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Search Publications by: David Nesbitt (Fed)

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Displaying 101 - 125 of 233

Field Enhancement in Apertureless Near-Field Scanning Optical Microscopy

December 1, 2001
Author(s)
J L. Bohn, David J. Nesbitt, Alan Gallagher
The near field of an apertureless near-field scanning optical microscopy probe is investigated with a multiple-multipole technique to obtain optical fields in the vicinity of a silicon probe tip and a glass substrate. The results demonstrate that electric

Fluorescence Intermittency in Single InP Quantum Dots

October 1, 2001
Author(s)
M Kuno, D P. Fromm, Alan Gallagher, David Nesbitt, O I. Micic, A J. Nozik
Fluorescence kinetics of isolated colloidal InP quantum dots (Qds) are investigated for the first time via confocal single molecule microscopyFluorescenceintermittency or blinking is observed in all QD's sampled, characterized by abrupt chanc,yes between

Reactivity of Vibrationally Excited Methane on Nickel Surfaces

September 1, 2001
Author(s)
L Halonen, S Bernasek, David Nesbitt
Four-Dimensional variational calculations have been performed for modeling energy flow between CH 2 stretching vibrational energy statesas the molecule adiabatically approaches a nickel surface. The model is based on a local mode Hamiltonian for isolated

On/Off Fluorescence Intermittency of Single Semiconductor Quantum Dots

July 1, 2001
Author(s)
M Kuno, D P. Fromm, H F. Hamann, Alan Gallagher, David Nesbitt
Single molecule confocal microscopy is used to investigate the detailed kinetics of fluoresence intermittency in colloidal H-VI (CdSe) semiconductor quantum dots. two distinct modes of behavior are observed corresponding to i) sustained on episodes (Τ on)

On/Off Flurescence Intermittency of Single Semiconductor Quantum Dots

July 1, 2001
Author(s)
M Kuno, D P. Fromm, H F. Hamann, Alan Gallagher, David Nesbitt
Single molecule confocal microscopy is used to investigate the detailed kinetics of fluorescence intermittency in colloidal II-VI (CdSe) semiconductor quantum dots. Two distinct modes of behavior are observed corresponding to (i) sustained on episodes (τ

Fast Vibrational Relaxation of OH (N=9) by Ammonia and Ozone

June 1, 2001
Author(s)
S A. Nizkorodov, W W. Harper, David Nesbitt
Vibrational removal of OH(X 2II) out of v=9 by 0 3 and NH 3 has been studied in a flow cell flash-photolysis apparatus using high-resolutiondirect infrared absorption detection of OH in the v=11

Fast Vibrational Relaxation of OH (v=9) By Ammonia and Ozone

June 1, 2001
Author(s)
S A. Nizkorodov, W W. Harper, David Nesbitt
Vibrational relaxation of OH(X 2II) in the Ņ=9 state by O 3 and NH 3 has been studied via flash-photolysis using high-resolution direct infrared absorption detection of OH in the Ņ= 11

JILA, National Institute of Standards and Technology, and University of Colorado at Boulder

May 1, 2001
Author(s)
D Z. Anderson, J E. Faller, M J. Holland, L Kolvalenko, S R. Leone, R McCray, David Nesbitt
The revised JILA brochure, written for those interested in NIST programs as well as for prospective graduate students, postdoctoral associates, and visiting fellows, provides an overview of JILA and its mission, and explains the joint nature of the

Molecular Fluorescence in the Vicinity of a Nanoscopic Probe

May 1, 2001
Author(s)
H F. Hamann, M Kuno, Alan Gallagher, David Nesbitt
The dramatic modifications of molecular fluorescence in the proximity of a sharp nanoscopic probe is investigated by an apertureless or antenna-based near-field scanning optical microscope, which exploits the interactions between a fluorescent sample and a