3C60 by SPARN, G, THOMPSON, J. D, WHETTEN, R. L, HUANG, S.-M, KANER, R. B, DIEDERICH, F, GRÜNER, G, HOLCZER, K

“…Direct measurements of the pressure dependence of the superconducting transition temperature Tc for single-phase Rb3C60 provide for the first time substantial…”
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The higher fullerenes : isolation and characterization of C76, C84, C90, C94 and C70O, an oxide of D5h-C70 by DIEDERICH, F, ETTL, R, KOCH, A, RUBIN, Y, WHETTEN, R. L, BECK, R, ALVAREZ, M, ANZ, S, SENSHARMA, D, WUDL, F, KHEMANI, K. C

“…The toluene extract of the fluffy carbon material produced by resistive heating of graphite contains a variety of molecules larger than C(60) and C(70) in a…”
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The colours of nanometric gold : Optical response functions of selected gold-cluster thiolates by WYRWAS, R. B, ALVAREZ, M. M, KHOURY, J. T, PRICE, R. C, SCHAAFF, T. G, WHETTEN, R. L

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Coalescence reactions of fullerenes by Yeretzian, Chahan, Hansen, Klavs, Diederichi, François, Whetten, Robert L

“…The production of fullerene molecules remains poorly understood. Extreme high-temperature conditions are needed for the process to be completed. Additional…”
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Isolation of C76, a chiral (D2) allotrope of carbon by ETTL, R, CHAO, I, DIEDERICH, F, WHETTEN, R. L

“…The isolation and characterization of the C76 molecule, a third molecular form of carbon following C60 and C70, are reported. Substantial quantities of this…”
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The unusual electron spin resonance of fullerene C60 anion radical by Allemand, P. M, Srdanov, G, Koch, A, Khemani, K, Wudl, F, Rubin, Y, Diederich, F, Alvarez, M. M, Anz, S. J, Whetten, R. L

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Scanning Tunneling Microscopy Determination of Single Nanocrystal Core Sizes via Correlation with Mass Spectrometry by Bigioni, T. P, Schaaff, T. G, Wyrwas, R. B, Harrell, L. E, Whetten, R. L, First, P. N

“…We show that single alkanethiol-passivated gold nanocrystals can be identified by core size in scanning tunneling microscopy (STM) experiments, through a…”
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Critical magnetic fields in the superconducting state of K3C60 by HOLCZER, K, KLEIN, O, GRÜNER, G, THOMPSON, J. D, DIEDERICH, F, WHETTEN, R. L

“…The temperature dependence of the lower and upper critical fields in superconducting K3C60 was measured. From the measurements, the penetration depth (lambda =…”
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Low-temperature activation of molecular oxygen by gold clusters: a stoichiometric process correlated to electron affinity by Salisbury, B.E, Wallace, W.T, Whetten, R.L

“…The adsorption–desorption equilibria of di-oxygen (O 2) on gold cluster anions ( Au N −, N=2–22 ) have been measured in the high-pressure limit by pulsed…”
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