Femtonewton Force Sensing with Optically Trapped Nanotubes

被引：108

作者：

Marago, O. M. ^{[2
]}

Jones, P. H. ^{[3
]}

Bonaccorso, F. ^{[2
,4
]}

Scardaci, V. ^{[1
]}

Gucciardi, P. G. ^{[2
]}

Rozhin, A. G. ^{[1
]}

Ferrari, A. C. ^{[1
]}

机构：

[1] Univ Cambridge, Dept Engn, Cambridge CB3 0FA, England

[2] Ist & Proc Chim Fis, CNR, I-98158 Messina, Italy

[3] UCL, Dept Phys & Astron, London WC1E 6BT, England

[4] Univ Messina, Dipartimento Fis Mat & Ingn Elettron, I-98166 Messina, Italy

来源：

NANO LETTERS | 2008年 / 8卷 / 10期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1021/nl8015413

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We extract the distribution of both center-of-mass and angular fluctuations from three-dimensional tracking of optically trapped nanotubes. We measure the optical force and torque constants from autocorrelation and cross-correlation of the tracking signals. This allows us to isolate the angular Brownian motion. We demonstrate that nanotubes enable nanometer spatial and femtonewton force resolution in photonic force microscopy, the smallest to date. This has wide implications in nanotechnology, biotechnology, nanofluidics, and material science.

引用

页码：3211 / 3216

页数：6

共 34 条

[1] Manipulation and assembly of nanowires with holographic optical traps [J].