TO
1 - 25 of 6
| Creator | Title | Description | Subject | Date | ||
|---|---|---|---|---|---|---|
| 1 |
 | Vardeny, Zeev Valentine | Conjugation-length dependence of spin-dependent excition formations rates in ∏-conjugated oligomers and polymers | We have measured the ratio, r =ơ s/ơT of the formation cross section, ơ of singlet and triplet excitons from polarons in ∏-conjugated oligomer and polymer films, using a spectroscopic technique we developed recently. We discovered a universal relation between r and the conjugation length (CL): ... | pi-conjugated polymers; Conjugation length; Polaron recombination | 2002-04 |
| 2 |
 | Lupton, John Mark | Intrinsic room-temperature electrophosphorescence from a π-conjugated polymer | Electrically induced phosphorescence from a poly(para-phenylene) ladder-type polymer is observed for the first time and characterized using time resolved spectroscopy. Short-lived phosphorescence is also observed in gated fluorescence spectra and is found to be quenched reversibly by oxygen. Therm... | pi-conjugated polymers; Electrophosphorescence; Ladder-type polymer; Gated fluorescence spectra | 2002-09 |
| 3 |
 | Liu, Feng | Nanostressors and the nanomechanical response of a thin silicon film on an insulator | Pseudomorphic three-dimensional Ge nanocrystals (quantum dots) grown on thin silicon-on-insulator substrates can induce significant bending of the silicon template layer that is local on the nanometer scale. We use molecular dynamics simulations and analytical models to confirm the local bending of... | Nanostressors; Nanomechanical response; Thin silicon film | 2002-09 |
| 4 |
 | Vardeny, Zeev Valentine | Photoinduced quantum interference antiresonances in ∏-conjugated polymers | We observed photoinduced quantum interference antiresonances between several discrete infraredactive vibrations and the lower-polaron continuous absorption band in a series of p-conjugated polymer films having superior planar orders, where the polaron transition energy is relatively small. The phot... | pi-conjugated polymers; Antiresonances; Fano-type antiresonances | 2002-05 |
| 5 |
 | Liu, Feng | Self-assembly of three-dimensional metal islands: nonstrained versus strained islands | A theoretical model for the Volmer-Weber growth of three-dimensional metal islands is proposed, with a dipolar island edge-edge interaction. The existence of such an island edge effect makes the island shape dependent on island size. Furthermore, it induces a stable island size against coarsening, l... | Self-assembly; Three dimensional islands; Metal islands; Nonstrained islands; Strained islands; Volmer-Weber growth | 2002-11 |
| 6 |
 | Liu, Feng | Self-organized nanoscale pattern formation on vicinal Si(111) surfaces via a two-stage faceting transition | We demonstrate a self-organized pattern formation on vicinal Si(111) surfaces that are miscut toward the [211] direction. All the patterns, consisting of a periodic array of alternating (7 X 7) reconstructed terraces and step-bunched facets, have the same periodicity and facet structure, independent... | Vicinal Si(111); Nanoscale pattern formation; Two-stage; Faceting transition | 2002-02 |
1 - 25 of 6