| Автор | Heilmann, A. |
| Автор | Kreibig, U. |
| Дата выпуска | 2000 |
| dc.description | Metal nanoparticles (gold, silver, copper) that are embedded in an insulating organic host material exhibit optical plasma resonance absorption in the visible and near-infrared region. The spectral position, the half width and the intensity of the plasma resonance absorption all depend on the particle size, the particle shape, and the optical behavior of the cluster and the host material. The optical extinction of various gold, silver or copper particle assemblies embedded in plasma polymer or gelatin was measured at 4.2 K and 1.2 K as well as at room temperature. The packing density of several samples was high enough to resolve a reversible increase of the plasma resonance absorption intensity towards lower temperatures. Additionally, at larger silver particles $D_{\rm m} > 50$ nm a significant blue shift of the plasma resonance absorption was measured. Particle size and shape distribution were determined by transmission electron microscopy (TEM). For the first time, simultaneous measurements of the electrical and optical properties at one and the same particle assembly were performed at low temperatures. Contrary to the increasing optical extinction, the d.c. conductivity decreased to two orders of magnitude. At silver particles embedded in a plasma polymer made from thiophene a significant photocurrent was measured. |
| Формат | application.pdf |
| Издатель | EDP Sciences |
| Копирайт | © EDP Sciences, 2000 |
| Название | Optical properties of embedded metal nanoparticles at low temperatures |
| Тип | research-article |
| DOI | 10.1051/epjap:2000132 |
| Electronic ISSN | 1286-0050 |
| Print ISSN | 1286-0042 |
| Журнал | The European Physical Journal Applied Physics |
| Том | 10 |
| Первая страница | 193 |
| Последняя страница | 202 |
| Аффилиация | Heilmann A.; RWTH Aachen, I. Physikalisches Institut, 52056 Aachen, Germany |
| Аффилиация | Kreibig U.; RWTH Aachen, I. Physikalisches Institut, 52056 Aachen, Germany |
| Выпуск | 3 |
