Mechanical properties of nanotubes of polyelectrolyte multilayers

被引：21

作者：

Cuenot, S. ^{[1
]}

Alem, H. ^{[2
]}

Louarn, G. ^{[1
]}

Demoustier-Champagne, S. ^{[2
]}

Jonas, A. M. ^{[2
]}

机构：

[1] Univ Nantes, Inst Materiaux Jean Rouxel IMN, F-44322 Nantes 3, France

[2] Catholic Univ Louvain, Unite Phys & Chim Hauts Polymeres, B-1348 Louvain La Neuve, Belgium

来源：

EUROPEAN PHYSICAL JOURNAL E | 2008年 / 25卷 / 04期

关键词：

D O I：

10.1140/epje/i2007-10291-3

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The elastic properties of nanotubes fabricated by layer-by-layer (LbL) assembly of polyelectrolytes in the nanopores of polycarbonate track-etched membranes have been investigated by resonant contact Atomic Force Microscopy (AFM), for nanotube diameters in the range of 100 to 200nm. The elastic modulus of the nanotubes was computed from the resonance frequencies of a cantilever resting on freely suspended LbL nanotubes. An average value of 115MPa was found in air for Young's modulus of these nanostructures, well below the values reported for dry, flat multilayers, but in the range of values reported for water-swollen flat multilayers. These low values are most probably due to the lower degree of ionic cross-linking of LbL nanotubes and their consequently higher water content in air, resulting from the peculiar mode of growth of nanoconfined polyelectrolyte multilayers.

引用

页码：343 / 348

页数：6

共 35 条

[11] Salt softening of polyelectrolyte multilayer capsules [J].