Multiple ionic-plasmon resonances in naturally occurring multiwall nanotubes: Infrared spectra of chrysotile asbestos

被引：30

作者：

Balan, E

Mauri, F

Lemaire, C

Brouder, C

Guyot, F

Saitta, AM

Devouard, B

机构：

[1] Lab Mineral Cristallog, F-75252 Paris 05, France

[2] Lab Phys Milieux Condenses, F-75252 Paris 05, France

[3] Lab Magmas & Volcans, F-63038 Clermont Ferrand, France

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.89.177401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Chrysotile asbestos is formed by densely packed bundles of multiwall hollow nanotubes. Each wall in the nanotubes is a cylindrically wrapped layer of Mg3Si2O5(OH)(4). We show by experiment and theory that the infrared spectra of chrysotile present multiple ionic-plasmon resonances in the Si-O stretching bands. These collective charge excitations are universal features of the nanotubes that are obtained by cylindrically wrapping an anisotropic material. The multiple plasmons can be observed if the width of the resonances is sufficiently small as in chrysotile.

引用

页码：177401/1 / 177401/4

页数：4

共 16 条

[1]

Balan E, 2002, AM MINERAL, V87, P1286

[2]

Balan E, 2001, AM MINERAL, V86, P1321

[3] Phonons and related crystal properties from density-functional perturbation theory [J].