Uptake of CdSe and CdSe/ZnS quantum dots into bacteria via purine-dependent mechanisms

JA Kloepfer, RE Mielke, JL Nadeau - Applied and environmental …, 2005 - Am Soc Microbiol
Quantum dots (QDs) rendered water soluble for biological applications are usually
passivated by several inorganic and/or organic layers in order to increase fluorescence yield. …

Quantum dots as strain-and metabolism-specific microbiological labels

JA Kloepfer, RE Mielke, MS Wong… - Applied and …, 2003 - Am Soc Microbiol
… These nanocrystals are also smaller than coated QDs and may be able to cross cell walls
and membranes more easily (JA Kloepfer, RE Mielke, and JL Nadeau, submitted for …

Photophysical properties of biologically compatible CdSe quantum dot structures

JA Kloepfer, SE Bradforth… - The Journal of Physical …, 2005 - ACS Publications
The photophysical properties of CdSe and ZnS(CdSe) semiconductor quantum dots in nonpolar
and aqueous solutions were examined with steady-state (absorption and emission) and …

The flux of barium to the coastal waters of the southeastern USA: the importance of submarine groundwater discharge

TJ Shaw, WS Moore, J Kloepfer… - … et Cosmochimica Acta, 1998 - Elsevier
Dissolved Ba concentrations in the inner shelf waters of the South Atlantic Bight (SAB) are
two- to three-fold enriched in Ba when compared to Atlantic surface water. We determined that …

The ejection distribution of solvated electrons generated by the one-photon photodetachment of aqueous and two-photon ionization of the solvent

JA Kloepfer, VH Vilchiz, VA Lenchenkov… - The Journal of …, 2000 - pubs.aip.org
The ultrafast dynamics following one-photon UV photodetachment of I − ions in aqueous
solution are compared with those following two-photon ionization of the solvent. Ultrafast pump–…

Map for the relaxation dynamics of hot photoelectrons injected into liquid water via anion threshold photodetachment and above threshold solvent ionization

VH Vilchiz, JA Kloepfer, AC Germaine… - The Journal of …, 2001 - ACS Publications
… We find it impossible to reconcile the parameters from Jay-… We find it significant that Jay-Gerin
and co-workers were … We note that this spectral component was unassigned by Jay-Gerin …

Femtosecond dynamics of photodetachment of the iodide anion in solution: resonant excitation into the charge-transfer-to-solvent state

JA Kloepfer, VH Vilchiz, VA Lenchenkov… - Chemical physics …, 1998 - Elsevier
The photodetachment of iodide ions in solution is probed via ultrafast spectroscopy with ∼50
fs time resolution. Excitation of I − is achieved with a single photon at 255 nm, populating …

FRET between CdSe quantum dots in lipid vesicles and water-and lipid-soluble dyes

JA Kloepfer, N Cohen, JL Nadeau - The Journal of Physical …, 2004 - ACS Publications
Because of the coatings needed to solubilize and passivate quantum dots for biological
applications, their use in fluorescent resonance energy transfer (FRET) has been limited. …

Time-resolved scavenging and recombination dynamics from caged pairs

JA Kloepfer, VH Vilchiz, VA Lenchenkov… - The Journal of …, 2002 - pubs.aip.org
The competition between geminate recombination of electrons with their parent radicals
and electron scavenging with H + is directly time resolved with ∼100 fs resolution at several …

Solvent effects on geminate recombination dynamics after photodetachment

VH Vilchiz, X Chen, JA Kloepfer, SE Bradforth - Radiation Physics and …, 2005 - Elsevier
… A Lennard–Jones type 12-4 potential form would provide a more physical basis (Kloepfer,
2002), however, we seek only the magnitude of the interaction and its variation. For the …