Electron gas cooling in Ag nanoparticles on graphite

被引：12

作者：

Merschdorf, M ^{[1
]}

Pfeiffer, W ^{[1
]}

Voll, S ^{[1
]}

Gerber, G ^{[1
]}

机构：

[1] Univ Wurzburg, Inst Phys, D-97074 Wurzburg, Germany

来源：

PHYSICAL REVIEW B | 2003年 / 68卷 / 15期

关键词：

D O I：

10.1103/PhysRevB.68.155416

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The electron energy distribution in supported Ag nanoparticles is measured using multiphoton photoemission. The variation of the photoemission spectrum with temperature allows us to measure the electron gas temperature in the particles. Time-resolved photoemission reveals an electron gas cooling rate of about 0.7 ps(-1) that varies little with size (1.5-4.5 nm) and is reduced by a factor of about 2 in comparison to bulk Ag and embedded nanoparticles. The modified relaxation behavior for supported nanoparticles is attributed to the different role of excited electron transfer.

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页数：5

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